DOWNLOAD Sony KD-55X8500A Service Manual ↓ Size: 10.55 MB | Pages: 127 in PDF or view online for FREE

Model
KD-55X8500A
Pages
127
Size
10.55 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kd-55x8500a.pdf
Date
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TROUBLE SHOOTING
1) 3 times blinking (DC Alert, Audio Error & Communication Error)
3-2. STANDBY LED BLINK
3-time blinking
Check D+1 0V at
DC_ALERT
NG
DMD_TU_I2C 
or 
I2CB bus check:
I2C bus dumping or 
TUNER
NG
Check D+1.0V at
JL9129
on the B* Board
F9105,IC9103,etc
(B* Board)
Speaker
Check
Speaker Impedance
at SP Connector
NG
OK
AUDIO
NG
I2CB bus check:
Probe CL2205,
CL2206
p g
AYU2
Brownie
OK
Check +3.3V_MAIN_1
at JL9116 on
the B* Board
F9102,IC9102,etc
(B* Board)
Check AUDIO+12.5V
at pin 9/10/11 of
G* Board
NG
NG
OK
SPIC check
Probe RB8522
SPI dumping 
resistor
or AYU2 
CN9101 on
the B* Board
G  Board
Check +12.5V
OK
OK
OK
I2C_CCP check
R8502 and 
R8503
I2C_CCP Pull 
U
Check +1.8V_MAIN on 
IC9201,etc
NG
Check  12.5V
at Power Amp side 
of F4201/F4202/F4203
on
the B* Board
F4201,IC4201,etc
(B* Board)
NG
OK
#2 
HDMI
R8503
NG
OK
Up 
Pin 2 of IC9201
(B* Board)
OK
IC4201,etc
(B* Board)
OK
#3
I2CA bus check:
Probe CL5023,
CL5024
I2CA bus 
dumping 
resistor
or AYU2 
NG
OK
NG
Check +5V_MAIN
at JL9132 on
the B* Board
IC9101,etc
(B* Board)
105
OK
Please see the next page about #2 and #3.
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
#3
F4201,IC4201,F4202,IC4202,F4203,IC4203
(B* Board)
#2 
IC4201,IC4202,IC4203
(B* Board)
#3
Check 12.5V to GND
i
d
(
)
Replace broken fuse.
High
enough
Check the IC4201,IC4202 and IC4203
Out  pin 9, 16, 25, 32
Switching 0V to 12V
around 300 400kHz
No
IC or parts around it
NG
impedance
p
Low impedance
around 300-400kHz
Yes
IC4201,IC4202,IC4203
burn or broken ?
Check broken parts
around broken IC.
Check the CN4802
DC level ~2V
No
L4201-L4208 
or 
C4234-C4241
NG
Y
No
Replace broken IC
Yes
Yes
Check the IC4201-IC4203
I2S line pin 5, 6, 7, 8
IC9000 or around parts NG
No
IC4201-IC4203 NG
Yes
106
If there is no failure, Replace B* board.
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
2) 4 times blinking (LED Voltage Error)
4-time blinking
Check JL9112
(BACKLIGHT_MON) 
on the B* Board
LED driver
Between 0.98V to 1.23V
B* Board
107
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
3) 5 times blinking (T-Con Error)
5-time blinking
Panel (T-con)
h
B* Board
NG
Check PANEL_VCC
12.5V at pin 47-51 of
CN8001 on
on the B* Board
G* Board
change
B  Board
NG
Symptom 
improvement
Confirm Tcon12V.
on the B  Board
Replace the Harness
Panel (T-con)
About 12.5V OK
Symptom 
improvement
Replace the Harness 
Between G* and Panel
Harness
NG
Replace the Harness
Between CN3802 and Tcon
(41pin)
VBO Harness
Symptom 
improvement
NG
108
KD-55/65 X8500A/ X8504A
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