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FL8400
At power on. "g" and some parts are not displayed.
0}
Are £12 ¥ lines normal?
Yes
Are £5 V lines normal?
Yes
Are -30 V lines normal?
Yes
Does 16 MHz clock
pulse appesr at
(C1G7 pind
Yes
Does 10 MHz clock
pulse appear at IC101 pin31.
Yes
At IC101 pin 72
is +5 V?
Yes
At IC101 pin 42-57
are waveform shown
in Figure 18?
Yas
DFLO is defective.
Dor check the circuit around it
cold soldering.
> Chack fuse F102
No
b Power trans is defective.
> D102, D103, D105, D106 are defective.
> Check CNT105.
D> Check CNT10B.
No
-
D1IC111, C112 are defecti
No
D Check CNT 108.
D Q1603 is defective.
b-0104 is defective.
No
> X-Tal 102 is defective
DIC107 is detective
No
DICID1 is defective.
DX-tai101 is defective.
No
DICIO1 is defective.
Dor. check the circuit around it.
No
DC 104 is defective.
Sv
-30V
Figure 16.
26
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