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Service Manual
Model #: VIZIO P50HDTV10A
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Table of Contents
CONTENTS PAGE
Sections
1. Features 1-1
2. Specifications 2-1
3. On Screen Display 3-1
4. Factory Preset Timings 4-1
5. Pin Assignment 5-1
6. Main Board I/O Connections 6-1
7. Theory of Circuit Operation 7-1
8. Waveforms 8-1
9. Trouble Shooting 9-1
10. Block Diagram 10-1
11. Spare parts list 11-1
12. Complete Parts List 12-1
Appendix
1. Main Board Circuit Diagram
2. Main Board PCB Layout
3. Assembly Explosion Drawing
Block Diagram
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VINC Service ManualVIZIO P50HDTV10A
COPYRIGHT 2000 V, INC.ALL RIGHTS RESERVED.
IBM and IBM products are registered trademarks of International Business MachinesCorporation.
Macintosh and Power Macintosh are registered trademarks of Apple Computer, Inc.
VINC and VINC products are registered trademarks of V, Inc.
VESA, EDID, DPMS and DDC are registered trademarks of Video Electronics StandardsAssociation (VESA).
Energy Star is a registered trademark of the US Environmental Protection Agency (EPA).
No part of this document may be copied, reproduced or transmitted by any means for anypurpose without prior written permission from VINC.
FCC INFORMATION
This equipment has been tested and found to comply with the limits of a Class B digital device,pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonableprotection against harmful interference in a residential installation. This equipment generates,uses and can radiate radio frequency energy, and if not installed and used in accordance withthe instructions, may cause harmful interference to radio communications. However, there isno guarantee that the interference will not occur in a particular installation. If this equipmentdoes cause unacceptable interference to radio or television reception, which can bedetermined by turning the equipment off and on, the user is encouraged to try to correct theinterference by one or more of the following measures -- reorient or relocate the receiving
antenna; increase the separation between equipment and receiver; or connect the into anoutlet on a circuit different from that to which the receiver is connected.
FCC WARNINGTo assure continued FCC compliance, the user must use a grounded power supply cord andthe provided shielded video interface cable with bonded ferrite cores. Also, any unauthorizedchanges or modifications to Amtrak products will void the users authority to operate thisdevice. Thus VINC Will not be held responsible for the product and its safety.
CE CERTIFICATIONThis device complies with the requirements of the EEC directive 89/336/EEC with regard toElectromagnetic compatibility.
SAFETY CAUTIONUse a power cable that is properly grounded. Always use the AC cords as follows USA (UL);Canada (CSA); Germany (VDE); Switzerland (SEV); Britain (BASEC/BS); Japan (Electric
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Chapter 1 Features
y Wall-mountable
y New WIDE HD Plasma Panel:1366 x 768 (H x V)
y TruSurround XT sound system and DCDi by Faroujia video image
y High definition digital interface HDMI
