FLOW CHART NO.10 LOADING MOTOR AND
EJECTTROUBLESHOOTING
FLOW CHART
NO.1
1 SYSTEM CONTROL TROUBLESHOOTING
Thl?
cassette tape falls to came out.
I
No power is turned on.
I
NO
See FLOW CHART NO. 12.
when the EJECT button is pressed?
+
(
CAPSTAN
MOTOR
TROU
B
LE
1
YES
SHOOTING)
Does the take-up reel disk turn
when the capstan motor is
running?
1
YES
NO
Check reel disk and reel drive unit.
Are pulses applied at pin (85) of
No
1C701
when the take-up reel disk is
-
Check take-up reel sensor and all
turning?
the way up thru to
IC701.
YES
I
Isa
“H”
(about
1.7V)
Level
applied
NQ Check line between pin (95) of
at pin (6) of
IC704
when a reel
w
IC701
and all the way up thru to
pulse has been inputted? pin
(6)
of
IC704.
1
YES
Check
IC704.
the loading motor terminal?
Check between
IC704
and all the
way up thru to the
loadinq
motor.
NO
Dose the loading motor run?
Replace loading motor.
1
I
L
I
YES
Check
RX001
and
IC701,
and all
the way thru between them.
1
YES
I
I
k
+
IN0
Are
FIP
data pulses,
FIP
clock pulses and
FIP
control ready pulses applied to pins (24), (23) and
(22) of
IC5001,
respectively?
YES
pin (37) of
IC701
change from
“L”
Check
IC701.
to “H” level?
Do the bases of Q9908,Q9909, and
Check
QSSOS,
49909,
Q9915 and
49915
change from about
9.OV
to
all the way up thru to
IC701.
about 8.3V?
09908.09909 and 09915
NO
Check
Q9908,49909,
Q9915 and
the
ATl2V
line.
Q9902, Q9903 and
Q9904t
Check
Q9902,49903,
Q9904 and
the AT5.5V line.
I
1
YES
I
I
I
J
Replace cassette cam, gear, etc.
Check peripheral circuits for poor
solderino.
1
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