Sharp VC-H92HM Serviceanleitung Seite 57

9S
FLOW CHART NO.14 DRUM MOTOR TROUBLESHOOTING (2)
The drum motor runs only for a few seconds.
Is drum PG signal given out of pin Check drum motor.
(1) of ME connector?
YES
A - : Check between ME connector and
Is drum PG signal given out of pin all the way up thru to pin (48) of
(48) of 1C701? 1C701.
YES
Is H.SW. pulse given out of pin (22) Check 1C701.
of 1C701?
YES
Replace !C701.
FLOW CHART NO.15 HEAD SWITCHING PULSE TROUBLESHOOTING
No head switching pulse.
; NO
ls the drum motor rotating?
YES
Is the drum PG signal and drum FG jno
signal present on pins (48) and (47)
See FLOW CHART NO. 13, 14.
(DRUM MOTOR
TROUBLESHOOTING (1), (2))
of IC701, respectively?
About 0.5Vp-p
Are the drum PG and drum FG YES ;
signals present on pins (1) and (4) oon hal between AD plug
of AD connector?
:
NO
ey ac av AV
Check drum motor and the
between AD to ME harness. BPS AEP
About 0.5Vp-p
Replace 1C701.