Troubleshooting (Cd Section) - Sharp CMS-R600X(BK) Service Manual

Service manual (5 pages)

Table of Contents

CMS-R600X/R600XT

When the CD does not function

When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean

the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check

the following items.

Remove the cabinet and follow the troubleshooting instructions.

"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.

Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."

Turn the power off.

Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.

Do not touch the lens with the bare hand.

• When the turntable fails to stop.

Is from5 V till 0V down pulse (approx. 300 ms) input into the

IC701 pin 43 when the turntable is rotating?

Is there following voltage input on the IC701 pin 45 in the

specific state?

When the CD mechanism is moved up: 0V

In other states: 5V

Check IC2 pins 26, 27 and 28, Q52 and IC52 and the periphery.

IC701 defective.

• When turntable fails to move.

Is there following voltage input on the IC701 pin 45 in the

specific state?

When the CD mechanism is moved up: 0V

In other states: 5V

Is L output from the IC2 pin 27?

Is L output from the IC2 pin 26 during SEC when the disc skip

switch is pressed?

Is 4V output from the CNP80 pin 6 during operation stated

above?

Check turntable motor and turntable mechanism.