Will Not Write - Tandon TM-100-1 Operating And Service Manual

SECTION
4.1
4.2
4.3
CONDITION
Not ready
and/or
no index.
Will not seek
or restore .
Will not write.
POSSIBLE CAUSE
Diskette not inserted.
Door not closed.
Unit not selected.
Drive motor not turning.
Index sensor not
connected .
Index sensor defective.
Interface not enabled.
Step motor
disconnected .
Defective step logic,
Defective step motor.
Interface not enabled.
Heads or write protect
switch not connected.
Write protect switch
misadjusted.
Defective write logic.
Defective heads.
4-2
RECOMMENDED ACTION
Insert diskette.
Close door.
Verify unit select and jumper
configuration.
Verify interface drive motor on.
Check Connectors P13, P20,
and P21.
Verify drive belt installed.
Replace Servo PCBA.
Replace Drive Motor Assembly.
CheckP10.
Replace index sensor.
Verify interface direction , step,
and select signals.
Check Connector P12.
Replace Logic PCBA.
Replace Module Assembly.
Verify write enable, select, and
write data interface lines.
Check Connectors P5, P6,
and P8.
Check write protect
switch operation.
Replace Logic PCBA.
Replace Module Assembly.