DHC-NXM4D, HCD-NXM4D - Sony Audio Service Manual (repair manual). Page 4

4

The laser diode in the optical pick-up block may suffer electrostatic
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 emission, 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 waveform is output several times.

tape mechanism deck

Jig (J-2501-271-A)

Jig (J-2501-270-A)

CN301

CN302

If CD/DVD mechanism deck is exchanged while the desk had gone into trays 2 or 3, since the address is memorized by the microprocessor,
the set will not operate normally.
In this case, please perform cold reset with reference to test mode (page 17.)

• Abbreviation

E2

: 120 V AC Area in E model

E3

: 240 V AC Area in E model

E15 : Iran model
EA

: Saudi Arabia model

SP

: Singapore model

MY : Malaysia model
AUS : Australian model
TH

: Thai model

MODEL

PART No.

SP, MY models

4-253-361-0[]

E2 model

4-253-361-1[]

E3, E15 model

4-253-361-2[]

EA model

4-253-361-3[]

AUS model

4-253-361-4[]

TH model

4-253-361-5[]

PART No.