Denon MC2000 Service Manual page 38

FLOW CHART NO.11 (405-MC2-3058 : CONTROL UNIT)
JOG WHEEL is not operating.
(SCRATCH function is not operating.)
Is BEND function operating?
Is reference waveform outputted at 2pin, 6pin and 12pin of
IC405 and IC406?
(Refer to Fig.3 of the 39 page.)
When JOG WHEEL is touched, is wavelength of 2pin, 6pin
and 12pin changing of IC405 and IC406?
(Refer to Fig.4 of the 40 page.)
Is waveform inputed to 5pin of IC402 and 15pin of IC403?
(Refer to Fig.6 of the 40 page.)
When the top of JOG WHEEL is touched, is waveform inputed
to 31pin and 39pin of IC400 changed?
Replace IC400.
YES
YES
YES
YES
YES
NO
Refer to FLOW CHART NO.10 <JOG WHEEL is not
operating. (BEND function is not operating.)>.
Check the periphery circuit of IC405 and IC406 and replace it
NO
if defective.
When the periphery circuit is correct, replace IC405 and
IC406.
NO Check the periphery circuit of JOG WHEEL form IC405 and
IC406 and replace it if defective.
When the periphery circuit is correct, replace JOG WHEEL.
NO
Replace IC405 and IC406.
Check periphery circuit of IC400 from IC402 and IC403, and
NO
replace it if defective.
When the periphery circuit is correct, replace IC402 and
IC403.
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