Onkyo HT-R495 Service Manual page 21

1
No Sound (Analog in)
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
D
Process Check Point
J4251(BAAF-2690)
1
J4251 ca. +24V
J4187, J4188 (BAAF-2690)
2
J4187 ca. -15V
P7002 (BAPRC-2695)
3
12 ca. +3V (SPRLF)
C
J4101 (BAAF-2690)
4
J4101 Audio Signal (FL OUT, CLA IN)
Q6001, Q6021 (BAAF-2690)
5
Base Audio Signal (FL OUT, CLA OUT)
6
B
A
1
2
No Good
Damaged PCB
OK
BAAF-2690
BAAF-2690
J4188 ca. +15V
BAAF-2690
BAAF-2690
BACLA-2673
BAAF-2690
2
3 4
BAPRC-2695
BAPS-2674
3 4
5
Trouble Shoot
BACLA-2673
BAAF-2690
TX-SR292BT/SR393/SR494, HT-R398/R495
5
6
D
P7001
C
BADIS-2672
B
A
6