SCD-XA1200ES - Sony Audio Service Manual (repair manual). Page 3

3

The laser diode in the optical pick-up block may suffer electrostatic
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 flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.

•

Unleaded solder melts at a temperature about 40 ˚C higher

than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

•

Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)

than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

•

Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

In cleaning the lens of optical pick-up, use the air blower.
Never use a cotton swab for cleaning the lens of optical pick-up,
which otherwise causes a trouble.

Perform this setting when the EEPROM (IC702) on the MAIN board
is replaced.
Procedure:

1. While pressing the [MENU] button and  

.

 AMS 

>

  jog press

the [POWER] button to turn the power on and enter the test
mode and display “DIAG MODE”.

2.  

.

 AMS 

>

  jog is turned and “8D” is selected.

3.   

.

 AMS 

>

  jog is pressed and “INIT START” is displayed.

4. Then confirm “INITIAL OK” is displayed.
5. Press the [POWER] button to turn the power off.
6. Press the [POWER] button to turn the power on.
7. Press the [MENU] button.
8.  

.

 AMS 

>

  jog is turned and “M/2ch SEL” is selected.

9.  

.

 AMS 

>

  jog is pressed.

10.  

.

 AMS 

>

  jog is turned and “SEL – 2ch” is selected.

11.  

.

 AMS 

>

  jog is pressed.

12. Press the [POWER] button to turn the power off.

1

Rotate the cam (66)
with a screw driver
in the direction of arrow 

A

.

A

2

Pull out the tray 
in the direction of arrow B.

cam (66)