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1Plasma Display Panel Troubleshooting - 2007

60PC1D

Training PresentationAdvanced Dual Scan PDP Troubleshooting


Contact Information

Customer Service (and Part Sales) (800) 243-0000Technical Support (and Part Sales) (800) 847-7597

USA Website (GCSC) aic.lgservice.comCustomer Service Website us.lgservice.com

LG CS Academy lgcsacademy.com

Published March 2007 by LG Technical Support and Training

Troubleshooting


Preliminary Matters (The Fine Print)IMPORTANT SAFETY NOTICE

The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product, personal injury and property damage can result. The manufacturer or seller maintains no liability for the interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.

Troubleshooting


Preliminary Matters (The Fine Print)

CAUTION

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be aware that many household products present a weight hazard. At least two people should be involved in the installation or servicing of such devices. Failure to consider the weight of the product could result in physical injury.

Troubleshooting



ESD NOTICE

Some of the electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage the electronics in a manner that renders them inoperative or reduces the time until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before removing a replacement part from its package, touch the anti-static bag to a ground connection point or unpainted metal in the product. Handle the electronic controlassembly by its edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

Troubleshooting


Preliminary Matters (The Fine Print)REGULATORY INFORMATION

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help.

Troubleshooting



COMPLIANCE

The responsible party for this device’s compliance is:

LG Electronics Alabama, Inc. 201 James Record Road, Huntsville, AL, 35824.

Troubleshooting


Safety & Handling Regulations

1. Check the appearance of Panel and boards.

2. Check the model label. Verify model names and board model matches.

3. Check details of defective condition and history.

Ex) COF long 2-1 fail, address 1 line open, Y b/d trouble, Mal-discharge on screen.

1. Approximately 10 minute pre-run time is required before any adjustments are performed.

2. Do not adjust for higher or lower voltage ( Refer to Voltage Sticker inside the Panel ) than is specified for the product.

3. Be cautious of electric shock from the PDP module since the PDP module uses high voltage, it is recommended that you

should not touch the Power Supply or Drive circuits for at least one minute because of residual current stored.

4. C-MOS circuits are used extensively for processing the Drive Signals and should be protected from static electricity.

5. The PDP Module must be carried by two people.

6. Be careful of short circuits when measuring voltages.

7. Be cautious of screws and other metal objects to prevent a short in the circuitry.

Checking Point before Requesting MODULE Repair

Safety Rules PLASMA Overview Troubleshooting


Troubleshooting StepsDefine, Localize, Isolate and Correct

• Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc.

• Localize After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.

• Isolate To further isolate the failure check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.

• Correct The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer.

Troubleshooting


Overview of Topics to be Discussed

•Y SUS Board

•Z SUS Board•Y Drive Board

•Control Board•X Drive Boards

2. Circuit Board Operation, Troubleshooting and Alignment :

Troubleshooting

1. Disassembly Instructions, Circuit Board Layout, and Identification

•Switch mode Power Supply


This section of the manual will discuss Disassembly, Layout and Circuit Board Identification, of the 60PC1D Dual Scan Plasma Display Panel.

Troubleshooting

Upon completion of this section the Technician will have a betterunderstanding of the disassembly procedures, the layout of the printedcircuit boards and be able to identify each board.


Disassembly Procedure 60PC1D

Troubleshooting

To remove the Back Cover remove the 40 screws as shown ( the stand will not need to be removed )


Troubleshooting60PC1D First Generation

Control Board

SMPS Board6709V00016A

Y SUSBoard

Z SUSBoard

AC/DC Board

6709V00018A

Main BoardEBT32634401

Y DriveBoards

Top X Boards

Bottom X BoardsBottom X Boards

Circuit Board Layout

PFC / Standby6709V00017ASTB

Supply

Note : The Power Supply Circuit consists of 3 PCBs in Generation 1 and 2 PCBs in Generation 2


60PC1D Second GenerationCircuit Board Layout Troubleshooting

SMPSEAY32961901

Control BoardEBT32929501

PFC / StandbyEAY32961801

Note: The Early Version prior to ( March / April 2007 ) had theAC/DC Supply Board in this Position

The Power Supply and Control Boards are not interchangeableFrom one Generation to the other.


Input Jacks

Troubleshooting60PC1DCircuit Board Layout


TroubleshootingDisassembly Procedure 60PC1D

AC/DC Board Removal

Remove Cables P801 ( AC Input Cable ), P8015A ( P-CTL, Rush, 12V ), P8017A ( PFC B+, B- ) andP8016A ( Standby B+, AC Detect ). Remove 6 screws securing the Board.

Power Supply PFC (pulse Frequency coefficient) Board Removal

Remove Cables P8017B ( PFC B+, B- ), P8016B ( Standby B+, AC Detect ), P8015B ( P-CTL, RUSH, 12V ),P801A ( AC ON, P- CTL, ST 5V, GND, VS ON, 5V MNT, POD ), P804 ( 5V MNT, POD, GND, RUSH, VSON ),and P803A ( PFC+, AC GND, 18V ). Remove 6 screws securing the Board.

SMPS Board Removal

Remove Cables P803B ( PFC B+, AC GND, 18V ), P804B ( POD, GND, RUSH, VSON ), P801B ( 19V, 19V,GND, GND, 6V, GND, 3.4V, GND, 12V, GND ), P800B ( 3.4V, 3.4V, GND, GND, 6V, 6V, GND, GND,12V, 12V, GND, GND ), P8012 ( 5VDC, GND ), and P8011 ( VA, GND, VS ). Remove 8 screws securing the Board.

Z SUS Board Removal

Remove Cables P12 ( 5V, 5V, GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P1 (GND, GND, 5V, VA ),P9 ( GND, GND, 5V, VA). Remove 7 screws securing the Board.

PC Boards appearing on this list Contain CMOS Semi Conductors and are ESD Sensitive


Disassembly Procedure 60PC1D Troubleshooting

Y SUS Board Removal

Remove Cables P1 ( VS, VS, NC, GND, GND, GND, GND, VA, VA ), P2 ( GND, GND, 5VDC, 5VDC ) P3 ( GND, GND, GND, GND, 5VDC, 5VDC, 5VDC, 5VDC ), P4 ( Logic Signals ), P5 ( 5VDC, 5VDC,GND, GND, GND, GND, GND, NC, VA, VA, VS, VS ), P6 ( GND, GND, 5VDC, VA ),P7 ( GND, GND, 5VDC, VA ), P8 ( SUS_ DNT, 15V, 15V, SUS_ DNT, OC1_T_IN, OC2_T_IN, LET, NC,SUS_DNT, DATA_T, CLKT_IN, SUS_DNT ), P10 ( SAME AS P8 ). Remove 14 screws securing the Board.

Control Board Removal

Remove Cables P101, P102, P103, P104, P105, P106, ( RGB Logic Signals ), P200 ( Y SUS Logic Signals ),P300 ( 5VDC, 5VDC, 5VDC, 5VDC, GND, GND, GND, GND ). Remove 5 screws securing the Board.

Top Y Drive Board Removal

Remove 10 Screws from the Metal Bracket marked “A” ( see page 19 ) to gain access to the Top Y Drive Board. Carefully remove the Ribbon Cables P8, P9, P12, P13, P14, P15 and Connectors P2 ( Refer to P8 on the Y SUS Board ), and P4 ( Floating Ground ). Remove 5 screws securing the Top Y Drive Board.

Bottom Y Drive Board Removal

Remove 10 screws from the Metal Bracket marked “A” ( see page 18 ) to gain access to the BottomY Drive Board. Carefully remove the Ribbon Cables P6, P7, P16, P19, P20, P21 and Connectors P1 ( Refer to P8 on the Y SUS Board ) and P3 ( Floating Ground ). Remove 5 screws securing the BottomY Drive Board.


Disassembly Procedure 60PC1D Troubleshooting

Top Middle X Drive Board Removal

X Board Removal will require the most disassembling of the unit as the Stand will need to beremoved. Refer back to page 19 and everything marked with a B will need to be removed tochange the X Boards. Start by laying the unit down on a table covered by a soft pad, be carefulnot to scratch the screen, and remove the Stand. Two large screws recessed in Lower Chassis

Assembly will need to be removed to get the stand removed. After the Stand the Lower Chassis Assembly which includes the Main Board will need to be removed.

The Main Board is part of the Lower Chassis and will not need to be separated from the assembly, to remove the assembly, connectors P4004 ( from P 801A ), P4005 ( from P101B ), P4003 ( from P800B ), P4007 ( from the Keyboard ), P5002 ( from the Side Input Jacks ), P7009 and 7010 ( Speakers ),P6007 ( Y SUS Fan ) and P6009 ( Main Fan ), and last the LVDS Cable ( care must be taken as the LVDS Cable is very fragile ), will need to be removed. Remove the 9 screws securing the Lower Chassis Assembly and the AC Input Grounding Screw disconnect P801 ( AC Input )from the AC/DC Supply Board and lift the Assembly clear place it in a secure location.

Care must be taken as there are different size screws with different thread design

Remove the 6 screws ( ea ) securing both Wall Mounting Support Brackets and set them aside. Remove the 4 mounting screws for the Cooling Fan disconnect the connector and set it aside. Access is nowavailable to remove the screws from the brackets that hold the TCP IC’s and Ribbons in place. Remove the brackets, being careful not to damage the Ribbon Cables, last remove the Ribbon Cablesand screws from the X Board to be replaced.


A

A

A

TroubleshootingDisassembly Procedure 60PC1D

BB

B

BB

B BB

BBB


Z SUS Board

Top X Drive Boards

5v, VA, VS

VA, VS

5v

5v, VA

5v, VA

Switch Mode Power Supply

Y SUS Board

Bottom X Drive Boards

ControlBoard

5v, VA

5v

5v, VARGBLogic Signals

RGBLogic Signals

Logic Signals

5v, VA

Y Drive Top

5V, VA

Y Drive Bottom

Logic Signal

Logic Signal

Signal and Voltage Distribution for the 60PC1

5V, VA

5V, VA

5v, VA

RGBLogic Signals

Troubleshooting

AC/ DCPowerSupply

PFCSupply

STB

MainBoard

LVDS

ON OFFCONTROL

Y DriveSignal

5V, VA


P208 P207 P206 P201

P211

P209 P210

P106 P105 P102

P109P110

P303 P304 P306

P309

P301

P604 P603 P602

P601

P608

P507 P505 P502

P509 P510P511

P404 P403 P402

P411P410

P200

P300 P101 P102 P103

P104 P105 P106

P8011

P8012

P800B

P101B

VR8501 VS

VR8401 VA

IC7SUS-IPM

IC2ER-IPM

P9

P1P12

IC7SUS-IPM

IC2ER-IPM

P7

P6 P5

P1

P2

P3

P4

P4005P4004

P308

P3

P5

P6

IC45

Front Key PCB

P111 P212

P3

P10P1

P8P2 P2

P803AP804A

P801A

P8017BP8016B

P8015B

P8017A

P8015A

P8016A

P801

P4003P6008 P6007

P6009

P7009

P7010

P5002

P4007

P804BP803B

P409 P512

P202P203P204P205P108 P107 P104 P103 P101

P503 P501 P607 P606 P605

P307P305P302

P401 P508 P506 P504P408 P407 P406 P405

Tuner

P15

P6

P7

P8

P9

P12

P13

P14

P21

P16

P19

P20

P4 P1

TP1

TP19

D2

D1

Ramp_up – TP38SW – TP37

Ramp_dn – TP36Set_dn – TP35Pass_B – TP34

Pass_Top – TP33VSC – TP32

Pass_1 – TP31OC1 – TP30LEB – TP29LET – TP28

B Data – TP27B Clock – TP26T Data – TP25T Clock – TP24

ER_up – TP23ER_dn – TP22Sus_up – TP21Sus_dn – TP20

R1Out 00 – 13TP 39 - 52

G1Out 00 – 13TP 53 - 66

B1Out 00 – 13TP 67 - 80

R2Out 00 – 13TP 81 - 94

G2Out 00 – 13TP 95 - 108

B2Out 00 – 13TP 109 - 122

Addr_STB – TP 131Mis_Flag_Out – TP 130VS-DA – TP 129Blank_DA – TP 128RAS_Data1 – TP 127RAS_Data2 – TP 126RAS_STB1 – TP 125*Solder filled TP – TP 124RAS_STB2 – TP 123

Pin1 to 8 - TP132Pin 9 to 12 - TP133

All = TP133

Pin 1 = TP134 to 145.

