Sony XBR-43X830C / XBR-49X830C / XBR-49X835C / XBR-49X837C / XBR-49X839C Service Manual ▷ View online
XBR-43X830C, 49X830C, 835C, 837C, 839C
109
TROUBLE SHOOTING
3-5-5. No Picture J/UC/HK/TW Destination (BMFL/BMFW)
No Picture
Video1
No Picture
Video2
No Picture
Check wave between
C7512 and IC1000
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
Check wave between
C7511 and IC1000
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
Muffin [IC1000]
Problem
Muffin [IC1000]
Problem
**
Detailed check all parts
at CVBS2P signal path
[D7505/R7559/
C7511etc]
*
Check J7501
Connection,
VIDEO2_DET
At R7537
J7501 Connectivity
Problem
**
Detailed check all
parts at VIDEO2_DET
Signal Path [R7556]
Parts Broken
J7501 Connector
Problem
OK
NG
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
*
Check J7504
Connection,
VIDEO_DET
At R7539
J7504 Connectivity
Problem
**
Detailed check all
parts at VIDEO_DET
Signal Path [R7535]
Parts Broken
J7504 Connector
Problem
OK
NG
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 1 V)
NG (Vpp: 0 V)
**
OK Condition : No part short-circuited
NG Condition : Part short-circuited
*
OK Condition : No solder splash can be seen
NG Condition : Solder splash can be seen
[All voltage measurement using Oscilloscope]
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
XBR-43X830C, 49X830C, 835C, 837C, 839C
110
TROUBLE SHOOTING
3-5-6. No Picture J/UC/HK/TW Destination (BMFL/BMFW)
No Picture
Component
No Picture
Check wave
Between
C7515/C7518/C7520
and IC1000
**
Detailed check all parts
at signal path of:
Y1P : [D7530/R7524/C7514/
R7527]
PB1P : [VD7508/R7529/C7517/
R7530]
PR1P : [VD7509/R7532/C7519/
R7553]
OK
Check if input OSD
is GREY OUT
OK if it is highlighted
NG
*
Check J7504 Con
VIDEO_DET at R7539,
CR_DET at R7538
Muffin [IC1000]
Problem
**
Detailed check all parts
at VIDEO_DET signal
Path [R7535] and CR_DET
signal path [R7534]
Parts Broken
J7504 Connector
Problem
OK
NG
J7504 Connectivity
Problem
**
OK Condition : No part short-circuited
NG Condition : Part short-circuited
*
OK Condition : No solder splash can be seen
NG Condition : Solder splash can be seen
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
XBR-43X830C, 49X830C, 835C, 837C, 839C
111
TROUBLE SHOOTING
3-5-7. No Picture : @ Tuner
Notes:
I2C line for all tuners except Japan_SKP
- Parts for I2C_A_SDA line: R6001, C6004.
- Parts for I2C_A_SCL line: R6002, C6005.
I2C line for Japan_SKP
- Parts for I2C_D_SDA line: R6003,C6006
- Parts for I2C_D_SCL line: R6004,C6007
TU_1.1V line only in Japan_SKP Tuner
- Parts for TU_1.1V: FB6800
RF input no picture / noisy picture
Change RF cable and antenna
OK
OK
NG
NG
Check RF source cable
and antenna, OK?
Check Tuner power line:
3.3V at JL6005 = 3.3V?
1.8V at JL6006 = 1.8V?
DEM_3.3V at JL6019 = 3.3V?
A_RESET value at JL6012 = 3.3V?
For JP_SK only – TU1.1 V (Refer notes)
All broadcasting channel
cannot be received?
NO
YES
Check part mounting condition
for “I2C_A_SDA, I2C_A_SCL
or
I2C_D_SDA, I2C_D_SCL”
Refer Note I2C
Change NG parts
connected to I2C bus
NG
OK
Analog
Refer Analog Tuning
Refer Digital Tuning 1
Digital
Check Tuner power line
12V at JL6027 = 12V?
Satellite
Refer Digital Tuning 2
NG
OK
12V LNB Voltage
Checking
For TW & NA-ATSC
(MX/UC) only
All tuners except
TW & NA-ATSC(MX/UC)
Terrestrial/Cable
Please refer DDCON
troubleshooting
XBR-43X830C, 49X830C, 835C, 837C, 839C
112
TROUBLE SHOOTING
3-5-8. FOR 12V LNB Voltage Checking: @ AEP_W and JP_SKP
12V LNB Voltage Checking
NG
OK
OK
NG
Change the fuse
Check fuse F6000
Check Tuner power line
12V at JL9012 = 12V?
Check P_ON_LNB signal line
at R9167 = 3.3V?
MOSFET Q9019
broken
OK
NG
Check harness between
B-Board and G-board
OK
NG
Harness broken
Please refer G-board
troubleshooting
Please refer DDCON
troubleshooting
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