Page 1
Service Manual
Model #: VIZIO P50HDM
V, Inc
320A Kalmus Drive Costa Mesa, CA 92626
TEL : +714-668-0588 FAX :+714-668-9099
-TOP Confidential -
Page 2
Table of Contents
CONTENTS PAGE
Sections
1. Features 1-1
2. Specifications 2-1
3. On Screen Display 3-1
4. Factory Preset Timings
5. Pin Assignment
4-1
5-1
6. BLOCK DIAGRAM 6-1
7. Main Board I/O Connections 7-1
8. Theory of Circuit Operation 8-1
9. Waveforms 9-1
10. Trouble Shooting 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
VIZIO P50HDM Service Manual
Page 3
VINC Service Manual
VIZIO P50HDM
COPYRIGHT © 2000 V, INC. ALL RIGHTS RESERVED.
IBM and IBM products are registered trademarks of International Business Machines
Corporation.
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 Standards
Association (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 any
purpose 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 reasonable
protection 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 with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that the interference will not occur in a particular installation. If this equipment
does cause unacceptable interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures -- reorient or relocate the receiving
antenna; increase the separation between equipment and receiver; or connect the into an
outlet on a circuit different from that to which the receiver is connected.
FCC WARNING
To assure continued FCC compliance, the user must use a grounded power supply cord and
the provided shielded video interface cable with bonded ferrite cores. Also, any unauthorized
changes or modifications to Amtrak products will void the user’s authority to operate this
device. Thus VINC Will not be held responsible for the product and its safety.
CE CERTIFICATION
This device complies with the requirements of the EEC directive 89/336/EEC with regard to
“Electromagnetic compatibility.”
SAFETY CAUTION
Use 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
Appliance Control Act); or an AC cord that meets the local safety standards.
VIZIO P50HDM Service Manual
Page 4
Chapter 1 Features
Wall-mountable
New WIDE HD Plasma Panel:1366 x 768 (H x V)
TruSurround XT sound system and DCDi by Faroujia video image
High definition digital interface – HDMI
HDCP supportive
Multiple-screen display (picture-on-picture/picture-in-picture)
Selectable picture mode
4-language On Screen Display
2 S-video and Composite video inputs
2 Component video inputs
2 HDMI inputs
6 audio stereos, 1 PC Mini-Jack
Supporting DVI converted to HDMI
Closed caption
Gloss front bezel
The thinnest model of this size: 99 mm
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Chapter 2 Specification
1. OPTICAL CHARACTERISTICS
Item Specification
Display Pixels 1366 (H) x 768 (V) pixels
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.300 cd/m
Contrast ratio (panel spec) 8000:1 (Typical, dark room)
Color Coordinates (typical)
White (Panel spec) x=0.300±0.02, y=0.300±0.02
White (w/glass filter) Warm (5400K)
Standard (6500K)
Cool (9300K):
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)
H: 45KHz V: 60Hz (720p)
H: 33KHz V: 60Hz (1080i)
