TROUBLESHOOTING GUIDE
E-12
CYLINDER NOT ROTATING
DURING PLAYBACK AND
RECORDING
Yes
No
Yes
No
Is the voltage at pin 8 of
CP1001 about DC12V ?
Check MOTER +12V line and
POWER BLOCK.
In playback, is the
voltage at pin 12 of
CP1001 about DC3.6V ?
Check IC1001.
Replace CYLINDER UNIT.
Is AUDIO HEAD scratched ?
No
Yes
AUDIO SHAKES
Replace AUDIO HEAD.
Does pin 87 of IC1001
output a 3.3Vp-p square
wave ?
No
Replace CAPSTAN DD MOTOR.
Yes
Yes
In playback, is the
voltage at pin 5 of CP101
about DC3.6V ?
Replace IC1001.
Check AUDIO BLOCK.
No
