Sony KD-55X8500A Service Manual page 105

3-2. STANDBY LED BLINK
1) 3 times blinking (DC Alert, Audio Error & Communication Error)
3-time blinking
DC_ALERT
Check D+1.0V at Check D+1 0V at NG NG
F9105,IC9103,etc
JL9129
on the B* Board
OK
NG
Check +3.3V_MAIN_1
F9102,IC9102,etc
at JL9116 on
the B* Board
OK
NG
Check +1.8V_MAIN on
Pin 2 of IC9201
OK
NG NG
Check +5V_MAIN
at JL9132 on
the B* Board
KD-55/65 X8500A/ X8504A
DMD_TU_I2C
I2CB bus check: I2CB bus check:
Probe CL2205,
(B* Board)
CL2206
OK
SPIC check
Probe RB8522
(B* Board)
OK
I2C_CCP check
R8502 and
IC9201,etc
R8503 R8503
(B* Board)
OK
I2CA bus check:
IC9101,etc
Probe CL5023,
(B* Board)
CL5024
OK OK
TUNER
NG
or
I2C bus dumping or p g
AYU2
Brownie
SPI dumping
resistor
or AYU2
I2C_CCP Pull
Up U
HDMI
NG
I2CA bus
dumping
resistor
or AYU2
TROUBLE SHOOTING
AUDIO
Check
NG
Speaker Impedance
at SP Connector
OK
Check AUDIO+12.5V
NG
at pin 9/10/11 of
CN9101 on
the B* Board
OK
Check +12.5V Check 12.5V
at Power Amp side
NG
F4201,IC4201,etc
of F4201/F4202/F4203
on
the B* Board
OK OK
IC4201,etc
(B* Board)
#3
Please see the next page about #2 and #3.
Speaker
G Board G* Board
(B* Board)
#2
105