3-2. LOGIC CIRCUIT
15
Digitron does
not operate.
Is+5V supplied to
pin of IC701?
8
Is-24V supplied to
pin of IC701?
11
Are -20 and -16.5V
supplied to pin and
of G701?
1
35
Are CLK signals
supplied to pin ,
and of IC701?
1
2
3
Is 5V at pin of
IC701?
7
Check X701.
Check IC701
and change.
Check the
Fuse of F802.
Is+5V supplied to
CATHOD of D712?
Is-28V at D614
anode?
Check D814 and
primary power circuit.
Change D614.
Check the Trans output
and D605.
Check IC601.
Change IC702.
Change X701.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
YES
A.
YES
Check the connector
and pattern.
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