y HDCP supportive
y Multiple-screen display (picture-on-picture/picture-in-picture)
y Selectable picture mode
y 3-language On Screen Display
y 2 S-video and Composite video inputs
y 2 Component video inputs
y 2 HDMI inputs
y 6 audio stereos, 1 PC Mini-Jack
y Supporting DVI converted to HDMI
y Closed caption
y Gloss front bezel
y
The thinnest model of this size: 99 mm
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Chapter 2 Specification1. OPTICAL CHARACTERISTICS
Item Specification Note
Display Pixels 1366 (H) x 768 (V) pixels
Display Cells 3,072 (H) x 768 (V) cells
Pixel Pitch 0.810 mm (H) X 0.810mm (V)
Pixel Type Non-stripe
Color Depth 1,024 (R) x 1,024 (G) x 1,024 (B) colors
Active Display Area 1106.5 mm (H) x 622.1 mm(V)
Brightness (panel spec) 1000 cd/m2 (Typical)
(w/glass filter) Min.280 cd/m
2
Contrast ratio (panel spec) 8000:1 (Typical, dark room)
Color Coordinates (typical)
White (Panel spec) x=0.3000.02, y=0.3000.02
White (w/glass filter) Warm (5400K)
Standard (6500K)
Cool (9300K)
User: x=0.2800.03, y=0.2800.03 RGB
2. INPUT SOURCE
RGB Signal H: support to 30-80KHz
V: support to 60-85Hz
Pixel Clock: support to 108MHz
HDMI Signal H: 15.734KHz V: 60Hz (480i)
H: 31KHz V: 60Hz (480p)
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Composite Video signal: H: 15.734KHz V: 60Hz (NTSC)
Component signal: YPbPr/YCbCr
H: 15.734KHz V: 60Hz (NTSC-480i)
H: 31KHz V: 60Hz(NTSC-480p)
H: 45KHz V: 60Hz(NTSC-720p)
H: 33KHz V: 60Hz(NTSC-1080i)RF Connector
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3. INPUT CONNECTORS
Input Label Connector Type Input Label Connector Type
SERVICE1 RJ-11 x 1 COMPONENT1 YPb/Cb Pr/Cr RCA Jack x
3 Audio RCA Jack x 2
SERVICE2 RJ-11 x 1 COMPONENT2 YPb/Cb Pr/Cr RCA Jackx 3
Audio RCA Jack x 2
HDMI1 19 pin HDMI x 1
Audio RCA Jack x 2
AV1 RCA Jack (CVBS) x 3
S-video 4 pin mini DIN x 1
HDMI2 19 pin HDMI x 1
Audio RCA Jack x 2
AV2 RCA Jack (CVBS) x 3
S-video 4 pin mini DIN x 1
RGB PC D-sub 15 pin x 1
Mini Jack x 1 (Audio
input)
DIGITAL
AUDIO OUT
1x SPDIF Digital Audio
(Optical)
DTV/TV RF x 1(Combo, F
Connector for internal
ATSC/QAM/NTSC
Tuner)
4. OUTPUT CONNECTORS
a. Audio RCA Jack x 2
b. 3.5mm Mini-jack earphone x 1
c. SPDIF Digital Audio Out (Optical)
5. POWER SUPPLY
Consumption: 550W MAX Power OFF: less than 3W
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7. ENVIRONMENT
Operating
a. Temperature: 0~40
b. Relative humidity: 20%~80% RH
c. Altitude: 0~6,560 ft
Non-operating
a. Temperature: -20~60
b. Relative humidity: 10%~90% RH
c. Altitude: 0~9,840 ft
8. DIMENSIONS
a. Height: 871 mm
b. Width: 1241mm
c. Depth: 310 mm (with standard), 99 mm (without standard)
9. WEIGHT
a. Net 54.5 +/- 1.5 kgs
b. Gross 65.0 +/- 2.0 kgs
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Chapter 3 On Screen Display
Main unit button
Buttons 1 2 3 4 5 6 7
Name MENU CH+/ CH-/ VOL+/ VOL-/ INPUT
OSD Adjustment
Main OSD Tree
Mode
Image Settings
VIDEO
Picture Mode
(Custom,vivid,
Movie,Game,Sport)
VIDEO Brightness(0~100)
VIDEO Contrast(O~100)
VIDEO Saturation(0100)
VIDEO Hue(-50~50)
VIDEO Sharpness(0~24)
VIDEO Advanced
VIDEO Noise Reduction
VIDEO Motion(0~16)
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Mode
VIDEO Custom Color