S-Video： Video (Y): Analog 0.1Vp-p/75Ω
Video (C): Analog 0.286p-p/75Ω
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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)
3. INPUT CONNECTORS
Input Label Connector Type Input Label Connector Type
SERVICE RJ-11 x 1 ANALOG HD1 YPb/Cb Pr/Cr RCA Jack x 3
Audio RCA Jack x 2
DIGITAL HD1 19 pin HDMI x 1
Audio RCA Jack x 2
DIGITAL HD2 19 pin HDMI x 1
Audio RCA Jack x 2
RGB D-sub 15 pin x 1
Mini Jack x 1 (Audio
input)
ANALOG HD2 YPb/Cb Pr/Cr RCA Jackx 3
AV1 RCA Jack (CVBS) x 3
AV2 RCA Jack (CVBS) x 3
4. OUTPUT CONNECTORS
a. Audio RCA Jack x 2
b. 3.5mm Mini-jack earphone x 1
5. POWER SUPPLY
Consumption: 550W MAXPower OFF: less than 3W
6. SPEAKER
Output 8Ω/10W (max) X2
Audio RCA Jack x 2
S-video 4 pin mini DIN x 1
S-video 4 pin mini DIN x 1
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Page 7
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: 55.2 +/- 0.5 kgs
b. Gross: 65.2 +/- 0.5 kgs
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Page 8
Chapter 3 On Screen Display
Main unit button
POWER
MENU
▲
▼
VOL-/W
VOL+/X
INPUT
OSD Adjustment
Mode
Image Settings
VIDEO
VIDEO Saturation(0~100)
VIDEO Hue(-50~50)
VIDEO Sharpness(0~24)
VIDEO Noise Reduction
VIDEO Motion(0~16)
VIDEO Digital(0~64)
VIDEO Fleshtone Off, High, Moderate, Low
VIDEO
Picture Mode(User, Vivid,
Movie, Game, Sport)
Brightness(0~100)
Contrast(0~100)
Advanced
Dynamic Contrast
(0, 1, 2, 3)
PC Auto Adjustment
PC Image Position
PC Phase
PC Clocks / Line
PC Color Temp
PC Warm(5400K)
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Page 9
PC Standard(6500K)
PC Cool(9300K)
PC User
PC Red(0~100)
PC Green(0~100)
PC Blue(0~100)
Display Settings
VIDEO Aspect Ratio
Zoom, Panoramic*
PC Aspect Ratio Wide, Normal
PIP
Off, Large PIP, Small PIP,
PIP Mode
POP
Top-Left, Top-Right,
Wide, Normal,
PIP Position
Bottom-Left,
Bottom-Right
PIP Input**
Audio Settings
Bass(0~20)
Treble(0~20)
Balance(-10~10)
SRS TS XT(Off, On)
Auto Volume(On, Off)
Speakers(On, Off)
Audio Out***
Fixed Volume,
Variable Volume
Parental Controls
VIDEO Password
VIDEO
Settings
VIDEO TV Rating
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File No. SG-0173
Page 10
VIDEO TV Youth
(Unblocked,
Blocked)
VIDEO TV Youth 7
(Unblocked,
Blocked)
VIDEO TV G (Unblocked,
Blocked)
VIDEO TV PG (Unblocked,
Blocked)
VIDEO TV 14 (Unblocked,
Blocked)
VIDEO TV MA (Unblocked,
Blocked)
VIDEO Unblocked
VIDEO Movie Rating
VIDEO Movie G
(Unblocked,
Blocked)
VIDEO Movie PG
(Unblocked,
Blocked)
VIDEO Movie PG-13
(Unblocked,
Blocked)
VIDEO Movie R
(Unblocked,
Blocked)
VIDEO Movie NC-17
(Unblocked,
Blocked)
VIDEO Movie X
(Unblocked,
Blocked)
VIDEO
Unblocked
Block Unrated (No, Yes)
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Page 11
VIDEO
Change Password
VIDEO
VIDEO
VIDEO
Setup
Closed Caption
Captions on mute
Language English, Français,
Factory Reset (Yes, No)
Clear All (No, Yes)
Display
(On, Off)
Español, Italiano
Please enter new
password
Please re-enter new
password
Off, CC1, CC2, CC3,
CC4, TEXT1, TEXT2,
TEXT3, TEXT4
Image Cleaner
Firmware Version
* HDMI and Component 720P/1080i inputs do not support Panoramic.
