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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
Troubleshooting Reference 
Board Name
Board PWB  (B side)
Detail
BKE
(B side)
C7349
BKE
(C7348)
(C7349)
(C7350)
(B side)
C7348
C7350
BKE
(R7344)
(R7352)
(R7386)
(A side)
R7352
(R7386)
(F9301)
R7344
R7386
F9301
29
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Board Name
Board PWB  (B side)
Detail
BKX
(C7348)
(C7349)
(C7350)
(B side)
C7349
(C7350)
C7348
C7350
C7348
BKX
(R7344)
(R7352)
(A side)
C7350
R7352
(R7352)
(R7386)
(F9301)
F9301
30
R7344
R7386
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Board Name
Board PWB  (B side)
Detail
C7349
BKJ
(C7348)
(C7349)
(C7350)
(B side)
C7349
(C7350)
C7348
C7350
BKJ
(R7344)
(R7352)
(A side)
C7350
R7352
(
)
(R7386)
(F9301)
F9301
R7386
31
R7344
R7386
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
AYU2 Fail Suspected
3-1-3.  No POWER:  Ayu2 Failure
AYU2 is working,
but specific block fails;
like no picture, 
I/O damage etc
Yes
See AYU2 
replacement flow
I/O damage, etc
No
Y
Store Error 
message.
N
Find Some
Error message
R
NAND d t f il
AYU2  LOG is displayed
No
Yes
Yes
No
Check RawNAND
using CheckSW
No
If it is 
unacceptable 
Errors,
it is RawNAND
device failure
Check DDR
using CheckSW
Find Some
Error message
DDR d
i
f il
No
Yes
RawNAND data fail
No
Store SW log,
Check SW behaviors.
AYU2  power is OK 
Yes
Check 
DDR & RawNAND
interface
device failure
Data fails are 
especially in 
environment area.
If thi A
h
DDR device fail
Erase RawNAND
From the error 
message, we can 
find which device 
has failure.
Software was written
Yes
No
If this Area has 
broken, check soft 
cannot run
In this case, 
corrupted data are 
written to NAND 
flash in proper 
Erase RawNAND
has failure.
Move to device 
analysis phase.
Software was written
successful ly
at least one time
Replace  both  
AYU2 & RawNAND
No
es
way.
So, we have to 
check the logs of 
exception or errors. 
Erase RawNAND
Note:
32
Replace Ayu2
Erase RawNAND
is a last option.
Note: 
(AYU2) – IC9000
(Brownie)- IC9001
Page of 127
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