VIDEO Red(0~100)
VIDEO Green(0100)
VIDEO Blue(0~100)
PC Auto Adjustment
PC lmage Position
PC Phase
PC CIocks/Line
PC Color Temp
PC Warm(5400K)
PC Standard(6500K)
PC Cool(9300K)
PC User
PC Red(0~100)
PC Green(0100)
PC Blue(0~100)
Display Settings
VIDEO Aspect Ratio
16:94:3Zoom
Panoramic*
PC A t R ti 16 9 4 3
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Mode
Bottom-Left,
Bottom-Right
PIP Input **
Audio Settings
Bass(0~20)
Treble(0~20)
Balance(-10~10)
SRS TS XT(On,Off)
Auto
Volume(On,Off)
Speakers(On Off)
Audio Out*** Fixed Volume Variable Volume
Parental Controls
VIDEO Password
VIDEO Settings
VIDEO TV Rating
VIDEO TV Youth
(UnblockedBlocked)
VIDEOTV Youth 7
(UnblockedBlocked)
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Mode
Blocked)
VIDEO
TV MA (Unblocked
Blocked)
VIDEO Unblocked
VIDEO Movie Rating
VIDEOMovie G
(UnblockedBlocked)
VIDEO
Movie PG
(Unblocked
Blocked)
VIDEO
Movie PG-13
(Unblocked
Blocked)
VIDEO
Movie R
(Unblocked
Blocked)
VIDEO
Movie NC-17
(Unblocked
Blocked)
Movie X
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Mode
VIDEOChange
Password
VIDEOPlease enter new
password
VIDEOPlease re-enter
new password
VIDEOClear All
(No,Yes)
Setup
Closed Caption
Display
CC1, CC2, CC3,
CC4, TEXT1,
TEXT2, TEXT3,
TEXT4
Captions on mute On, Off
LanguageEnglish, French,
Spanish
Factory Reset
(No,Yes)
Image Cleaner
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Mode
TV Cable/Antenna
DTV DTV Menu
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DTV Menu
DTV Menu
A.DTV Tuner
Setup
a.Time Zone
1.Hawall
2.Eastern Time
3.Indiana
4.Central Time
5.Mountain Time
6.Arizona
7.Pacific Time
8.Alaska
b.Cable/Air/Auto
c.Scan****
d.Manual Scan****
Scan mode
Add-on Mode
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DTV Menu
1.PCM
2.OFF
3.Dolby Digital
B.Closed
Caption
a.Analog Closed
Caption CC1~CC4OFF
b.Digital Closed
CAPTION
Service1~Servic
e6OFF
c.Digital Closed
Style
1.As Broadcaster
2.Custom
(1)Font Size
Large
Small
Medium
(2)Font Color
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DTV Menu
Cyan
Yellow
Magenta
(3)Font Opacity
Solid
Translucent
Transparent
(4)Background
Color
Black
White
Green
Blue
Red
Cyan
Yellow
Magenta
(5)Background
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DTV Menu
Black
White
Green
Blue
Red
Cyan
Yellow
Magenta
(7)Window
Opacity
Solid
Translucent
Transparent
Parental
control
C. Password
Channel Block
* HDMI and Component 720P/1080i inp ts do not s pport Panoramic
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SUB
MAIN
DT
VTV AV1 AV2 Component 1 Component 2
RG
BHDMI 1 HDMI 2
DTV 9 9 9 9 9 9 9
TV 9 9 9 9 9 9 9
AV1 9 9 9 9 9 9 9 9
AV2 9 9 9 9 9 9 9 9
Component 1 9 9 9 9 9 9 9 9
Component 2 9 9 9 9 9 9 9 9
RGB 9 9 9 9 9 9 9 9
HDMI 1 9 9 9 9 9 9 9 9
HDMI 2 9 9 9 9 9 9 9 9
Remark
(1) 9 Indicates which inputs are available for PIP and POP modes.
(2) For AV1 and AV2, S-Video has priority. If a signal is connected to AV1 S-Video by itself
or signals are connected to AV1 S-Video and AV1 Video simultaneously, then S-Video
will be the only choice for AV1. If a signal is connected to AV1 Video only, then Video
will be the only choice for AV1. The same input priority scheme applies to AV2.