** See below for detailed information regarding the PiP sources.
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File No. SG-0173
Page 12
Main \ Sub
AV1
(S-VIDEO)
AV2
(S-VIDEO)
AV1
(VIDEO)
AV2
(VIDEO)
Analog
HD1
Analog
HD2
Digital
HD1
AV1
(S-VIDEO)
AV2
(S-VIDEO)
AV1
(VIDEO)
AV2
(VIDEO)
Analog
HD1
Analog
HD2
Digital
HD1
Digital
RGB
HD2
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x
x x x x x x
x x x x x x
Digital
HD2
RGB
x x x x x x
x x x x x x
Remark：
(1)：“x” – 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
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Chapter 10 PDP Trouble Shooting
d
A. SYSTEM OVERVIEW
Y driver board
Display board
Main board
X driver board
Power supply board
Audio Voltage
selectior
EMI filter
Audio power
IR boar
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B. PCB PARTS NAME/NUMBER AND FUNCTION DESCRIPTION
PAR T NA M E 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
C. BOARD PICTURE
MAIN BOARD
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DISPLAY BOARD
IR BOARD
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PDP DISPLAY NOTHING
1. Main board block diagram
U26 MAX232A
UC_SCL/UC_SDA
ATXD_HUD
ARXD_HUD
U40 24LC128
EEPROM(8051)
U38
SM5964-C40J
J9
2
1
3 ATXD_HUD
J10
2
1
3
U20 4052
4/1 x2 I/O
ARXD
ATXD
ARXD_HUD
HY5DU56822CT-D4
U17 DDR RAM CTZ
HY5DU56822CT-D4
U16 DDR RAM HUD
W7
W14
W8
CN17
W13
CN16
W6
Component 1
Component 2
W11
W10
W5
W13
U37 24LC02
EEPROM HDMI1
U40 24LC02
EEPROM HDMI2
AudioAV1_R/L
CVBS1
CVBS2
AudioAV2_R/L
Y1/C1
Y2/C2
Y Pr Pb
Y Pr Pb
ANLOG DDC
VGA_SCL / VGA_SDA
VS / HS
R G B
ATSC Y
Pr Pb
U42 Sil 9011
HDMI RS
U35 Sil 9011
HDMI RS
U21 24LC02
EEPROM VGA
U45 74HCT14
Inverting Schmitt Trgg er
U22 M61323FP
VEDIO SW
U23 M61323FP
VEDIO SW
U24 M61323FP
VEDIO SW
ADATA[0:23]
BDATA[0:23]
U37 CS3443
HDMI2 LR ADC
U36 CS3443
HDMI1 LR ADC
U46 IDTQS3253
HDMI1 AUDIO SW
U42 IDTQS3253
HDMI1 AUDIO SW
HDMI1_AUDIO_L/R
HDMI2_AUDIO_L/R
AudioAV1_R/L
AudioAV1_R/L
COMP1_Audio_R/L
COMP2_Audio_R/L
VGA_AUDIO_L/R
U28 MAX4550
AUDIO SW
4/2 I/O
U27 MAX4550
AUDIO SW
4/2 I/O
51_RXD/51_TXD
VGA_SCL / VGA_SDA
CH4_R/L
CH3_R/L
CH2_R/L
CH1_R/L
SV4_CTZ
SV2_CTZ
SV3_CTZ
A1_CTZ
B1_CTZ
C1_CTZ
ATXD_HUD
ARXD_HUD
SV4_HUD
SV2_HUD
SV3_HUD
A1_HUD
B1_HUD
C1_HUD
ARXD
ATXD
U32 P4450G
AUDIO
PROCESS
FL8532_CTZ
FL8125_HUD
Lineout_R/L
HLIN/HRIN
SCL-33V / SDA-33V
W1
NC7SB3157
U18 BUS SW
XU1 A29LV320D
MEMERY_CTZVGA input
U11 24LC32
EEPROM HUD
U11 SST25VF040
FLASH 512K HUD
U33 PT2308
AUDIO DRIVER
U34 PT2308
AUDIO DRIVER
KEY PAD
CN5
F75373S
U25
風扇控制
TDA8946AJ
AUDIO_AMP
Display
W12
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PDP DISPLAY NOTHING(Analog HD1/AC on/off default)
Start
Powe r LED is ligh ting?
Yes
Powe r LED is ligh ting?
Yes
Powe r LED is ligh ting?
Yes
PDP DISPLAY NOTHING(Analog HD1 without Y signal)
No
Check AC pow er cord
No
Press Meun or Info.
Is there any OSD’s logo
Check internal cable?
1.LVDS cable.
No
Check internal cable?
1.CN1’s cabl e
2.CN3’s cabl e
D10,D11 LED is lighting?
Yes
Check input source
No
No
Check W1 pin 27 is high?
(Display_ON)
No
Check main board CN3 pin 4Î studyby +5V
Check CN3 pin 3Î RLY_ON(high)
Check CN3 pin 2Î VS_ON(high)
No
No
U13 fail
No
No
Check Fuse open?
