TROUBLESHOOTING GUIDE
AUDIO SHAKES
Is AUDIO HEAD scratched ?
Check AUDIO BLOCK.
Replace AUDIO HEAD.
Replace CAPSTAN DD MOTOR.
Check peripheral components
of IC1001.
Replace IC1001.
No
Yes
Yes
No
No
Yes
No
No
Yes
Yes
Does pin 90 of IC1001
output a 3.0Vp-p square
wave ?
In playback, is the voltage at pin 4
of CP1004 2.8V ? Is the voltage at
pin 4 of CP1004 3.3V when you
stop the CAPSTAN DD MOTOR
manually ?
In playback, is the voltage
at pin 3 of CP1004 about
DC1.8V ?
In playback, is the voltage at
pin 12 of IC1001 DC2.2V ?
E-19
