Led Blinking 3X (Dc Alert, Audio Error And Communication Error) - Sony KDL-40W900A Service Manual

Troubleshooting
3-2. LED Blinking
3-2-1. LED BLINKING 3x (DC Alert, Audio Error & Communication Error)
3-time blinking
DC_ALERT
NG NG
Check D+1.0V at Ch k D 1 0V t
F9105,IC9103,etc
JL9129
(B* Board)
on the B* Board
OK
NG
Check +3.3V_MAIN_1
F9102,IC9102,etc
at JL9116 on
(B* Board)
the B* Board
OK
NG
Check +1.8V_MAIN on
IC9201,etc
Pin 2 of IC9201
(B* Board)
OK
NG
Check +5V_MAIN
IC9101,etc
at JL9132 on
(B* Board)
the B* Board
DMD_TU_I2C
or
I2CB bus check: I2CB bus check:
Probe CL2205,
CL2206
OK
SPIC check
Probe RB8522
OK
I2C_CCP check
R8502 and
,
R8503 R8503
OK
I2CA bus check:
Probe CL5023,
CL5024
OK OK
TUNER
NG
I2C bus dumping or I2C bus dumping or
AYU2
Brownie
SPI dumping
resistor
or AYU2
I2C_CCP Pull
U Up
HDMI
NG
I2CA bus
dumping
resistor
or AYU2
(*)
Size B* Board Type G* Board
OTHERS JP
40" BA2-S BA2-W
46" BA2-S BA2-W
55" BA2-S BA2-W
AUDIO
Check
NG
Speaker Impedance Speaker
at SP Connector
OK
Check AUDIO+12.5V
NG
at pin 8/10 of
G* Board G Board
CN9101 on
the B* Board
OK
Check +12.5V Check +12 5V
at Power Amp side
NG
F4601,IC4601,etc
of F4601
(B* Board)
on
the B* Board
(Continue) #2
OK OK
IC4601,etc
(B* Board)
(Continue) #3
RB1G CHASSIS
W900A/904A/905A
Type
G1A
G1A
G1B
35