3-3
Replace IC101.
Refer to Front Part
Check short
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X101 normal?
Are IC107 Pin
14
,
28
and
29
normal?
Do all five Bars appear?
Power RED LED on?
Does Bar appear at FLD?
Is CON107
connected normally?
Is CON107 Pin6 normal?
The
waveform on A[00:21]
and D[00:15] of IC108
normal?
Are IC101 Pin
7
,
8
normal?
Replace Main B/D.
Refer to Front Part.
Check the oscillation
Check short.
OK
Replace IC107
or IC108.
Check power.
(Refer to power)
If power is
normal
OK
POWER ON
1
1
YES
YES
YES
YES
YES
YES
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
A
w
w
w
.
r
t
v
-
h
o
r
v
a
t
-
d
j
.
h
r
