Denon D-AJ03 Service Manual download pdf (Page 12)

D-AJ03

TROUBLESHOOTING OF CD

CD SECTION

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 trouble shooting 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 off the power, and wipe the lens softly using a cleaning paper moistened with commercially available cleaning solution

so as not to damage it.

Be careful not to touch the lens with bare hands.

Dust gradually accumulates on the objective lens during use, and it may degrade performance. To avoid this problem, use

a cleaning disc designed for CD optical pickup lenses.

Does the unit switch from the CD test mode 1 to 2 ?

When the CD test mode is changed from 2 to 3, does the

disc motor rotate properly ?

Refer to "The disc motor CLV servo is defective".

Yes

When a disc is loaded, the power is turned on, and the CD (stop) button is pressed, is +7.2V applied to the collector of TR102 and +5.0V to

the emitter ? Is +3.3V applied to pin 22 on IC145 ?

Is the output at pin 19(HF) of IC146 flat in the CD test mode 4 ?

Refer to "HF is abnormal".

Is sound output when the pickup lens is moved to where a

track is located by pressing the

(button) and (button)

in the CD test mode 5 ?

Does the sled motor run ?

Yes

Are tracks played from the track 1 in ascending order by

pressing the

(button) ?

Yes

Refer to "The sled motor

does not run".

Refer to "No sound is heard".

Yes

When the unit is turned off and on again, is it initialized ?

Has the optical pickup

returned to the inner

periphery position ?

Yes

Is the optical pickup in

switch in the OFF state ?

The optical pickup in-switch

is defective (ON state).

Check the

microcomputer

PWB.

The optical

pickup in

switch is

defective.

OFF

Refer to "Track search is impossible".

Normal

Yes

Is the voltage applied as shown in the wiring diagram ?

Check the power circuit in the main unit.

Is the laser lit in the CD test mode 1 ?

Refer to "The laser does not light up".

Refer to "Out of focus".

http://www.xiaoyu163.com

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 52 53

Comments to this Manuals

No comments

Denon D-AJ03 Service Manual Page 12

Comments to this Manuals

Related products and manuals for CD players Denon D-AJ03