Diagrma de Modular LG MCV1306

Mini Hi-Fi SystemSERVICE MANUAL

MODEL: MCV1306 (MCV1306, MCS1306F/S/W)CAUTIONBEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONSIN THIS MANUAL.

MO

DE

L: M

CV

1306 (MC

V1306, M

CS

1306F/S

/W)

SE

RV

ICE

MA

NU

AL

P/NO : AFN74972291 AUGUST, 2011

Website http://biz.lgservice.comInternal Use Only

CONTENTS

SECTION 1 ........GENERAL

SECTION 2 ........CABINET & MAIN CHASSIS

SECTION 3 ........ELECTRICAL

SECTION 4 ........REPLACEMENT PARTS LIST

1-1

SECTION 1

SUMMARY

CONTENTS

SERVICING PRECAUTIONS ................................................................................................................... 1-3

ESD PRECAUTIONS .................................................................................................................................. 1-5

SERVICE INFORMATION FOR EEPROM .......................................................................................... 1-6

PROGRAM DOWNLOAD GUIDE ........................................................................................................... 1-7

SPECIFICATIONS ..................................................................................................................................... 1-10

1-2

NOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and

impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort lens.

6) Never attempt to disassemble the pick-up.Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

Storage in conductive bag Drop impact

NEVER look directly at the laser beam, and dont allow contact with fingers or other exposed skin.

Magnet

How to hold the pick-up

Conductive Sheet

Cotton swab

Pressure

Pressure

1-3

SERVICING PRECAUTIONS

NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components

are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature or humidity is high, where strong magnet-ism is present, or where there is excessive dust.

2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.

When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1 M)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent stat-

ic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Resistor(1 M) Conductive

Sheet

Resistor(1 M)

Armband

1-4

Electrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESD devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.

6. Do not remove a replacement ESD device from its protective package until immediately before you areready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED DANGEROUS VOLTAGE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.

1-5

ESD PRECAUTIONS

POWER ON

FLD no disc status

Remote control + Front STOPpush same timing during 5s

FLD OP-0.

Move to appropriate position and make changes with remote control.

( , , / , REPEAT )

Press STOP key

FLD write ok

Remote control +Front STOP push same timing

FLD E2P CLR

Completed

NAME

OP0 OP1 OP2 OP3 OP4 OP5 OP6 OP7 OP8 OP9

DETECT NEW EEPROM(OPTION EDIT SCREEN)

HEX

0500000000699007D009

1-6

SERVICE INFORMATION FOR EEPROM

1. AUDIO PROGRAM

Download program file name must be MCV1306_YYMMDDX.HEX If security program (Water Wall) is activated on your PC, you must save the file to the usb storagedevice and disable the security software, then download the file to your set.

Caution: When downloading the file, you should neither unplug the usb device, change to the otherfunction, nor power off the device. Usb device must be unplugged when the downloadingprocess is completed.

ON VFD DISPLAY SCREEN

NO USB

Insert usb device at usb functionREAD

FIRMWARE

WRITE 00 .. 100

UPDATED

POWER OFF AUTOMATICALLY When completed, remove usb device.

1-7

PROGRAM DOWNLOAD GUIDE

2. CD PROGRAM

Download program file name must be HD003_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storagedevice and disable the security software, then download the file to your set.



NO USB


FIRMWARE

FINISH

UPDATED


1-8

3. BEAT BOX PROGRAM

Download program file name must be BEAT_BIN_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storagedevice and disable the security software, then download the file to your set.



NO USB


FIRMWARE

FINISH

UPDATED


1-9

SPECIFICATIONS

GENERALPower requirements Refer to main labelPower consumption Refer to main labelDimensions (W x H x D) 285 x 388 x 351 mm without footNet Weight (Approx.) 7.2 kgOperating temperature 5 C to 35 C (41 F to 95 F)Operating humidity 5 % to 90 %Bus Power Supply USB DC 5 V 500 mA iPod DC 5 V 1 A

INPUTS/ OUTPUTSANALOG AUDIO IN 1.2 Vrms (1 kHz), 600 , RCA jack (L, R) x 1PORT. IN 0.5 Vrms (3.5 mm stereo jack)ANALOG AUDIO OUT 800 mVrms (1 kHz), 600 , RCA jack (L, R) x 1

TUNERFM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHzAM Tuning Range 522 to 1 620 kHz, 520 to 1 710 kHz or 522 to 1 710 kHz

AMPLIFI ERStereo mode 270 W + 270 W (4 at 1 kHz)Surround mode Front 270 W + 270 W (4 at 1 kHz, THD 10 %) Rear 150 W + 150 W (8 at 1 kHz, THD 10 %) Subwoofer1 270 W (4 at 60 Hz, THD 10 %) Subwoofer2 270 W (4 at 60 Hz, THD 10 %)

CDFrequency Response 40 to 20 000 HzSignal-to-noise ratio 75 dBDynamic range 80 dB

SPEAKERSFront speakerType 2 Way 2 speakerImpedance 4 Rated Input Power 270 WMax. Input power 540 WNet Dimensions (W x H x D) 263 x 460 x 358 mmNet Weight 7.3 kg

Rear speakerType 2 Way 2 speakerImpedance 8 Rated Input Power 150 WMax. Input power 300 WNet Dimensions (W x H x D) 198 x 338 x 258 mmNet Weight 3.1 kg

Passive subwoofer 1/ 2Type 1 Way 1 speakerImpedance 4 Rated Input Power 270 WMax. Input power 540 WNet Dimensions (W x H x D) 347 x 457 x 355 mmNet Weight 8.4 kg

Design and specifications are subject to change without notice.

1-10

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (CDM-H1803) ........................ 2-21. ORDER OF DISASSEMBLY FOR MECHANISM DECK .......................................................................... 2-22. ORDER OF ASSEMBLY FOR MECHANISM DECK ................................................................................ 2-6

EXPLODED VIEWS ................................................................................................................................... 2-111. CABINET AND MAIN FRAME SECTION (MCV1306) ............................................................................ 2-112. MECHANISM DECK SECTION (CDM-H1803) ....................................................................................... 2-133. PACKING ACCESSORY SECTION ....................................................................................................... 2-154. SPEAKER SECTION .............................................................................................................................. 2-16

2-1

2-2

DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (CDM-H1803)1. ORDER OF DISASSEMBLY FOR MECHANISM DECK

Figure 1

1) Disassemble the Cover Guide Disc.

2

1

Figure 3

3) Pull up the Holder 1 to completely disassemble the Tray Loading Assy from the Base Main Assy.

3

2

1

Figure 2

2) Disassemble the Loading FFC from the Main PCB Assy.Turn the Gear in OPEN direction as shown in Figure 2 to take out the Tray Loading Assy in 3 direction.

2-3

ORDER OF DISASSEMBLY FOR MECHANISM DECK

2

14) Loosen the screw to pull up and disassemble the Tray Disc.

Figure 4

6) Disassemble the Gear Tray, Tray Motor Assy and Loading PCB Assy from the Tray Loading.

Figure 6

5) Loosen the screw to pull up and disassemble the Gear Tray CAM.

Figure 5

2-4


1

2

3

Figure 7

9) Push the Guide UD in direction 1 to disassemble it from the Base Main.

8) Disassemble each gear part, Clamp Disc, Clamp Magnet and Cover Plate from the Base Main.Disassemble the Loading Motor Assy by being careful of the hook on the surface of the Base Main.

7) Disassemble the Harness Cable from the Base Main.Disassemble the Base Sled Assy from the Base Main by referring to Figure.

3

2

1

Figure 8

2

1

Figure 9

2-5


1

2

3

4

10) Use a solder to remove the Motor Jump Wire from the Main PCB Assy and then disassemble the FFC Cable.Loosen the screw to disassemble the Main PCB Assy.

