Daewoo DV-F562 Series, Service Manual

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20
Digitron is lit but keys do
not operate.
Is each key pulse
applied to pin ,
and of IC701?
2 3
12 13
Check key matrix
circuit.
Check the pin serial of
pin , , , of IC701.
24
Power compensation
does not operated.
When mains is
unplugged is 3.6V at
pin and of IC601?
26 81
Is signal applied to
pin and of IC601?
42 43
Check IC601.
Check C623.
Check x602.
NO
YES
YES
YES
YES
NO
NO
B.
C.
YES
23 22 21
B.
C.
3-2. LOGIC CIRCUIT
19
Digitron does
not operate.
Is+5V supplied to
pin of IC701?
8
Is-24 V 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
Change IC701
Check M801
Is+6V supplied
from D713 cathod
Change IC701
Change X701
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
A.
YES
Check M801
NO
Check M801
NO
Check IC601
NO