Aiwa HV-FX4100k Service Manual page 27

AUDIO SHAKES
Is AUDIO HEAD scratched ?
No
Is input level at pin 85 of
IC1002 about 0.4Vp-p ?
Yes
In playback, is the voltage
at pin 4 of CP1003 2.6V ?
Yes
Check AUDIO BLOCK.
TROUBLESHOOTING GUIDE
Yes
No
No
E-4
Replace AUDIO HEAD.
Replace CAPSTAN DD UNIT.
Check IC1002.