Trouble Shooting - Pioneer VSX-56TXi Service Manual

5

7.1.3 TROUBLE SHOOTING

• When a sound is not out in the surround mode with the digital signal input.
• Suppose CR to be poor contact and that is not damaged.
• This shows failure analysis of DSP Assy.
Step 1
CN101
Is
FFC inserted
tight ?
Yes
CN601
Is
FFC inserted
tight ?
Yes
CN102
Is
connector
inserted
tight ?
Yes
End
Step 2
IC901
Is
there the input
of 5V ?
Yes
Is 3.3V
outputting it ?
Yes
IC902
Is 1.8V
outputting it ?
Yes
End
5
6
No
Insert it tight
No
Insert it tight
No
Insert it tight
No
Check CN102
No
Replace IC901
No
Replace IC902
6
7
Step 3
IC201
Is SPDIF signal coming ?
(be different with Function)
Coax1 (pin 44)
Confirm
the poor contact
of lead wire of
CN101-pin 16.
Yes
Coax2 (pin 46)
Confirm
the poor contact
of lead wire of
CN101-pin 14.
Yes
Opt in1 (pin 48)
Confirm
the poor contact
of lead wire of
CN101-pin 12.
Yes
Opt in2 (pin 1)
Confirm
the poor contact
of lead wire of
CN101-pin 10.
Yes
RF Demodulator (pin 3)
Confirm
the poor contact
of lead wire of
CN101-pin 8.
Yes
USB (pin 5)
Confirm
the poor contact
of lead wire of
CN101-pin 6.
Yes
A
VSX-56TXi
7
8
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
Check the COXIAL IN Assy
No
or OPTICAL IN Assy and
so on.
8
A
B
C
D
E
F
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