Table of Contents
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Power Source Circuit
Check
POWER OFF
Is the voltage between 1-pin
and 2-pin of J1 approx.12V?
(2-pin is GND)
Yes
POWER ON
Is D2 cathode
approx.12V?
Yes
Is TP203(V CPU )
approx.5.15V?
Yes
Is TP202(V CC )
approx.5.1V?
Yes
Is TP200(V LCD )
approx.5V?
Yes
Is TP204(+10V)
approx.10V?
Yes
Go to Another
Function Check.
No
AC adaptor failure.
No
F1 failure.
No
Is D7 anode
approx.5.5V?
No
No
D8,D9,D10 failure.
No
Disconnect the LCD unit
No
Failure of IC7 or their
peripheral parts.
22
Yes
from CN100.
Yes
Is TP200(V
)
LCD
approx.5V?
No
LCD unit failure.
D7 failure.
Failure of IC1 or their
peripheral parts.
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Table of Contents
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