TP148- TP177

STBY Run STBY Run STBY Run STBY Run STBY Run1 4.9v 4.9v AC-ON 1 0 379.5v PFC+ 1 0 2.6v 5V MNT 1 11.7v .7v P CTL 1 155V 155V ST-BY B+2 0 3.7v P-CTL 2 0 379.5v PFC+ 2 0 2.5v POD 2 11.7v .7v Rush 2 18V 18V ST-BY B-3 5.0v 5.0v ST-5V 3 0 0 NC 3 0 0 GND 3 12v 12v 12v4 0 0 GND 4 0 0 GND 4 0 8.1v Rush5 0 2.7v V SON 5 0 0 GND 5 0 2.6 V SON6 0 2.7v 5V MNT 6 0 0 NC7 0 2.6v POD 7 0 0 GND

8 024v 17.5v 18V

P8015BP801A P803A P804A P8015B

1 19.5v 19V 1 3.4v 3.4V 1 379.5v PFC B+ 1 60v VA 1 5v 5V2 19.5v 19V 2 3.4v 3.4V 2 379.5v PFC B+ 2 60v VA 2 5v 5V3 0 GND 3 0 GND 3 0 NC 3 0 GND 3 GND GND4 0 GND 4 0 GND 4 0 GND 4 0 GND 4 GND GND5 5.8v 6V 5 5.8v 6V 5 0 GND 5 0 GND6 0 6V 6 5.8v 6V 6 0 PF COK 6 0 NC7 3.4v 3.4V 7 0 GND 7 0 GND 7 193V VS8 0 GND 8 0 GND 8 17.8v 16V 8 193V VS9 12v 12V 9 12v 12V 9 193V VS10 0 GND 10 12v 12V

11 0 GND12 0 GND

P8011 P8012P101B P800B P803B

1 19.75v P+19V 1 4.95v AC-DST 1 3.4v 3.3V STBY RUN2 19.75v P+19V 2 3.7v RL-ON 2 3.4v 3.3V 1 2.6v 03 0 GND 3 5.0v ST-5V 3 0 GND 2 0 3.3v4 0 GND 4 0 GND 4 0 GND 3 0 05 5.8v NC 5 2.7v INV I/O 5 5.8v 6.0V 4 5.0v 5.0v6 0 GND 6 2.7v 5V HNT 6 5.8v 6.0V 5 0 07 3.4v 3.3V 7 2.5 POD/INV 7 0 GND 6 4.0v 4.0v8 0 GND 8 0 ST-5V 8 0 GND 7 0 09 12.1v NC 9 0 GND 9 12.1v 12.0V 8 3.4v 3.4v10 0 GND 10 0 PWM 10 12.1v 12.0V 9 0 0

11 0 46.0V 11 0 GND 10 3.4v 3.4v12 0 GND 12 0 GND13 0 LIVE ON

P4003 P4004 P4005 P40071 193v VS 1 0 GND 1 0 1 1.5v 1 5.0v 1 0 GND 1 0 GND2 193v VS 2 0 GND 2 0 2 .43v 2 5.0v 2 0 GND 2 0 GND3 193v VS 3 5.2v 5V 3 0 3 0 3 0 3 4.8v 5V 3 4.8v 5V4 0 GND 4 5.2v 5V 4 0 4 0 4 0 4 0 NC 4 0 NC5 0 GND 5 5v 5 0 5 0 5 59.8v VA 5 59.8vVA6 0 GND 6 5v 6 0 6 07 60v VA 7 5v 7 0 7 08 60v VA 8 5v 8 0 8 .2v

9 0 9 59.9v10 0 10 59.9v11 0 11 193.1v12 4.6v 12 193.1v13 1.9v14 015 2.6v

P7P4 P5P1 P2 P3 P6

STBY RUN STBY RUN STBY RUN1 12VDC 12VDC 1 155VDC 155VDC 1 0 VDC 99.5VDC2 11.7VDC 0.7VDC 2 18VDC 18VDC3 11.7VDC 0.7VDC

P8016AP8015A P8017A

1 0 GND 1 0 1 0 GND 1 5.0v2 0 GND 2 .3v 2 0 GND 2 5.0v3 5v 5V 3 .3v 3 5v 5+ 3 04 0 NC 4 .48v 4 0 NC 4 05 59.5v VA 5 0 5 60.0v VA 5 0

6 0 6 07 0 7 08 3.0v 8 .2v9 0 9 59.9v10 1.85v 10 59.9v11 0 11 193v12 0 12 193v

P9P1 P2 P12

1 0v GND2 0v GND3 5.1v 5V 4 0 NC5 60v VA

P309


P1


P608


P9


P7


P410


P6


P110

VSET UP

VSET DN

VSC

-VY

VR! Vsetup

R60

VSC TP

Y SUS TP178

IC42IC46

IC44 IC24

IC4013IC4008

VR88013.3V

VR801

P8201 NC

Pin 1 Pin 2 Pin 3IC24 5.0v 2.4v 0IC42 5.0v 1.7v 0IC44 5.0v 3.2v 0IC45 5.0v 3.2v 0IC46 5.0v 3.2v 0

Pin 1 Pin 2 Pin 3 Pin 4 Pin 5IC4008 3.3v 3.3v 0 1.1v 2.5vIC4013 5.7v 3.1v 4.9v 0 0

P5002 NC

TP 0 – Y&Z SUS in sync

Z_SUS TP179

TP 0 – Y&Z SUS in sync


P111, P212

VR88025VDC


P409, P512

Z-BIAS

R168GND-VY Test point

TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180TP180

TP180TP180TP180

TP180TP180TP180TP180TP180

TP180

TP181

TP181

TP181

TP181

TP181

TP181

TP181

TP181

TP181

TP181

TP181

TP181

Troubleshooting60PC1D Interconnect- Test Point Location and Voltage Chart

22

TP0

TP1

TP2

TP3

TP4

TP5

TP6

TP7

TP8

TP9

TP10

TP11

TP12

TP13

TP14

TP15

TP16

TP17

TP18

TP19

TP20

TP21

TP22

TP23

TP24

TP25

TP26TP27

TP28

TP29

TP30

23

TP31

TP32

TP33

TP34

TP35

TP36

TP37

TP38

TP39

TP40

TP41

TP42

TP43

TP44

TP45

TP46

TP47

TP48

TP49

TP50

TP51

TP52

TP53

TP54

TP55

TP56

TP57

TP58

TP59

TP60

24

TP64

TP65

TP66

TP67

TP68

TP69

TP70

TP63

TP62

TP61 TP71TP72TP73

TP74

TP75

TP79

TP78

TP81

TP82

TP83

TP84

TP86

TP87

TP88

TP89

TP90

TP91

TP76

TP77

TP80

TP85

TP92

TP93TP94

TP95

25

TP99

TP100

TP98

TP97

TP96 TP101

TP102

TP103

TP104

TP105

TP106

TP107

TP108

TP111

TP113

TP114

TP115

TP117

TP118TP119TP120

TP123

TP124

TP109

TP110

TP112

TP116

TP125TP126

TP127TP121

TP122 TP128

26

TP132

TP133

TP131

TP130

TP129 TP134

TP135

TP136

TP137

TP138

TP139TP140

TP141

TP145

TP147

TP148PIN 1

TP149PIN 2

TP151PIN 4

TP152PIN 5

TP155PIN 8

TP156PIN 9

TP142

TP143

TP146

TP150PIN 3

TP157PIN 10

TP158PIN 11

TP153PIN 6

TP154PIN 7

TP159PIN 12

TP144

LVDS Cable pin 1 is GND

27

TP163PIN 16

TP164PIN 17

TP162PIN 15

TP161PIN 14

TP160PIN 13

TP165PIN 18

TP166PIN 19

TP167PIN 20

TP168PIN 21

TP169PIN 22

TP170PIN 23

TP171PIN 24

TP175PIN 28

TP177PIN 30

TP178

TP179

TP172PIN 25

TP173PIN 26

TP176PIN 29

TP174PIN 27

TP180

TP181


Always refer to the Voltage Sticker located in the upper right side of the PDP for the correct operating voltage levels for the DC 5V, VA, VS ( Power Supply Voltages ),V SET UP, -VY, VSC, ( Y SUS Voltages ) and Z Bias ( Z SUS Voltage ) as they will vary from Panel to Panel.

V SET_UPVSC

Model : PDP 60X6#### All Voltage : DC 5VVa : 60V Vs : 193V250 / -65 / 110 / NA / 170Max Watt : 570 W ( Full White )

Z_BIAS-VY

60PC1D Plasma Display

Important Note

Troubleshooting


Troubleshooting60PC1D Second GenerationCircuit Operation

The ON/ OFF Command for the Power Supply is developed on the Main Board, see page 30, and when the set is turned on, a high is applied as to the Base of Transistor Q 234. Transistor Q 234 Collector goes low causing the Gate of U241 to go low.With a low on the Gate of U241 the Cathode voltage will rise tuning off the Photo Coupler PC201 resulting in less feedbackto Pin 2 of U151, see page 31, and more output voltage to develop at the secondary side of the supply. The 6.5V Supply is sampled to provide feedback correction by the resistor network of resistors R234, R238, and R233 and sent to the Gate of U241were it is used to control the conduction of U241, and PC201, finally controlling Pin 2 of U151 by either increasing ordecreasing the feedback.

