Sharp CD-K40X

In the interests of user-safetythe set should be restored to its original
condition and only parts identical to those specified be used.
Page
1. BASIC CONSTRUCTION 2, 3
2. RELATION OF THE MECHANICAL OPERATION OF THE MAIN GEAR AND THE TRAY
AND THE ELECTRIC CONTROL 4
3. TIMING CHART FOR TRAY MOVEMENT
5,6
4. TIMING CHART OF ELECTRIC SIGNALS FOR TRAY MOVEMENT 7
5. THE TURNTABLE MOVEMENT IS EXPLAINED AS FOLLOWS 8-10
6. SUPPLEMENT 11
Service Headquarters: Sharp Plaza,
Mahwah, New Jersey 07430-2135

Sharp CD-K40X Specifications

General

CD Player	Yes
Cassette Deck	Yes
Bluetooth	No
USB Port	No
Power Output	40W
Radio Tuner	FM
Speakers	2-way speakers

Summary

Basic Construction of CD Changer

Mechanical Operation: Main Gear, Tray, and Electric Control

Timing Chart for Tray Movement

Timing Chart for Electric Signals of Tray Movement

Turntable Movement Explanation

Microcomputer InputOutput for Turntable Control

Details microcomputer pins for turntable control, including photo-interrupter input and motor output signals.

Changer Mechanism Control Mode: Disc Table Position Detection

Explains how the disc table position is detected using a photo-interrupter and rotation pulses.

Turntable Position Memory and Rotation Output

Memory of Turntable Position by Rotation

Describes how turntable position is tracked by 120-degree rotations and memorized as disc addresses.

Microcomputer Output for ClockwiseCounterclockwise Rotation

Details microcomputer outputs for controlling turntable motor direction and speed.

Turntable Rotary Error Handling and STOP Control

Supplement: Disc Address Detection and Timing