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2. µ-COM Circuit
A. No Power
YES
Does Logo appear
on the screen?
YES
OK
1
Is oscillation of
X101 normal?
YES
Are IC107 Pin $, •
and ª normal?
YES
A
POWER ON
Power RED LED on?
Does Bar appear
Do all five Bars
appear?
NO
NO
NO
Check the oscillation
NO
Check short.
OK
Replace IC107
or IC108.
NO
YES
NO
at FLD?
NO
Is CON107
connected normally?
Reconnect it.
Refer to Front Part
Check short
Replace IC101.
49
Refer to Front Part.
YES
Check power.
(Refer to power)
If power is
normal
NO
Is CON107 Pin 6
normal?
YES
A
The
NO
waveform on A [00:21]
and D [00:15] of IC108
normal?
YES
NO
Are IC101
Pin 7, 8 normal?
YES
Replace Main B/D.
END
1
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