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
9
Chassis: RB2G, HE-H
1.2 - CIRCUIT BOARDS LOCATION
SECTION 1: DIAGRAMS
SMART CORE
SWITCH
UNIT
MAIN BOARD
(BAX-L BOARD)
TUNER BOARD
(TUS BOARD)
POWER BOARD
(G2B BOARD)
LD BOARD
TCON
SMART CORE
SWITCH
UNIT
MAIN BOARD
(BAX-L BOARD)
TUNER BOARD
(TUS BOARD)
POWER BOARD
(G2B BOARD)
LD BOARD
TCON
HSC2 BOARD
WIRELESS
LAN CARD
BT MODULE
Figure 1-1. 60” Models
Figure 1-2. 70” Models
Figure 1-3. Smart Core
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
10
SECTION 2: TROUBLESHOOTING
2.1-1 - No Power
RB2G
CHASSIS
W850B
SECTION 3
TROUBLESHOOTING
Troubleshooting
3-1. NO POWER
3-1-1. NO POWER
No Power
Parts
Board PWB (BAXL- A side)
Detail
Check STBY 3.3V
L9107 or C9179
G2B Board
Replace
Between G2B Board to
BAXL Board Harness
NG
NG
OK
Parts
Board PWB (BAXL A side)
Detail
(L9107)
1
L9107
Harness
OK
OK
BAXL Board
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
11
2.1-2 - No Power: DC / DC Converter Check
RB2G
CHASSIS
W850B
Troubleshooting
3-1-2. No POWER - DC/DC converter check
START
Check
C9137
Voltage.
Ch
k F9101
no
Check
C9175
Check F9105
no
Is the voltage 5V?
Check
C9192
Voltage.
Check F9101
Check F9102
yes
no
is it 1.0V?
Check F9105
Check
C9167
is it 1 15V?
Check F9106
no
Is the voltage 5V?
Check
C9153
Voltage.
Is the voltage 3 3V?
Check F9104
yes
no
END
yes
is it 1.15V?
Is the voltage 3.3V?
Check
C9172
Voltage.
Is the voltage 1.5V?
Check F9104
yes
no
yes
Size
B* Board
G* Board
60”
BAXL
G2SB
70”
BAXL
G2SB
RB2G
CHASSIS
W850B
Troubleshooting
3-1-2. No POWER - DC/DC converter check
START
Check
C9137
Voltage.
Ch
k F9101
no
Check
C9175
Check F9105
no
Is the voltage 5V?
Check
C9192
Voltage.
Check F9101
Check F9102
yes
no
is it 1.0V?
Check F9105
Check
C9167
is it 1 15V?
Check F9106
no
Is the voltage 5V?
Check
C9153
Voltage.
Is the voltage 3 3V?
Check F9104
yes
no
END
yes
is it 1.15V?
Is the voltage 3.3V?
Check
C9172
Voltage.
Is the voltage 1.5V?
Check F9104
yes
no
yes
Size
B* Board
G* Board
60”
BAXL
G2SB
70”
BAXL
G2SB
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
12
RB2G
CHASSIS
W850B
Troubleshooting
Troubleshooting References
Board
Name
Name
Board PWB (A side)
Detail
Troubleshooting References
BAX-L
1.C9137 [5V]
F9101
F9101
1
2
F9102
3, 4
C9153
F9104
5
1 2
2.C9192 [5V]
F9102
3.C9153 [3.3V]
F9104
C9137
C9172
3,4
6
4.C9172 [1.5V]
F9104
5.C9175 [1V]
F9105
C9192
C91
5
6
6.C9167[1.15V]
F9106
C9175
F9105
C9175
F9106
Size
B* Board
G* Board
60”
BAXL
G2SB
70”
BAXL
G2SB
Troubleshooting References
RB2G
CHASSIS
W850B
Troubleshooting
3-1-2. No POWER - DC/DC converter check
START
Check
C9137
Voltage.
Ch
k F9101
no
Check
C9175
Check F9105
no
Is the voltage 5V?
Check
C9192
Voltage.
Check F9101
Check F9102
yes
no
is it 1.0V?
Check F9105
Check
C9167
is it 1 15V?
Check F9106
no
Is the voltage 5V?
Check
C9153
Voltage.
Is the voltage 3 3V?
Check F9104
yes
no
END
yes
is it 1.15V?
Is the voltage 3.3V?
Check
C9172
Voltage.
Is the voltage 1.5V?
Check F9104
yes
no
yes
Size
B* Board
G* Board
60”
BAXL
G2SB
70”
BAXL
G2SB
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