*** When Speakers off
**** Do Scan or Manual Scan function, it maybe spend several minutes is normal. It
depends on channels and area
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Chapter 10 PDP Trouble Shooting
A. SYSTEMOVERVIEW
Power supply board
Y driver board
X driver board
Main board
EMI filter
IR board
Display board
ATSC Board
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B. PCBPARTSNAME/NUMBERANDFUNCTIONDESCRIPTION
PART NAME PART NUMBER FUNCTION DESCRIPTION
POWER SUPPLY BOARD PROVIDE ALL THE POWER FOR TV SET
X DRIVER BOARD X ELECTRODE DRIVING BOARD
Y DRIVER BOARD Y ELECTRODE DRIVING BOARD
AUDIO POWER SELECTOR AUDIO POWER SUPPLY(+30V OR +24V)
MAIN BOARD 385000120150 CONNECTING TO TRANSFER DISPLY SIGNAL
TO PDP SET, AMPLIFIER THE AUDIO SIGNAL TO
THE SPEAKER
IR BOARD 385000120189 RECEIVE THE REMOTE CONTROLER AND DISPLAY
SYSTEM STATUS LED
DISPLAY BOARD 385000120156 KEYPAD FUNCTION FOR MANUAL OPERATE TV
ATSCBOARD 385000120187 DTV/TVMODLE
C. BOARDPICTURE
MAIN BOARD
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DISPLAY BOARD
IR BOARD
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ATSCBOARD
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PDPDISPLAYNOTHING
1. Main board & ATSC board block diagram
U23 M61323FPVEDIO SW
CH4_R/L
VGA_AUDIO_L/R
I2CCM
U42 Sil 9011HDMI RS
Y1/C1
3 ATXD_HUD
ATXD_HUD
W1
COMP2_Audio_R/L
JTAG_BS_TCK/TDO/TMS/TDI/TRST
U35 Sil 9011HDMI RS
CVBS1
MSTR2_SCL/MSTR2_SDA
51_RXD/51_TXD
Analoginput
XU1 A29LV320DMEMERY_CTZ
B1_CTZ/C1_CTZ
1
IPCLK1/BHS/BVS/BDE
U37 CS3443
HDMI2 LR DAC
ATXD
COMP1_Audio_R/L
JTAG_BS_TCK/TDO/TMS/TDI/TRST
HDMI1 AUDIO
CVBS2
AudioAV1_R/L
TDA8946ADAUDIO_AMP
B1_HUD/C1_HUD
IPCLK0/AHS/AVS/AHREF_DE
U32 P4450G
AUDIO
PROCESS
ARXD
A2/B2/C2_CTZ
CN17
AudioAV1_R/L
W8
SV3_CTZ/A1_CTZ
Lineout_R/L
U36 CS3443HDMI1 LR DAC
IPCLK0/AHS/AVS/AHREF_DE
U26 MAX232A
U21 24LC02EEPROM VGA
J10
BDATA[0:23]
U12 SST25VF040FLASH 512K HUD
SV3_HUD/A1_HUD
HLIN/HRIN
U37 24LC02EEPROM HDMI1
FL8125_HUD
U45 74HCT14Inverting Schmitt Trgger
J9
BDATA[0:23]
A2/B2/C2_HUD
SV2_CTZ
Frame StoreDDR Interface
W14
1
SCL-33V / SDA-33V
U28 MAX4550AUDIO SW4/2 I/O
MSTR0_SCL/MSTR0_SDA
2 WireController
A2/B2/C2
U46 IDTQS3253HDMI1 AUDIO SW
U40 24LC02EEPROM HDMI2
KEY PADCN5
SV2_HUD
Digital BInput
U11 24LC32EEPROM HUD
ADATA[0:23]
W11
NTSC CVBS(SV1_HUT)
2 WireController
A3/B3/C3_HUD
FL8532_CTZ
U42 IDTQS3253HDMI1 AUDIO SW
U20 4052I/O SW
SV4_CTZ
BDATA[0:23]
Digital AInput
J8Speaker L
W7
51_RXD/51_TXD
ARXD_HUD
NTSC CVBS(SV1_CTZ)
OCM ExternalSRAM
3
A3/B3/C3_HUD
2 WireController
SV4_HUD
ADATA[0:23]
JTAG BoundaryScan
U25 F75373SATXD
U33 PT2308AUDIO DRIVERW5
IPCLK1/BHS/BVS/BDE
Y Pr Pb
A3/B3/C3_CTZ
