Marantz VC5200 Service Manual page 18

2. µ-COM Circuit
A. No Power
YES
Do "DV 50" Bars appear?
Does Logo appear
on the screen?
YES
OK
1
Is oscillation of
X501 normal?
YES
Are IC501 Pins 193, 808
and 81 normal?
YES
A
All manuals and user guides at all-guides.com
POWER ON
YES
Do "Hello" appear at FLD?
NO
Reconnect it.
NO
NO
Check the oscillation
NO
Check short.
OK
Replace IC501
or IC306.
NO
Is P3901
NO
connected normally?
YES
Refer to Front Part
NO NO
Replace IC502
16
YES
Check power.
(Refer to power)
If power is
normal
Is P3901 Pin 8, 9, 18 normal?
NO
1
A
The waveform
on 3, 5, 7 pin of IC502
normal?
YES
Replace Main B/D