HCD-SLK10D, HCD-SLK20D, WHG-SLK10D, WHG-SLK20D - Sony Audio Service Manual (repair manual). Page 4

The laser diode in the optical pick-up block may suffer electro-
static 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.

UNLEADED  SOLDER
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 viscous (sticky, less prone to fl ow) 
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.

RELEASING  THE  DISC  SLOT  LOCK
The disc slot lock function for the antitheft of an demonstration 
disc in the store is equipped.

Releasing Procedure:
1.  Press the [

?/1

] button to turn on the system.

2.  Touch the [HOME] sensor.
3.  Touch the [

M

], [

m

], [

<

] and [

,

] sensors to select the “CD/

DVD”, and touch the [ENTER] sensor.

4.  Touch the [

x

] sensor and press the [

Z

] button simultaneously, 

and hold for more than fi ve seconds.

5.  The message “UNLOCKED” is displayed on the liquid crystal 

display module and the disc slot is unlocked.

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

turning power on/off with the [?/1] button.

NOTE  THE  IC102  AND  IC103  ON  THE  DMB19  BOARD  
REPLACING
IC102 and IC103 on the DMB19 board cannot exchange with 
single. When these parts are damaged, exchange the complete 
mounted board.

NOTE  THE  CN406  ON  THE  DISPLAY  BOARD  RE-
PLACING
CN406 on the DISPLAY board cannot exchange with single. 
When this part is damaged, exchange the complete mounted board.

NOTE  FOR  REPLACEMENT  OF  THE  MS-214  BOARD
When the MS-214 board is defective, exchange the entire CDM86 
(S) ASSY.

NOTE  FOR  REPLACEMENT  OF  THE  TOUCH  PANEL  
BOARD
When the TOUCH PANEL board is defective, exchange the entire 
mounted board.

HCD-SLK20D: 120V AC area in E, 
Chilean and Peruvian models

4-281-621-0[]

HCD-SLK20D: Mexican model

4-281-622-0[]

HCD-SLK20D: Indian model

4-281-624-0[]

HCD-SLK10D: Brazilian model

4-281-626-0[]

HCD-SLK10D: Singapore model

4-281-627-0[]

HCD-SLK10D: Thai model

4-281-628-0[]

HCD-SLK10D: Chinese model

4-281-629-0[]

HCD-SLK20D: Saudi Arabia model

4-289-306-0[]

CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING
When checking the board, the electrical discharge is necessary for 
the electric shock prevention.
Connect the resistors referring to the fi gure below.

•  Switching regulator (C201, C202)
 

Both ends of respective capacitors.

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