Front Loading Mechanism - Zenith D35 Service Manual

MECHANISM TROUBLESHOOTING GUIDE

2. Front Loading Mechanism

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