Led Blinking - Sony KDL-42W800A 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
B* Board Type
Size
Note: OTHERS JAPAN
(AYU2) – IC9000
42 BA2S
(Brownie)- IC9001
47 47 BA2S BA2S
55 BA2S
TUNER
NG
I2C bus dumping or I2C bus dumping or
AYU2
Brownie
SPI dumping
resistor
or AYU2
I2C_CCP Pull
Up U
HDMI
NG
I2CA bus
dumping
resistor
or AYU2
W800A/W801A/W802A/W804A/W805A/W806A/W807A/W808A/W809A
G* Board Type
CHINA ASIA AMERICA EUROPE JAPAN
BA2W GL2S GL2S GL2E(CH) GL2E(ID)
BA2W BA2W GL2S GL2S GL2S GL2S GL2E(CH) GL2E(ID) GL2E(CH) GL2E(ID)
BA2W GL2E(CH) GL2E(ID) GL2E(CH) GL2E(ID) GL2E(ID)
AUDIO
Check
NG
Speaker Impedance Speaker
at SP Connector
OK
Check AUDIO+12.5V
NG
at pin 8/10 of
CN9101 on
Adapter (LW)
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
Note:
G BOARD : ( N/A FOR THIS MODEL)
RB1G CHASSIS
GL2S
GL2S GL2S
G-board /
31