Diagnosis; Troubleshooting - Pioneer VSX-523-K Service Manual

1

5. DIAGNOSIS

5.1 TROUBLESHOOTING

A
No Power
This is just for general reference and does not including every single case.
No Power
Is Stand by?
(or ON → Stand by)
No
B
C
Is the fuse (F100) open?
No
Is the voltage +5.6 V?
(SMPS Assy CX101
pins 5, 6, 7)(C129 +side)
Yes
Is the voltage +5.6 V?
(D-MAIN Assy
CN101 pins 1, 2, 3)
D
Yes
Is the voltage +5.6 V?
(D-MAIN Assy
CN201 pins 3, 4)
Yes
Is the voltage +5.6 V?
(CPU Assy
CN201 pins 30, 31)
Yes
Is the voltage +3.3 V?
(CPU Assy
E
IC301 pin 2)
Yes
Replace CPU Assy.
F
16
1
2
Yes
Is the error indicated?
(HDMI LED flashing?)
Yes
AMP DC Protention works.
Disconnect speaker cables if you connect speakers.
(Prevention of Speaker destruction.)
Cancel the DC detection. Refer to "6. [3] 3.4 How to
cancel the status after detection of the DC error".
Does DC Protection work
when power ON again?
Yes
Refer to "5.3 [1] Overload and DC Protection Circuit",
Diagnosis AMP5 Assy and MAIN Assy.
Yes
Check D41, D103, T101, IC102 on
SMPS Assy or replace SMPS Assy.
No
Replace SMPS Assy.
No
Check cable connection between CX101 on SMPS Assy
and CN101 on D-MAIN Assy. If it is OK, replace that cable.
No
Check +5.6V line on D-MAIN Assy
or replace D-MAIN Assy.
No
Check connection betwwern CN201 on D-MAIN Assy
and CN201 on CPU Assy.
No
Check IC301 on CPU Assy or
replace CPU Assy.
VSX-523-K
2
3
No
Other trouble.
No
Connect speakers, and check that sound output does
not have any problem.
3
4
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