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ELECTRICAL TROUBLESHOOTING GUIDE -2/10
QQ
3 7 63 1515 0
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
TE
L 13942296513
YES
OK
1
Is oscillation of
X501 normal?
YES
Are IC501 Pins 193,
and 81 normal?
YES
A
www
.
http://www.xiaoyu163.com
YES
Do "Hello" appear at FLD?
NO
NO
Check the oscillation
NO
808
Check short.
OK
Replace IC501
or IC3F1.
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
POWER ON
NO
Is P3901
NO
connected normally?
Reconnect it.
Q Q
3
6 7
1 3
1 5
Refer to Front Part
Replace IC503
co
.
-59-
9 4
2 8
YES
Check power.
(Refer to power)
If power is
normal
0 5
8
2 9
9 4
2 8
YES
Is P3901 Pin 15, 16, 19 normal?
NO
A
The waveform
NO
NO
on 3, 5, 7 pin of IC503
normal?
YES
Replace Main B/D
m
9 9
9 9
1
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Troubleshooting
