Logic Circuit - DAEWOO ELECTRONICS DV-F882DY-C Service Manual

3-2. LOGIC CIRCUIT

A.
Digitron does
not operate.
Is +5V supplied to
pin of IC701?
8
Is -28V supplied to
pin of IC701?
11
Are -20 and -16.5V
supplied to pin and
of G701?
35
Are CLK signals
supplied to pin ), I
and i, of IC701?
Is 5V at pin of
IC701?
Check X701
Check IC701
and change.
NO
YES
YES
NO
1
YES
NO
NO
YES
NO
7
YES
NO
YES
NO
Is +5.8V supplied
from D713 cathod
NO
Is -28V at D650
anode primary power circuit.
YES
Check the connector
and pattern.
Check the power
module
Check IC601
Change
Change
18
check power circuit
Check D814 and