CX-JV3, JAX-V3 - Sony Audio Service Manual (repair manual). Page 4

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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 oc-
cur 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.

The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.

Releasing Procedure :
While pressing the

x

key, press the

Z 

OPEN/CLOSE

key for 5

seconds. The message “UNLOCKED” is displayed and the tray is
unlocked.

When “LOCKED” is displayed, the tray lock is not released by
turning power on/off with the 

[POWER]

 key.

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 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 emis-
sion, observe from more than 30 cm away from the objective lens.

Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.

MODEL

PART No.

Singapore and Malaysia models

4-249-031-3

[]

Saudi Arabia model

4-249-129-3

[]

E model

4-249-130-3

[]

Thai model

4-249-174-1

[]

PART No.