Led Blinking - Sony KDL-40W580B Service Manual

Troubleshooting

3-2. LED BLINKING

3-2-1. LED Blinking: 3x (DC Alert & Communication Error)
3-time blinking
DC_ALERT
NG
Check D+1.0V at
JL9003 / JL9127 on
the B* Board
OK
Check
NG
+3.3V_MAIN_1
at JL9117 on
the B* Board
OK
NG
Check
+1.8V_MAIN on
Pin 2 of IC9201
OK
Check
NG
+5.0V_MAIN
IC9102 / IC9101
at JL9113 / JL9112 on
the B* Board
Change TUS/TUW
Board
F9105,IC9103,
Etc (B* Board)
OK
TUNER Board
F9104,IC9104,
etc (B* Board)
IC9201,etc
(B* Board)
,etc (B* Board)
Note: For location details, refer to troubleshooting Reference for parts location.
TUNER
NG
at pin 18/20 of CN9101
(except Adapter model)
W580B/W585B/W590B/W600B/W605B/W607B/W608B/WM15B
AUDIO
Check
NG
Speaker Impedance Speaker
at SP Connector
OK
Check
Audio +12.5V
NG
G* Board
on the B* Board
OK
Check
F4401 / F4601,
+12.5V / +19.5V
NG
IC4901 / IC4601
at Power Amp side
,etc
of F4401 / F4601 on
(B* Board)
the B* Board
OK
IC4901 / IC4601,etc
(B* Board)
Size G** Board Type B* Board
40" Not applicable
48" Not applicable
RB2G
CHASSIS
BAX_L
BAX_L
12