Sony KD-43X8301C Service Manual ▷ View online
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
125
TROUBLE SHOOTING
3-6. SIDE BUTTONS MALFUNCTION
Side Key button
malfunction
Harness on Switch Unit
and B* Board properly connected
Change
Switch unit-B* board Harness
Harness
connection
issue
Change B*Board
Change Switch Unit
Switch unit issue
Harness issue
OK
NG
NG
OK
OK
Power Key (B*Board)
Check parts value :
0 ohm < R1089 < 2 ohm
4.4k ohm < R1432 < 5k ohm
Muffin IC1000
problem
NG
Power Key Muffin Pin (B*Board)
Check voltage(Power ON condition) :
3.13V < Voltage < 3.47V
NG
OK
NG
Key AD(B*Board)
Check parts value :
0 ohm < R1091 < 2 ohm
0 ohm < R1042 < 2 ohm
NG
OK
Parts Broken issue
Key AD muffin pin (B*Board)
Check voltage (Power ON condition):
1.62V < voltage < 1.84V
NG
OK
OK
NG
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
126
TROUBLE SHOOTING
Harness on H-board
and B* Board
properly connected
B*Board
Check parts value :
R1080 = zero ohm
Check whether center
white LED blink ,when using
commander near the sensor
windows
SIRCS (IC1000 Pin Y35 , B*Board)
Check voltage (Power ON condition):
3.287V < Voltage < 3.55V?
IR do not response to
Remote Commander
Remote control battery
could be weak.
Change battery.
Center white LED
lit up when remote
control is pressed
Change
H-B* board Harness
H-B* board harness
issue
Harness
connection
issue
Change Smart Core
OK
Smart core issue
NG
OK
OK
NG
NG
NG
OK
OK
NG
Change B*Board
Muffin IC1000
problem
OK
NG
Parts Broken issue
OK
3-7. IR REMOTE COMMANDER MALFUNCTION
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
127
TROUBLE SHOOTING
LIGTH_SENSOR (Muffin Pin L35)
Check voltage variation from
room light to dark condition
B*Board
Check LIGTH_SENSOR signal path :
R1079 = zero ohm
Backlight doesn’t change
when ambient lighting
level changed
Check UI setting for light
Sensor. Make sure it is “on”
Change the UI setting
to “ON”
OK
Harness on H-board and
B* Board properly connected
Harness connection
issue
NG
User did not activate light
sensor function
OK
Change
H-B* board Harness
NG
OK
Change Smart Core
OK
NG
NG
H-B* board harness
issue
Smart Core issue
NG
Change B*Board
Muffin IC1000 problem
OK
OK
NG
Part broken issue
3-8. LIGHT SENSOR ERROR
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
128
TROUBLE SHOOTING
[Network Set-up]
>[Wired Set-up]
on the TV
Ethernet Cable
Connection Results
Cable Connection
Proxy setting
OK
Connection Results
Local Access
Connection Results
Internet Access
Failed
OK
Failed
Failed
Wired Set-up
IP address setting
Auto
Check
Local router
DHCP server
Manual
Check IP address
&
Local router setting
Check cable
B board
OK
NG
B board
OK
3-9. NETWORK MALFUNCTION
1) Ethernet (Wired)
