VSX-45TX
119
5
6
7
8
5
6
7
8
C
D
F
A
B
E
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
Step 3
Step 2
CN101
CN601
Is
FFC inserted
tight ?
Insert it tight
Is
FFC inserted
tight ?
No
Insert it tight
No
Yes
CN102
Is
connector
inserted
tight ?
IC201
Confirm
the poor contact
of lead wire of
CN101-pin 16.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
Coax1 (pin 44)
No
Yes
Confirm
the poor contact
of lead wire of
CN101-pin 14.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
Coax2 (pin 46)
No
Yes
Confirm
the poor contact
of lead wire of
CN101-pin 12.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
Opt in1 (pin 48)
No
Yes
Confirm
the poor contact
of lead wire of
CN101-pin 10.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
Opt in2 (pin 1)
No
Yes
Confirm
the poor contact
of lead wire of
CN101-pin 8.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
RF Demodulator (pin 3)
No
Yes
Confirm
the poor contact
of lead wire of
CN101-pin 6.
Check the COXIAL IN Assy
or OPTICAL IN Assy and
so on.
USB (pin 5)
No
Yes
Insert it tight
No
Yes
IC901
Is
there the input
of 5V ?
Check CN102
Is 3.3V
outputting it ?
No
Replace IC901
No
Yes
IC902
Is 1.8V
outputting it ?
Replace IC902
No
Yes
Is SPDIF signal coming ?
(be different with Function)
A
Yes
End
Yes
End
