Panasonic SA-MAX3500PU Service Manual page 32

7.8. FL Show "No Device" at USB selector Only
Press Power Button of Unit
or Remote Control to Turn
ON the Unit
Select USB A or USB B selector,
connect USB device, No TOC
Check 5V Supply
at IC9002(USB
A) or IC9003
(USB B) pin 1
Check 3.3V at D+A or
D+B signal at pin 98
(USB B) or pin 104
(USB A) of IC1001
Check 3.3V at pin
102 of IC1001
(SOC)
Change IC1001
(SOC)
1
Yes
No
Yes
5
No
Change:
R9012 (open)
R9013 (open)
R9014 (open)
SOC
R9015 (open)
Yes
6
No
Yes
7
End
2
Check 3.3V at
No
Pin 4 of
IC9002 (USB
A) or IC9003
(USB B)
3
Yes
Change
LB1007
(open)
32
y
4
Replace
IC1201
Replace IC9002
(USB A) or
IC9003 (USB B)