Read Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-60W858B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual online
RB2G
CHASSIS
W830B/ W840B/ W850B/ W855B
W856B/ W857B
Troubleshooting
3-2. LED BLINKING
3-2-1. LED Blinking: 3x (DC Alert & Communication Error)
3 2. LED BLINKING
3-times blinking
DC ALERT
Check
AUDIO
NG
Check D+1.0V at
JL9003 / JL9127 on
the B* Board
F9105,IC9103,
Etc (B* Board)
DC_ALERT
NG
Change TUS/TUW
Board
NG
Speaker
Speaker Impedance
at SP Connector
Check
OK
Check
+3 3V MAIN 1
OK
NG
TUNER Board
OK
Audio +12.5V
at pin 18/20 of CN9101
on the B* Board
(except Adapter
model)
G* Board
NG
OK
+3.3V_MAIN_1
at JL9117
on
the B* Board
F9104,IC9104,
etc (B* Board)
etc (B* Board)
OK
Check
+12.5V / +19.5V
at Power Amp side
of F4401 / F4601 on
the B* Board
F4401 / F4601,
IC4901 / IC4601
,etc
(B* Board)
OK
NG
Check
+1.8V_MAIN on
Pin 2 of IC9201
IC9201,etc
(B* Board)
NG
the B* Board
IC4901 / IC4601,etc
(B* Board)
OK
NG
Check
+5.0V_MAIN
at JL9113 / JL9112 on
OK
IC9102 / IC9101
etc (B* Board)
the B* Board
(
)
Size
B* Board
G* Board
12
60”
BAXL
G2SB
70”
BAXL
G2SB
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