Sharp VT-3428X Service Manual page 48

DRUM MOTOR TROUBLESHOOTING
I
The drum motor fails to run,
Is the voltoge more than about
NO
I I
t
Is the volta e more than about
NO
at pin (1) of ME
connector ?
I
S
YES
I 1
I
Check/replace the drum motor.
I
I
The drum motor runsonly for a few seconds.
I
NO
Is drum PC signal at pin (5) of
ME connector 7
Is drum PC signal at pin (66) of
NO
t
,
I
Check pin (62) of IC8801.
I
FLOW CHART NO. 1-9
I
Check IC7701 and all the way up
to pin (4) of IC8801.
I I
Check between the ME connector
and IC770 1, and between the ME
socket and pin (62) of IC8801.
Check the ATl2V line.
FLOW CHART NO. l-10
I
Check the drum motor.
Check between the ME connector
Check or replace IC8801.