Figure 10

2-6

2. ORDER OF ASSEMBLY FOR MECHANISM DECK1) Assemble the Loading Motor Assy to the Base Main.(When assembling the Motor Assy, use the hook on the surface of the Base Main to preassemble, and then tighten the screws.)

Figure 1

Figure 2

12

3

2) Set the Guide UD on the Base Main.After setting the part, push it in direction 3.

2-7

3) Set the Gear Loading 1 and Gear Pulley 2 on the Base Main.Hang the belt between the Gear Pulley and Motor Pulley.Assemble the Clamp Disc, Clamp Magnet and Cover Plate to the Base Main.

4) After setting the Gear Main 2, Gear Pu Up 3 and Gear Pu Down 4 on the Base Main, tighten the screws.After assembling the Gear Main, align the location as shown in Figure.

ORDER OF ASSEMBLY FOR MECHANISM DECK

1

2

Figure 3

Figure 4

2

3

4

1

2-8


1

2

Figure 5

45

3

2

1

Figure 6

5) After setting the Main PCB Assy on the Base Main, tighten the screw. (Set the part accurately on the hook)Solder the Motor Jump Wire on the PCB set on the Base Main.

6) Set the Base Sled Assy on the Base Main.(When setting the part, assemble with the CAM part of the Guide UD inserted in two locations of the Boss of Frame UD)Align the FFC to the Guide and connect the Harness Cable.

2-9

Figure 7

2

1

Figure 8

7) After setting the Gear Tray, Tray Motor Assy and Load-ing PCB Assy on the Tray Loading, tighten the screw.

8) Assemble the Gear Tray CAM on the Tray Loading and set the Tray Disc.(When assembling, check the location of the Gear Tray CAM and Tray Disc as shown in the Figure)


2-10

1

2

3

Figure 9 Figure 10

9) Assemble the Tray Loading Assy on the Base Main Assy as shown in the Figure.After assembling, insert the Loading FFC to the 5 Pin Wafer of Main PCB Assy.

10) After setting the Cover Guide Disc, tighten the screw.


2-11 2-12

EXPLODED VIEWS1. CABINET AND MAIN FRAME SECTION (MCV1306)

H

J

F

E

G

I

DC

A26

267

264

A49

A43

268

269

300

464

464

464

464

464

464

464

464

464

464270

A45

A42

CABLE1

CABLE7

CABLE6

CABLE2

iPod

VOLUME

VFD

USB

464

A

B

E

A

B

F

HD

G

I

J

C

A46

265463

464

464

463

463

A47

266MAIN

SMPS

CN102

251

255B

255A

255C

492

463

266A

269

A44

271

464

464

274

274 465272

CN101

NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.

2-13 2-14

2. MECHANISM DECK SECTION (CDM-H1803)MEMO

A02

A01

153A

012B

012B

012A

151 416

153

159

155

177

182

416

417

417

001

002

003

173

172

166

167

164 175

440

012

137

012

012

012

010

180

162

163

165

422

422

421

421

421

421

A26

443

443443

156

2-15

801 Owners Manual

804 Bag

802 Box

910 Cover

900 Remote Control

824 AM Loop Antenna

808 Battery

825 FM Wire Antenna

803 Packing

AA

AA

AA

3. PACKING ACCESSORY SECTION

2-16

A60R A60L

4. SPEAKER SECTION 4-1. FRONT SPEAKER (MCS1306F)

2-17

A80R A80L

4-2. REAR SPEAKER (MCS1306S)

2-18

A90

4-3. PASSIVE SUBWOOFER (MCS1306W)

SECTION 3 ELECTRICAL

CONTENTSTRAINING MASTER ................................................................................................................................... 3-2

1. NO SOUND FROM SPEAKERS ............................................................................................................ 3-22. NO SOUND IN AUX FUNCTION ............................................................................................................ 3-33. NO SOUND IN PORT. IN FUNCTION ................................................................................................... 3-44. NO SOUND IN IPOD FUNCTION .......................................................................................................... 3-55. NO SOUND IN AM/FM FUNCTION ....................................................................................................... 3-66. NO SOUND IN CD FUNCTION .............................................................................................................. 3-77. NO SOUND IN USB FUNCTION ............................................................................................................ 3-98. NO POWER .......................................................................................................................................... 3-10

ONE POINT REPAIR GUIDE ................................................................................................................. 3-111. NO POWER .......................................................................................................................................... 3-112. NO BOOTING WHEN POWER ON THE SET ..................................................................................... 3-133. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ................................................................... 3-144. NO OPERATION OF MD ..................................................................................................................... 3-155. NO SOUND .......................................................................................................................................... 3-21

ELECTRICAL TROUBLESHOOTING GUIDE .................................................................................. 3-291. POWER SUPPLY ON SMPS BOARD ................................................................................................. 3-292. SYSTEM PART .................................................................................................................................... 3-333. NO AUDIO PART ................................................................................................................................. 3-344. DIGITAL AUDIO AMP CHECK ............................................................................................................. 3-39

WAVEFORMS ............................................................................................................................................. 3-40

WIRING DIAGRAM ................................................................................................................................... 3-43

BLOCK DIAGRAMS ................................................................................................................................. 3-451. OVERALL BLOCK DIAGRAM .............................................................................................................. 3-452. SMPS BLOCK DIAGRAM..................................................................................................................... 3-473. POWER BLOCK DIAGRAM ................................................................................................................. 3-49

CIRCUIT DIAGRAMS ............................................................................................................................... 3-511. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-512. MICOM CIRCUIT DIAGRAM ................................................................................................................ 3-533. PWM CIRCUIT DIAGRAM .................................................................................................................... 3-554. AMP CIRCUIT DIAGRAM ..................................................................................................................... 3-575. DSP CIRCUIT DIAGRAM ..................................................................................................................... 3-596. RF SERVO CIRCUIT DIAGRAM .......................................................................................................... 3-617. ADC CIRCUIT DIAGRAM ..................................................................................................................... 3-638. BEAT BOX CIRCUIT DIAGRAM .......................................................................................................... 3-659. VFD CIRCUIT DIAGRAM ..................................................................................................................... 3-67

10. VOLUME CIRCUIT DIAGRAM ............................................................................................................. 3-6911. USB CIRCUIT DIAGRAM ..................................................................................................................... 3-7112. IPOD CIRCUIT DIAGRAM .................................................................................................................... 3-7313. MIC CIRCUIT DIAGRAM (OPTIONAL PART) ..................................................................................... 3-75

CIRCUIT VOLTAGE CHART ................................................................................................................. 3-77

PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-811. MAIN P.C.BOARD ................................................................................................................................ 3-812. SMPS P.C.BOARD ............................................................................................................................... 3-853. VFD P.C.BOARD .................................................................................................................................. 3-874. VOLUME P.C.BOARD .......................................................................................................................... 3-895. USB P.C.BOARD .................................................................................................................................. 3-916. IPOD P.C.BOARD ................................................................................................................................ 3-917. MIC P.C.BOARD (OPTIONAL PART) .................................................................................................. 3-91

3-1

3-2

Are the speaker cables connected correctly between the speaker terminals on the unit

and the speakers?

Make sure to connect the cables to each specified connector tightly on the unit.

Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel.

YES

NO

Does the customer select correctly the input function he or she wants to listen to?

Make sure to connect some cables like A/V cables and FM/AM antenna cables.

YES

NO

After pressing FUNCTION, is CD, USB, AUX, IPOD, AM or FM displayed?

Make sure to select the desired input function pressing FUCTION button.

YES

NO

Turn the master volume clockwise for the volume up.

The volume level LEDs around the master volume will be turned on more and more

while turning it clockwise for the volume up.

YES

NO

Is there any sound from the selected input source? (AUX IN, USB, TUNER or CD Disc)

Refer to a devices instruction manual and then check if there is sound output from it

connecting another audio system.