(F2,F3,F4)
Yes
Yes
Yes
Yes
Remove R87.
Check U13 pin AD14.
Is AD14 high?
Yse
Check U3.4Î3.3V
Check U8Î1.8V
Check U9Î2.5V
If power_off Îhigh
U2,U5Î ON
Check +3.3V_SW
,+5V_SW,+12V_SW
(pin 5,6 and pin 7,8)
No
U13 fail
Check CN1Îpin 1,2,3 = +5V
pin 7,8 = +12V
No
Yes
Panel power
fail
Fuse fail
No
U3 fail
No
U8 fail
No
U9 fail
No
U2,U5 fail
Block 1
No
Is picture on screen?
Check component 1
(Y signal) ÎC252
Is there sync?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Yes
No
Trace componect 1 from
No
Input To U13 circuit
Check R190,R191
U13 fail
1
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File No. SG-0174
Page 18
PDP DISPLAY NOTHING(Analog HD1 without Pb signal)
BLOCK 1
Is picture on screen?
No
Check component 1
(Pb signal) ÎC259
Is there sync?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
Trace componect 1 from
Input To U13 circuit
Check R196,R198
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD1 without Pr signal)
BLOCK 1
Is picture on screen?
No
Check component 1
(Pr signal) ÎC264
Is there sync?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
Trace componect 1 from
Input To U13 circuit
Check R204,R201
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Y signal)
BLOCK 1
No
Is picture on screen?
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Check component 1
(Y signal) =>C255
Is there sync?
Yes
Use GProbe connect
from main to PC.
No
Trace componect 1 from
Input To U10 circuit
Check R193,R191
No
U10 fail
2
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File No. SG-0174
Page 19
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pb signal)
BLOCK 1
Is picture on screen?
No
Check component 1
(Pb signal) ÎC255
Is there sync?
Use GProbe connect
from main to PC.
Does scaler de tect the signal?
No
Trace componect 1 from
Input To U10 circuit
Check R200,R198
Yes
No
U10 fail
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pr signal)
BLOCK 1
Is picture on screen?
No
Check component 1
(Pr signal) ÎC255
Is there sync?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
Trace componect 1 from
Input To U10 circuit
Check R205,R204
Yes
No
U10 fail
PDP DISPLAY NOTHING(Analog HD2 without Y signal)
BLOCK 1
No
Check component 2
Is picture on screen?
(Y signal) ÎC258,R195
Is there sync?
Use GProbe connect
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Yes
from main to PC.
Check U23
No
No
U13 fail
outnputÎpin 31
InputÎ pin 13
Input clamp voltageÎpin 3(+5V)
Output clamp voltageÎpin 32(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
Yes
No
U23 fail
Check before U23’s circuit
1.C263,C265(AC coupled)
2.R209
3.R216(75ohm)
No
Input source fail
3
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File No. SG-0174
Page 20
PDP DISPLAY NOTHING(Analog HD2 without Pb signal)
BLOCK 1
Check U23
Is no blue color on screen?
No
Check component 2
(Pb signal) ÎC260,R197
Is there sync?
No
Yes
outnputÎpin 28
Inpu tÎ pin 15
Input clamp voltageÎpin 5(+5V)
Output clamp voltageÎpin 29(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
No
U23 fail
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
U13 fail
Yes
Check before U23’s circuit
1.C268,C269(AC coupled)
2.R211
3.R217(75ohm)
No
PDP DISPLAY NOTHING(Analog HD2 without Pr signal)
BLOCK 1
Check U23
outnputÎpin 34
Inpu tÎ pin 11
Input clamp voltageÎpin 1(+5V)
Output clamp voltageÎpin 35(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
Yes
Check before U23’s circuit
1.C256,C261(AC coupled)
2.R215
3.R218(75ohm)
No
U23 fail
No
Is no red color on screen ?
No
Check component 2
(Pr sign al) ÎC254,R192
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Y signal)
BLOCK 1
Input source fail
Input source fail
No
Check component 2
Is picture on screen?
