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The capstan motor fails to run.
ls "H" pulse at pin @® of 1¢701
?
YES
IsPC5V atpin M of MCsocket ?
YES
Is2.5Vatpin
@ of MCsocket ?
YES
Is "H" pulse at pin © of MC
socket ?
Is the voltage at pin @ of MC
socket about 2.5V ?
YES
:
Is 12Vatpin @ of MCsocket?
YES
Replace the capstan motor.
NO
NO
NO
NO
NO
NO
Check IC701.
Check the PC5V line.
Check R713, R714 and all the way
up to the 2-5V line.
Check between the MC socket
and 1C701, and between the MC
socket and IC801.
Check
pins
<
and
of
Serer 2 -Oan:-@
Check the AT 12V line.
DRUM MOTOR TROUBLESHOOTING
The drum motor fails to run.
Ils "H" pulse atof pin @ of
1C701?
FLOW CHART NO. 9
Check
1€701.
Check between the MC socket
and !€701 and between the MC
Is "H" pulseatpin
© of ME
?
socket and iC801.
socket
Is AT12V atpin
@ of ME socket?
Check the AT 12V line.
Replace
the drum
motor.
The drum motor runs only for a few seconds.
Is drum PG signalatpin
@ of
[NO
ME socket 2
Check
the drum motor.
YES
Is drum PG signal at pin @ of
NO
Check between the ME socket
1C701 ?
and all the way up to pin @ of
YES
1€701, (1C702)
Is PG MM signal at pin © of
NO
Check IC701. Readjust R751 (PG
1€701 ?
MM control).
YES
Is H. SW. pulse at pin @) of Ic701 |. NO
Check 1¢701.
|
YES
Replace !C701.
—<
2
j<e)
fo)
m
4
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