Sharp 27DV-S100 Service Manual page 63

Drum motor failure to stop.
NO
Is about 0.6V applied at pin Is about 0V applied at
(2) of IC7006? pin (47) of IC2001?
YES
Replace the drum Check R7059 and
motor. R7002.
Capstan motor failure to
start.
NO
Check the CAP5V line
Is 5V applied at pin (8) of
(around Q9103) and
connector AC?
replace as required.
YES
NO
Is 23V applied at pin (5) of
Check the PC23V line.
connector AC?
YES
Are there the PWM
NO
Is about 2.6V applied at pin
output signals at pins
(4) of connector AC?
(31) and (33) of IC2001?
YES
Check the line between
pins (31)/(33) of IC2001
and pin (4) of connector
AC
NO
Is about 2.7V applied at pin
Is 5V applied at pin (92)
(3) of connector AC?
of IC2001?
YES
Check the connection
Check R7032, R7034,
between connectors AC
R7035, R7036, R7037
and MC. Replace the and C7030.
capstan motor.
FLOW CHART No. 2-7
NO
Check IC2001 and
replace as required.
YES
FLOW CHART No. 2-8
NO
Check IC2001 and
replace as required.
YES
NO
Check IC2001 and
replace as required.
YES
Capstan motor failure to
stop.
NO
Is 0V applied at pin (4) of Is 0V applied at pin (29)
of IC2001?
connector AC?
YES
Replace the capstan Check R7054 and
motor. replace as required.
No H.SW.P. output signal.
NO Go to Flowchart No. 6
Is the drum motor running? "Drum motor failure to
start".
YES
Check the drum PG
NO
Is there the drum PG signal
signal line between pin
at pin (66) of IC2001?
(7) of IC7006 and pin
(66) of IC2001.
YES
Check the drum FG
NO
Is there the drum FG signal signal line between pin
at pin (65) of IC2001? (8) of IC7006 and pin
(65) of IC2001.
YES
NO
Is there the H.SW.P. signal Check IC2001 and
at pin (23) of IC2001? replace as required.
YES
Check the H.SW.P. signal
line.
FLOW CHART No. 2-9
NO
Check IC2001 and
replace as required.
YES
FLOW CHART No. 2-10