TAKE-UP REEL PULSE GENERATOR TROUBLESHOOTING
FLOW CHART NO.
l-8
DRUM MOTOR TROUBLESHOOTING
FLOW CHART NO.
l-10
I
No reel sensor pulse appears.
I
I
The drum motor fails to run.
I
Is there the reel sensor
-
pulse at pin (13) of the
connector EA ?
-,YES
-i:rzpCh..,l,i.yi;;l[
NO
Is there the reel sensor
pulse at pin (3) of the
YES
-
Check the harness
EA-
_
MF.
connector
MF
?
NO
Is
”
H’
pulseatof
pin(l
NO
IC7701(8Al5218F)
7
t
Check
IC7701.
L
Is
-
H
l
voltage at pin
(6)
of ME
socket
7
YES
NO
Check between the MC socket
t
and
IC7701
and between the MC
socket and \C880
1.
Is
UR12V
atpin(3)of
MEsocket?
No
.
Check the
UR12V
line.
Replace the drum motor.
*
Replace the reel sensor
(located in the reel
sensor
PWB,
F2977GE).
I
The drum motor runs only for a few seconds.
I
HEAD SWITCHING PULSE
TROUBLESHOOTlNG
FLOW CHART NO.
l-9
I
No head switching pulse.
I
DFG
w
““’
Is
the&-NO
~
rotating ?
See FLOW CHART NO.
l-
10.
D-PG
-yr--~“t~~~;p
L
,
YES
t
Are the drum
PG
and
drum
FG
signal inputted
to pins
(48)
and
(47)
of
YES
~
IC8801, respectively ?
pulse.
,
NO
I
tag
,
4
Is drum
PG
signal at pin
(1)
of
NO
ME socket 7
b
Check the drum motor.
1
YES
,
Is drum PC signal at pin
(48)
of
IC8801?
NO
Check between the ME socket
t
and pin
(48)
of
IC8801.
IS
H.
SW.
pulse at pin
(22)
of
Iceeot?
YES
NO
Check
IC8801.
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