Panasonic SC-HTB250GA Service Manual page 14

Change
LED PCB
7.1.4. No Key Function
Press remote control
Connect the AC
"Power" button to
mains lead
Power ON unit
Go to "No Power"
7.1.5. No remote control function
Checking
Remote Control
Connect the AC
mains lead
Checking
Main Unit
7.1.6. No HDMI out
If the pairing failure,
Go to "Bluetooth® Pairing failure"
Press the Power
button to turn on the
unit
Press the Power
button to turn on the
unit
Go to
"No Sound (Bluetooth®)"
No Key Function
Check the Main
OK
C117~U16 Pin 8
at "3.3V"
[Refer to check point ③]
NG
NG
Change
Main PCB
No remote control function
Turn ON Mobile Phone
camera and point to
remote control IR LED
Press Main set "Power" OK
button to
Power ON unit
NG
Go to "No Power"
No Sound (Bluetooth®)
No HDMI ARC
select "HDMI(ARC)"
source and connect
Press the Power
TV with ARC to HDMI
button to turn on
Bluetooth® device
the unit.
NG
"Bluetooth® Pairing failure"
No Sound (Optical)
Select "OPTICAL"
source and connect
BD/DVD device
3.3V at Pin 2/3/4/5/6
OK of Main CP4
[Refer to check point
④]
NG
Change
Main PCB
Press and hold any
remote control
button
3.3 V at Pin 8 of
OK
Main CP2
[Refer to check point ⑥]
NG
Change
Main PCB
Yes
No Sound output
OK
Connect Playback
No sound
Go to
Yes
No Sound
output
14
3.3 V at Pin 2/3/4/5/6
OK
of Key CN4
[Refer to check point
⑤]
NG
Check the cable is
connected correctly
(Main CP4 to KEY CN4)
NG
Connect correctly or
change the cable
NG
Remote Control IR
LED flashing
OK
3.3 V at Pin 8 of
OK
IR CN2
[Refer to check point ⑦]
NG
Check the cable is
connected correctly
(Main CP4 to Key CN4)
NG
Connect correctly or
change the cable
Change
HDMI cable
Yes
Change
Main PCB
Change
OPTICAL cable
OK Change
Key PCB
OK
Change Remote
Control or battery
Change IR PCB
NG
Change
Main PCB
Still
No Sound
output
Yes
Change
Main PCB
Still
No Sound
output
Yes
Change
Main PCB