Diagnosis; Troubleshooting - Pioneer VSX-1128-K Service Manual

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5. DIAGNOSIS

5.1 TROUBLESHOOTING

A No Power
This is just for general reference and does not including every single case.
No power
Stand by (or ON -> Stand by)
?
No
B
Fuse F100 is open?
No
Is the voltage 5.6 V CX101
pins 5, 6, 7 (C129 + side) on
the SMPS Assy?
Yes
Is the voltage 5.6 V CN9501
pins 5, 6, 7 on the D-MAIN Assy?
Yes
Is the voltage 5.6 V CN601
pins 1, 2 on the D-MAIN Assy?
C
Yes
Is the voltage 5.6 V CN301
pins 1, 2 on the CPU Assy?
Yes
Is the voltage 5.6 V C353 on
the CPU Assy?
Yes
Check Reset IC (IC302)
on the CPU Assy.
OK
Replace the D-MAIN Assy.
D
E
F
24
1
2
Yes
Is an Error indicated?
Yes
Refer to
"5.2 ERROR INDICATIONS".
Yes
Check D41, T101, IC102 on SMPS Assy
or replace the SMPS Assy.
No
Replace the SMPS Assy.
Check the cable between CX101 on the
No
SMPS Assy and CN9501 on the D-MAIN Assy.
If it is OK, replace that cable.
No
Check +5.6V line on the D-MAIN Assy
or replace the D-MAIN Assy.
No
Replace the FFC between the D-MAIN Assy
and the CPU Assy.
No
Replace D301, D302 or
replace the CPU Assy.
NG
Replace IC302 or
replace the CPU Assy.
5 V
4.4 V
4.2 V
Pin 2
VDD
5 V
Pin 1
Vout
2
3
No
Other trouble
3 ms
>1 ms
VSX-1128-K
3
4
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