QT-CD250 (serv.man6). Including circuit diagrams - Sharp Audio Service Manual (repair manual). Page 11

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Set the function switch to "CD" when pressing the "REVIEW(PRESET DOWN )" button together with "STOP(TUNING DOWN)"
button.

Step-1. CD Pickup can be move when press the "CUE" button either "REVIEW" button.
"CUE" button : CD Pickup move to out side of disc.
"REVIEW" button : CD Pickup move to in side of disc.
                               (CD Pickup can't move any more, if reach to most in side.)
Note: If the CD Lid open (SW810 open), the unit can be operate Step-1 only and the unit can't operate from Step-2 to Step-5.

Step-2. The LASER light up when press the "PLAY/PAUSE" button.

Step-3. CD disc can be playing mode when press the "PLAY/PAUSE" button during the LASER ON.

The LCD displays indicate the "Track Number" and the "Playing Time".

Step-4. CD disc will be stop and the LASER goes out when pressing the "STOP" button, and return back to Step-1. (CD Pickup
position keeps at that point).

Step-5. It can be control to ON/OFF of the Tracking Servo when press the "MEMORY" button during the CD playing mode.
             (The Servo will be ON when playing mode again, if to make stop mode during the Servo OFF condition.)

The LCD displays indicate the playing time of CD Pickup point.
(The LCD displays indicate the playing time at that point when Pickup moving, if press the "CUE" button or press the "REVIEW"
button.)