Aiwa HV-MC90 Service Manual page 81

MECHANISM TROUBLESHOOTING GUIDE
C.
AUTO STOP.
(PLAY/CUE/REV)
In Play/Cue/Rev is the pinch
roller in contact with the capstan
shaft.
YES
Are there T/up and supply reel
pulses.
YES
Check the Syscon, µ-COM.
D.
No cassette loading.
Insert the cassette.
YES
Does the lever S/W work
normally.
YES
Is there variation for F/L S/W
Output?
(In Tape with REC Tab
"L"→"H"→"L")
(In Tape without REC Tab
"L"→"H"→"L"→"H")
YES
Check Syscon Circuit.
Check aligment positions (page 71)
Check spring Pinch.
Is the output of DFG, DPG OK?
NO
YES
NO
Check Servo, Syscon.
Replace Reel Sensor.
NO
Check Cassette Carry Assembly.
NO
Does the F/L S/W work normally?
YES
NO
Check Syscon Circuit.
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NO
Replace Drum Motor.
NO
Replace F/L S/W.