Panasonic SA-MAX3500PU - Troubleshooting: No Sound (USB)

22
7.3. No Sound at USB selector Only
Press Power Button of Unit
or Remote Control to Turn
ON the Unit
No
Yes
No
Yes
No
Check SOC
IC1001
(Pin 81, 82, 83,
84)
Change series
resistors R1011,
R1012, R1023,
R1014, or
IC1001
Select USB A or USB B selector,
connect USB device, play source.
No Sound comes out from speaker
End
Yes
Yes
Check
IC9002/IC9003
pin 1= 5V?
(pin 21)
Check IC4001
PWM output signal
(pin 27-34)
Change:
IC9002 (USB-A)
IC9003 (USB-B)
Change
DSP
IC4001
1
2
Check IC1202
pin28(USB-A) or
pin27(USB-B)
High (3.3V) ± OK
3
Change:
RX1207
4
No