Aiwa XD-DV370 Service Manual page 74

ELECTRICAL TROUBLESHOOTING GUIDE -2/11
2. µ-COM Circuit
A. No Power
YES
Does Logo appear
on the screen?
YES
OK
1
Is oscillation of
X501 normal?
YES
Are IC503 Pins 14,
and 29 normal?
YES
A
Do all five Bars appear?
NO
NO
NO
Check the oscillation
NO
288
Check short.
OK
Replace IC501
or IC503.
POWER ON
Does Bar appear at FLD?
NO
Reconnect it.
Refer to Front Part
Check short
Replace IC506.
-74-
NO
Is P5901
connected normally?
NO
Is P5901 Pin 24 normal?
NO NO
waveform on A[00:21]
and D[00:15] of IC501
NO
Are IC506 Pins 7, 8 normal?
Replace Main B/D.
YES
Check power.
(Refer to power)
If power is
normal
YES
1
A
The
normal?
YES
YES