MEX-1HD (serv.man2) - Sony Car Audio Service Manual (repair manual). Page 5

5

The laser diode in the optical pick-up block may suffer electro-
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.

This set requires the work such as microcomputer software ver-
sion up, system ID setting and HDD formatting, if either of flash
memory, microcomputer (or mounted MAIN, SUB, or SERVO
board) and hard disk drive (HDD) was replaced.
Perform the work required by referring to the “Test mode”, if ei-
ther of the following parts was replaced.

Replacement

Version up

System ID setting

 parts

and HDD processing

Flash memory
(IC1030 on MAIN

a

a

board) *1

Microcomputer
(IC501 on SUB

a

–

board) *1

Flash memory
(IC9 on SERVO

a

–

board) *1

HDD

–

a

*2

*1: Including the case where the mounted board as a whole is re-

placed.

*2: Executing the HDD formatting causes the user’s recorded data

to be all erased, and therefore be careful not to execute this
operation by mistake if the HDD was not replaced.

Version up:

Refer to “Version Up After Microcomputer Software Related
Parts Replacement”.

System ID setting and HDD processing:

Refer to “Relating with ID”.