CMT-LX10R, HCD-LX10R - Sony Audio Service Manual (repair manual). Page 3

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HCD-LX10R
3
SECTION  1
SERVICING  NOTES
NOTES  ON  HANDLING  THE OPTICAL  PICK-UP  
BLOCK  OR  BASE  UNIT
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)
 : LEAD  FREE  MARK
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.
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. 
LEAD  WIRE  SETTING
PT-AC board
power transformer
Except Mexican
model
Note:
 Bundle the lead wire so as not to 
 
touch the power transformer.
Please rotate the pully in the direction of the arrow 
after removing mechanism deck, and eject the disc. 
– CD mechanism block bottom view –
disc
CD mechanism block
HOW  TO  EJECT  THE  DISC  WHEN  POWER  SWITCH  TURNS  OFF
Note: Please take out the CD mechanism block from a set refer to DISASSEMBLY (from Page 5).
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