Sony KD-55X8500A Service Manual ▷ View online
TROUBLE SHOOTING
3-4. NO PICTURE
No Picture
Video 1
No Picture
Video 2
No Picture
Component
No Picture
Check if input OSD
is GREY OUT
Check J3101
connection,
VIDEOA_DET
OK
Check if input OSD
is GREY OUT
NG
Check J3104 Conn
VIDEOB_DET,
CR_DET
Check if input OSD
is GREY OUT
Check J3104
Connection,
VIDEOB_DET
OK
NG
OK
NG
OK
Check wave between
C3106 and IC9001
Detailed check
J3101 signal path
NG
OK
Check wave
Between C3120/C3121
and IC9001
Detailed check
J3104 signal path
NG
OK
OK
Check wave between
C3120 and IC9001
Detailed check
J3104 signal path
NG
OK
OK
NG
HDMI EQ [IC5009]
Problem
NG
NG
Detailed SDIF path
Check between
IC9001 and IC9000
Check signal
Confirm HDMI
input working
OK
Detailed TMDS path
NG
Detailed SDIF path
Check between
IC9001 and IC9000
Check signal
NG
OK
Confirm Analog RF
input working
Check signal
between IC9001 and
IC9000 [R8633]
OK
p
check between
IC9001 and IC5009
Confirm other analog
Input working
NG
Check signal
between IC9001 and
IC5009 [RB5008]
NG
Brownie [IC9001]
Problem
OK
Confirm Analog RF
input working
Check signal
between IC9001 and
IC9000 [R8633]
OK
Brownie [IC9001]
P bl
Ayu2 [IC9000]
Or Backend
Ayu2 [IC9000]
Or Backend
Input working
OK
IC5009 [RB5008]
Brownie [IC9001]
Problem
OK
Problem
Problem
Problem
Problem
Ayu2 [IC9000]
Or Backend
Problem
113
Change B* board
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
Backlight Issue
No Picture
All blue picture is on?
(Factory SW is booted.)
No
Replace
the B-Tcon, B-LD*
FFC
NG
Check the G*- LD*
Harness
Change B* Board
OK
NG
B* Board
Yes
B-Tcon, B-LD*
FFC
B* Board
Harness
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
LCD Panel
(T-con, LD*)
Change G* Board
NG
G* Board
Symptom
improvement
improvement
114
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
3-5. SIDE BUTTONS MALFUNCTION
HUS button
malfunction
malfunction
Check Harness on HUS and
B* Board properly connected
Check Harness pin Assignment
According to circuit.
According to circuit.
OK
Probe at Key_AD line and
check the signal
check the signal
Change HUS
NG?
OK
OK
Change B* Board
NG
NG
Loose harness
connect properly
connect properly
Change Harness
g
connect properly
115
KD-55/65 X8500A/ X8504A
TROUBLE SHOOTING
3-6. IR REMOTE COMMANDER MALFUNCTION
IR do not response to
Remote Commander
Remote Commander
Check remote
control
control
Change remote
control
Center white LED
light at power
indicator
OK
NG
OK
NG
OK
NG
Check whether center
white LED blink ,when using
white LED blink ,when using
commander near the sensor
windows
OK
Change SmartCore (mechanical)
NG
Check harness
connection is OK
on HIF and HSF
connection is OK
on HIF and HSF
Loose harness
NG
connect properly
Problem with Smart Core
HSF or HIF
or HSF‐HIF harness
Check harness
connection is OK
on HSF and B*Board
connection is OK
on HSF and B*Board
OK
NG
OK
OK
Change SmartCore
Change
HSF B* b
HSF B* b
d H
NG
HSF‐B* board harness
OK
HSF-B* board Harness
problem
NG
Change B*Board
116
KD-55/65 X8500A/ X8504A
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