YES

NO

Are the sound spectrum level LEDson the left and right side of the front panel

being changed up and down according to the sound input gain?

The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. The speakers cables

might be short-circuited with the chassis ground. Be careful not to be shorted each other.

YES

NO

The sound is output from the speakers.

YES

Sound OK

1. NO SOUND FROM SPEAKERS

TRAINING MASTER

3-3

Does the customer select correctly the AUX function he or her wants to listen to?

Make sure to connect some cables between the AUX IN jacks of the unit

and the Audio output jacks of a external Audio device.

YES

NO

After pressing the FUNCTION, is AUX displayed on VFD?

Make sure to select the AUX IN function pressing the AUX/IPOD/PORT. IN button.

YES

NO




YES

NO

Is there any sound from the selected input source?

Refer to a devices instruction manual and then check if there is sound output from it connecting another audio system

YES

NO



The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground.

Be careful not to be shorted each other.

YES

NO


and the speakers?


YES

NO


YES

Sound OK

2. NO SOUND IN AUX FUNCTION

TRAINING MASTER

3-4

Does the customer select correctly the PORT. IN function he or her wants to listen to?

Make sure to connect a cable between the PORT. IN jack of the unit and the Audio

output jack of a portable device like a MP3 player.

YES

NO

Is PORT. IN displayed on VFD?Make sure to select the PORT. IN function pressing the AUX/IPOD/PORT. IN button.

YES

NO




YES

NO

Is there any sound from the selected input source?

Refer to a portable devices instruction manual and then check if there is sound output

from it connecting another audio system.

YES

NO





YES

NO


and the speakers?


YES

NO


YES

Sound OK

3. NO SOUND IN PORT. IN FUNCTION

TRAINING MASTER

3-5

Does the customer select correctly the iPod function he or she wants to listen to?

Make sure to put a iPod or a iPhone on the docking system on the top of the unit.

YES

NO

Does the customer use the compatible iPod?

Make sure that The unit supports the models as follows/iPod nano 1 G, 2 G, 3 G, 4 G, 5 G, 6 G/

iPod classic/ iPod 4 G, 5 G/iPod touch 2 G, 3 G, 4 G/ iPhone 3 G, 4 G/.

YES

NO

After displaying Loading, is IPOD displayed on VFD?

If ERRORmessage is displayed, make sure firmly to put a iPod or a iPhone on the docking system on the top of the unit. When the battery of a iPod or a iPhone is fully discharged, the unit can not detect IPOD function, Please wait for a moment

and then it will work after charging a little.

YES

NO

After selecting desired songs using the user interface of a iPod or a iPhone, press PALY button and turn the master volume

clockwise for the volume up.



YES

NO

Is there any sound from iPod or iPhone?Refer to a devices instruction manual

and then check if there is sound output from it connecting another audio system.

YES

NO

Are the sound spectrum level LEDs on the left and right side of the front panel


The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. A speaker cable might

be short-circuited with the chassis ground. Be careful not to be shorted each other.

YES

NO


and the speakers?


YES

NO

The sound is output from the speakers. Sound OKYES

4. NO SOUND IN IPOD FUNCTION

TRAINING MASTER

3-6

Does the customer select correctly the AM/FM function he or she wants to listen to?

Make sure to connect AM/FM antennas on the rear panel of the unit.

YES

NO

Is AM or FM displayed on VFD?Make sure to select AM or FM function

pressing the FUNC button.

YES

NO

After tuning a desired channel using the TUNING button,

is the sound quality good to listen to the music?

To prevent noise pickup, keep the AM Loopantenna away from the unit and other components.Be sure to fully extend the FM wire antenna. After

connecting the FM wire antenna, keep it horizontal.

YES

NO

Is the signal strength of the radio station too week? Make sure to tune the station manually.

YES

NO



The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. A speaker cable might

be short-circuited with the chassis ground. Be careful not to be shorted each other.

YES

NO


and the speakers?


YES

NO


YES

Sound OK

5. NO SOUND IN AM/FM FUNCTION

TRAINING MASTER

3-7

Does the customer select correctly the CD function he or she wants to listen to?

Make sure to put on a CD disc on the tray.

YES

NO

Is a CD disc put on the tray correctly? Make sure to insert the CD disc upside down.

YES

NO

Does the unit display NO DISC on VFD when a disc is inserted on the tray?

Place the disc with the label or printed side facing upwards.

YES

NO

Does the customer use the supported mp3 or WMA music files on the disc?

Check the playable disc. Make sure that the file extensions

are .mp3 or .wma.

YES

NO

When the unit searches music files in a CD disc, are the following messages displayed on VFD?

SELECTED TRACKING # and TIME

Make sure to check the supported MP3/WMA music file on the CD disc.

Refer to the owners manual.

YES

NO

After selecting a track number using the SCAN or DISC# button, press PLAY button and turn the master

volume clockwise for the volume up.



YES

NO

Is the sound quality good to listen to the music?

Make sure to clean CD discs with a commercially available cleaner. If the surface of the disc is polluted

or scratched, the sound quality can become bad or the customer can not listen to the music.

YES

YES

NO

Are the sound spectrum level LEDs on the left and right side of the front panel

changed up and down according to the sound input gain?



NO

6. NO SOUND IN CD FUNCTION

TRAINING MASTER

3-8

YES

NO

NO

TRAINING MASTER


and the speakers?


YES

NO

The sound is output from the speakers. Sound OKNO

YES

3-9

Does the customer select correctly the USB function he or she wants to listen to?

Make sure to insert a USB on the USB ports on the bottom of the unit.

YES

NO

Is USB displayed on VFD?Make sure to select the USB function

pressing the CD/USB button.

YES

NO

Does the unit display SELECTED on VFD when a USB is inserted into the USB port?

When No USB is displayed, make sure that the customer uses the recommended

USB which support USB2.0 or USB1.1.

YES

NO

Does the customer use the supported mp3 or WMA music files on the disc?

Check if it is the playable disc or not. Make sure that the file extensions are

.mp3or .wma.

YES

NO

When the unit searches music files in a USB, are the following messages displayed on VFD?

SELECTED TRACKING # and TIME

Make sure to check the compatible USB device and the supported MP3/WMA music file requirement.

Refer to the owners manual.

YES

NO

After selecting a track number using the SCAN button, press PLAY button and turn the master volume

clockwise for the volume up.



YES

NO

Are the sound spectrum level on the left and right side of the front panel


The sound spectrum level will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground.


YES

YES

NO


and the speakers?


NO

7. NO SOUND IN USB FUNCTION

TRAINING MASTER

3-10

The sound is output from the speakers. Sound OK

YES

NO

Is the power cord plugged into a electrical outlet?

Make sure to plug the power cord of the unit into a electrical outlet.

YES

NO

Does the Standby LED light in red color?

If the customer can not see the red light on the front panel, the SMPS might have any problem.

Please solve the problem referring to the service manual.

YES

NO

Is the Standby LED turned off after pressing the Power button

on the remote control?

Replace the batteries with new ones if the remote control doesnt work.

YES

NO

Are the messages displayed in the following order on VFD?

HELLOW VOLUME 15 FUNCTION

The SMPS might be not able to supply the power to drive the VFD.

Refer to the service manual to fix it.

YES

NO

Is there any sound from the speakers each input function?

Make sure to connect speaker cables.

YES

NO

Power & Sound OK

8. NO POWER

TRAINING MASTER

3-11

ONE POINT REPAIR GUIDE

1. NO POWERIf the unit doesnt work by no power problem, repair the set according to the following guide.

1-1. FUSE & BRIDGE DIODE1-1-1. SolutionPlease check and replace F901, BD901, TH901, TH903 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)1) Check if the fuse F901 is open or short-circuit.2) Check if the bridge diode DB901 is short-circuit by over current with a digital multi meter.3) Check if the NTC thermistor TH901 and TH902 is normal or open.