IC151 is the Power Regulator IC, start up voltage is developed from resistor R167, the Run Line used to maintain operation is Supplied by the circuit of D156, Q152, R151, ZD151, D153 and R160, see page 31, highlighted in yellow. The Power RegulatorTransformer T201 supplies the Power FET Q151 Drain. Q151 is protected by the snubber circuit of D152, C151, and R155from any back EMF caused by Transformer T201. The Gate of Q151 is driven by IC151, R154, R153,and D151. TransistorQ151 Source returns to ground via Current Sense Circuit ( Highlighted in Red on page 32 ) at Resistor R157. OCP (Over Current Protect ) is developed by monitoring the increased voltage drop across R157 and sending it to pin 3 of IC151 to shutdown the regulator circuit in the event of an Over Current Condition.

Over Voltage protection ( Highlighted in Blue on Page 31 ) is accomplished if the break over voltage across Diode Z152 increases turning on Q153 causing diode D154 to turn on lowering the voltage to both Pin 2 of IC151, causing the secondary voltage at T201 to lower, and the Base of Q152 to lower, which lowers the VCC voltage at Pin 6 of IC151 thereby shuttingdown the Power Supply.


C24

1

C24

2

C24

0

C24

4

On / OffFrom Micro


OVP

To Photo Coupler IC PC210

Start Resistor

Current Sensing Resistor


R158

R161

R157

R155

R153

R154

R167

R152

C154 C151

D152D151

R159

R166

R160 R151

D156

C157ZD151C156

C155

C158

D154D154

C158

D153

ZD152

Q153

Q152

Q151

U151

ZD153

D185

T201

ADJ

FB

SENCE

GND

HV

GATE

VCC

VCC2VCC1

STBY Input

C24

1

C24

2

C24

0

C24

4

L231

Q234

R234

R235

RL1

R254

C235

R243

R244 R245

U241

R233

6.5VDC

C243

PC201

R238

K

A

D

R202

D201

C201

R215

Q206

T201

R206

Q201R205

C202

Q202

C207R204

R203

C205

R213

R210

R201C203

Q204

C204

R217

T201

R230

R231

C223

R222

C208 ZD201

D202

R212

R211

T201

T201

L251Q270

Q233

C222

D222

T201

T201

C251

T201

U251KIA34063A

C256

R250

T201

R262

T201

D256

T201

Q261

T201

T201

C252 C258

C257 T201

T201

VR251

T201T201

C234

T201

HOT

COLD

HOT COLD

D221

R242 C230

D233

D234

6 VDC

3.4 V

3.4 V – ON

STBY 5V

?????

6 V

Switch Collector Driver Collector

1

2

3

4

8

7

6

5

I pk SenceSwitch Emitter

Timing Capacitor

GND

VCC

Capacitor Inverting Input

SOUND

Green - StartupYellow – RunBlue – OVPRed – OCPViolet - Feedback

Feedback


The 60PC1D Plasma Display contains 3 Power Supply related Circuit Boards and 4 Power Supply Circuits which supply power requirements to the unit. The AC/DC Power Supply Board, the Standby Power Supply and the PFC ( Pulse Frequency Coefficient ) Supply Board and the SMPS ( Switch Mode Power Supply ).

The following circuit explanations will give the Technician a betterunderstanding of the operation and adjustment of each board and how to isolate which board may be at fault in the event of a failure should one occur.

60PC1D Power Supplies First Generation

Troubleshooting

There are 4 Adjustments available on the Switch Mode Power Supply Board and one on the PFC Supply Board.SMPS Board1) VR8401 VA Adjust used for the Vertical Grid Drive2) VR8501 VS Adjust used for the Horizontal Grid Drive3) VR8802 5VDC Adjust used for developing Drive Signals4) VR8801 3.4V Adjust used for Control Signal Development ( Factory Adjusted )PFC Board1) VR801 380V Adjust for PFC use AC Ground (use GND PIN of P803A)


AC INPUT

CIRCUIT

PFC Supply

SMPS

STBYB+

Source

AC

PFC SOURCE

Relays

AC

STBYSupply

160V STB

20V STB

PFC B+ 110VDC

18V Source380V

Source

380V 18V

AC

Relay Drive

5V, AC-ONTo Micro

VA Source

VS SourceLow Voltage Source19V, 12V, 6V, 3.4V

5VDC Source

VA

VS

5V

AC/DC SUPPLY

Block Diagram 60PC1D Power Supply First Generation Troubleshooting

P-CTL , VS ON And POD from

the Micro

POD, VSON,and Rush


AC/DC Power Supply Board AC Input

P801

P8015A P8016A

P8017A

Relay Drive 20V and 160VSupply for PFC

Supplies Approx. 20V and 160V to the Standby Power Supply and Approx. 110V to the PFC SupplyReceives 12V for Relays RL8301 and RL8302

Troubleshooting


StandbyPower Supply PFC Power Supply

Troubleshooting

Relay DrivePFC Supply

Input

PFC Supply OutputPower Control

P803A

P801

P8016B

P804A

P801A

P8015B

PFC Receives 110V from the AC/DC Supply and sends 380V and 18V to the

Switch Mode Power Supply. VR801 is a 380V PFC Adjust.Standby Supply receives approx 20V and 160V and

outputs 12V, AC Detect, and 5V ST.

VR801


Switch Mode Power Supply Board TroubleshootingVA

VR8401VS

VR8501

3.4V VR8801

5VDCVR8802

380V 18V

VA

VS

5V

P8011

P8012

P800B

P101BP803B

3.4VPin 7


60PC1D Power Supplies Troubleshooting

AC Power inputs to the AC/DC Supply which is responsible for supplying 160V and 20Vto the Standby Power Supply. The Standby Power Supply develops 5V ST and AC DETwhich is sent to the Main Board to control the power up and down functions. The StandbySupply also develops 12V needed to drive the Relays which switch the AC Power on and off.

Until now the set is turned off and the set is waiting for the on command from the Main Board.The Customer turns on the set and the Main Board reacts as long as the AC/DC Supply and Standby Supply are functioning normal. The next step is for the P-CTL line to go high which causes the Relays to close. The AC/DC Board will output 110VDC to the PFC Board developing the 380VDC and 18VDC lines which power up the SMPS Board and at this point the 19V ( must be measured from Audio Ground ) 12V, 6V, and 3.4V are now present.

Finally, to bring the set to full Power On we need the Main Board to output a high on the VS ON and POD Lines. VS ON is responsible for developing VS and VA voltages and POD is responsible for 5VDC.


This Troubleshooting Procedure relates to the Power Supply used in the 60PC1D Generation 1Plasma Display Panel. This explanation will assist the technician in confirming the normal operation of the Power Supply without the need to substitute the circuit boards. The condition of all four Supplies, the AC/DC Supply, the Standby Power Supply, the PFC ( Pulse Frequency Coefficient ) Supply and the Switch Mode Power Supply can be determined and confirmed.

60PC1D Power Supply Troubleshooting

Step 1 Remove the Power Supply boards from the unit and place in the service position, connect boards as shown on page 40. Place ( 2 ) 60 Watt light bulbs in series across Pins 1 and 6 of connector P8011 ( VS to GND ).

Step 2 Apply AC Power to connector P801. Check for the presence of 5V ST ( Pin 3 ), AC Detect ( Pin 1 ) at connector P801A, and 12V at all three pins of connector P8015A measured from Chassis GND. If the voltage is present disconnect AC Power and proceed to step three.

Step 3 Connect 100 Ohm ¼ Watt Resistor from ST 5V ( Pin3 ) to P CTL ( Pin 2 ) on connector P801A. Apply AC Powerat this time the AC Relays will close and the 380V ( PFC ) and 18 V Supplies will be present at P803A

use AC Ground for this check. Check for 19V ( Use Audio Ground ),12V, 6V, and 3.4V ( use signal Ground ) on connectors P800B and P101B. If present disconnect AC Power and proceed to step four.

Step 4 Connect 100 Ohm ¼ Watt Resistor from 5V ST ( Pin 3 ) to VS ON ( Pin 5 ) on connector P801A. The Lamps placed across P8011 should now light indicating the presence of VS voltage. VA voltage

can be measured from Pin 10 to Pin 6 of connector P8011 at this time. If present disconnect AC Power and proceed to step five.

Step 5 Connect 100 Ohm ¼ Watt Resistor from 5V ST ( Pin 3 ) to POD ( Pin 7 ) on connector P801A. At this time the5VDC Supply at connector P8012 should be present and the Power Supply fully operational.

For Failure of the below steps see page 42See Page 40 for resistor placement


+

Troubleshooting60PC1D Power Supply Generation 1

ACINPUT

Switch ModePower Supply

PFCPower Supply

AC/DCPower Supply

P8011

P804A

P8012

P800B

P101B

P804B

P801A

P8015B

StandbyPower Supply

AC - ON

P - CTL

ST – 5V

GND

VS-ON

5V - MT

POD

P8016B

P8016AResistors 100 Ohms ¼ Watt

P8017A

P8015A

P801

P803B

P803A

P8017B

P801A

( 2 ) 60WLight bulbs

VS

GND


Troubleshooting60PC1D Power Supply Generation 1

PCTL

VSON

POD

Wired for Troubleshooting as shown on Page 40 the switches were added for illustrating the power on sequence


60PC1D Power Supply Troubleshooting

Power On Sequence

• With AC Power applied only, the AC/DC Supply will develop 20V and 160V at P8016A to the Standby Supply.Failure to produce these voltages indicates a problem with either the AC/DC Supply Board or the AC Filter. Check the AC Input at P801.

• The Standby Power Supply outputs 12 Volts used for AC Relay operation at connector P8015B and 5 Volts Standby and AC Detect at P801A and is sent to the Micro Processor circuit for Power On and Control Functions.Failure of the 12 Volt Supply, 5 Volt Standby and AC Detect indicates a failure of the Standby Power Supply.

• The Micro Processor supplies a high to P-CTL Pin 2 of connector P801A causing the AC Relays to close on theAC/DC Board and develops 110 Volt DC at P8017A which is applied to the PFC Board turning on the 380 VoltPFC Supply and the 18 Volt Supply on the PFC Supply Board. These voltages are then used to develop the 19v, 12v,6v, and 3.3v supplies. Failure of the Relays to close could be caused by a loss of “ON” Command fromthe Micro Processor on the Main Board or a Standby circuit failure. Relay operation indicates an active processor circuit and Standby Circuit. Check for approximately 110 volts at P8017A if missing suspect the AC/DC Board ifpresent and the 380 Volt and or the 18 Volt lines are missing suspect the PFC Supply. Presence of the PFC and 18 Volt lines and no output would indicate a failure of the SMPS.

Remember to always check the resistance for possible shorts if you are missing a voltage

• The next step is to have the Micro Processor bring the unit into full power on mode, this is accomplished in 2 ways by first bringing the VS ON ( Pin 5 ) of connector P801A high in order to develop the VS ( Pin1 ) and VA ( Pin 10 ) on connector P8011, second bringing the POD ( Pin 7 ) of connector P801A high to develop the 5VDC at connectorP8012. Failure to develop VS, VA, and 5VDC, if the control lines are high, suspect the SMPS Board as the problem.Make sure you remember to check each resistance load for possible shorts if the voltage was missing!


60PC1D Power Supply Resistance Measurements Boards Disconnected All resistance measurements are approximations.

