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No deiay out put,
Check IC13
1 hpm (A/DI on
oscilloscope.
YES
Chr kck (CIS
IS/H output}
1 -p
osc
n
on
Ho scope.
Check Q2.,
IC14, 1C15,
IC22 (S/H
OU! put)..
Check 1C22 33-pin
fCOUT input lerfTiitnal}.,
* T h e w «■j v e f n r rn q o e s
i h r -o u g h a c o ft's pa r a i o t
so it can be loaded
into IC22asOV-5V
digital data.
Check IC1 /
and IC22.
YES
Check SC22
63-pin {data
output terminal
for DRAM).
Check TP2
<0/A>on
oscilloscope..
NO
Check IC18
(DAC)(
and Id6.
YES
Check and
replace IC1 3.
NO
Oh*
!
1 !>■
a $c
;ck IC35
p i n o n
ilsoicope.
YES
Check JC33,
1C37, and
IC32.
Check and
replace IC35.
Can you
a wave form for
IC40 7-pin on
I he o
Can you observe
IC38 1-pin on
the osciHoscope?
Check 1C44,
5P IC46,
RM8,
Trouble in 1/2 IC38,
,1C38,, jacks,, or circuit
board pattern.
-22-
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