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Model
KDL-60W840B KDL-60W850B KDL-60W855B KDL-60W857B KDL-70W830B KDL-70W840B KDL-70W850B KDL-70W855B KDL-70W856B KDL-70W857B
Pages
112
Size
15.03 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LEVEL3
File
kdl-60w840b-kdl-60w850b-kdl-60w855b-kdl-60w857b-kd.pdf
Date
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Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual ▷ View online

Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
29
RB2G
CHASSIS
W850B
Troubleshooting
3-2-6. LED BLINKING 7x (Temperature Error)
7-time blinking
g
Setting 
circumstance is OK?
Set to another
No
Yes
circumstance  is OK?
Temperature, 
Ventilation, etc.
Set to another 
location, etc.
No
Panel
NG
Change B* Board,
and Aging a few 
hours
Symptom
B* Board
Symptom 
improvement
I2CA bus check:
HDMI is working? 
Yes
Temp sensor 
IC7001
No
I2CA bus dumping or 
Ayu2 / Ayu2L check
Note: 
(AYU2(BAX)/ 
Ayu2L(BAXL
) – IC9000
(Brownie)- IC9001
 
2.2-7 - LED Blinking: 7x (Temperature Error)
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
30
RB2G
CHASSIS
W850B
Troubleshooting
Troubleshooting Reference 
Board Name
Board PWB  (A side)
Detail
BAXL
BAXL
(IC7001)
IC7001
 
Troubleshooting Reference
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
31
RB2G
CHASSIS
W850B
Troubleshooting
3-3. No Sound
No Sound
“Audio System”
Check the 
“Speakers 
setting”
Change to 
“TV Speaker”
Audio System
“TV Speakers”
Change the 
Speaker
Harness
Replace
the BAX Board
NG
TV Speakers
Symptom 
improvement
No Sound: 
Audio 
BAX Board
Speaker 
Harness
Speaker
NG
Symptom 
improvement
No Sound: 
Tuner
No Sound: 
HDMI
Harness
 
2.3 - No Sound
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
32
RB2G
CHASSIS
W850B
Troubleshooting
3-3-1. No sound :Audio (for all model) TUS,TUW & BAX-L(HE-L,HM,HE-H) board only
#1
#1
#1
Check the 
No signal
#1 
Check the 
Check the 
No signal
Check the solder 
of IC4501 CP & CN
NG
NG
Digital out 
(use Video input)
IC9000 is NG
IC4501 VSS -3.3V
(IC4501 pin6)
CN3103 pin1
(SPDIF input)
OK
OK
of IC4501 CP & CN
(7&8pin) & C4501
Solder NG
OK
OK
NG
Ch
k th
IC4501 NG
CN3103 is NG
Check the 
Speaker Sound
(use Video input)
Power Amp Block (F4601,IC4601,etc) 
is NG. See item:  LED blinking 3x 
(Audio error)
Solder NG
Check the HP out
(use Video input)
OK
OK
Check the 
X_AUDIO_MUTE_
SPHPLO
pin5 is HIGH?
(Audio error)
No Problem
NO
This is MUTE situation.
Check IC9000
OK
(use Video input)
No Problem
NG
Check the 
INR+ & INL+ pin1 &14. 
(at CL4502 and CL4501)
Si
l i
i
?
IC9001 is NG
No signal
OK
Note: 
Check the IC4501
VDD 3.3V
(IC4501 pin9)
DC/DC converter is NG
See  No POWER DC / DC 
Converter Check
NG
IC4501 NG
Signal is coming?
OK
(AYU2(BAX)/ 
Ayu2L(BAXL
) – IC9000
(Brownie)- IC9001
OK
 
2.3-1 - No Sound: Audio (For All Model) TUS, BAX-L Board Only
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