(Y signa l) ÎC287,R212
Is there sync?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Check U24
No
Yes
No
U10 fail
outnputÎpin 31
Inpu tÎ pin 13
Input clamp voltageÎpin 3(+5V)
Output clamp voltageÎpin 3 2(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
Yes
No
U24 fail
Check before U24’s circuit
1.C282,C285(AC couple d)
2.R209
3.R216(75ohm)
No
Input source fail
4
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File No. SG-0174
Page 21
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Pb signal)
BLOCK 1
Check U24
Is no blue color on screen?
No
Check component 2
(Pb signal) ÎC288,R213
Is there sync?
No
Yes
outnputÎpin 28
InputÎ pin 15
Input clamp voltageÎpin 5(+5 V)
Output clamp voltageÎpin 29(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
No
U24 fail
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
U10 fail
Yes
Check before U24’s circuit
1.C289,C290(AC coupled)
2.R211
3.R217(75ohm)
No
PDP DISPLAY NOTHING(Analog HD2 on PIP mode without Pr signal)
BLOCK 1
Check U24
Is no red color on screen?
No
Check component 2
(Pr signal) ÎC284,R210
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No
Yes
No
U10 fail
outnputÎpin 34
InputÎ pin 11
Input clamp voltageÎpin 1(+5 V)
Output clamp voltageÎpin 35(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎhigh(+5V)
Yes
No
U24 fail
Check before U24’s circuit
1.C276,C281(AC coupled)
2.R215
3.R218(75ohm)
No
PDP DISPLAY NOTHING(RGB)
BLOCK 1
Yes
Check input source
Check U45
pin 14Î +3.3V
Yes
Is picture on screen?
H sync output Î U45 pin4,R181
No
V sync output Î U45 pin8,R184
Yes
Check U45
Is there signal?
No
Check U45
H sync input Î U45 pin1,R185
V sync input Î U45 pin5,R187
No
Input source fail
Input source fail
U45 fail
Check U22’s signal output
R signal ÎC238,R180,R169,U22.34
G signal ÎC237,R177,R171,U22.31
B signal ÎC235,R174,R176,U22.28
CONFIDENTIAL – DO NOT COPY
No
R Î pin 2, C239;C241(AC coupled),R186,R172(75ohm)
G Î Pin 4,C234;C236(AC coupled),R166,R175(75ohm)
B Î Pin 6, C221;C224(AC coupled),R164,R173 (75ohm)
Check U22 input signal
Yes
Input clamp voltageÎpin 1(+5V_V1)
Output clamp voltageÎpin 35(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎlow (0V)
Check U22
No
U22 fail
5
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File No. SG-0174
Page 22
PDP DISPLAY NOTHING(RGB on PIP mode without screen)
BLOCK 1
Is picture on screen?
Check U22’s signal output
R signal ÎC233,R180,R169,U22.34
G signal ÎC232,R177,R171,U22.31
B signal ÎC231,R174,R176,U22.28
H sync output Î U45 pin4,R181
No
V sync output Î U45 pin8,R184
Yes
Check U45
Is there signal?
No
No
R Î pin 2, C239;C241(AC coupled),R186,R172(75ohm)
G Î Pin 4,C234;C236(AC coupled),R166,R175(75ohm)
B Î Pin 6,C221;C224(AC coupled),R164,R173(75ohm)
Check U22 input signal
Check U45
H sync input Î U45 pin1,R185
V sync input Î U45 pin5 ,R187
No
Yes
Input clamp voltageÎpin 1(+5V_V1)
Output clamp voltageÎpin 35(+5V)
VCC3Îpin 22,23(+5V)
Input_switch_selectÎlow (0V)
Check input source
Check U22
Yes
Check U45
pin 14Î +3.3V
Yes
U45 fail
No
U22 fail
CONFIDENTIAL – DO NOT COPY
6
Page10-10
File No. SG-0174
Page 23
PDP DISPLAY NOTHING(Composite 1 without screen)
BLOCK 1
Is picture on screen?
No
Check C310,R275,R274
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C309 (signal AC coupled)
2.R276
3.R279(75ohm impedance)
Is there signal?
No
Check Q28’s emitter.
Is there signal?
Yes
No
Q13 fail
Yes
No
Check input source
No
Check Q28’s Base.