1-1-3. Service hint (Any picture / Remark)

< F901 > If F901 is not short-circuit,

replace it with a same specifi cations one.

< TH901, TH903 > If TH901 or TH902 is open,replace it with a new one.

< BD901 > If BD901 is short-circuit,

replace it with a new one.

3-12


NO POWERIf the unit doesnt work by no power problem, repair the set according to the following guide.

1-2. D951, ZD9511-2-1. SolutionPlease check and replace D951, ZD951 on SMPS board.

1-2-2. How to troubleshoot (Countermeasure)1) Check the Anode-Cathod Voltage of D951 with a digital multi-meter, it is normally 0.2 ~ 0.3 V. If it doesnt have any voltage, its destroyed. Replace it with a new one.2) Check if ZD951 is short-circuit. If it is short-circuit, and then replace it with a new one.


< SMPS schematic diagram >

3-13


2. NO BOOTING WHEN POWER ON THE SETThe set doesnt work when press the power button on the front board or the remote control.

2-1. FLASH MEMORY2-1-1. SolutionPlease check and replace IC101 on MAIN board.

2-1-2. How to troubleshoot (Countermeasure)1) Check the 3.7VA to CN102, CN103, and CN104 in standby mode. If there is no 3.7 VA, check the SMPS.2) Check 5.6 V, 12 VA, FL+, FL- and 32 V when power on the set. - If the set doesnt work regardless of what the KEY1 changes high to low while pressing the power button. X100 and X101 work normally but, if you can not power on the set, replace the IC101 with a new one on the main board.


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< Signal check point >

3-14


3. VFD IS NOT DISPLAYED WHEN POWER ON THE SETWhen power on the set, any icons or characters on VFD are not displayed.

3-1. VFD3-1-1. SolutionPlease check and replace DIG301 on FRONT board.

3-1-2. How to troubleshoot (Countermeasure)1) Check if 32 V, FL+ and FL- are output from SMPS to VFD via the MAIN board.2) Check if the IC101 outputs VFD_RST, VFD_CLK, VFD_STB, and VFD_STB to the FRONT board.3) Check if the VFD grid current amplifier circuit (Q301, Q303, Q304) on the FRONT board. Check the drive signal to the transistors base. If the control signals from VFD (TP302, TP303, TP304) isnt output, replace VFD with a new one. If the transistor doesnt work, replace it.


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< Waveform of the grid current driver >

3-15


4. NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD dont work. This step is for checking the SPINDLE MOTOR among them.

4-1. SPinDLE MOTOR4-1-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-1-2. How to troubleshoot (Countermeasure)1) Check the SPDO signal from Pin16 of IC407. If no signal, check 3.3V(RF) and X402.2) Check the SP- & SP+ from IC408 to CN405 for driving SPinDLE motor. It is about 3.6 Vp-p. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the sPindle motor is sort-circuit or has any trouble, it can not rotate CD discs. Please check the function after changing another MD.


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< Waveform of SP- & SP+ for driving SPinDLE motor >


3-16


NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD dont work. This step is for checking the SLED MOTOR among them.

4-2. SLED MOTOR4-2-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-2-2. How to troubleshoot (Countermeasure)1) Check the SLDO signal from Pin15 of IC407. If no signal, check 3.3V(RF) and X402.2) Check the SLED+ & SLED-from IC408 to CN405 for driving SPinDLE motor. It is about 2.9 Vp-p. If no signal, check +1.8V and +5V for IC408.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the sled motor is sort-circuit or has any trouble, it can not move the pickup module. Please check the function after changing another MD.


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< Waveform of SLED- & SLED+ for driving SLED motor >


3-17


NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD dont work. This step is for checking the TRAY MOTOR among them.

4-3. TRAY MOTOR4-3-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-3-2. How to troubleshoot (Countermeasure)1) Check TUR+ & TUR-signals from Pin56 & 57 of IC501 to IC406. If no signal, check +5 V to IC406.2) Check TUR_M+ & TUR_M- from IC406 to CN405 for driving TRAY motor. It is about 3.8 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not rotate the tray. Please check the function after changing another MD.


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< Waveform of TUR_Mfor driving TRAY motor >


3-18


NO OPERATION OF MDWhen no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD dont work. This step is for checking the TRAY OPEN/CLOSE MOTOR among them.

4-4. TRAY OPEN / CLOSE MOTOR4-4-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-4-2. How to troubleshoot (Countermeasure)1) Check MOT_OPEN & MOT_CLOSE signals from Pin104 & 105 of IC501 to IC408. If no signal, check +1.8 V & + 5 V to IC408.2) Check LOAD from IC406 to CN405 for driving the tray open / close motor. It is about 3.85 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one.3) Check if the FFC cable is solidly connected between CN405 and MD.4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not open or close the tray. Please check the function after changing another MD.


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< Waveform for driving TRAY open / close motor >


3-19


NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesnt work. This step is for checking the LASER TRACKING ACTUATOR.

4-5. LASER TRACKING ACTUATOR4-5-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-5-2. How to troubleshoot (Countermeasure)The tracking actuator makes the laser beam be positioned in the center of a track on CD disc.1) Check the TRD signal from Pin14 of IC407. If no signal, check 3.3 V(RF) and X402.2) Check T- & T+ from IC408 to CN404 for driving the tracking actuator. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN404 and MD.4) Check the MD. If the pickup module has any trouble, it can not move the laser beam on the left or right side. Please check the function after changing another MD.


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< Waveform of T for driving TRACKING actuator >


3-20


NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesnt work. This step is for checking the LASER FOCUSING ACTUATOR.

4-6. LASER FOCUSING ACTUATOR4-6-1. SolutionPlease check and replace IC407, IC408 on MAIN board.

4-6-2. How to troubleshoot (Countermeasure)The focusing actuator makes the laser beam keep a regular interval with the surface of a CD disc.1) Check the FOD signal from Pin13 of IC407. If no signal, check 3.3 V(RF) and X402.2) Check F- & F+ from IC408 to CN404 for driving the focusing actuator. If no signal, check +1.8 V and +5 V for IC408.3) Check if the FFC cable is solidly connected between CN404 and MD.4) Check the MD. If the pickup module has any trouble, it can not move the laser beam on the top or bottom side. Please check the function after changing another MD.


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< Waveform of TR for driving FOCUSING actuator >


3-21


5. NO SOUNDThere is no sound output in the CD FUNCTION, repair the set according to the follow-ing guide.

5-1. IN THE CD FUNCTION5-1-1. SolutionPlease check and replace IC501, IC602, IC801 on MAIN board.

5-1-2. How to troubleshoot (Countermeasure)1) Check CD_BCK, CD_LRCK, & CD_DATA signals from IC407 to IC501. If no signal, check if the RF & servo signals from MD is entered to IC407. Refer to the No operation of MD guide on Item 4.2) Check the following I2S signal flow. < I2S audio signal Interface > - DAC_BCK: IC501_87Pin --> IC507_16Pin --> IC602_4Pin - DAC_LRCK : IC501_88Pin --> IC507_5Pin --> IC602_4Pin (44.1 kHz) - DAC_DATA : IC501_83Pin --> R817 next to IC01 --> IC602_6/9Pin - DAC_MCLK : IC501_86Pin --> R818 next to IC801 If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.3) Check if Digital audio AMP block on Item 5-2 is normal.


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IC501MLC9800

IC602PS9850

PWM

IC801FS502B

BEAT BOX

AMP ICTAS5631

DAC_BCK

DAC_LRCK

IC407BU9543KV

BEAT_DATA DAC_MCLK

< Waveform of I2S audio interface signals >< I2S Signal Flow >

3-22


NO SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide.