Troubleshooting

AC/DC Power Supply

P8016A

P801A

P8017A

P8015A

30 Meg PFC B+ (+) PFC B- (-)

480K

269 Rush ctrl (+) 12V (-)270 Power ctrl (+) 12V (-)Reversed same readings

8 Meg ST-BY B+ (+) ST-BY B- (-)Inf.∞ AC-DET (+) ST-BY B- (-)

PFC Power Supply / Standby Power Supply

P8017B 500K PFC B+ (+) PFC B- (-)

P8016B 8 Meg ST-BY B+ (+) ST-BY B- (-)148K AC - DET (+) ST-BY B- (-)

P8015B Inf. Rush ctrl (+) 12V (-)Inf. Power ctrl (+) 12V (-)3.4 Meg 12V (+) Rush ctrl (-)3.4 Meg 12V (+) Rush ctrl (-)

P803A 5 Meg PFC+ (+) GND (-)1K 18V (+) GND (-)

P804A Inf. 5V MNT (+) GND (-)Inf. POD (+) GND (-)57K Rush (+) GND (-)Inf. VSON (+) GND (-)

P801A 1K* AC ON (+) GND(-)20K P-CTL (+) GND (-)1K* ST 5V (+) GND(-)Inf. VSON (+) GND(-)Inf. 5V MNT (+) GND (-)Inf. POD (+) GND (-)


60PC1D Power Supply Resistance Measurements Boards Disconnected All resistance measurements are approximations.

Troubleshooting

Switch Mode Power Supply

P803B 3 MEG* PFC+ (+) GN (-)286K 18V (+) GN (-)

P804B 10K 5VMONI (+) GND (-)3 MEG* POD (+) GND (-)4.9 MEG Rush (+) GND (-)4.3 MEG VSON (+) GND (-)

P101B 12 MEG* 19V (+) GND (-)2K* 6V (+) GND (-)

24 3.4V (+) GND (-)3 MEG* 12V (+) GND (-)

P800B 24 3.4V (+) GND (-)2K* 6V (+) GND (-)3 MEG* 12V (+) GND (-)

P8012 360 5V (+) GND (-)

P80115 MEG* VS (+) GND (-)5K* VA (+) GND (-)


• Adjustments• DC Voltage and Waveform Checks• Resistance Measurements

Y SUS Operating Voltages

Voltages Supplied from SMPS VA VS 5VDC

Y SUS Developed VSC 115v.-VY -196v.IPM 18v.ER IPMSUS IPMRamp UPV SET DNV SET UP

Troubleshooting

This Section of the Presentation will cover troubleshooting the Y SUS Board for the 60PC1D Dual Scan Plasma Display. Upon completion of this Section the technician will have a betterunderstanding of the operation of the circuit and will be able to locate voltage andresistance test points needed for troubleshooting and alignments.

60PC1D Y SUS Board


60PC1D Y SUS Board Troubleshooting

V Set Down

Ramp Up

V SET UP

-VY

VSC

Scope Test Point

VSC Test Point

Floating Ground ( Used for VSC Adjust)

-VY Test PointUse Chassis Ground

V Set UP Test Points

R13718VIPM


60PC1D Y SUS Board Block Diagram Troubleshooting

VS

VSC -VY

V SETUP

Logic SignalsFrom Control

Board

5VDC

VA

IC7SUS IPM

Y DRIVEOUTPUTCIRCUIT

Q16

Out to theControl Board

VS

VS

5V

5V

18v IPM

18v IPM

ER_10

R137

Sus out

ER High

ER Low

ER UpER Down

Sus upSus Down

IC2ER IPM

Switching FET’s

FS2FL1

FS1

FS3

P6

P5

P1

P2

P3

P4

P7

P10

P8

Y Drive

Bottom Left X Board

Z SUS Board

Power Supply

Power SupplyY Drive

Y Drive

GND


B12

10v

GN

D2

0 vG

ND

35.

1 v5V

4

0N

C5

6 0v

VA

P7

119

3vV

S1

0G

ND

10

11.

5 v1

5.0v

10

GN

D1

0G

ND

219

3vV

S2

0G

ND

20

2.4

3v2

5.0v

20

GN

D2

0G

ND

319

3vV

S3

5 .2v

5 V3

03

03

03

4.8v

5V3

4 .8v

5 V4

0G

ND

45.

2v5V

40

40

40

40

NC

40

NC

50

GN

D5

5v5

05

05

59.8

vV

A5

5 9.8

vVA

60

GN

D6

5v6

06

07

60v

VA

75v

70

70

860

vV

A8

5v8

08

.2v

90

95 9

.9v

100

1059

.9v

110

111 9

3.1v

124 .

6v1 2

193 .

1v1 3

1.9 v

140

1 52.

6v

P7

P4

P5

P1

P2

P3

P6

60PC1D Y-SUSTest Point and Voltage Chart

Troubleshooting


Troubleshooting60PC1D Y SUS Board

P4 Logic Signals input from the Control Board

VS

VA

5VDC Output for Control BoardPins 1 thru 4

SUS IPMIC7

ER IPMIC2

P7

P10

P3

P1

P2 5VDC

P6 P5

Scope WaveformTest Point

5V and VA to Bottom Left X Board

VS, VA, and 5V to Z BoardVA, 5V Left Top X Board

Floating Ground

Floating Ground

Y Drive Output

P8


Important Note• The following voltages and waveforms should be adjusted in the order they are presented. • Always adjust the DC levels before the waveform adjustments to most accurately set the Plasma

Display Panel.

Troubleshooting

3 Voltmeter Adjustments to Y SUS• VSC Control VR3 110 Volts used to shape the Y Drive waveform by setting the V Scan level.

Measured at the VSC test points R60 and Floating Ground.• -VY Control VR4 - 65 Volts used to shape the Y Drive waveform by setting the negative

excursion of the Drive Signal.

Check VSC Check -VY

60PC1D Y SUS Board

Measured at (left side) of Resistor R181 to Chassis Ground.

Panel Adjustments

Meter Adjustments continued on next page



Check V SET UP

• V SET UP Control VR20 250VDC adjustment measured across resistors R51 and R192 which setsthe Amplitude of the top portion of the Drive Waveform.

Voltmeter Adjustments Y SUS Board ( Continued )

Panel Adjustments


Troubleshooting

60PC1D Y SUS Board

2 Waveform Adjustments for the Y SUS Board

Panel Adjustments

RAMP UP Control VR1

V SET DOWN Control VR2

There are two waveform adjustments that will require the use of the oscilloscope to properly adjust. VR1 RAMP UPis the first control, and VR2 V SET DOWN is the second. Scope connection will be made at B41 and Chassis Ground.

The Ramp Up Adjustment will correct the pitch of the Top Ramp. Failure to properly alignthis adjustment will result in misfiring Pixels.

The V SET DOWN Adjustment will correct the pitch of the Bottom Ramp. Failure toProperly align this adjustment will result in misfiring Pixels.


Y SUS

60PC1D Panel Waveform Adjustment

Z SUS

Y SUS

Y SUS

Troubleshooting


All of the center washes out due to decreased Vset_DN time.NOTE: this can create a no pix condition, but audio is present.

The center begins to wash out and arc due to decreased Vset_DN time.

Vset_DN too low

Vset_DN too high

60PC1D Y SUS BoardPanel Waveform Adjustment

Troubleshooting


The center begins to wash out and ark due to -VYrunning to long and clipping.

Colors and the image will bloom slightly and the unitwill have difficulty with clean frame changes in a quicklyaltering image.

-VY too low

-VY too high


Troubleshooting


VSC too low

VSC too high

The image will show very little change but there willBe some distortion in a quickly changing image.

The image will show very little change but there willBe some distortion in a quickly changing image.


Troubleshooting


Generates Vsc, -Vy and V Set Upfrom Vs by transformer

Control Board

Diagram of Y Sustain Board

IPM’s generate Sustain Waveform

Troubleshooting

Distributes 5v VA VS Distributes 5v

Logic signals needed to

generate drive waveform

Distributes 5v VA

Receive 5V,Va, Vsfrom SMPS

Transfer Waveformto Y Drive Board

Z SUS Board

Top and Bottom Center and Left X Boards

Display Panel

Power Supply Board - SMPS

FETs amplify Sustain Waveform

60PC1D Y SUS Board


IPM ( Intelligent Power Module )

There are two IPMs used in 60PC1D on the Y Sustain Board.1. SUS IPM ( IC7 )

2. ER IPM ( IC2 )

Role of IPMs on the Y SUS Board1. Generate Sustain Waveform ( square wave ) – SUS IPM.

2. Energy Recovery Function ( for saving power ) – ER IPM.

SUS_DNSUS_DN

SUS_UP

ER_UP ER_DN



Forward Diode Test : 1. GND (＋), Sus-out ( - ) 2. Sus-out (＋), Vs ( - )3. ER_ DN ( - ), GRND (＋)4. GRND ( + ), ER-UP ( - )5. 18v ( - ), ER GRND ( + ) 6. 5v ( - ), ER GRND ( + )

Reverse Diode Test : 1. GND ( - ), Sus-out (＋) 2. Sus-out ( - ), Vs (＋)3. ER-DN (＋), GRND ( - ) 0.994. GRND ( - ), ER-UP ( + ) 0.995. 18v ( + ), GRND ( - ) 1.36. 5v ( + ), GRND ( - ) 0.9

Note: ER_HIGH ER_LOW, to ER_lO OPEN in Diode Check

How to check IPM (Resistance ‘Diode Check’, board removed from set)


Test Points referenced from the silk screenfound on the bottom of the PC Board.


60 PC1D Y Drive Boards

Troubleshooting

This Section of the Presentation will cover troubleshooting the Y Drive Boards for the 60PC1D Dual Scan Plasma Display. Upon completion of this Section the technician will have a better understanding of the operation of the circuits and will be able to locate voltage and resistance test points needed for troubleshooting.


VH

GND

HVO

Y-Drive Board works as a path supplying Sustain waveform and Reset waveform which are made in Y SUSTAIN B/D and sent to the Panel through SCAN DRIVER IC’s.

The Y Drive Boards supply a waveform which selects the horizontal electrodes sequentially.

* 60PC1DR uses 12 DRIVER ICs on 2 Boards (TOP, BOTTOM: 6 each)

60PC1D Y Drive Boards

Troubleshooting

Bottom Drive Board



Troubleshooting

To remove the Ribbon cable from the connector first carefully lift the Locking Tab fromthe back and tilt it forward ( lift from the outside edge as shown in Fig 1). Gently slide the

Ribbon Cable free from the connector.

Fig 1

To reinstall the Ribbon Cable carefully slide it back into the slot see ( Fig 2 ), be sure it is seated securely and press the Locking Tab back to the locked position see ( Fig 3).

Fig 2 Fig 3


Troubleshooting


Floating GroundBottom Drive Board Y Drive Signalinput

P16 P19 P20 P21 P6 P7

P1

15 Volts at Connector P1 ( Pins 2 and 3 ) must be measured with relation to Floating Ground measuring from the wrong ground will result in an erroneous reading.