Is there signal?
Check collector
voltage(+5V).
PDP DISPLAY NOTHING(Composite 1 on PIP without screen)
BLOCK 1
No
Q28 fail
No
Is picture on screen?
Check C308,R273,R274
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Is there signal?
Yes
Use GProbe connect
from main to PC.
Check:
1.C309 (signal AC coupled)
2.R276
3.R279(75ohm impedance)
Is there signal?
No
Yes
Check Q28’s emitter.
Is there signal?
No
Q10 fail
No
No
Check input source
Check Q28’s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q28 fail
7
Page10-11
File No. SG-0174
Page 24
PDP DISPLAY NOTHING(Composite 2 without screen)
BLOCK 1
Is picture on screen?
No
Check C316,R286,R285
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C315 (signal AC coupled)
2.R282
3.R283(75ohm impedance)
Is there signal?
No
Check Q29’s emitter.
Is there signal?
Yes
No
Q13 fail
Yes
No
Check input source
No
Check Q29’s Base.
Is there signal?
Check collector
voltage (+5V).
PDP DISPLAY NOTHING(Composite 2 on PIP without screen)
BLOCK 1
Is picture on screen?
No
Check C316,R284,R285
Is there signal?
Yes
No
Check Q29’s emitter.
Is there signal?
No
Check Q29’s Base.
Is there signal?
Check collector
voltage (+5V).
No
Q29 fail
No
Q29 fail
Does scaler detect the signal?
CONFIDENTIAL – DO NOT COPY
Use GProbe connect
from main to PC.
Check:
1.C315 (signal AC coupled)
2.R282
3.R283(75ohm impedance)
Is there signal?
No
Q10 fail
Yes
No
Check input source
8
Page10-12
File No. SG-0174
Page 25
PDP DISPLAY NOTHING(S-VIDEO 1 without screen)
BLOCK 1
Is picture on screen?
Is picture color ok?
No
Check C320,R293,R292
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C319 (signal AC coupled)
2.R297
3.R299(75ohm impedance)
Is there signal?
No
Check C328,R308,R307
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C327 (signal AC coupled)
2.R296
3.R298(75ohm impedance)
Is there signal?
Check Q30’s Base.
No
Check Q30’s emitter.
Is there signal?
Yes
No
Q13 fail
Yes
No
No
Check Q31’s emitter.
Is there signal?
Yes
No
Q13 fail
Yes
No
No
Check input source
No
Check input source
Is there signal?
Check col lector
voltage(+5V).
Check Q31’s Base.
Is there signal?
Check col lector
voltage(+5V).
No
Q30 fail
No
Q31 fail
CONFIDENTIAL – DO NOT COPY
9
Page10-13
File No. SG-0174
Page 26
PDP DISPLAY NOTHING(S-VIDEO 1 on PIP mode without screen)
BLOCK 1
Is picture on screen?
Is picture color ok?
No
Check C318,R291,R292
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C319 (signal AC coupled)
2.R297
3.R299(75ohm impedance)
Is there signal?
No
Check C326,R306,R307
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C327 (signal AC coupled)
2.R296
3.R298(75ohm impedance)
Is there signal?
No
Check Q30’s emitter.
Is there signal?
Yes
No
Q10 fail
Yes
No
Check input source
No
Check Q31’s emitter.
Is there signal?
Yes
No
Q10 fail
Yes
No
Check input source
No
No
Check Q30’s Base.
Is there signal?
Check col lector
voltage(+5V).
Check Q31’s Base.
Is there signal?
Check col lector
voltage(+5V).
No
Q30 fail
No
Q31 fail
CONFIDENTIAL – DO NOT COPY
10
Page10-14
File No. SG-0174
Page 27
PDP DISPLAY NOTHING(S-VIDEO 2 without screen)
BLOCK 1
Is picture on screen?
Is picture color ok?
No
Check C332,R316,R320
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C335 (signal AC coupled)
2.R300
3.R302(75ohm impedance)
Is there signal?
No
Check C336,R319,R318
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C333 (signal AC coupled)
2.R301
3.R303(75ohm impedance)
Is there signal?
No
Check Q33’s emitter.