5-2. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS)5-2-1. SolutionPlease check and replace IC701, IC702, IC703 on MAIN board.

5-2-2. How to troubleshoot (Countermeasure)1) Check FL, FR, RL, RR, SW1, & SW2 signals from IC602 to IC701, 702 & 703 each input function. If no signal, check if I2S audio signals are entered to IC602. Refer to I2S audio signal interface on Item 5-1.2) Check PVDD_48V. If 48 V is abnormal, check the SMPS.3) Check +12 for driving the gate of AMP IC. a. All the powers are normal, but if +12 V is low, there is possible for AMP IC to be damaged. b. Remove a ferrite bead among FB703, FB707 and FB713 one by one. When removed a ferrite bead, if +12 V is recovered, the IC connected to it was damaged. c. Replace the IC with a new one.4) Check the impedance between SPK+ & GND and SPK- & GND. a. If the impedance is 0 , the IC must be damaged. b. After removing the heat sink, replace it with a new one.Comments !!If a AMP IC among three is damaged, AMP_PDN to R103 changes HIGH to LOW at regular intervals.The sound is not output by AMP power down function.


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3-23


NO SOUND There is no sound output in the USB FUNCTION, repair the set according to the fol-lowing guide.

5-3. IN THE USB FUNCTION5-3-1. SolutionPlease check and replace IC501, IC504 on MAIN board & IC3U01 on USB board.

5-3-2. How to troubleshoot (Countermeasure)1) Check +5VU to USB board. If the USB LEDs are turned on, the voltage is okay, if so not, check +5.6 V to Pin8 of CN602.2) Check USB D from main board to USB board. a. Check USB_HUB_DN/DP signals to IC501(Pin116, 117) b. Check USB1/2_DN/DP signals from IC504 to CN602 (Pin10, 11, 13, & 14) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one.3) Check if Digital audio AMP block on item 5-2 is normal.


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IC501MLC9800

IC602PS9850

PWM

IC801FS502B

BEAT BOX

AMP ICTAS5631

DAC_BCKDAC_LRCK

IC504USB2512B

DAC_DATA DAC_MCLK

ADC_DATADAC_MCLK

USB_D

BEAT_DATA

USB

< Waveform of USB D signal >< USB function signal fl ow >

3-24


NO SOUND There is no sound output in the AUX FUNCTION, repair the set according to the fol-lowing guide.

5-4. IN THE AUX FUNCTION5-4-1. SolutionPlease check and replace IC202 on MAIN board.

5-4-2. How to troubleshoot (Countermeasure)1) Check AUX_L/R signals to IC202 (Pin7, 8).2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.4) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.5) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one.


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IC602PS9850

PWM

IC801FS502B

BEAT BOX

AMP ICTAS5631

DAC_BCKDAC_LRCK

IC202CS5346

DAC_DATA DAC_MCLK

ADC_DATADAC_MCLK

AUX_L/R

BEAT_DATA

< Signal check point >< AUX function signal fl ow >

3-25


NO SOUND There is no sound output in the IPOD FUNCTION, repair the set according to the fol-lowing guide.

5-5. IN THE IPOD FUNCTION5-5-1. SolutionPlease check and replace IC201, IC202, IC203 on MAIN board.

5-5-2. How to troubleshoot (Countermeasure)1) Check USB VBUS_+5V to Pin3 of CN201 after inserting the iPod to IPOD Docking System. If no power, check if IPOD_P_CTRL to Pin3 of IC203 change Low to High.2) Check if IPOD Audio L/R signals are entered from Pin11 & 12 of CN201 to Pin10 & 6 of IC201.3) Check if the IPOD Audio L/R that some noise is removed to IC201 are output from Pin1 & 5 of IC201. If no signal, replace the IC with a new one.4) Check IPOD_L/R signals from 1 & 5 of IC201 to IC202(Pin26, 27).5) Check if ADC_BCK, ADC_LRCK & DAC_MCLK are entered from IC501 to IC202.6) Check if ADC_DATA is entered from IC202 to IC501. If there is no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.7) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one.8) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If an AMP is damaged, replace it with a new one


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IC602PS9850

PWM

IC801FS502B

BEAT BOX

AMP ICTAS5631

DAC_BCKDAC_LRCK

IC202CS5346

DAC_DATA DAC_MCLK

ADC_DATADAC_MCLK

IPOD_L/R

BEAT_DATA

< Signal check point >< iPod function signal fl ow >

3-26


NO SOUND There is no sound output in the PORT. IN FUNCTION, repair the set according to the following guide.

5-6. IN THE PORT. IN FUNCTION5-6-1. SolutionPlease check and replace IC202 on MAIN board.

5-6-2. How to troubleshoot (Countermeasure)1) Check PT_L/R signal from Main board to USB board.2) Check if PT_LR is entered from Pin1 & 3 of CN3U01 to Pin1 & 3 to CN502.3) Check POT_L/R signals to IC202(Pin21, 22).4) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.5) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.6) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one.7) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one


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PWM

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BEAT BOX

AMP ICTAS5631

DAC_BCKDAC_LRCK

IC202CS5346

DAC_DATA DAC_MCLK

POT. IN

ADC_DATADAC_MCLK

USBBoard

POT_L/R

BEAT_DATA

< Signal check point >< PORT. IN function signal fl ow >

3-27


NO SOUND There is no sound output in the TUNER FUNCTION, repair the set according to the following guide.

5-7. IN THE TUNER FUNCTION5-7-1. SolutionPlease check and replace IC202, TU101 on MAIN board.

5-7-2. How to troubleshoot (Countermeasure)1) Check if TUNER_LR is entered from Pin1 & 3 of T1U01 to IC202(Pin23, 24). If no signals, Check +3.3 V for Tuner power. Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC101 to TU101. If it doesnt work, replace TUNER with a new one.2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.4) Check the following I2S audio signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.5) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one.


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DAC_BCKDAC_LRCK

IC202CS5346

DAC_DATA DAC_MCLK

TUNER

ADC_DATADAC_MCLK

TUNER_L/R

BEAT_DATA

< Signal check point >< TUNER function signal fl ow >

3-28


NO SOUND There is no sound output in the MIC IN FUNCTION, repair the set according to the following guide.

5-8. IN THE MIC IN FUNCTION5-8-1. SolutionPlease check and replace IC603, IC605 on MAIN board.

5-8-2. How to troubleshoot (Countermeasure)1) Check MIC_SIG signal to Pin 27 of CN104. If no signal, Check the signal to Pin 3 of CN301 on the FRONT board. Check if the signal is entered from Pin3 of CN301 to MAIN board.2) Check if MIC_SIG is entered from Pin27 of CN104 to Pin3 to IC605 (MIC AMP).3) Check if the amplified signal is entered from Pin4 of IC605. If no signal output, check +12 V for IC605, replace IC605 with a new one if it has a problem.4) Check if MIC_BCK & MIC_LRCK is entered from IC507 to IC603 and DAC_MLCK from IC501 to IC603. Check if MIC_DATA is entered from Pin 9 of IC603I to Pin 7 of IC602. If no signal, check +5 V & +3.3 V for IC603. If it is abnormal, change replace it a new one.6) Check the following I2S signal flow from IC603 to IC602. If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one.7) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one.


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AMP ICTAS5631

DAC_BCKDAC_LRCK

IC603AK5358

DAC_DATA DAC_MCLK

MIC IN

MIC_DATADAC_MCLK

MICBoard

MIG_SIG

BEAT_DATA

IC605S4308

< Signal check point >< MIC IN function signal fl ow >

3-29

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD

YES

YES

YES

YES

YES

No output 3.7 / 5.6 VA

Power line of MAIN PCB is short.

Replace F901 (same fuse).

Replace D904.

Replace BD901.

