HCD-LX20I - Sony Audio Service Manual (repair manual). Page 4

NOTE  OF  REPLACING  THE  DRIVER  BOARD
When the DRIVER board is damaged, exchange the entire 
CDM80BT ASSY.

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 the power on.

2.  Press the [FUNCTION +] button to select CD function.
3.  While pressing the [ENTER] button, press the [

Z] button for 

more 5 seconds.

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

display and the disc slot is unlocked.

Note: When “LOCKED” is displayed on the liquid crystal display, the slot 

lock is not released by turning power on/off with the [

?/1] button. 

Note: Please take out the CD mechanism block from a set refer to DISASSEMBLY (from Page 7).

NOTE  OF  REPLACING  IC453  ON THE  PANEL  BOARD
IC453 on the PANEL board has been changed in the midway of production.
Sheet (RM) is not installed in former type.
Sheet (RM) is installed in new type.
When replacing IC453 on the PANEL board, refer to the table below.

  Ref. No. 

Part No. 

Description

  Ref. No. 

Part No. 

Description

  IC453 

6-600-684-01  IC   NJL22H400B

  IC453 

6-600-766-01  IC   PNA4823M01S0 

 68 

4-159-924-01 SHEET 

(RM)