J7Speaker R
Frame StoreDDR Interface
U38SST89C58
JTAG BoundaryScan
CN16
NC7SB3157U18 BUS SW
ATXD_HUD
U34 PT2308AUDIO DRIVER
2
ATSC YPr Pb
A3/B3/C3_CTZ
CN13
U40 24LC128
EEPROM(8051)
Analoginput
GPIO
U24 M61323FPVEDIO SW
HY5DU56822CT-D4U16 DDR RAM HUD
ARXD
UART
MSTR2_SCL/MSTR2_SDA
Y Pr Pb
A4/B4/C4_HUD
CN12
GPIO
W6
HDMI2_AUDIO_L/R
HY5DU56822CT-D4U17 DDR RAM CTZ
Serial ROMInterface
MSTR1_SCL/MSTR1_SDA
W10
VS / HS
A4/B4/C4_CTZ
AudioAV2_R/L
IPCLK1/BHS/BVS/BDE
HDMI1_AUDIO_L/R
LVDSDisplay
Interface
MSTR1_SCL/MSTR1_SDA
Display
W13
R G B
VGA_SCL / VGA_SDA
A4/B4/C4
AIR_RAW_HS_CS/AIR_RAW_VS
U22 M61323FPVEDIO SW
ANLOG DDC
AudioAV1_R/L
UC_SCL/UC_SDA
LVDS
DisplayInterface
CH3_R/L
AIR_RAW_HS_CS/AIR_RAW_VS
2 WireController
VGA_SCL / VGA_SDA
Y2/C2
UART
2
ARXD_HUD
ARXD_HUD
HDMI2 AUDIO
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PDP DISPLAY NOTHING(Analog HD1/AC on/off default)
Power LED is lighting?
Start
No
Yes
Check AC power cord
No
Press Meun or Info.Is there any OSDs logo
Power LED is lighting?
No
Check U3.43.3V
No
D10,D11 LED is lighting?
Check internal cable?
1.LVDS cable.
Panel power
fail
U3 fail
Check U81.8V
Check U92.5V
No
U8 fail
No
U9 fail
If power_offhigh
U2,U5 ON
Check +3.3V_SW
,+5V_SW,+12V_SW
(pin 5,6 and pin 7,8)
No
U2,U5 fail
Check Fuse open?
(F2,F3,F4)
Fuse fail
Yes
No
Yes
U13 fail
No
Yes
Check input source
Check internal cable?
1.CN1s cable
2.CN3s cable
No
Check main board CN3 pin 4 studyby+5V
Check CN3 pin 3 RLY_ON(high)
Check CN3 pin 2 VS_ON(high)
YseCheck CN1pin 1,2,3 = +5V
pin 7,8 = +12V
NoNo
Yes
No
Power LED is lighting?
NoCheck W1 pin 27 is high?
(Display_ON)
No Remove R87.
Check U13 pin AD14.
Is AD14 high?
U13 fail
No
Yes
Yes
Yes
Yes
Block 1
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Check component 1
(Pbsignal)C259
Is there sync?
No
Is picture on screen?
No Trace componect 1 from
Input To U13 circuit
Check R196,R198
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U13 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 without Pb signal)
Check component 1
(Pr signal)C264
Is there sync?
No
Is picture on screen?
No Trace componect 1 from
Input To U13 circuit
Check R204,R201
Use GProbe connect
from main to PC.Does scaler detect the signal?
Yes
No
U13 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 without Pr signal)
Check component 1
(Y signal) =>C255
Is there sync?
No
Is picture on screen?
No Trace componect 1 from
Input To U10 circuit
Check R193,R191
UseGProbe connect
Yes
No
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Y signal)
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Check component 1
(Pr signal)C255
Is there sync?
No
Is picture on screen?
