Pioneer VSX-45TX Service Manual page 120

1
A
A
Front Opt in (pin 42)
Confirm
the poor contact
of lead wire of
CN102-pin 18.
Yes
MCK (pin 23)
B
Is outputting it ?
Yes
C
LRCK (pin 24)
Is outputting it ?
Yes
SDTO (pin 25)
Is outputting it ?
D
Yes
BCK (pin 26)
Is outputting it ?
Yes
End
E
F
120
1
2
No
Check the DSP CONNECTION Assy
or REGULATOR Assy and so on.
Pin 31
No No
Is input signal
H ?
Yes
Pin 10
No
Replace IC401
Is input signal
L ?
Yes
Pin 29
No
Replace IC201 or X201
Is oscillating it
?
No
Replace IC201
No
Replace IC201
No
Replace IC201
2
3
Confirm
the poor contact No
Check the DSP CONNECTION Assy
of lead wire of
or REGULATOR Assy.
CN102-pin 21.
Step 4
IC701
pin 1
Is input signal L
?
pins 2-4
Same signal
waveform
?
pins 5-7
Same signal
waveform
?
pins 11-9
Same signal
waveform
?
pins 14-12
Same signal
waveform
?
End
VSX-45TX
3
4
No
Check IC401 (Go to Step 7)
Yes
No
Replace IC701
Yes
No
Replace IC701
Yes
No
Replace IC701
Yes
No
Replace IC701
Yes
4