Read Sony KD-55X8500A (serv.man2) Service Manual online
1) 3 times blinking (DC Alert, Audio Error & Communication Error)
3-2. STANDBY LED BLINK
KD-55X8500A/65X8500A(CH)
105
TROUBLE SHOOTING
3-time blinking
Check D+1.0V at
JL9129
on the B* Board
F9105,IC9103,etc
(B* Board)
Speaker
Check +3.3V_MAIN_1
at JL9116 on
the B* Board
Check
Speaker Impedance
at SP Connector
F9102,IC9102,etc
(B* Board)
Check AUDIO+12.5V
at pin 9/10/11 of
CN9101 on
the B* Board
G* Board
Check +12.5V
at Power Amp side
of F4201/F4202/F4203
on
the B* Board
F4201,IC4201,etc
(B* Board)
IC4201,etc
(B* Board)
DC_ALERT
NG
OK
NG
OK
AUDIO
NG
OK
NG
OK
NG
OK
#2
#3
DMD_TU_I2C
or
I2CB bus check:
Probe CL2205,
CL2206
I2C bus dumping or
AYU2
I2CA bus check:
Probe CL5023,
CL5024
I2CA bus
dumping
resistor
or AYU2
TUNER
NG
OK
NG
HDMI
OK
I2C_CCP check
R8502 and
R8503
NG
OK
Brownie
I2C_CCP Pull
Up
Check +1.8V_MAIN on
Pin 2 of IC9201
IC9201,etc
(B* Board)
Check +5V_MAIN
at JL9132 on
the B* Board
NG
OK
IC9101,etc
(B* Board)
SPIC check
Probe RB8522
OK
SPI dumping
resistor
or AYU2
Please see the next page about #2 and #3.
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