No Trace componect 1 from
Input To U10 circuit
Check R205,R204
Use GProbeconnectfrom main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pr signal)
Check component 1
(Pb signal)C255Is there sync?
No
Is picture on screen?
No Trace componect 1 from
Input To U10 circuitCheck R200,R198
Use GProbeconnectfrom main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pb signal)
Check component 2
(Y signal)C258,R195
Is there sync?
No
Is picture on screen?
No
Check U23
outnputpin31Input pin 13
Input clamp voltagepin 3(+5V)Output clamp voltagepin 32(+5V)
VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)Yes
PDP DISPLAY NOTHING(Analog HD2 without Y signal)
BLOCK 1
U23 fail
No
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Check component 2(Pb signal)C260,R197
Is there sync?
No
Is no blue color on screen?
No
Check U23
outnputpin 28Input pin 15
Input clamp voltagepin 5(+5V)
Output clamp voltage
pin 29(+5V)VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)
Use GProbeconnect
from main to PC.
Does scaler detect the signal?
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD2 without Pb signal)
BLOCK 1
U23 fail
No
Check before U23s circuit1.C268,C269(AC coupled)2.R2113.R217(75ohm)
YesNo
Input source fail
Check component 2(Pr signal)C254,R192
Is there signal?
No
Is no red color on screen?
No
Check U23
outnputpin 34
Input pin 11Input clamp voltagepin 1(+5V)
Output clamp voltagepin 35(+5V)
VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD2 without Pr signal)
BLOCK 1
U23 fail
No
Check before U23s circuit1.C256,C261(AC coupled)2.R215
3.R218(75ohm)
YesNo
Input source fail
Check component 2
(Y signal)C287,R212Is there sync?
No
Is picture on screen?
No
Check U24
outnputpin 31Input pin 13
Input clamp voltagepin 3(+5V)Output clamp voltagepin 32(+5V)
VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)Yes
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Y signal)
BLOCK 1
U24 fail
No
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Check component 2
(Pb signal)C288,R213
Is there sync?
No
Is no blue color on screen?
No
Check U24
outnputpin28
Input pin 15
Input clamp voltagepin5(+5V)
Output clamp voltagepin 29(+5V)VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Pb signal)
BLOCK 1
U24 fail
No
Check before U24s circuit
1.C289,C290(AC coupled)
2.R211
3.R217(75ohm)
YesNo
Input source fail
Check component 2
(Pr signal)C284,R210
Is there signal?
No
Is no red color on screen?
No
Check U24
outnputpin 34Input pin 11
Input clamp voltagepin1(+5V)
Output clamp voltagepin 35(+5V)
VCC3pin 22,23(+5V)
Input_switch_selecthigh(+5V)
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Pr signal)
BLOCK 1
U24 fail
No
Check before U24s circuit
1.C276,C281(AC coupled)
2.R215
3.R218(75ohm)
YesNo
Input source fail
Check U45
H sync output U45 pin4,R181
V sync output U45 pin8,R184
Is there signal?
No
Is picture on screen?
No Check U45
H sync input U45 pin1,R185
V sync input U45 pin5,R187
Yes
PDP DISPLAY NOTHING(RGB)
BLOCK 1
Check U45
pin 14 +3.3V
Yes
Check input source
No U45 fail
Yes
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Check U45
H sync output U45 pin4,R181
V sync output U45 pin8,R184
Is there signal?
No
Is picture on screen?
No Check U45
H sync input U45 pin1,R185
V sync input U45 pin5,R187
Check U22s signal output
R signalC233,R180,R169,U22.34
G signalC232,R177,R171,U22.31
B signalC231,R174,R176,U22.28
Yes
No Check U22 input signal
R pin 2, C239;C241(AC coupled),R186,R172(75ohm)
G Pin 4,C234;C236(AC coupled),R166,R175(75ohm)
B Pin 6,C221;C224(AC coupled),R164,R173(75ohm)
PDP DISPLAY NOTHING(RGB on PIP mode without screen)
BLOCK 1
Check U45
pin 14 +3.3V
Yes
Check input source
No U45 fail
Yes
Check U22Input clamp voltagepin 1(+5V_V1)
Output clamp voltagepin 35(+5V)
VCC3pin 22,23(+5V)
Input_switch_selectlow(0V)
Yes
U22 fail
No
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Check C308,R273,R274Is there signal?
