Sharp QT-CD210 User Manual

QT-CD210/C
– 1 –
Illustration: QT-CD210
CONTENTS
Page
IMPORTANT SERVICE NOTES (FOR QT-CD210 ONLY) ............................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
FITTING OF DIAL POINTER ............................................................................................................................................. 3
DISASSEMBLY.................................................................................................................................................................. 4
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 4
ADJUSTMENT ................................................................................................................................................................... 6
SCHEMATIC DIAGRAM .................................................................................................................................................... 8
WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 12
TYPES OF TRANSISTOR ............................................................................................................................................... 12
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 13
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 14
FUNCTION TABLE OF IC................................................................................................................................................ 18
PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (FOR QT-CD210 ONLY)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified should
be used.
QT-CD210(BL)
QT-CD210(S)
QT-CD210(WH)
QT-CD210C(S)
SERVICE MANUAL
SHARP CORPORATION
No. SY964QTCD210/
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

Sharp QT-CD210 Specifications

General

Radio Tuner	FM/AM
Display	LCD
Dimensions	300 x 230 x 120 mm
Weight	3.2 kg (without batteries)
Anti-Skip Protection	Yes
CD Compatibility	CD, CD-R, CD-RW
Audio Output	Headphone Jack
Power Source	Batteries
Playback Formats	CD-DA
Speaker System	Built-in stereo speakers

Summary

Important Service Notes

Before Returning the Audio Product (Fire & Shock Hazard)

Safety checks for fire and shock hazards before returning the unit.

Specifications

Compact Disc Player Specifications

Technical specifications for the CD player function.

Radio Specifications

Tape Recorder Specifications

Names of Parts

Disassembly

Caution on Disassembly

Important safety precautions to follow during disassembly.

Removing and Reinstalling Main Parts

CD Mechanism Section

Steps for removing and reinstalling the CD mechanism components.

How to Remove the Pickup

Detailed procedure for removing the CD pickup assembly.

Tape Mechanism Section

How to Remove Record/Playback and Erase Heads

Adjustment

Mechanism Section Adjustments

Torque Check

Head Azimuth Adjustment

Tape Speed Adjustment

Tape Section Adjustments

Bias Oscillation Adjustment

Playback Amplifier Sensitivity Check

Tuner Section Adjustments

FM IF/RF Adjustment

CD Section

Test Mode

Wiring of P.W.Board (1/2)

Wiring of P.W.Board (2/2)

Troubleshooting (CD Section)

When the CD Does Not Function

Steps to diagnose and fix CD non-operation issues.

How to Use CD Cleaner Disc

Troubleshooting (CD Section) - Laser Failure

Laser Failure Diagnostics

Diagnostic steps for laser failure in the CD section.

Focus Failure Diagnostics

Diagnostic steps for focus failure in the CD section.

Troubleshooting (CD Section) - Servo Failures

Focus Servo Sawtooth Wave Failure

Troubleshooting steps for focus servo sawtooth wave issues.

Spindle Motor CLV Servo Failure

Diagnostic steps for spindle motor CLV servo failure.

Troubleshooting (CD Section) - Motor and Search Failures

Track Search Failure

Diagnostic steps for track search failures.

Sled Motor Operation Failure

Troubleshooting steps for sled motor operation failures.

Sled Servo Failure

Diagnostic steps for sled servo failures.

Parts Guide

Explanation of Capacitors/Resistors Parts Codes