SD-EX100H (serv.man6). Removing and reinstalling the main parts, wiring process diagram and explanation of CD mechanism - Sharp Audio Service Manual (repair manual). Page 4

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The mechanism is initialized and checked in the following cases.
1. The power is turned on for the first time after resetting the microcomputer.
2. The mechanism is not in the loading or ejecting completed state when the power is turned on.

Initializing the mechanism

Start

End

Mechanism up

 switch

OK?

Close

Open

The tray moves downward until 
the close switch is turned on.

The CD mechanism moves 
downward until the switch is 
turned on.

The CD mechanism moves 
downward until the switch is 
turned on.

The tray moves upward until 
the open switch is turned on.

The tray moves downward until 
the close switch is turned on.

OK

OK?

OK?

OK

OK

OK?

OK

OK?

OK

NG

Er-CD TA?O0

NG

Er-CD TA?D0

NG

Er-CD TA?C0

The open switch
is checked.

The up/down 
motor and the 
down switch are
checked.

NG

Er-CD TA?D0

The up/down 
motor and the 
down switch are
checked.

The tray motor 
and the close 
switch are 
checked.

NG

Er-CD TA?C0

The tray motor 
and the close 
switch are 
checked.