Sony XBR-43X830C / XBR-49X830C / XBR-49X835C / XBR-49X837C / XBR-49X839C Service Manual ▷ View online
XBR-43X830C, 49X830C, 835C, 837C, 839C
105
TROUBLE SHOOTING
3-5-1. No Picture AEP Destination (BMFL/BMFW) SCART
No Picture AEP
SCART CVBS
No Picture
Check wave between
C7511 and IC1000
Detailed check all parts at
CN7501 along signal path
at Pin No:
20 : [D7505/R7518/C7510/
R7599/R7519]
Check SCART_FB
IC1000 L37
[SOY0] at R7514
*
Check CN7501
Connection
Muffin [IC1000]
Problem
SCART RGB
No Picture
OK (Vpp: 1 V)
Check wave between
C7502/C7505/C7507
and IC1000
**
Detailed check all parts at
CN7501 along signal path
at Pin No:
7 : [VD7503/R7503/C7501/
R7504]
11 : [VD7502/R7506/C7503/
R7507]
15 : [VD7501/R7510/C7506/
R7511]
NG (Vpp: 0 V)
Check SCART_FB
IC1000 L37
[SOY0] at R7514
*
Check CN7501
Connection
NG
[LOW: 0V]
OK [HIGH: 0.4V Composite]
OK [HIGH: 3V RGB]
Muffin [IC1000]
Problem
**
Detailed check all parts
at SCART_FB signal
Path [VD7504/R7513]
CN7501 Connectivity
Problem
Parts Broken
CN7501 Connector
Problem
OK
NG
CN7501 Connectivity
Problem
NG
OK
NG
NG
**
Detailed check all parts
at SCART_FB signal
Path [VD7504/R7513]
Parts Broken
CN7501 Connector
Problem
OK
OK
OK
NG
NG
OK
**
OK Condition : No part short-circuited
NG Condition : Part short-circuited
NG (Vpp: 0 V)
OK (Vpp: 1 V)
*
OK Condition : No solder splash can be seen
NG Condition : Solder splash can be seen
[All voltage measurement using Oscilloscope]
NG
[LOW: 0V]
OK [HIGH: 0.4V Composite]
OK [HIGH: 3V RGB]
XBR-43X830C, 49X830C, 835C, 837C, 839C
106
TROUBLE SHOOTING
3-5-2. No Picture AEP Destination (BMFL/BMFW) VIDEO
Video 2
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
Component
No Picture
NG
*
Check J7504 Con
VIDEO_DET at
R7539,
CR_DET at R7538
Check wave between
C7512 and IC1000
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
Check if input OSD
is GREY OUT
OK if it is highlighted
*
Check J7504
Connection,
VIDEO_DET
At R7539
Muffin [IC1000]
Problem
OK
NG
Muffin [IC1000]
Problem
No Picture AEP
J7504 Connectivity
Problem
**
Detailed check all
parts at VIDEO_DET
signal Path [R7535]
Parts Broken
J7504 Connector
Problem
OK
NG
**
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: 1 V)
NG (Vpp: 0 V)
[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
107
TROUBLE SHOOTING
3-5-3. No Picture CH/MX/PA/COL/LA (BMFL/BMFW)
Video 1
No Picture
Video 2
No Picture
Check wave between
C7512 and IC1000
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
No Picture Video
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
[D7514/R721/C7521/
R7519/C7534]
*
Check J7505
Connection,
VIDEO2_DET
At R7562
J7505 Connectivity
Problem
**
Detailed check all
parts at VIDEO2_DET
Signal Path [R7561]
Parts Broken
J7505 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
108
TROUBLE SHOOTING
3-5-4. No Picture CH/MX/PA2/NZ/AUS/BR/COL/BR/UC/HK/TW (BMX)
No Picture Video
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)
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