Sony KDL-42W850A / KDL-47W850A / KDL-55W850A Service Manual ▷ View online
RB1G
CHASSIS
W850A
Troubleshooting
Troubleshooting Reference
BM board Side B
BM board -Side B
F4601
CL4606
9
16
25
32
CL4
6
0
CL46
0
CL46
0
CL46
0
IC4601
JL4621
JL4622
JL4623
0
2
0
1
0
3
0
4
45
JL4624
RB1G
CHASSIS
W850A
Troubleshooting
3-2-3. LED BLINKING 3x (Audio Error) – BKE and BKX board only (not applicable for this model)
(*)
Size
B* Board Type G* Board Type
42”
BA2-S
GL2S
F4601,IC4601,etc
(B* Board)
#2
IC4601,etc
(B* Board)
#3
42
BA2 S
GL2S
47”
BA2-S
GL2S
55”
BA2-S
GL2E
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:
46
IC4601 NG
(AYU2) – IC9000
(Brownie)- IC9001
(Brownie)- IC9001
RB1G
CHASSIS
W850A
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
47
RB1G
CHASSIS
W850A
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
48
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