51
37VT-26H(GY)
NO
YES
NO
FLOWCHART NO. 1-4
FLOWCHART NO. 1-5
LOADING MOTOR AND EJECT TROUBLESHOOTING
A cassette tape fails to eject.
Does the capstan motor start when
the EJECT button is pressed ?
Check the reel disk and reel drive unit.
See FLOWCART NO. 1-6
NO
Is about 11V at pin (10) of IC7701 ?
Check IC7701 and "L" level of pin (5)
of it.
SYSTEM CONTROL TROUBLESHOOTING
No power.
Does the take-up reel disk turn when
the capstan motor is running ?
YES
NO
Check the take up reel sensor and all
the way to IC2001.
YES
NO
Check between pin (6) of IC7701 and
all the way up to pin (20) of IC2001.
Is reel pluse at pin (80) of IC2001
when the take-up reel disk is turning ?
YES
NO
Is the correct voltage at the loading
motor terminal ?
Check between IC7701 and all the
way up to the loading motor.
YES
NO
Does the loading motor run ?
Replace the cassette cam, gear, etc.
Replace the loading motor.
YES
YES
Is "H" level (about 1.8V) at pin (6) of
IC7701 when reel pulse is inputted ?
Check peripheral circuit for poor
soldering and wire harness to
mechanism or the sensor input to
IC2001 from mechanism.
Check IC2001.
Check Q782 and Q785(AT5V GEN.).
NO
NO
Is the PC 5V line normal ?
YES
YES
Does power control (H) signal at pin
(31) of IC2001 change from "L" to "H"
level when power key is pressed ?