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Model
KDL-46W950A KDL-46W954A KDL-46W955A KDL-46W957A KDL-55W950A KDL-55W954A KDL-55W955A KDL-55W957A
Pages
127
Size
54.97 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / COMMON
File
kdl-46w950a-kdl-46w954a-kdl-46w955a-kdl-46w957a-kd.pdf
Date
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Sony KDL-46W950A / KDL-46W954A / KDL-46W955A / KDL-46W957A / KDL-55W950A / KDL-55W954A / KDL-55W955A / KDL-55W957A Service Manual ▷ View online

RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
3 1 2 No POWER: Ayu2 Control
3-1-2.  No POWER:  Ayu2 Control
No Power
Note: 
G BOARD : ( N/A FOR THIS MODEL)
Check STBY_+3.3V
at AYU2
(F11, G11, K13 pin
 C7348)
Look for AC_MON line 
at CN9101 pin2 (except BK*) or 
G-board  / Adapter failure (LW) 
NG
NG
Check AC_MON
at AYU2
(C6 pin 
 R7352)
look for where 
STBY_+3.3V is NG.
 C7348)
Look for MAIN_POWER line 
NG
Check MAIN_PWR
OK
Check STBY_+1.8V
at AYU2
look for where 
OK
NG
_
at CN9101 pin1 (except BK*) 
or replace AYU2
at AYU2
(A9 pin 
 R7344)
OK
(K5, L5, L10, J7 pin 
 C7349)
STBY_+1.8V is NG.
OK
Check STBY_+1.0V
at AYU2
(N13, P13 pin 
 C7350)
look for where
STBY_+1.0V is NG.
G-board  /
Adapter  (LW)
NG
Check REG+12V
at CN9101 pin7
Check REG+19V
9301(
*
)
NG
Check Xtal oscillation
OK
NG
It might be power supply problem
at F9301(BK* only)
OK
N t
X7302, 32.768KHz
(A7, B7 pin 
 R7386)
Replace X7302 or Ayu2
OK
Please refer "DC/DC converter check" sheet
Or
Check "STBY LED BLINKING"
Size
B*
Board 
Type
G*
Board 
Type
46”
BM
G3A
25
Note: 
(AYU2) – IC9000
(Brownie)- IC9001
46”
BM
G3A
55”
BM
G3B
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Troubleshooting Reference 
Board Name
Board PWB
Detail
BA2-S
(C7348)
(C7349)
(C7350)
(B side)
C7349
(C7350)
C7348
C7350
BA2-S
(R7344)
(R7352)
(A side)
R7386
R7344
Pin 1
Pin 7
(
)
(R7386)
(CN9101)
CN9101
Pin 2
26
R7352
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Troubleshooting Reference 
Board Name
Board PWB  (B side)
Detail
BA2 W
(B id )
BA2-W
(C7348)
(C7349)
(C7350)
(B side)
(
)
C7348
C7350
C7349
R7386
R7344
BA2-W
(R7344)
(R7352)
(R7386)
(A side)
R7386
R7344
Pin 1
Pin 7
(R7386)
(CN9101)
CN9101
R7352
Pin 2
27
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Troubleshooting Reference 
Board Name
Board PWB  (B side)
Detail
BM
(B id )
BM
(C7348)
(C7349)
(C7350)
(B side)
C7348
C7350
(
)
C7349
BM
(R7344)
(R7352)
(R7386)
(A side)
R7344
R7386
(R7386)
(CN9101)
CN91
0
1
Pin 7
R7352
Pin 1
Pin 2
28
Page of 127
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