Zenith ZDX-313, Service Manual

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MECHANISM TROUBLESHOOTING GUIDE
4-26
Cassette cannot be inserted.
Does the Lever Assembly
Switch work? Is the Lever Assembly Switch
Spring damaged or omitted?
Does the CST IN Switch work
normally?
Replace or add the Lever
Assembly Switch Spring.
Is the Vcc of Main P.C.Board
5V?
YES
YES
Check syscon circuit.
YES
Check power circuit.
NO
Is the voltage between cassette
switch and GND on Main
P.C.Board 5V??
YES
Is there a short circuit between cassette
switch and GND on main P.C.Board?
Remove the short circuit part or
Replace the main P.C.Board.
NO
Check Mode switch location and
syscon circuit.
Replace CST IN Switch.
YES
NO
YES
NO NO
Replace CST IN Switch.
NO
NO
Cassette will not eject.
Does the L/D motor rotate in reverse?
Check L/D Motor or Drive IC.
Replace lever Assembly Switch.
Does the Lever Assembly Switch work?
YES
NO
NO
Does the F/L Arm Assembly work normally?
YES
NO
Does the Door Opener work?
YES
Replace F/L Arm Assembly .
Replace the Door Opener.
2. Front Loading Mechanism
A.
B.