P3 Floating Ground

Q504

Q505

Q506

Q507


Incoming Logic Signalsand 15V Supply

Floating Ground Incoming Drive Signal

60PC1D Y drive Board Block Diagram

Bottom Y Drive Board

Troubleshooting

Q506Q507 Q505 Q504 IC2IC15

P1

P3

IC11IC14IC12IC25IC27 IC13

P16 P19 P20 P21 P6 P7

15V


This Section of the Presentation will cover troubleshooting the Z-SUS Board Assembly. Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and resistance test points needed for troubleshooting and alignment.

• DC Voltage and Waveform Test Points• Z BIAS Alignment• Resistance Test Points

Operating Voltages Y SUS Supplied VA 60v.VS 196v.

5v.

Developed on Z SUS Z Bias 165vSUS_IPM ER_IPMIPM 18v

Troubleshooting60PC1D Z SUS Board


Input Voltages from the Y SUS Board

VS VS is supplied to IC7 and the SUS_IPM through coil FL5 and to the primary winding of transformer T3 to the Z Bias Circuit. Input voltage measurement is made from connector P12 pins 11 and 12, to chassis ground.

VA VA is supplied to the ER_HIGH IPM through resistor R10 and diode D18. VA voltage is alsorouted to connectors P1 pin 5 and P9 pin 5 for the right top and bottom X driver boards.

5v 5v is used to Bias the circuits on the Z_ SUS Board. 5v also feeds connectors P1 pin 3 and P9pin 3 for the right top and bottom X boards.

Voltages Developed on the Z SUS BoardZ Bias 165v is used to Bias the output circuits driving the Sustain and Erase Pulses, removing previous images

from the PDP. Z-bias is measured from the Vzb TP on the Z SUS Board and adjusted by VR3

IPM 18v IPM 18V needed to generate the Sustain and Erase pulses in the IPMs. Measured at positive side of CapacitorC18 ( Located between the IPMs IC7 and IC3 ).



10

GN

D1

01

0G

ND

15.

0v2

0G

ND

2.3

v2

0G

ND

25.

0v3

5v5V

3.3

v3

5v5+

30

40

NC

4.4

8v4

0N

C4

05

59.5

vV

A5

05

60.0

vV

A5

06

06

07

07

08

3.0v

8.2

v9

09

59.9

v10

1.85

v10

59.9

v11

011

193v

120

1219

3v

P9

P1

P2

P12

10v

GN

D2

0vG

ND

35.

1v5V

4

0N

C5

60v

VA

P1

10v

GN

D2

0vG

ND

35.

1v5V

4

0N

C5

60v

VA

P9

IC7

SUS-

IPM

IC2

ER-IP

M

P9

P1P1

2

P3 P5 P6

P2Pi

n 1

= TP

134

–14

5.

Z_SU

S TP

179

TP 0

– Y

&Z S

US

in

sync

Z-BI

AS



60PC1D Z SUSTAIN Board

IC3 ER-IPM IC7 SUS-IPM Vzb Z BIAS TP

Z BIAS Adjust Control

SUS signal TP (B11)

Timing, Data, and control signals

Troubleshooting

P9VA5VGNDGND

VS, VA, and 5V in from the Y SUS Board


ZBIAS adjustment: On the Z-Sustain PCBWith the DVM connected to Vzb reference to chassis ground adjust the potentiometer till the DVMreads 93 vdc.

DVM

60PC1D Z SUSTAIN Board Troubleshooting

+

-


60PC1D Waveforms for Z SUSTAIN Board

Input Signals to the Z SUS Board at P2 come from the Control Board and passthrough the Top Center, and Right X Drive PWBs. Connector P2 feeds theInput Signals to IC1 and IC24 which drive the IPMs. These Signals are used to develop the Z SUS Drive Waveform to drive the PDP Display.

Troubleshooting


NOTE: These voltages will vary due to changes in design and variations in the PDP panel.

60PC1D Z SUS BoardWaveform inputs from the Control Board

Troubleshooting

TP144TP134

TP135

TP136

TP137

TP138

TP140

TP141

TP142

TP143

TP145


ER_IPM

L1

L2

L3

SUS_IPM

P2

ER_LOW

ER_IO

ER_HIGH

GndER-UPER-DN

Gnd18VDC

GndSUS_DN

SUS_UP

Gnd18VDC

Chassi GND

SUS_OUT

VS

5VDC

18V IPM

P1

P12

IC1, IC24

P9

5VDC VAVA 5VDC

R42

5VDC VA

Z Bias Circuit

Z Bias Control VR3

Q16, Q18

D9

D10

D17

P6

To PDP

Output Waveform TP

To PDP

To PDPVS

P5

P3

Logic from the Control PCB.

D8

Z95V

95V Vs

VsZ95V

95V Vs

VsZ95V

95V Vs

Vs

B11

60PC1D Z SUSBlock Diagram

+ C18


60PC1D Z SUSTAIN Board

Provides the SUSTAIN PULSE and ERASE PULSE for generating

SUSTAIN discharge in the panel by receiving LOGIC signals from

the CONTROL B/D.

This waveform is supplied to the panel through FPC (Flexible Printed Circuit (Z).

< Probe connect point to Oscilloscope to check Z wave form >

Troubleshooting

Z DRIVE Waveform Z

95V

95V Vs

Vs


60PC1D Z SUSTAIN BOARD

X Board Right Top and Bottom

Distribute 5v, VA

IPM generates erase,sustain waveforms

Generates Z Bias18v IPM Vcc

Distributes Logic Signals

Distributes 5v, VA, VS

FET Makes Drive waveform Display PanelVia FPC (flexible printed circuit )

Troubleshooting

Control Board Receive 5v, VA, VS

Y SUS Board


Z SUS IPM (Intelligent Power Module)

There are Two IPMs( Intelligent Power Modules) on the Z sustain board

One is SUS IPM (IC7) , another is ER IPM (IC3)

Role of the IPMs

1. Generate sustain and erase waveform ( square wave ) – SUS IPM.

2.Energy recovery function ( for saving power ) – ER IPM.

SUS_DNSUS_DN

SUS_UP

ER_UP ER_DN

Z95V

95V Vs

Vs

Troubleshooting


Defect display

Dark displayIPM Fail

If the cable was not connected,

There is no display

P2 Cable connection

PartDescription of defectDefect name

< Dark display >

▶ Major defect : IPM fail, cable connection.

< No display >

Troubleshooting


Pull out Lock as shown in circles Pull Lock apart to remove Pull FPC Connector as shown in arrow.

FPC (Flexible Printed Circuit) Removal for Z Board Replacement Troubleshooting

Resistance Measurements ( use any PCB mounting screw for Ground )

*Measurements made with the board disconnectednegative lead of the meter to ground.

• VS 6 meg• VA 5 meg• 5v 3.3 meg• B11 to Chassis Ground 5 meg• Chassis Ground to SUS_OUT 4 meg• SUS_OUT to VS 2.7 meg• ER low to ER 10 4.9 meg• ER 10 to ER High 2.7 meg• 18v to Chassis Ground 7.9K• SUS_UP to Chassis Ground 10K• SUS_DN to Chassis Ground 1.3meg• ER_UP to Chassis Ground 10K• ER_DN to Chassis Ground 10K


This Section of the Presentation will cover the Control Board for the 60PC1D Dual Scan Plasma Display Panel. Upon completion of this section the Technician should have a better understanding of the Circuit and be able to locate Test Points

and Voltages necessary for troubleshooting.

Troubleshooting

60PC1D Control Board


Pin 1 Pin 2 Pin 3IC24 5.0v 2.4v 0IC42 5.0v 1.7v 0IC44 5.0v 3.2v 0IC45 5.0v 3.2v 0IC46 5.0v 3.2v 0

P200

P300P101 P102 P103

P104 P105 P106

D30

IC45

P3

P4 P1

D33

D32

D31

TP1

TP19

D2

D1

R1Out 00 – 13TP 39 - 52

G1Out 00 – 13TP 53 - 66

B1Out 00 – 13TP 67 - 80

R2Out 00 – 13TP 81 - 94

G2Out 00 – 13TP 95 - 108

B2Out 00 – 13TP 109 - 122

Addr_STB – TP 131Mis_Flag_Out – TP 130VS-DA – TP 129Blank_DA – TP 128RAS_Data1 – TP 127RAS_Data2 – TP 126RAS_STB1 – TP 125*Solder filled TP – TP 124RAS_STB2 – TP 123

TP148- TP177

IC42

IC46

IC44 IC24

60PC1D Control BoardTest Points and Voltage Distribution


Temperature Sensor

Temperaturediode

◆. In charge of all signal process and creating ON/OFF order of all FET on

DRIVER B/D by receiving 8 bit R, G, B input.

◆. Power : 3.3V/5VTemperature display diode can be checked.Left picture shows 7 periodswhich means normal temperatureGreen = OFFYellow = ON

D15 - 8 Weight

D16 - 4D17 - 2D18 - 1

Voltage Regulator

MCM(MicroControlModule)

TroubleshootingCONTROL Board

TEST PatternAUTOGEN P4 Connector

LG Part Number Label

Voltage Regulator


LVDS Connector

Remove LVDS Cable and short pins 1 and 2 of connector P4 to display test patterns.

If patterns are not present, Control

board is defective

LVDSpoor connection

Defect display

Regular vertical linesCONTROL IC

No pictureOscilator

No display orPartly no display

Connector

PartDescription of defectDefect part

▶ Main Defect : MCM , connector, oscilator, LVDS poor connection

▶ Voltage used : 3.3V/3.3V/3.3V/2.4V/1.8V(5 separate operating voltages).

< MCM >

< Connector >

< Oscillator >

< Partly no display >

< Poor connection >

60PC1D Control Board

< Display Lines >

Replace Control Board

Reseat Control Board Connectors

Replace Control Board

ReconnectLVDS or Replace Control Board

Solution

Troubleshooting


LGDP 4012H IC3

MCM

TCP TCPTCP

16 line

Array

192 Lines output

Diagram of Control Board

Control Board to X Board Address Signal Flow

This will show Signal Flow Distribution to help determine the failed part depending on where the failure is on the screen.

The Control Board supplies the Video Signal to the TCP ICs. If there is a bar defect on the screen, it could be a Control Board problem.

16 line

Troubleshooting

MCM

Array


60PC1D X Drive Boards

Troubleshooting

This section of the Presentation will cover the X Drive Boards. Upon completion the Technician will have a better understanding of the Circuits which make up X Drive and will be able to locate all the voltage test points.

The X Drive Boards consist of 3 Top and 3 Bottom Boards which are all similar in operation, therefore the Top Center Board will be considered here.

Outputs from all the X Boards drive TCP ICs ( Tape Carrier Package ) located onthe Ribbon Cable which goes into both the top and bottom of the Display Panel.


Voltages Supplied to the X Boards

60PC1D X Drive Board

Troubleshooting

• VA The Z SUS Board supplies both the Right Topand Bottom X Boards.

• VA The Y SUS Board supplies both the Left Top and Bottom, and the Center Top and Bottom X Boards.

• 5v The Z SUS Board supplies the Right Top and Bottom X Boards.