No
Is picture on screen?
No
PDP DISPLAY NOTHING(Composite 1 on PIP without screen)
BLOCK 1
Check Q28s emitter.Is there signal?
No Check Q28s Base.
Is there signal?
Check collectorvoltage(+5V).
No
Q28 fail
Yes
No
Check C310,R275,R274
Is there signal?
No
Is picture on screen?
No
PDP DISPLAY NOTHING(Composite 1 without screen)
BLOCK 1
Check Q28s emitter.
Is there signal?
No Check Q28s Base.Is there signal?
Check collectorvoltage(+5V).
No
Q28 fail
Check:
1.C309 (signal AC coupled)
2.R276
3.R279(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.Does scaler detect the signal?
Q13 fail
No
Check input source
No
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Check C316,R286,R285
Is there signal?
No
Is picture on screen?
No
PDP DISPLAY NOTHING(Composite 2 without screen)
BLOCK 1
Check Q29s emitter.
Is there signal?
No Check Q29s Base.
Is there signal?
Check collectorvoltage(+5V).
No
Q29 fail
Check:
1.C315 (signal AC coupled)2.R282
3.R283(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q13 fail
No
Check input sourceNo
PDP DISPLAY NOTHING(Composite 2 on PIP without screen)
Check C316,R284,R285
Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q29s emitter.
Is there signal?
No Check Q29s Base.Is there signal?
Check collectorvoltage(+5V).
No
Q29 fail
Check:
1.C315 (signal AC coupled)
2.R282
3.R283(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q10 fail
No
Check input source
No
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PDP DISPLAY NOTHING(S-VIDEO 1 without screen)
Check C320,R293,R292Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q30s emitter.Is there signal?
No Check Q30s Base.
Is there signal?Check collector
voltage(+5V).
No
Q30 fail
Check:
1.C319 (signal AC coupled)2.R297
3.R299(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q13 fail
No
Check input sourceNo
Is picture color ok?Check C328,R308,R307
Is there signal?
No NoCheck Q31s emitter.
Is there signal?
No Check Q31s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q31 fail
Check:
1.C327 (signal AC coupled)
2.R296
3.R298(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q13 fail
No
Check input source
No
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PDP DISPLAY NOTHING(S-VIDEO 1 on PIP mode without screen)
Check C318,R291,R292Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q30s emitter.Is there signal?
No Check Q30s Base.
Is there signal?Check collector
voltage(+5V).
No
Q30 fail
Check:1.C319 (signal AC coupled)
2.R297
3.R299(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.Does scaler detect the signal?
Q10 fail
No
Check input source
No
Is picture color ok?Check C326,R306,R307
Is there signal?
No NoCheck Q31s emitter.
Is there signal?
No Check Q31s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q31 fail
Check:
1.C327 (signal AC coupled)
2.R296
3.R298(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connectfrom main to PC.
Does scaler detect the signal?
Q10 fail
No
Check input source
No
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PDP DISPLAY NOTHING(S-VIDEO 2 without screen)
Check C332,R316,R320Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q33s emitter.Is there signal?
No Check Q33s Base.
Is there signal?Check collector
voltage(+5V).
No
Q33 fail
Check:
1.C335 (signal AC coupled)2.R3003.R302(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connectfrom main to PC.
Does scaler detect the signal?U13 fail
No
Check input source
No
Is picture color ok?Check C336,R319,R318
Is there signal?
No NoCheck Q32s emitter.
Is there signal?
No Check Q32s Base.Is there signal?Check collectorvoltage(+5V).
No
Q32 fail
Check:
1.C333 (signal AC coupled)2.R3013.R303(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connectfrom main to PC.
Does scaler detect the signal?