Replace IC934.

Replace D933, D937.

NO

NO

NO

NO

NO

F901 normal?

D904 normal?

BD901 normal?

IC934 normal?

D933, D937 normal?

3-30


YES

YES

YES

YES

YES

No output 12 V

Power Line of Main PCB is short.

Replace F901 (same fuse).

Replace D904.

Replace BD901.

Replace D934, D935.

Replace IC931.

NO

NO

NO

NO

NO

F901 normal?

D904 normal?

BD901 normal?

D934, D935 normal?

IC931 normal?

3-31


YES

YES

YES

YES

No output FL+/FL-

Check soldering of PN901.

Check 3.3 V Output & P-CTRL.

Replace ZD931.

Replace D931, D932.

Replace FR931.

NO

NO

NO

NO

P-CTRL OK?

ZD931 OK?

D931, D932 OK?

FR931 short?

3-32


No AMP Output

Check soldering of CN902.

Check 3.3V & P-CTRL.

Replace ZD912, ZD913.

Replace D951, D952.

Replace D914/ Q900/ PC901.

Is theVCC supplied to

IC911 Pin7?

ZD912, ZD913 OK ?

D951, D952 OK ?

NO

NO

NO

NO

NO

P-CTRL OK?

Q901,D904 OK?

YES

YES

YES

YES

YES

3-33


Power on.

FRONT board OK.

Check FFC cable (Pin29).

Check SMPS board.

Check FFC cable.

Check MAIN board.

Check SMPS board.

Check MAIN board.

Replace DIG301.Q301, 303, 304grid voltage OK?

Replace LED (LD302 ~ LD322).

Check MAIN board.

HELODisplay on FLD

OK?

Volume LED(LD302~LD322)

Turn on?

When turn the volume, count is

change?

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

CN301cable connection

OK?

CN301 Pin18+12 V OK?

CN301 Pin13, 14signal OK?

CN301 Pin20, 21, 22 data signal

OK?

CN301 Pin27, 28, 29 power

OK?

CN301 Pin7, 9, 12I2C data OK?

2. SYSTEM PART

YES

YES

YES

YES

YES

YES

YES

YES

YES

3-34


CD FUNCTION

Check FFC cableto CN404, CN405.

Is motor_open/ close OK?(IC408 Pin9,10)

Check IC408.

PD(CN404 Pin5)about 180 mV?

Check IC301.

Check Loading motor.

Check IC501.

OPU driving (Focusing & Tracking) OK?

Check OPU.(Pick-up module)

Is motor impedanceabout 12 ?

IC407 Pin34,35,36 I2S output

signal OK?

Can disc insert?

IC501 Pin100,101,102 I2S input

signal OK?

Disc reading OK?


signal OK?

NO

NO

NO

NO

NO

NO

NO

NO

NO

IC407RF & Servo signal

OK?

Focusing/ Tracking/ Sled Signal

OK?

LOAD +- ok ?

YES

YES

YES

YES

YES

YES

NO

YES YES

YES

A

3. NO AUDIO PART

3-35


USB play

Check IC501.

Replace IC3U01.

IC501 Pin116,117 USB_D output

signal OK?

NO

NOIC3U01USB power +5 V

OK?

YES

A

A

When insert USB,IC502 Pin1,2,3,4 USB_D

signal OK?

NO

YES

YES

YES

YES

YES

AUX

Check audio cable.

Replace IC202.

Check IC501.

NO

NO

NO

IC202 Pin7,8 AUX input signal

OK?

IC202 Pin41 ADC data output signal

OK?

IC202 Pin42,43,44 I2S input signal

OK?

3-36


iPod

Check IC501.

Replace IC202.

Check USB_VBUS of IC203.


OK?

IC202 Pin41 ADC data output

signal OK?

NO

NO

NOIC203 Pin4 USB_VBUS 5 V

OK?

YES

A

A

IC202 Pin25,26 iPod input signal

OK?

NO

YES

YES

YES

YES

YES

YES

POT. IN

Check USB board.

Replace IC202.

Check IC501.

NO

NO

NO

IC202 Pin21,22 POT. IN input signal

OK?

IC202 Pin41 ADC data output signal

OK?


OK?

3-37


TUNER

Check IC501.

Replace IC202.

Check +3.3 V of TU101.


signal OK?

IC202 Pin41 ADC data output

signal OK?

NO

NO

NOTU101 TUNER_L/R output

signal OK?

YES

A

IC202 Pin21,22 TUNER_L/R input

signal OK?

NO

YES

YES

YES

3-38


B

A

YES

YES

YES

YES

YES

YES

YES

Replace IC501.

Replace IC507.

Check IC507.

Check IC501.

Check IC501.

Check IC501.

Check IC801.

NO

NO

NO

NO

NO

NO

NO

IC501 Pin83,87,88 I2S data output

signal OK?

IC507 Pin7,14 BEAT_LRCK/BCK output

signal OK?

IC507 Pin2,17 DAC_BCK/LRCK input

signal OK?

IC501 Pin83 BEAT_DAC_DATA output

signal OK?

IC801I2S input signal

OK?

IC501 Pin83 BEAT_DAC_DATA output

signal OK?

IC801BEAT_DATA output signal

OK?

3-39


4. DIGITAL AUDIO AMP CHECK

B

Check SMPS.

Check speaker cable connection.

Replace IC602.

Check IC801 & IC501.

Check L701, L702, L704, L705. Check L708, L709, L710. Check L711, L714, L715, L717.

Check IC602.

Replace IC701. Replace IC702. Replace IC703.

Check IC602.

+12 VA, +48 VPower voltage OK?

IC602PWM data output signal

OK?

IC602I2S input signal

OK?

IC701FL/FR input signal

OK?

IC701SPK_FL/FR output

OK?

IC703RL/RR input signal

OK?

IC703SPK_RL/RR output

OK?

IC702SW1/SW2 input signal

OK?

IC702SPK_SW output

OK?

NO

NO NONO

NO

NO

NO NO

YES

YES

YES

YES YES YES

YES

YES YES YES

YESYES

OK

3-40

WAVEFORMS

1. WAVEFORM OF SP- & SP+ FOR DRIVING SPINDLE MOTOR

3. WAVEFORM OF TUR_M+ & TUR_M- FOR DRIVING TRAY MOTOR

4. WAVEFORM OF LO- & LO+ FOR DRIV-ING PICKUP MODULE UP/DOWN MOTOR

2. WAVEFORM OF SL- / SL+ FOR DRIVING SLED MOTOR

zwR

zwT

{|ytT

{|ytR

ZUY}

tv{jsvzl

tv{vwlu

svR

svT

zsR

zsT

3-41

5. WAVEFORM OF RF SERVO

7. WAVEFORM OF BEAT BOX IC'S POWER SEQUENCE

8. WAVEFORM OF VFD GRID CUR-RENT DRIVER

6. WAVEFORM OF I2S SIGNAL TO BEAT BOX IC (IC801)

w~yj{ys

ZUZ}Oilh{P

ilh{w~y

joXayZY^O{wZW[PjoYaxZWXGl

khjtjsr

ilh{ijr

ilh{kh{h

ilh{syjr

3-42

9. WAVEFORM OF USB_D

kT

kR

3-43 3-44

670'4+0

.+0'176

#WFKQ

%0

/#+02%$

(. (4 4459 594.