• 5v The Y SUS Board supplies the Left Top and Bottom, and the Center Top and Bottom X Boards.


TCP (Tape Carrier Package)

TCP IC

Front side Behind side

Supplies RGB 6bit signal to the PDP by connecting the PAD Electrode of the PANEL with the X Board.

<IC Defect>

Frame X_B/D

Front panel

TCP

Rear panel

Connector

Troubleshooting


Top Center X Drive Board

5V,VA from Top Left X Board

60PC1D X Drive BoardsTroubleshooting

RGB Logic SignalsFor the Top Center and Right

X Boards are suppliedfrom the Control Board

Logic Signals for the Z Sus Board are also Supplied here

Out to the TCP ICs

RGB Logic SignalsFor the Right Top X Board and

Z SUS Logic Signals


Troubleshooting

Output to TCP IC

1 50

1

NC

VA (7,8,9) 15 Thru 24

25-28

Grnd

29 Thru 36

45,46

NC

VA (42,43,44)

37 Thru 39 Grnd

Connections on Connector P205

60PC1D Center Top X Board

RGB Logic Signals RGB Logic Signals

B203VA

GND ( 2,3,4)

5,6NC

10,11NC

12,13,14Ground

40, 41NC

47,48,49Ground

NC


60PC1D Center Top X BoardTroubleshooting

RGB LOGIC SIGNAL INPUTS to IC201, IC202,

and IC203 output to TCP ICs

P208 P207 P206 P205 P204 P203 P202 P201

P209 P210

P212

VA

D201D202D203D204

P211

Logic SignalsOutput to Right Top X Board

and the Z SUS Board

R254R255R256R257

R250R251R252R253

R246R247R248R249

R242R243R244R245

B204

B203 B202 B201

IC201 IC202 IC203

C209

FS201

FL2015V

OUTPUT to the TCP ICs

To P211


60PC1D Main BoardTroubleshooting

This Section of the Presentation will cover the Main Board. Upon completionthe Technician will have a better understanding of the Signal Sources that are Processed by this Board and the will be able to confirm its operation.

Main Board


Troubleshooting60PC1D Main Board

Antenna / Cable Input

HDMI Inputs RS232

LVDS Signals

S- Video

P4004 P4005 P4003

R Speaker

L Speaker

Fans

Computer InputComponent Inputs

Audio / Video Inputs

Digital Audio

Tuner

BCM3550IC 1001


Side AV V,LR

Rear AV V, LRRear S YC, LR

Side S YC, LRMNT_V_Out

IN1

OUT1IN4IN1

IN4

IN5

OUT3

Comp_1YCbCrComp_2YCbCr

IN3IN4

CVBS

CVBS

ATSC/NTSC Tuner

CableANT.

64-Bit I/F

BCM3560IC1001

12LVDSTransVDEC_CVBS/S_Y

VSB/QAM/NTSC/SIF

SPDIF Out

R/L Output

SPDIF_OUT

Flash Memory16MByte

HDMI/DVI

RS-232C

SDRAM256Mbit X-tal

54MHz

Reset IC

D-class AMP

Sub Micom(MTV416)

Sub Micom(MTV416)

EEPROM

HDMI & ComponentRGB-PC

Audio 부

Tuner부

Comp_1 LRComp_2 LRRGB(Phone) LR AUDIO

ADCAudio R/L I2S

I2S Audio Input

MST3361

R/G/BH/V Sync

DVI Input

Digital Output.

SDRAM256Mbit x2

DDS

Data [24] Hsync/Vsync/DE/Clk2X1

S/W

2X1S/W

HDCP

IIC

TMDS

DDS

SPDIF

Y,C

IF P/N for DTVSIF for NTSC

SIF for NTSC

USB for upgrade S/W

LRMNT_OutAUDIO DAC

IIS

Made by S.B ParkModified by S.K KimDate 2006. 2. 9

TMDS

CXA2069(AV S/W)

Block diagram for CI DTV Troubleshooting

IC6004

IC7004


Video signal path for Composite/S-video/IF

MNT_V_Out

SD_CVBSCXA2069

IC5003

OUT3

Side AV V,LR

Rear AV V, LR

Rear S YC, LR

Side S YC, LR

IN1

IN4

IN1

IN4

IN3

IN4

Comp_1 LR

Comp_2 LRRGB(Phone) LR

BCM3550

SD_Y

SD_C

ANT/ Cable

TV IN

CVBS from TUNER

FMS6400

Y/CVBS

C

OUT1/Y

OUT1/C

M_CVBS/Y

C

M_CVBS

C

Y

LPF for CVBS

SD_CVBS

TUNER

IF_P

IF_N

IF_P from TUNER for DTV

IF_N from TUNER for DTV

Troubleshooting


Video signal path for Component Inputs

Comp1_Y 8(3A)

Comp1_Pb 11(2A)

Comp1_Pr 16(1A)

Comp2_Y 9(3B)

Comp2_Pb 14(2B)

Comp2_Pr 1(1B)

2 12 7SW1 SW2 SW3

6(Out3) Comp_Y

5(Out2) Comp_Pb

3(Out1) Comp_Pr

L

H

8(3A)

11(2A)

16(1A)

RGB_G 9(3B)

RGB_B 14(2B)

RGB_R 1(1B)

2 12 7SW1 SW2 SW3

6(Out3) Y/G to LPF

5(Out2) Pb/B to LPF

3(Out1) Pr/R to LPF

L

H

IC5001

IC5002

Y/G 3(YIN)

Pb/B 5(PBIN)

Pr/R 7(PBIN)

1(EXT_SYNC)

18(SYNC_IN)

16 Comp_Y

15 Comp_Pb

14 Comp_Pr

44(GIN+)43(SOGIN)

41(BIN+)

46(RIN+)

IC704IC4009

RGB_G

H Sync7404V Sync

RGB_BRGB_R

BCM3550

GPIOGPIO for sync selection

HD-DVIData [24]

H sync/V sync/DE/Clock H,V Sync/Clock

RGB_HS

GPIO for sync selection

RGB_HS

RGB_VS

RGB_HSRGB_VS

GPIOGPIO for Component

GPIOGPIO for Component

GPIO for Component

GPIO for Component

IC1001FMS6407 MST3361

MM1731

MM1732

DATA_OUTH/V/DE/CLK

Troubleshooting


Video signal path for HDMI Inputs

IC704BCM3550

GPIOGPIO for Interrupt

HD-DVIData [0: 23]

H sync/V sync/DE/Clock H,V Sync/Clock

GPIOGPIO for Power detection

GPIO

GPIO for Hot plug detection

IC1001

MST3361

TMDS1 RX0+/-TMDS1 RX1+/-TMDS1 RX2+/-TMDS1 RX3+/-

DDC SDA1

DDC SCL1EEPROMFor EDID

DDC SDA1

DDC SCL1

TMDS1INPUT

DDC1INPUT

TMDS2 RX0+/-TMDS2 RX1+/-TMDS2 RX2+/-TMDS2 RX3+/-

DDC SDA2

DDC SCL2EEPROMFor EDID

DDC SDA2

DDC SCL2

TMDS2INPUT

DDC2INPUT

HDCP SDA

HDCP SCLEEPROMFor HDCP

NDA

NCL

INT

DATA_OUT

H,V Sync/DE/Clock

HDMI 1

HDMI 2

Troubleshooting


SIF from TUNER

CXA2069

Side AV V,LR

Rear AV V, LRRear S YC, LR

Side S YC, LR

IN1

IN4IN1

IN4

IN3

IN4Comp_1 LR

Comp_2 LRRGB(Phone) LR

OUT1/R

OUT1/L

ANT/ Cable

TUNER

AUDIO ADC(CS5331)

Audio R I2S_SCK_IN

Audio L

BCM3550

SIF

I2S_LRCH_IN

I2S_LRCK_IN

I2S_SCK_IN

I2S_LRCH_IN

I2S_LRCK_IN

SPDIF_IN_P SPDIF from MST3361

_RMNT_OutAUDIO DAC

(CS4344)

I2S_SCK_OUT

I2S_LRCH_OUT

I2S_LRCK_OUT

I2S_SCK_OUT

I2S_LRCH_OUT

I2S_LRCK_OUT

_LMNT_Out

Analog L_OUTAudioAMP

(TPA3100)

SPDIF Out SPDIF_OUT_P

AUD_LEFT_P

AUD_LEFT_N

AUD_RIGHT_N

AUD_RIGHT_P

SPK_L_P

SPK_L_N

SPK_R_N

SPK_R_PAnalog R_OUT

MC3307(OP-AMP)

Audio signal path Block Diagram

IF_P from TUNER for DTV

IF_N from TUNER for DTVIF_PIF_N

Troubleshooting


“No raster” in details

CASE 1. No Picture (Sound Ok)

(1) To check LED light on the CTRL B/D

(2) To Check input cable from power to signal and CTRL B/D

(3) To check connection from power to X_B/D, Y B/D, Z B/D

(4) To check connection from CTRL B/D to X B/D, Y B/D, Z B/D

(5) To check fuse on Y, Z B/D and IPM

(6) Examine Scan IC’s


Replace CTRLRegular vertical lines on R/G/B

Replace CTRLRegular vertical lines

Replace CTRLRegular vertical lines

Causedefects descriptionpicture

MCM defect on CTRL B/D


Replace CTRLColor spread on R/G/B

Replace CTRLor X Drive PCB

Vertical bar on R /G/B (Open)


Vertical bar on R/G/B (short)




Replace CTRLVertical Lines Copied

Replace CTRLDistortion

Replace CTRLAbnormal on Top or Bottom screen (only for Dual Scan

model)




Replace CTRLData Noise

Replace CTRLor X Drive PCBA vertical line from bottom

(4005A MCM model)


A vertical line from top(only for 4005A MCM model)




Check power to and on the control PCB if ok replace CTRL B/D

Abnormal display

Check power to and on the control PCB if ok replace CTRL B/D

To check cable connection on the control and X PCB’s

Replace CTRL B/D

Cause

raining

Full or partly No image

picturePhenomenonFailure parts

Related CTRL B/D defects

MCM

Connector

Oscillator

Connector

No LED light


Y-SUS B/D & Y-DRV

To replace Y-SUS or X drive PCB

Check signal and voltage on Y-SUS and Y-DRV if ok replace Y-SUS and/or Y-DRV.*Disconnect each Y_DRV PCB one at a time and retest unit.*Check supply to X boards.

Y-SUS

To replace Y-SUS

To replace Y-SUSor Y-DRV

Cause

Y-SUS

Y-SUS(abnormal display)

Y-SUS

Check signal and voltage on Y-SUS and Y-DRV if ok replace Y-SUS and/or Y-DRV.*Disconnect each Y_DRV PCB one at a time and retest unit.

Y-SUS & Y-DRV

defects descriptionpicturefailure


To replace Y-DRV

Abnormal picture*Disconnect each Y-

DRV PCB one at a time and retest unit.

Y-DRV

Re seat connectors

To replace Y-DRV

Replace Y-DRV

Causedefects parts

Abnormal display(connections

between Y-DRV and Y-SUS)

connector

Abnormal picture*Disconnect each Y-

DRV PCB one at a time and retest unit.

