Panasonic SA-MAX3500PU Service Manual page 26

7.5. No Sound in Tuner Mode
Press Power Button of Unit
or Remote Control to Turn
ON the Unit
Switch to Tuner (FM Mode)
Check if antenna is
connected properly
to Tuner jack.
Switch to AUX
mode. Check if
have sound
Check pin 11 of
IC52
3.3V -> OK
Check pin 1 of
CN51 on Tuner
PCB.
3.3V
Check status of
I2C lines
SCL/SDA.
R55/56 at tuner
pcb
1
No
antenna wire
connection
accessory
Yes
2
Yes
Tuner PCB
No
Sound
3
Change
NG
IC52 on
Tuner PCB
Ok
4
Change
NG
L54 on
Tuner PCB
OK
OK
5
Change
IC52 on
N
tuner PCB
OK
Change
Check Tun-Int
Change
L51 on
26
Check I2S
NG
lines status.
R51/52/60
OK
6
NG
pin 3 on
CN51. OK =
<0.3V
OK
7
NG
Check Tun_Rst
pin 9 on CN51.
OK=<0.3V
OK
NG
Check above
pins form SOC
IC output
End
Change
IC52 on
tuner PCB
Change
IC52 on
Tuner PCB
Change
IC52 on
Tuner PCB
Change
SOC IC
PCB