%0

%0

%0

%0

%0

%0

+21&+2*

10'

/&/'%*#

%07

%08

%0

(41062%$ 5/252%$

%0

/&2+%-72

%0

/&59

+6%*

%0

%0

75$2%$

10P15P

25P

16P

18P

14P

15P 29P

WIRING DIAGRAM

3-45 3-46

BLOCK DIAGRAMS1. OVERALL BLOCK DIAGRAM

IC407BU9543KV

RF+ SERVO DSP

IC408S3053Motor Drive

A,B,C,D,E,F

PD

LD

USB_Ds

IC200CS5346

DAC_BCK/LRCK

ppwvkk

SPINsSLEDs

TUR IC501

MLC9800 MCS LOGIC

DAC_MCLK

M SPDO/SLDO/FOD/TRD

mV{y

TUR_Ms

LOADs

IC406S8082

OPEN/CLOSE/LIMIT/UPDN/D_SENSE

MOT_MUTE/CLOSE/OPEN

ADC_DATAIC502 SDRAM

IC503 FLASH

M00_15/A00_16

DRM_WEN/CAS/RAS/SEL/CLK/CKE

SF_DI/DO

SF_CS/SCK

IC251NJM2794ADC_EDID_PWM_DATA/CLK

IPOAUDIO L/R

IPOD_PCTRL/RX/TX/DET/READAY

POT_L/R

P/UP

TU101TUNER

VFDDIG301

MICOM_CS/DO/DI/CLK/MAIN_RESET

AUX_L/R

IC101MICOM

LC87F085

TUNER_SCLK/SDIO/RST/GPIO2/SEN

VFD_STB/CLK/DO/RST

IC100EEPROM

CLK/DATA

IC602PS9850

PWM

REMOCON/KEY/

IC501S4308

MIC IC603AK5358

MIC_SIG SDOUT1

FL

FR

F/L

AMP_PDNAMP_OTW/SD/CLIP/READY

F/R

SPEANA

DRV603AUDIOOUT

AUDIO OUT_L/R

AUX

IC701AMP IC

TAS5631

USB1

POT. IN

CD

_DIN

_DO

UT

CD

_R/W

BUSY

; CD

_16M

SU

BS

YQ;

CD

_RST

CD_M

CK/B

CK/L

RCK/

DAT

A

TUNER_L/R

IC504CP forIPODCP_RESET/SCL/SDA

IPO L/R

IC801FS503B

BEAT BOXLBT_RX/TX/RST

USB_RESET/SCL/SDA

USB HUBUSB2512B

USB2

R/L

R/R

IC702AMP IC

TAS5631

SW1

SW2

IC702AMP IC

TAS5631

LBT_DATA 300Wx2

150Wx2

300Wx2

RL

RR

SW1

SW2

LBT_BCK /LBT_LRCK

kljrGGtljohupzt

USB2USB1

LBT_

DA

TA

LBT_

CLK

iPod

3-47 3-48

2. SMPS BLOCK DIAGRAM

DigitalPowerAMP

FL

FR

SW

C

SL

SR

TRANS

MAIN&

AMP

FilterSection

(Varistor, Resistor,Line Filter

Thermistor)

Rectifier Circuit(Bridge,

CAPACITOR)

AMP Power &

UC3844 for Main Power

FET

[U\}

ZY

XY}

\U]}

ZU^}h

[_}

AC

Snubber

msORVTP

}rr

STR-A6252 forMain Power

MAINTRANS

pwvkGVG|ziGVGtwlnVGkjkj

vwhtwVmhu

}mk

}mk

|Tj

wTj{ys

3-49 3-50

+12V

SMPS

+3.7VA

+5.6V

SPEANAQ601

IC605MIC AMP

S4308 FANQ701

IC102RESETKIA7027

D102D104

IC101U_COM

IC601LDO

TJ3965D

TU101TUNERYST996

IC103PWR SENS

IC100EEPROM24CS16

IC602PWM

PS9850

IC603ADC(MIC)AK5358A

IC201IPOD AMPNJM2794

IC501MCS

MLC9800

IC502SDRAM

EM638165

IC503FLASH

MX25L8005

IC506CP2.0B

Q405

IC407RF

BU9543KV

Q406

+1.8V

+3.3V

VCC12 IC509KIA1112F

IC504USB HUBUSB2512A

IC701/702/703POW AMPTAS5631

FRONT LED9EA x 2

VOLUME LED9EA

DIG301VFD

RMC301REMOCON

IC50774AHC244

IC401TJ3965D

IC801BEAT BOXFS-503B

IC802TJ3965D

VCC12A

IC803BOOT

FLASH 16MB

IC805BEAT SOURCEFLASH 32MB

WOOFEREXTENDERx2

12VA

IC505 278P33

IC203 IPOD PWRLM39102D

IC3U01USB PWRLM39102D

IC408MOTORAM3053S

IC406MOTORS8082

ADCIC202

CS5346

VCC33

+5V IC604DRV603

+3.3V(ADC)

+3.3V(CD)

+3.3V(RF)

+3.3V(USB)

+3.3V(BEAT)

IC80674AHC244

IC80774AHC244

D301

IC5058TJ3965D

+48VIC701/702/703AUDIO AMP

TAS5631

+3.3V(CD)

FL DIG301

D101

D302

3. POWER BLOCK DIAGRAM

3-51 3-52

CIRCUIT DIAGRAMS1. SMPS CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG CORPORATION. ALL COMPONENTSSHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL

COMPONENTS ARE SHADED ON THE SCHEMATICFOR EASY IDENTIFICATION.THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SET IS NOT DELAYED UNTIL THE NEW SERVICELITERATURE IS PRINTED.

NOTE :1. Shaded( ) parts are critical for safety.

Replace only with specified part number.2. Voltages are DC-measured with a digital voltmeter

during Play mode.

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

CAUTION: Danger if fuse is incorrectly replaced.

Replace only with the type identical to fuse rating and(or) model name described in main label.

WarningParts that are shaded are critical withrespect to risk of fire or electrical shock.