Y-DRV

Horizontal bar*Disconnect each Y-DRV PCB one at a time and retest unit.

Y-DRV


Y-DRV


Replace CTRL b/d

To replace X-B/D after checking cable and

connection

Replace Z-SUS

Cause

Many vertical lines

Partly abnormal display

Dark Picture*Check for supply

voltages and Y-SUS, Z-SUS waveforms.

CTRL

X_B/D

Z-SUS


Z-SUS & others


▣ Y-DRV defects

Pic. 1.

▣ Scan IC defects

1. To fixed up (-) Probe like Pic.22. To sweep (+) Probe on the connector like Pic. 3. 3. If there are short between GND and a pin, it is failure of

the scan ic To replace Y-DRV

Pic 2. Pic. 3.

Pic. 4.

1) Diode value comes 0.4~0.6 Y-DRV OK 2) Less than 0.4, to replace Y-DRV board

Checking method of Y-DRV

Ex>50X3

<Phenomenon>

GND


Checking method of X_B/D

1. No display of ½ screen

1) To check power connector of the X B/D2) To check connectors between CTRL B/D and X B/D3) To replace the X B/D.4) Be sure the connection of TCP after X B/D replacing

※ relation between screen and X B/DScreen X B/Dleft ½ ↔ Right X B/D …… Pic. 1 right ½ ↔ Left X B/D …… Pic. 2

Pic. 1.

Pic. 2.


1. Forward: test 1. GND(＋) , Sus-out(－) test 2. Sus-out(＋),Vs(－)

In each test, the Diode value are over 0.4V OK※ (+) + probe, (-) - probe

2. Reverse : test 1.GND(－) , Sus-out(＋) test2. Sus-out(－),Vs(＋)

In each test, the diode value comes infinity(∞) OK※ (+) + probe, (-) - probe

◎ EX> 42V7 model

Checking method of IPM

Pic. 1.

Pic. 2.(+) Probe Pic. 3.(-) Probe Pic. 4. DMM mode

<Phenomenon>


⑭

①②

⑫

③ ④

⑤

⑥

⑦

⑪

⑧⑨ ⑩

⑬

Ex) 50X3

Connecting between Y drive top and bottom

⑦

Supply waveform on panel for operation

⑥

FET driving signal to make Z waveform

⑪

⑫⑭

5V supply⑬

To supply Va,Vs to Y and Z board

5V,15V for IC and FET driving ⑤

RGB Video signal ②③④

FET driving signal to make the Y waveform

①

Supply Va,5V to X B/D ⑧⑨⑩

RoleCable

Cables roles


Cable defects

The cable between Y-DRV TOP and Y-DRV Bottom.It is for a model of which Y-DRV is separated TOP

and Bottom board.

The cable between Y-SUS and Y-DRV

The cable connection Between Y-SUS,Z-SUS,CTRL B/D and X B/D

Connection defect by CablePhenomenon


60” X-PSU. Characteristics from EAY32961901 & EAY32961801

Input requirements Output Characteristics


VR951 - VS ADJ

P812

10

9

8

7 N.C.

6 GROUND

5 GROUND

4 GROUND

3 GROUND

2

1

VR901 - VA ADJ

P811

1 5V SUPPLY

2 5V SUPPLY

3 GROUND

4 GROUND

P800

13 3.3V_ON_IN

12 N.C.

11 6V

10 N.C.

9 GROUND

8 STBY5V 6 5 4 3 2 1

7 5V_ON_IN

6 5V

5 VS_ON_IN

4 GROUND

3 STBY5V

2 RL_ON

1 AC_ON

12

11

10 9 8 7 6 5 4 3 2 1 4 3 2 1 5 4 3 2 1

VA SUPPLY (60V-ADJ)

VS SUPPLY (190V-ADJ)



VA SUPPLY (60V-ADJ)

3.4

V S

UPP

LY

MU

LTI_

ON

3.4

V_O

N

RL2

RL1

AC

_D

ET

NC

GR

OU

ND

NC

GR

OU

ND

GR

OU

ND

P8

14

_2

AC

NEU

TR

AL

PFCP

81

7_

2

6V

SU

PPLY

12V

SU

PPLY

GR

OU

ND

VC

C1

AC

NEU

TR

AL

AC

LIN

E A

FTER

RL1

02

P8

15

_2

6.5

V S

UPP

LY

6.5

V S

UPP

LY

P8

16

_2

PFC

_D

ET

STB

Y5V

SU

PPLY

Sound S

UPP

LY (

19

AC

LIN

E A

FTER

RL1

02

GR

OU

ND

6.5

V S

UPP

LY

60” X-PSU. Adjustment Points and Distribution of Connectors

X-PSU Main Part (LGE No: EAY32961801)

VA & VS-ADJ have been adjusted against PDP Module Specifications during final assembly process in Plasma TVs’Factory


60” X-PSU. Adjustment Point and Distribution of Connectors

1 2 3 4 5 6 7 8 9 10

11

12 1 2 3 4 5 6 1 2 3 4 5

P802

12 GROUND

11 GROUND

10 12V SUPPLY

9 12V SUPPLY

8 GROUND

7 GROUND

6 6V SUPPLY 4 3 2 1

5 6V SUPPLY

4 GROUND

3 GROUND

2 3.4V SUPPLY

1 3.4V SUPPLY

P803

10 GROUND

9 12V SUPPLY

8 GROUND

7 3.4V SUPPLY

6 GROUND

5 6V SUPPLY

4 GROUND

3 GROUND VR251 - 3.4V ADJ

2 19V (SOUND SUPPLY)

1 19V (SOUND SUPPLY)

AC LINE 1

NC 2

AC NEUTRAL 3

RL1

RL2

3.4

V_O

N

MU

LTI_

ON

AC

NEU

TR

AL

NC

P8

15

_1

GR

OU

ND

12

V S

UPP

LY

6V

SU

PPLY

3.4

V S

UPP

LY

STB

Y5V

SU

PPLY

PFC

_D

ET

AC

_D

ET

AC

NEU

TR

AL

P8

16

_1

6.5

V S

UPPL

Y

6.5

V S

UPPL

Y

6.5

V S

UPPL

Y

P8

14

_1

P813

AC

LIN

E A

FTER

RL1

02

GR

OU

ND

GR

OU

ND

GR

OU

ND

SO

UN

D S

UPP

LY (

19V

)

AC

LIN

E A

FTER

RL1

02

P8

17

_1

VC

C

GR

OU

ND

NC

PFC

X-PSU Sub Part (LGE No: EAY32961901)

3.4V-ADJ has been adjusted and fixed in Power Supplies’Factory


X-PSU Block Diagram. Converters and Regulators

MULTI-OUTPUT

CONVERTER

PFCCONVERTER

VACONVERTER

VSCONVERTER& CURRENT

SENSE CIRCUIT

VA & VSDISCHARGER

19V DISCRETE REG

12VIC REGULATOR

ON/OFFDISCRETE

5VDISCRETE REG

5VIC REGULATOR

3.4VDC/DC

CONVDERTERRECTIFIER

BRIDGE

POWER RELAY(S)

