Trouble Shoot - Onkyo TX-SR444 Service Manual

1
No Sound (HDMI 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
(BAPRC-1758)
P2801B
1
● No.2 pin : +15V
(BAPRC-1758)
P2800B
2
●
No.7 pin : +3.3V
(BAAF-1712)
R6690
3
● : +21.5V
C
(BAAF-1712)
J4036, J4000
●
J4000 : +15V
4
● J4036 : -15V
(BAPRC-1758)
P8002A
5
●
No.11 pin : +3.2V
(BAPRC-1758)
P8002A
● No.2 pin : Check signal
6
● No.4 pin : Check signal
(BAAF-1712)
J4051
7
●
: Check signal
B
(BAAF-1712)
Q6050, Q6060
Check signal
8
●
Q6050(base) : Check signal
●
Q6060(base) : Check signal
9
A
1
2 3
Damaged PCB
No Good
BAVD-1735
OK
No Good
BAPRC-1758
OK
No Good
BAAF-1712
OK
No Good
BAAF-1712
OK
No Good
BAAF-1712
OK
No Good
BAPRC-1758
OK
No Good
BAAF-1712
OK
No Good
OK
BACLA-1734
BAAF-1712
2 3
4 5
BAVD-1735
BAPRC-1758
BACLA-1734
BAAF-1712
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%
4 5
6

Trouble Shoot

TX-SR343/444/HT-R494
TX-NR609
6
D
C
B
A