DAV-DZ30, HCD-DZ30 - Sony Audio Service Manual (repair manual). Page 4

The laser diode in the optical pick-up block may suffer electrostat-
ic break-down because of the potential difference generated by the 
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also 
use the procedure in the printed matter which is included in the 
repair parts.
The fl exible board is easily damaged and should be handled with 
care.

NOTES  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused 
on the disc refl ective surface by the objective lens in the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.

DISC  TRAY  LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Setting Procedure :
1.  Press the [

?/1

] button to turn the set on.

2.  Press the [FUNCTION] button to set DVD function.
3.  Insert a disc.
4.  Press the [

x

] button and the [

A

] button simultaneously for fi ve 

seconds.

5.  The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure :
1.  Press the [

x

] button and the [

A

] button simultaneously for fi ve 

seconds again.

2.  The message “UNLOCKED” is displayed and the tray is 

unlocked.

Note:  When “LOCKED” is displayed, the tray lock is not released by 

turning power on/off with the [

?/1

] button.

On cleaning discs, disc/lens cleaners
•   Do not use cleaning discs or disc/lens cleaners (including wet or 

spray types). These may cause the apparatus to malfunction.

IMPORTANT  NOTICE
Caution: This system is capable of holding a still video image or 
on-screen display image on your television screen indefi nitely. 
If you leave the still video image or on-screen display image 
displayed on your TV for an extended period of time you risk 
permanent damage to your television screen.
Projection televisions are especially susceptible to this.

Attention when transported
Use this mode when returning the set to the customer after repair.
Procedure:
1.   Press the [

?/1

] button to turn the set on.

2.   Press the [FUNCTION] button to set the function “DVD”.
3.   Remove all discs, and then press two buttons [

H

] and [

?/1

] 

simultaneously.

4.  After a message “MECHA LOCK” is displayed on the 

fl uorescent indicator tube, pull out the AC plug.

5.  To exit from this mode, press the [

?/1

] button to turn the set 

on.

Note about CDs/DVDs
The system can play CD-ROMs/CD-Rs/CD-RWs recorded in the 
following formats:
–   audio CD format
–   VIDEO CD format
–   MP3 audio tracks, JPEG image fi les, and DivX video fi les* 

of format conforming to ISO 9660 Level 1/Level 2, or its 
extended format, Joliet

The system can play DVD-ROMs/DVD+RWs/DVD-RWs/
DVD+Rs/DVD-Rs recorded in the following formats:
–   MP3 audio tracks, JPEG image fi les, and DivX video fi les* of 

format conforming to UDF (Universal Disc Format)

*   Except for United Kingdom model.

Example of discs that the system cannot play
The system cannot play the following discs:
•   CD-ROMs/CD-Rs/CD-RWs other than those recorded in the 

formats listed on “Note about CDs/DVDs”

•   CD-ROMs recorded in PHOTO CD format
•   Data part of CD-Extras
•   DVD Audios
•   Super Audio CD
•   DATA DVDs that do not contain MP3 audio tracks, JPEG 

image fi les, or DivX video fi les*

*   Except for United Kingdom model.
•   DVD-RAMs

Also, the system cannot play the following discs:
•   A DVD VIDEO with a different region code
•   A disc that has a non-standard shape (e.g., card, heart)
•   A disc with paper or stickers on it
•   A disc that has the adhesive of cellophane tape or a sticker still 

left on it

Notes about CD-R/CD-RW/DVD-R/DVD-RW/DVD+R/
DVD+RW
In some cases, CD-R/CD-RW/DVD-R/DVD-RW/DVD+R/DVD+RW 
cannot be played on this system due to the recording quality or 
physical condition of the disc, or the characteristics of the recording 
device and authoring software.
The disc will not play if it has not been correctly fi nalized. For 
more information, see the operating instructions for the recording 
device.
Note that some playback functions may not work with some 
DVD+RWs/DVD+Rs, even if they have been correctly fi nalized. 
In this case, view the disc by normal playback. Also some DATA 
CDs/DATA DVDs created in Packet Write format cannot be 
played.

Copyrights
This product incorporates copyright protection technology that is 
protected by U.S. patents and other intellectual property rights. 
Use of this copyright protection technology must be authorized by 
Macrovision, and is intended for home and other limited viewing 
uses only unless otherwise authorized by Macrovision. Reverse 
engineering or disassembly is prohibited.

This system incorporates with Dolby* Digital and Dolby Pro Logic 
(II)  adaptive matrix surround decoder and the DTS** Digital 
Surround System.
*   Manufactured under license from Dolby Laboratories.
 

“Dolby”, “Pro Logic”, and the double-D symbol are trademarks 
of Dolby Laboratories.

**  Manufactured under license from DTS, Inc.
 

“DTS” and “DTS Digital Surround” are registered trademarks 
of DTS, Inc.

LASER DIODE  AND  FOCUS  SEARCH
1.  Open the case and turn POWER on with no disc inserted.
2. Confi rm that the following operation is performed while 

observing the objecting lens from the clearance of DVD 
mechanism deck.
1)  Confi rm that laser beam is spread.
2)  Up and down motion of the objective lens. (2 times)