9
VSX-530-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
3. DIAGNOSIS
3.1 TROUBLESHOOTING
N
o Power
Other trouble.
Check D41, D103, T101, IC102 on
SMPS Assy or replace SMPS Assy.
AMP DC Protention works.
Disconnect speaker cables if you connect speakers.
(Prevention of Speaker destruction.)
Is Stand by?
(or O
N
→
Stand by)
Is the error indicated?
(HDMI LED flashing?)
Does DC Protection work
when power O
N
again?
Yes
This is just for general reference and does not including every single case.
Yes
Yes
N
o
N
o
Replace SMPS Assy.
N
o
Check +5.6
V
line on D-MAI
N
Assy
or replace D-MAI
N
Assy.
Cancel the DC detection. Refer to "6. [3] 3.4 How to
cancel the status after detection of the DC error".
Connect speakers, and check that sound output does
not have any problem.
N
o
Check IC301 on CPU Assy or
replace CPU Assy.
Replace CPU Assy.
N
o
Check cable connection between CX101 on SMPS Assy
and C
N
101 on D-MAI
N
Assy. If it is OK, replace that cable.
N
o
Check connection betwwern C
N
201 on D-MAI
N
Assy
and C
N
201 on CPU Assy.
N
o
N
o
Is the fuse (F100) open?
Is the v5.6
V
?
(SMPS Assy CX101
pins 5, 6, 7)(C129 +side)
Is the v5.6
V
?
(D-MAI
N
Assy
C
N
101 pins 1, 2, 3)
Yes
Yes
Is the v5.6
V
?
(D-MAI
N
Assy
C
N
201 pins 3, 4)
Yes
Is the v5.6
V
?
(CPU Assy
C
N
201 pins 30, 31)
Is the v3.3
V
?
(CPU Assy
IC301 pin 2)
Yes
Yes
Refer to "5.3 [1] Overload and DC Protection Circuit",
Diagnosis AMP5 Assy and MAI
N
Assy.
Yes
N
o
No Power
