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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 
33
RB2G
CHASSIS
W850B
Troubleshooting Reference 
TUS  board Side B
CN3103
Vcc
Vin (pin 1)
 
TUS Board (Side B)
 
 Trouble Shooting Reference
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
34
RB2G
CHASSIS
W850B
Troubleshooting Reference 
BAX-L board Side A
BAX-L board Side A
P
in 5)
E
_
M
U
T
E
_
S
P
H
L
O
 (
P
INR+
(Pin1)
X
_
AUDIO_
MUT
E
Vss
(Pin
6)
CN
(Pin
7)
4
502
C4501
CL
4
IC4501
01
P
(Pin
8)
D
(Pin
9)
(Pin14)
CL45
C
P
V
D
D
INL+
(
 
BAX-L Board (Side A)
 
 Trouble Shooting Reference
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
35
RB2G
CHASSIS
W850B
Troubleshooting
No
Checking Item
OK
NG
3-3-3. Main Board Power Off Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM) board only
1
Check fuse F4601
Fuse short
Fuse open
2
Check connectivity audio Vcc to GND
C4606 – GND
No short to GND
Either 1 short to GND
C4607 – GND
C4608 – GND
C4609 – GND
3
Check connectivity audio +3 3V MAIN to GND
No short to GND
Either 1 short to GND
3
Check connectivity audio +3.3V_MAIN to GND 
(only for BAX-L board)
IC4601 (Pin8)  – GND
IC4601 (Pin27) – GND
No short to GND
Either 1 short to GND
4
Ch
k
ti it
di
t
t t GND
N
h t t GND
Eith
1 f i
h t t GND
4
Check connectivity audio output to GND.
CN4601
Pin 1 – GND
Pin 2 – GND
Pin 3 – GND
No short to GND
Either 1 of pin short to GND
Pin 4 – GND
RB2G
CHASSIS
W850B
Troubleshooting
No
Checking Item
OK
NG
3-3-3. Main Board Power Off Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM) board only
5
Check connectivity audio output path
(only for BAX-L board):
L4601 (near to IC side) – CN4601 Pin4
L4602 (near to IC side) – CN4601 Pin3
Must have good connection 
(~0 
Ω)
Open circuit.
(
)
L4603 (near to IC side) – CN4601 Pin2
L4604 (near to IC side) – CN4601 Pin1
 
2.3-2 - No Sound: Main Board Power Off Checking (For Main Speaker L & R) For BAX-L Board Only
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
36
RB2G
CHASSIS
W850B
BAX-L board Side A
Troubleshooting Reference 
BAX L board Side A
L4604
L4603
L4602
L4601
Pin
 1 
Pin
 2 
Pin
 3 
Pin
 4 
CN4601
 
BAX-L Board (Side A)
 
 Trouble Shooting Reference
Page of 112
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