Active Subwoofer (Sb-Hwa250) - Panasonic SC-HTB250GA Service Manual

7.2

Active Subwoofer (SB-HWA250)

7.2.1 No power
Connect the AC
LED not light up
mains lead
Connect the AC
LED not light up
mains lead
7.2.2 No sound
Press the power button
on the unit to turn on
the main unit and
Press the power button
active subwoofer .
on the unit to turn on
the main unit and
active subwoofer .
7.2.3. Check Points
MAIN P.C.B.
2
5.2V
Check the Main Q1
power output at 24V
Check the Main Q1
[Refer to check point ①]
power output at 24V
[Refer to check point ①]
NG
NG Change
Power PCB
Change
Power PCB
Change Subwoofer
Box Unit
Change Subwoofer
Box Unit
The main unit and active
subwoofer Pairing
success
s success
The main unit and active
subwoofer Pairing
success
s success
No power
No power
Check the Main L4 5.2V
OK
at "5.2V"
Check the Main L4 5.2V
[Refer to check point②]
OK
at "5.2V"
[Refer to check point②]
NG
Change
Main PCB
Change
Main PCB
NG
Change Wireless RX
Module PCB
NG
Change Wireless RX
Module PCB
No sound
No sound
Input audio signal Sound can be heard.
Input audio signal
Check audio data
Change Subwoofer
OK
from Speaker terminal
Box Unit
Change Subwoofer
OK
Box Unit
18
Check the cable is
OK
connected correctly
Check the cable is
(Main J5 to Wireless J2)
OK
connected correctly
(Main J5 to Wireless J2)
NG
NG
Connect correctly or NG
change the cable
Connect correctly or
change the cable
Check the cable is
OK
connected correctly
(Main J1 to LED J1B Check the cable is
OK
connected correctly
NG
(Main J1 to LED J1B
Connect correctly or
NG
change the cable
Connect correctly or
change the cable
Check the FFC cable
NG
(Main J5 to Wireless
J2) for damages
NG
NG
Sound can be heard.
Change FFC cable
Check audio data from
OK
RX Module
(Main J3) (Main J5 Pin 10)
Check audio data
OK
NG NG
from Speaker terminal
(Main J3)
Change Change Wireless
Main PCB RX Module PCB
NG
Change
Main PCB
24V
1
OK
OK
OK
Check the FFC cable
OK
(Main J5 to Wireless
J2) for damages
NG
Change FFC cable
Check audio data from
RX Module
(Main J5 Pin 10)
NG
Change Wireless
RX Module PCB