Trouble Shooting; When Does Not Function; Turn The Power Off - Sharp MD-MT831H(GL) Service Manual

Table of Contents

It is advisable to use the TEST mode (refer to Error Data Display Mode, P14) indicating the causes of troubles before

starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful

for repair.

When 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.

Is the power supply turned on when the remote control

button or main unit

button is pressed?

Does the display operate normally?

Is playback state set?

Is audio output normal?

Is recording/playback operation normal?

• Power is not turned on when the

pressed.

Is power turned on when the remote control

pressed?

Is operation normal when the main body button is pressed?

Is the pin 55 of IC401 in H state?

Does the pin 66 of IC401 oscillate?