13VT-K100/150
13VT-CK10
43
NO
NO
NO
NO
Check pin (12) of IC7701 and all
the way up to pin (5) of IC7702.
NO
NO
CASSETTE CONTROL TROUBLESHOOTING FLOW CHART NO.1-3
A cassette tape is not taken in.
YES
YES
YES
YES
YES
YES
Fix or replace the cassette
housing.
Check the start sensor cover.
Check the start sensor and the
way up to pin (2) of IC7701.
NO
NO
NO
YES
YES
YES
Check IC7702 and AT12V line.
Check between IC7702 and the
loading motor.
A cassette tape is taken in, but ejected at once.
Replace IC7701
Is the cassette housing distored?
Does the start sensor cover
beceme open when the cassette
tape is inserted?
Does the start sensor pin (2) of
IC7701 go to "L" level when the
cassette tape is inserted?
Does pin (5) of IC7702 (BA6209)
go to "H" level (about 1.8V) when
the cassette tape is inserted?
Check and replace the loading
motor.
Is the correct voltage at the
loading motor terminal when the
cassette tape is inserted?
Does pin (2) of IC7702 go to
about11V when the cassette
tape is inserted?
Do the cam switches A and B
operate normally when the
cassette tape is loaded?
Does end sensor pulse at pin (3)
of IC7701 change from "L" to "H"
level when the cassette tape is
loaded?
Does start sensor pulse at pin (2)
of IC7701 change from "L" to "H"
level when the cassette tape is
loaded?
Check the start sensor and all
the way up to IC7701.
Check the end sensor and all the
way up to IC7701.
Check cam switches and all the
way up to IC7701.
FLOW CHART NO.1-4
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
See FLOW CHART NO.1-6.
Replace the loading motor.
Check the reel disk and reel
drive unit.
Check the take up reel sensor
and all the way to IC7701.
Check between pin (6) of IC7702
and all the way up to pin (11) of
IC7701.
Check IC7702 and "L" level of
pin (5) of it.
Check between IC7702 and all
the way up to the loading motor.
LOADING MOTOR AND EJECT TROUBLESHOOTING
A cassette tape fails to eject.
Does the capstan motor start
when the EJECT button is
pressed?
Does the take-up reel disk turn
when the capstan motor is
running?
Is reel pluse at pin (80) of
IC7701 when the take-up reel
disk is turning?
Is "H" level (about 1.8V) at pin
(6) of IC7702 when reel pulse is
inputted?
Is about 11V at pin (10) of IC7702?
Is the correct voltage at the
loading motor terminal?
Does the loading motor run?
Replace the cassette cam, gear,
etc.
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