AC INPUT

VCC1

P18V

VCC1

AC_DET

PFC_DET

19V

6.5V

6V

5V

STBY5V

3.4V

12V

VA

VS

VS_OCP

VS_DET

SOUND

12V

6V5V

MULTI_ON

M5V_ON

3.4V_ON

VS_ON

STBY_ON

DISCHARGE

VA_DET

PFC_ON

RL1

RL2

P18V

P18V

3.4V

5V_MNTR750

D125 D130

D126

D601

6.5V

6.5V only 60” X-PSU


AC_DET

PFC_DET

VS_OCP

VS_DET

SOUND

12V

6V

5V

MULTI_ON

M5V_ON

3.4V_ON

VS_ON

STBY_ON

DISCHARGE

VA_DET

PFC_ON

RL1

RL2

3.4V

3.3V_ON_IN

5V_ON_IN

VS_ON_IN

RL_ON

AC_ON

Input 1 12V VS_DET 28 Input

Input 2 3.4V VA_DET 27 Input

Input 3 5V SOUND 26 Input

Input 4 6V STBY_ON 25 Out

VDD 5 VDD VSS 24 GND

Input 6 VS_OCP RESET 23 Input

Out 7 DISCHARGE XOUT 22 Out

Out 8 M5V_ON XIN 21 Input

Out 9 3.4V_ON VS_ON 20 Out

Out 10 MULTI_ON PFC_ON 19 Out

Input 11 3.3V_ON_IN PFC_DET 18 Input

Input 12 5V_ON_IN AC_DET 17 Input

Input 13 VS_ON_IN RL1 16 Out

Input 14 RL_ON AC_ON 15 Out

U701 M

C80F0

308

SignalsFrom/To

Main Chassis

Signals From/ToConverters and Regulators

X-PSU Block Diagram. Micro-controller


60” X-PSU. Main Components by Section

KECLOW DROP OUT REGULATOR; ON/OFF; 12V 2A TO-220ISLDO REGULATORKIA278R12PIU22112V SUPPLY

ROHM5.1V 5MA DO34ZENER DIODEMTZJ5.1BZD280VDD SUPPLY

FAIRCHILDP-CHANNEL -60 V -8.6A OR -60V -17A TO-220FMOSFETFQPF27P06Q201

KECNPN 120V 100MA HFE: 350~ 700 TO92 TRANSISTORKTC3200-BLQ204

ROHM6.8V 5MA DO-34ZENER DIODEMTZJ6.8BZD201

19V SUPPLY

ST MICROELECTRONICS

N-CHANNEL 900V 5.8A TO-220FMOSFETSTP6NK90ZFPQ151

SMART ELECTRONICSINRUSH CURRENT PROTECTOR; 250V-3A00 V-TYPE; 0.16 OHM

FUSING RESISTOR

ICP250-3A00R152

KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU241

NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC201

ON SEMICONDUCTORCURRENT MODE CONTROLLER; FREQ: 100kHz DUTY CYCLE: 50%MAX PDIP-7

CONTROLLERNCP1217AP100GU151

MULTI-OUTPUT

CONVERTER




INFINEONN-CHANNEL 600V 20A TO-247MOSFETSD20N60Q601, Q602,Q603, Q604

ON SEMICONDUCTORPFC CONTROLLER; FIXED FREQUENCY: 67 kHz PDIP-8CONTROLLERNCP1653A U601

PFCCONVERTER

SHINDENGEN600V 25A 6SBRIDGE RECTIFIER

D25XB60D101, D102BRIDGERECTIFIER

ROHMNPN 20V 500MA HFE: 1200 ~ 2700; ROHM: SMT3 EIAJ: SC59

CHIP TRANSISTOR

2SD2114K-WQ701, Q702

DAIICHI250V 16A ; COIL: 5VRELAYDH5D1-O(M)-16ARL101, RL102POWER

RELAY



EPCOS385VRMS 14MM RADIALVARISTORB72214-S2381-K101

VA101

LITTELFUSE15A 250V 5X20MM SLOW-BLO 6.3 X 31.8MMFUSE0326015.MXPF101

AC INPUT

MANUFACTURERDESCRIPTIONCLASSGENERIC NUMBER

LOCATIONSECTION


60” X-PSU. Main Components by Section

ABOV SEMICONDUCTOR

GMS 800 SERIES CMOS 8-BIT; FLASH MEMORY: 8K RAM: 512BYTES I/O-PORTS: 26; 28SKDIP

MICROCONTROLLER

MC80F0308G PU701

MURATACERALOCK; FREQUENCY: 8 MHZ 5% RADIAL 3 PINSRESONATORCSTLS8M00G53-AOX701MICROCONTROLL

ER

FAIRCHILDN-CHANNEL 250V 8.8A OR 250V 15.6A TO-220FMOSFETFQPF9N25C OR FQPF16N25C

Q952

KECNPN 60V 150MA HFE: 120 ~ 240 SOT-23CHIP TRANSISTOR

KTC3875S-Y KECQ951VA & VS

DISCHARGER

KECNPN 60V 150MA HFE: 120 ~ 240 TO-92TRANSISTORKTC3198-YQ953, Q954

INFINEON ORFAIRCHILD

N-CHANNEL 600V 20A TO-247 OR 600V 20A TO-3PMOSFETSD20N60 ORFCA20N60S

Q851, Q852,Q855, Q859


NECCTR: 200 ~ 400 DIP 4PINPHOTO COUPLERPS2571L1-1-V-APC701, PC951

ST MICROELECTRONICS

HIGH VOLTAGE RESONANT CONTROLLER; FREQ: 60kHz DIP-16

CONTROLLERL6598U851

LITTELFUSE5A 250V 5X20MM SLOW-BLOFUSE215005F851

VSCONVERTER

ST MICROELECTRONICS

N-CHANNEL 900V 5.8A TO-220FMOSFETSTP6NK90ZFPQ801

SMART ELECTRONICSINRUSH CURRENT PROTECTOR; 250V-3A00 V-TYPE; 0.16 OHM

FUSING RESISTOR

ICP250-3A00R809



FAIRCHILDSMPS SWITCHING CONTROL; DUTY CYCLE: 70%MAX DIP-8

SMPS CONTROLLER

KA7552AU801

VA CONVERTER

APECP-CHANNEL -30V -30A TO-220MOSFETAP40P03GIQ270

KECDC/DC CONVERTER FREQ: 100kHz 8PIN DIPCONTROLLERKIA34063AU2513.4V SUPPLY

KECLOW DROP OUT REGULATOR; ON/OFF; 5V 2A TO-220ISLDO REGULATORKIA278R05PIU233STBY5V SUPPLY

FAIRCHILDN-CHANNEL 60V 31A TO-220FMOSFETFQPF50N06 Q231

KECSHUNT REGULATOR VREF: 2.470 ~ 2.520V TO-92LINEAR ICKIA431A-AT/P KECU2315V SUPPLY

APECN-CHANNEL 30V 45A TO-252(H)CHIP MOSFETAP60T03GHQ2336V SUPPLY

SENSITRON ORVISHAY

100V 20A ITO-220ABSCHOTTKY RECTIFIER

MBRF20100CT ORVF20100SG

D233, D2346.5V SUPPLY

MANUFACTURERDESCRIPTIONCLASSGENERIC NUMBER

LOCATIONSECTION


60” X-PSU. AC Input and Voltage for Multi-Output Converter

D125-CATHODE

VOLTAGE FOR MULTI-OUTPUT CONVERTER

D126-ANODE

D126-ANODE

D125-CATHODE

D126-ANODE

D125-CATHODE

AC PLUG-IN TURN-ON


60” X-PSU. Multi-Output Converter

D156-CATHODE

Q151–DRAIN

U601-PIN 6

U601–PIN 5D156-CATHODE

Q151–DRAIN

U601-PIN 6 (GATE)

U601–PIN 5 (VDD)

D156-CATHODE

Q151–DRAIN

U601-PIN 6 (GATE)

U601–PIN 5 (VDD)

STAND-BY MODE

WORKING MODE

FROM D125-CATHODE


AC_DET

PFC_DET

VS_OCP

VS_DET

SOUND

12V

6V

5V

MULTI_ON

M5V_ON

3.4V_ON

VS_ON

STBY_ON

DISCHARGE

VA_DET

PFC_ON

RL1

RL2

3.4V

3.3V_ON_IN

5V_ON_IN

VS_ON_IN

RL_ON

AC_ON

Input 1 12V VS_DET 28 Input

Input 2 3.4V VA_DET 27 Input

Input 3 5V SOUND 26 Input

Input 4 6V STBY_ON 25 Out

VDD 5 VDD VSS 24 GND

Input 6 VS_OCP RESET 23 Input

Out 7 DISCHARGE XOUT 22 Out

Out 8 M5V_ON XIN 21 Input

Out 9 3.4V_ON VS_ON 20 Out

Out 10 MULTI_ON PFC_ON 19 Out

Input 11 3.3V_ON_IN PFC_DET 18 Input

Input 12 5V_ON_IN AC_DET 17 Input

Input 13 VS_ON_IN RL1 16 Out

Input 14 RL_ON AC_ON 15 Out

U701 M

C80F0

308

SignalsFrom/To

Main Chassis

Signals From/ToConverters and Regulators

X-PSU Block Diagram. Micro-controller


Troubleshooting

Power SupplySupplements for previous Spring 2007 Meetings


Troubleshooting LG Power Supplies

Troubleshooting


This presentation will discuss Troubleshooting Techniques employed in Flat Screen LG Plasma and LCD Display Power Supplies.

Upon Completion of this section the Technician will be able to confirm the condition of the Power Supply with great accuracy and be able to

confirm normal operation without circuit board replacement.

Troubleshooting

Power Supply


With the Power Supply Board removed from the unit and placed in a service position apply AC Power to connector SC101 and check for Standby 5v at connector P800 ( Pin3 )and the presence of 5v AC Detect at P800 ( Pin1 ). Remove Power.

Step 1

Step 2

If the 5v Standby and AC Detect are normal, check the resistance at the output of ConnectorsP804 ( 5VDC, between Pins1 and 5 ) and P805 ( VS, between Pins 5 and 10 ) and ( VA, between Pins 1 and 5 )to be sure there are no short circuits, the resistance should be in the Meg Ohm Range.

Step 3

Connect the resistors and Light bulbs as shown in the Diagram ( PG 6 ) and apply AC Power. The Power Supply should output all the voltages necessary to operate the unit.

Failure of normal operation at this point indicates Circuit Board Repair or Replacement.

This Troubleshooting Procedure relates to the 50PC1DR Power Supply and should be used to assist in Troubleshooting and determining whether the Power Supply is functioning properly

without circuit board substitution.

Power Supply

Troubleshooting50PC1DR Plasma Display


Power Supply Low Voltage Connectors

P8001) AC-D2) RL-ON3) S-5V4) GND5) VS-ON6) 5V-D7) M5V-ON8) S-5V9) GND10) NC11) 6V12) N.C13) 3.3ON

P800

PIN1

P803

PIN 1

P8031) 3.3V2) 3.3V3) GND4) GND5) 6V6) 6V7) GND8) GND9) 12V10) 12V11) GND12) GNDP802

PIN 1

P8021) 19V2) 19V3) GND4) GND5) 6V6) GND7) 3.3V8) GND9) 12V10) GND

Troubleshooting


Power SupplyP805

P804

VS

GRND

VA

GRND

5VDC

P8001) AC-D2) RL-ON3) S-5V4) GND5) VS-ON6) 5V-D7) M5V-ON8) S-5V9) GND10) NC11) 6V12) N.C13) 3.3ON

P800 113

12345612 11 10 9 8 713

= 100 Ohms ¼ Watt

= 1000 Ohms ¼ Watt

P800

= (2) 60 Watt Light Bulbs connected in series

Troubleshooting

Pin 5

Pin 10

50PC1DR Plasma Display

P803 P8021 11012


This Troubleshooting Procedure relates to the Power Supply used in the 47LB1 LCD Display Panel. This explanation will aide the Technician in confirming the normal operation of the Power Supply without

needing to substitute the board.

Power Supply

Troubleshooting47LB1

Step 1

Remove the Power Supply Board from the unit and place it in the service position

Step 2Connect AC Power to connector SC100 and confirm presence of 5v Standby ( P202 pin 3 ) and AC Detect ( P202 Pin 1 ). Remove Power, if both are present proceed to Step 3.

Step 3Place 100 Ohm ¼ watt resistor as shown in the Diagram (PG 8) between RL - ON ( Pin 3 ) and 5v Standby VCC ( Pin 15 ) on the Sub Micon Board and apply AC Power. The 6v and 12v Supplies ( see PG 9 for their locations ) should now be present. Remove Power.

Step 4Install a 1K Ohm ¼ watt resistor as shown in the Diagram (PG 9) between 5v Standby ( P202 Pin 3 ) and 3.3v ON ( P202 Pin 13 ). Apply AC Power the remaining 19v, 24v and 3.3v Supplies should all be presentSee PG 9 for their locations.

Failure at any of above steps indicates a problem with the Power Supply, the Board will need to be Replaced or Repaired


P202P201P200

Sub Micon Board

SC100ACINPUT

100 OHMS

Pin 3RL- ON

Pin 155v Standby

5vStandby

Pin 33.3v ONPin 13

Power Supply Board47LB1

1K OHM

Troubleshooting

T101T102

P206P203

P205P204

Resistors are ¼ watt


47LB1Troubleshooting

Power SupplySub Micon

1 5 9 16

(1) RLY ON

(2) ACD ON

(3) RLY ON / OFF

(4) ACD

(5) MULTI ON/ OFF

(9) 24V ON OFF

(10) 3.4V DET

(11) 19V DET

(12) 12V DET

(13) 6V DET

(14) 24V DET

(15) 5V STB VCC

(16) GND

Connect a 100 Ohm ¼ Watt Resistor from pin 3 to pin 15 as indicated


Troubleshooting47LB1

POWER SUPPLY

(4) GND

(1) AC DETECT

(2) POWER N/F

(3) ST5V

(5) INV CTRL

(6) ERR_OUT

(7) BRT_CTRL

(8) ST5V

(9) GND

(10) PWR_DIMM

(11) 6V

(12) GND

(13) 3.4V_ON

(1) 19V

(2) 19V

(3) GND

(4) GND

(5) 6V

(6) GND

(7) 3.4V

(8) GND(9) 12V

(10) GND

(1) 3.4V

(2) 3.4V

(3) GND

(4) GND

(5) 6V

(6) 6V

(7) GND

(8) GND

(9) 12V

(10) 12V

(11) GND

(12) GND

P200 P201 P202112 110 113 3

Connect 1K Ohm ¼ Watt Resistor from Pin 3 to Pin13 of P202


The End Thank You!

Troubleshooting

Advanced Dual Scan PDP Troubleshooting - Diagramas dediagramas.diagramasde.com/televisores/PDP_Presentaion_60PC1D_Fal… · Advanced Dual Scan PDP Troubleshooting. ... and mechanical

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