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  • KDL-46W950A, KDL-46W954A, KDL-46W955A, KDL-46W957A, KDL-55W950A, KDL-55W954A, KDL-55W955A, KDL-55W957A

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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
3-2-3. LED BLINKING  3x (Audio Error) – BKE and BKX board only (Not applicable for this model)
F4601,IC4601,etc
(B* Board)
#2 
IC4601,etc
(B* Board)
#3
Check 19.5V
(at fuse F4601)
to GND
Replace F4601
High
enough
Check the IC4601
Out  pin 38, 42,  43, 47
Switching 0V to 19V
No
Check the IC4601
pin 18 
(at CL4606)
is HIGH?
No
impedance
Low impedance
IC4601 or parts around IC4601 NG
around 300-400kHz
Yes
Yes
Solder NG
IC4601 
Check broken parts
IC4601 or parts around IC4601 NG
Check the CN4601
DC level ~9.7V 
No
L4601-L4604 
or
C4611-C4614 
No
burn or broken ?
Yes
around IC4601
(at JL4621~JL4624)
C 6
C 6
NG
Yes
Check the IC4601
I2S line pin
NG
Replace IC4601
I2S line pin 
4, 12, 15, 16 
(at 
CL4601~CL4604)
IC9000 NG
OK
Note: 
49
IC4601 NG
(AYU2) – IC9000
(Brownie)- IC9001
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Troubleshooting Reference 
BKE and BKX board Side A (Not applicable for this model)
BKE and BKX board Side A (Not applicable for this model)
CL4
6
CL4
6
CL4
6
F4601
6
02
6
04
6
03
IC4601
CL4601
IC4601
32
42 43
47
50
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
Troubleshooting Reference 
BKE and BKX board Side B (Not applicable for this model)
BKE and BKX board Side B (Not applicable for this model)
JL4621
JL4622
JL4624
JL4622
51
RB1G
CHASSIS
W950A/ W954A/ W955A/ W957A
Troubleshooting
3-2-5. LED Blinking 5x (T-Con Error) (HG and TE Model)
3-2-4. LED Blinking 4x (LED Voltage Error)
5-times blinking
Panel
(T-con)
change
B* Board
NG
4-times blinking
Between 0 98V to 1 23V
Check PANEL_VCC
12.5V at pin 47-51 of
CN8001 on
on the B* Board
G* Board
Panel (T-con)
About 12.5V
NG
OK
Symptom 
improvement
Confirm Tcon12V.
Check JL9112
(BACKLIGHT_MON) 
on the B* Board
LED driver
Between 0.98V to 1.23V
Replace the Harness 
Between G* and Panel
Harness
Symptom 
improvement
B* Board
Replace
the LVDS Harness
LVDS Harness
Symptom 
improvement
NG
NG
For  Ayu2(IC9000) replacement check related section
Size
B*
Board 
Type
G*
Board 
Type
46”
BM
G3A
52
46”
BM
G3A
55”
BM
G3B
Page of 127
Display

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