U13 fail
No
Check input source
No
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PDP DISPLAY NOTHING(S-VIDEO 2 on PIP mode without screen)
Check C331,R313,R320
Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q33s emitter.
Is there signal?
No Check Q33s Base.Is there signal?
Check collectorvoltage(+5V).
No
Q33 fail
Check:1.C335 (signal AC coupled)
2.R3003.R302(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connectfrom main to PC.
Does scaler detect the signal?U10 fail
No
Check input source
No
Is picture color ok?Check C334,R317,R318
Is there signal?
No NoCheck Q32s emitter.
Is there signal?
No Check Q32s Base.Is there signal?Check collectorvoltage(+5V).
No
Q32 fail
Check:
1.C333 (signal AC coupled)2.R3013.R303(75ohm impedance)Is there signal?
Yes
Yes
Use GProbe connectfrom main to PC.
Does scaler detect the signal?
U10 fail
No
Check input source
No
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PDP DISPLAY NOTHING(Digital 2 U35 with PORT B without screen)
Is picture on screen?
BLOCK 1
Is picture color ok?
Check U35 pin 90 highV syncR419H syncR420clockR421
No Check +3.3V_SWFB19,FB20,FB21,FB22
U41+1.8V_HDMI1
Check Q44sourcehigh(3.3V)
Check crystalY2=28.322MHz
Yes
No
Check input source?
Yes
Yes
Check U35 I2C bus
CSDApin 39CSCLpin 40
No Check Q44Gatahigh(5V)
No
Q44 fail
Yes
Check U35 all power U35 fail
Yes
I2C addr.R424
No
Check Block 2
No
No Check U35s RGB data busBRP10,RP11GRP12,RP14
RRP16,RP17
Check U37 I2C busSCLPin 6SDApin 5
Yes
NoCheck U37 power
5VPin 8
NoCheck D66 and D65
Are there 5V output?
No D66 fail
orD65 fail
Is picture on screen?No
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Block 2
HDMIs chipcommunicate with
SM5964,is ok?
No
Check U38s powerPin 44,35
Check Y311.0592MHz
Yes
NoCheck U38s UART
TxDpin13
RxDpin11
Check U20pin 16+5V
Pin 10output select=high
NoU20 fail
start
Check U2s +5V_SWpin 7,8
No
Yes
Check R143,R144
Yes
NoU13 fail
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TROUBLE OF DDCREADING
Analog DDC OK?
Start
No
Yes
No
Digital HDMI1 DDC OK?
Support DDC2B1.Analog cable ok?2.Voltage of +5V_BUF ok?3.Check U214.Is compliant protocol?
Support DDC2B1.HDMI cable ok?2.Voltage of VCC5_E2P_2ok?3.Check U44
4.Is compliant protocol?
Yes
No
Digital HDMI2 DDC OK?
Support DDC2B1.HDMI cable ok?2.Voltage of VCC5_E2P_1 ok?3.Check U374.Is compliant protocol?
End
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PDPNO SOUND
PDP NO SOUND
Start
No
Yes
Check Audio AMP U19has output?
Check U19.8 and U19.9input siganl?
No
Check C436,C430
Audio power DC power ok ?
No
Check F2 output has +24V?
No
Audio power fail
Block 3
Check audio AMP U19 has output?
No
speaker fail
Yes
U32 has output signal?
Yes
No Appstest 90 1 0x14 0x3540(Gprobe 5.0)
Is there 1KHz output?
NoU32 Fail
Check U32 input R372~R379
NoCheck U27,U28 output
R326,R328Digital HD2,AV1R332,R334Digital HD1,AV2R348,R351Analog HD1,VGAR356,R358Analog HD2
No
Check U27,U28 I2C bus
U27SDA=R344,SCL=R345U28SDA=R359,SCL=R360
Check U27,U28
+5V power
Pin 8,24,4-5V power
Pin 25
NoCheck U29s power
+5V_SWPin 8
Yes
Check U29 output-5V_Npin 5
No
Yes
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TROUBLEOFTHEDTV
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