Panasonic SC-HTB690EB Service Manual page 17

7.1.7. No Sound
7.1.7.1. No Sound (Bluetooth®)
Go to "Bluetooth® Pairing failure"
Touch the Power
button to turn on
the unit.
"No Key Function"
Touch the Power T h th P
button to turn on the
[Refer to check point ⑦]
unit
7.1.7.2. No Sound (Optical)
Touch the Power
button to turn on the
unit
7.1.8. No NFC
Touch the Power
button to turn on the
unit
No Sound (Bluetooth®)
If the pairing failure,
OK
Connect
Play sound
Bluetooth® device
NG
No HDMI OUT
Go to
select "BD/DVD"
OK
source
28 V at "HVDD"
and connect BD or
DVD device to HDMI
No No
Change
Main PCB
No Sound (Optical)
select "TV" source
and connect optical
device
select "Bluetooth"
No NFC
source and try to
connect NFC device
No sound
No
No problem
found
check 1.7V at
OK OK
"HDMI_1.7V"
Check PWM signal "HB_HP_1"
[Refer to check
[Refer to check point ⑧]
point ⑨]
No No
NG
Change
Change
Main PCB
Main PCB
check 3.3V at
OK
"VDD3.3_OP"
[Refer to check
point ⑩] point ⑩]
NG
Change
Main PCB
No NFC
check 3.3V at
OK
"STB_3V3"
[Refer to check
point ⑥]
NG NG
Change
Main PCB
17
Yes 3.3 V
at "STB_3V3"
[Refer to check point ⑥]
No
Change
Main PCB
check the FFC cable
OK
N No
OK
Sound
is connect correct
No problem found
Output
(Main XP13 to
HDMI CN1000)
No No
No
Change
connect correct connect correct
Main PCB
or change
FFC cable
check the cable is
No
connect correct
(Main XP112 to
Optical XP1) Optical XP1)
No
connect correct
or change the
cable
check the cable is
connect correct (FL
XP2 to NFC XP10)
No No
connect correct
or change the
cable
OK
Change
HDMI PCB
Change
Optical PCB
Change
NFC PCB