SMPSEBY32630703 Rev 3.1

2010.11.09

3-53 3-54

2. MICOM CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


-COMEBY60990001(#1) Rev 7.4

2011.05.12

3-55 3-56

3. PWM CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


PWMEBY60990001(#2) Rev 7.4

2011.05.12

3-57 3-58

4. AMP CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


AMPEBY60990001(#3) Rev 7.4

2011.05.12

3-59 3-60

5. DSP CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


DSPEBY60990001(#4) Rev 7.4

2011.05.12

3-61 3-62

6. RF SERVO CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


RF SERVOEBY60990001(#5) Rev 7.4

2011.05.12

3-63 3-64

7. ADC CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


ADCEBY60990001(#6) Rev 7.4

2011.05.12

3-65 3-66

8. BEAT BOX CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


BEAT BOXEBY60990001(#7) Rev 7.4

2011.05.12

3-67 3-68

9. VFD CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


VFDEBY61172601 Rev 2.1

2011.01.25

3-69 3-70

10. VOLUME CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


VOLUMEEBY61172701 Rev 2.1

2011.01.25

3-71 3-72

11. USB CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


USBEBY61172801 Rev 2.3

2011.01.25

3-73 3-74

12. IPOD CIRCUIT DIAGRAM

A

1

2

3

4

5

6

7

8

9

10

11

12


IPODEBY60990101 Rev 3.2

2010.11.09

3-75 3-76

13. MIC CIRCUIT DIAGRAM (OPTIONAL PART)

A

1

2

3

4

5

6

7

8

9

10

11

12


MICEBY60990701 Rev 3.2

2010.11.09

CIRCUIT VOLTAGE CHART1. HOW TO CHECK THE VOLTAGE

2. MAJOR ICs

3-77 3-78

No.Location /

DescriptionSupply Voltage

Pin No.Source Spec / Rating Measured voltage

1IC501

MLC9800

13,47,94-VDD12 1.2V 1.08~1.32V 1.18V

30,51,84,113-IO-VDD33

3.3V 3.0~3.6V 3.26V

120-PLL1VDD12 1.2V 1.08~1.32V 1.18V

124-PLL2VDD12 1.2V 1.08~1.32V 1.18V

122-PLL3VDD12 1.2V 1.08~1.32V 1.18V

115-USBVDD33 3.3V 3.0~3.6V 3.26V

14,48,95-VSS12 3.3V 3.0~3.6V 3.26V

3,52,85,109,114-IO-VSS33

1.2V 1.08~1.32V 1.18V

119-PLL1VSS12 3.3V 3.0~3.6V 3.26V

123-PLL2VSS12 1.2V 1.08~1.32V 1.18V

121-PLL3VSS12 1.2V 1.08~1.32V 1.18V

3-AVSS33 3.3V 3.0~3.6V 3.26V

118- USBVSS33 3.3V 3.0~3.6V 3.26V

2IC101

LC87F085NC8AVDD1,VDD2,VDD3,VDD4

3.3V 2.8~5.5V 3.37V

3IC100

S-24CS16VCC 3.3V 2.7~5.5V 3.37V

4IC602

PS9850

VDD_IO 3.3V 2.97~3.63V 3.31V

VDD_CORE 1.2V 1.08~1.32V 1.25V

VDD_VIN1 3.3V 2.20~3.30V 3.30V

VDD_VIN2 3.3V 2.20~3.30V 3.30V

VDD_A 1.2V 1.08~1.32 1.25V

5IC603

AK5358

VA 5V 6.0V MAX 5.11V

VD 3.3V 4.6V MAX 3.31V

6IC605S4308

VCC 12V 4.5~12V 11.25V

7IC604

DRV603VDD 5V 3~5.5V 5.1V

No.Location /

DescriptionSupply Voltage

Pin No.Source Spec / Rating Measured voltage

8IC701

TAS5631

PVDD_X 48V 25~52.5V 47.7V

GVDD_X 12V 10.8~13.2V 11.91V

VDD 12V 10.8~13.2V 11.91V

9IC502

EM638165TS-6GVDD,VDDQ 3.3V 3.0~3.6V 3.27V

10IC503

M25L1605D2I-12GVDD 3.3V 4.6V MAX 3.27V

11IC507

TC74VHC244FTVCC 3.3V 2.0~5.5V 3.27V

12IC506

CP ChipVCC 3.3V 7.0V MAX 3.27V

13IC504

USB2512AVDD33 3.3V 3.0~3.6V 3.26V

14IC505

278R33VOUT 3.3V - 3.28V

15IC407

BU9543KV

VDD 3.3V 2.7~3.6V 3.27V

VCORE 1.5V 1.4~1.65V 1.58V

16IC408S3053

VCC1, VCC2 5V 4.3~13.2V 5.10V

17IC406S8082

SVCC, PVCC 5V 4.3~13.2V 5.10V

18IC202

CS5346

VA 5V 4.75~5.25V 5.11V

VD 3.3V 3.13~3.47V 3.27V

VLS 3.3V 3.13~3.47V 3.27V

VLC 3.3V 3.13~3.47V 3.27V

19IC203

LM39102DVOUT 5V - 5.12V

20IC201

NJM2794RB2VCC 12V 4.3~13V 11.93V

21IC204

LM39102DVOUT 5V - 5.13V

22IC801

FS-503B

VDDK 1.2V 1.4V MAX 1.19V

VDDE 3.3V 4.0V MAX 3.27V

23IC803

M25L1605D2I-12GVDD 3.3V 4.6V MAX 3.27V

24IC806

TC74VHC244FTVCC 3.3V 2.0~5.5V 3.27V

25IC807

M25L1605D2I-12GVDD 3.3V 4.6V MAX 3.27V

26IC807

TC74VHC244FTVCC 5V 2.0~5.5V 5.12V

27IC807

KIA1112FVOUT 1.2V - 1.19V

28IC301

BU2090VDD 3.3V 7.0V MAX 3.66V

29IC302

BU2090VDD 3.3V 7.0V MAX 3.66V

30IC3U01

LM3912DVOUT 5V - 5.11V

Turn the SMPS board over with cable connected and check the voltage.

3. CAPACITORS ON MAIN BOARD 4. CAPACITORS ON SMPS BOARD

3-79 3-80

No. Location Value Capacitor (uF) Voltage Spec. Measured voltage

01 C111 47uF 16V 3.37V

02 C145 2.2uF 16V 3.37V

03 C124 1000uF 6.3V 3.38V

04 C109 1000uF 6.3V 3.38V

05 C808 47uF 16V 1.19V

06 C529 100uF 16V 3.30V

07 C530 470uF 16V 5.66V

08 C531 470uF 16V 5.65V

09 C533 470uF 16V 3.28V

10 C706 10uF 16V 11.92V

11 C746 10u 16V 11.92V

12 C786 10uF 16V 11.92V

13 C713 470uF 100V 47.7V

14 C734 470uF 100V 47.7V

15 C753 470uF 100V 47.7V

16 C774 470uF 100V 47.7V

17 C793 470uF 100V 47.7V

18 C784 470uF 100V 47.7V

19 C527 47uF 16V 1.19V

20 C550 47uF 16V 1.19V

21 C570 10uF 16V 3.27V

22 C525 47uF 16V 3.27V

23 C482 100uF 16V 1.65V

24 C462 47uF 16V 3.27V

25 C467 3.3uF 50V 1.65V

26 C492 47uF 16V 3.27V

27 C405 470u 16V 1.57V

28 C4H6 100uF 6.3V 1.57V

29 C406 100uF 6.3V 3.27V

30 C485 220uF 16V 5.11V

31 C221 100uF 16V 3.28V

32 C235 10uF 16V 5.7V

33 C231 47uF 16V 5.1V

34 C221 100uF 16V 5.1V

35 C210 10uF 16V 2.55V

36 C660 47uF 16V 3.31V

37 C657 47uF 16V 5.12V

38 C655 10uF 16V 2.56V

39 C681 1uF 50V .3V

40 C679 100uF 16V 11.25V

41 C676 22uF 16V 1.96V

42 C122 100uF 16V 3.31V

43 C620 100uF 6.3V 1.25V

44 C621 1000uF 6.3V 3.30V

45 C682 1000uF 6.3V 3.30V

46 C601 100uF 16V 3.31V

47 C3U25 100uF 16V 5.1V

No. LocationValue Capacitor

(uF)Voltage Spec.

100V-10% 240V/50Hz+10%

Measured voltage Measured voltage

01 C903 1000uF 315V 122.3V 190V

02 C904 1000uF 315V 123.9V 180.7V

03 C905 47uF 450V 245.9V 370.1V

04 C912 47uF 50V 18.47V 18.59V

05 C914 47uF 50V 12.68V 13.8V

06 C908 47uF 50V 15.34V 15.33V

07 C931 330uF 16V 4.81V 4.8V

08 C932 100uF 50V 31.96V 31.98V

09 C933 1000uF 16V 5.75V 5.75V

10 C935 1000uF 25V 12.63V 12.62V

11 C942 100uF 16V 11.99V 11.98V

12 C953 2200uF 80V 47.9V 48.1V

3-81 3-82

PRINTED CIRCUIT BOARD DIAGRAMS1. MAIN P.C.BOARD(TOP VIEW)

3-83 3-84

MAIN P.C.BOARD(BOTTOM VIEW)

3-85 3-86

2. SMPS P.C.BOARD

Rev 4.1

NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock.

3-87 3-88

EAX64004201 Rev 2.3

3. VFD P.C.BOARD(BOTTOM VIEW)

3-89 3-90

4. VOLUME P.C.BOARD

3-91 3-92

7. MIC P.C.BOARD (OPTIONAL PART)

6. IPOD P.C.BOARD(TOP VIEW) (BOTTOM VIEW)

5. USB P.C.BOARD(TOP VIEW) (BOTTOM VIEW)

MEMO MEMO

3-93 3-94

#EV##EV##EV##EV##EV##EV#

Diagrma de Modular LG MCV1306

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