Is there signal?
Yes
No
U13 fail
Yes
No
Check input source
No
Check Q32’s emitter.
Is there signal?
Yes
No
U13 fail
Yes
No
Check input source
No
No
Check Q33’s Base.
Is there signal?
Check col lector
voltage(+5V).
Check Q32’s Base.
Is there signal?
Check col lector
voltage(+5V).
No
Q33 fail
No
Q32 fail
CONFIDENTIAL – DO NOT COPY
11
Page10-15
File No. SG-0174
Page 28
PDP DISPLAY NOTHING(S-VIDEO 2 on PIP mode without screen)
BLOCK 1
Is picture on screen?
Is picture color ok?
No
Check C331,R313,R320
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C335 (signal AC coupled)
2.R300
3.R302(75ohm impedance)
Is there signal?
No
Check C334,R317,R318
Is there signal?
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Check:
1.C333 (signal AC coupled)
2.R301
3.R303(75ohm impedance)
Is there signal?
Check Q33’s Base.
No
Check Q33’s emitter.
Is there signal?
Yes
No
U10 fail
Yes
No
No
Check Q32’s emitter.
Is there signal?
Yes
No
U10 fail
Yes
No
No
Check input source
No
Check input source
Is there signal?
Check coll ector
voltage(+5V).
Check Q32’s Base.
Is there signal?
Check coll ector
voltage(+5V).
No
Q33 fail
No
Q32 fail
CONFIDENTIAL – DO NOT COPY
12
Page10-16
File No. SG-0174
Page 29
PDP DISPLAY NOTHING(Digital 2 U35 with PORT B without screen)
BLOCK 1
No
Is picture on screen?
Check input source?
Yes
Is picture on screen?
Is picture color ok?
No
No
Check U37 I2C bus
SCLÎPin 6
SDAÎpin 5
Check U35 pin 90 Î high
V syncÎR419
H syncÎR420
clockÎR421
Check Q44
sourceÎhigh(3.3V)
Check U35 I2C busÎ
CSDAÎpin 39
CSCLÎpin 40
Check U35 all power U35 fail
Check U35’s RGB data bus
BÎRP10,RP11
GÎRP12,RP14
RÎRP16,RP17
No
No
No
Yes
No
Yes
Yes
Check U37 power
5VÎPin 8
Check +3.3V_SWÎ
FB19,FB20,FB21,FB22
U41Î+1.8V_HDMI1
Yes
Check Q44
GataÎhigh(5V)
I2C addr.ÎR424
No
No
No
Yes
Q44 fail
Check Block 2
Check D66 and D65
Are there 5V output?
Check crystalÎ
Y2=28.322MHz
No
D66 fail
or
D65 fail
CONFIDENTIAL – DO NOT COPY
14
Page10-17
File No. SG-0174
Page 30
Block 2
start
HDMI’s chip
communicate with
SM5964,is ok?
No
Check U38’s powerÎ
Pin 44,35
Yes
Check Y3Î
11.0592MHz
Yes
Check U38’s UART
TxDÎpin 13
RxDÎpin 11
No
No
Check U2’s +5V_SW
Îpin 7,8
Check U20Î
pin 16Î+5V
Pin 10Îoutput select=high
Check R143,R144
Yes
No
U20 fail
No
U13 fail
CONFIDENTIAL – DO NOT COPY
15
Page10-18
File No. SG-0174
Page 31
TROUBLE OF DDC READING
Start
Analog DDC OK?
Yes
Digital HDMI1 DDC OK?
Yes
Digital HDMI2 DDC OK?
Support DDC2B
No
1.Analog cable ok?
2.Voltage of +5V_BUF ok?
3.Check U21
4.Is compliant protocol?
Support DDC2B
No
1.HDMI cable ok?
2.Voltage of VCC5_E2P_2ok?
3.Check U44
4.Is compliant protocol?
Support DDC2B
No
1.HDMI cable ok?
2.Voltage of VCC5_E2P_1 ok?
3.Check U37
4.Is compliant protocol?
End
CONFIDENTIAL – DO NOT COPY
Page10-19
File No. SG-0174
Page 32
Page 33
Page 34
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