DHC-FL3, HCD-FL3 - Sony Audio Service Manual (repair manual). Page 4

4

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.

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

Releasing Procedure :
Press two buttons of

Z

(CD) and 

[GROOVE]

 simultaneously for

five 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 

[I/   ]

 button.

In checking the DSP/MC board, prepare jig (extension cable J-
2501-208-A: 1.25 mm Pitch, 21 cores, Length 370 mm).

MODEL

PART No.

Singapore model

4-239-008-0

[]

120 V AC area in E model

4-239-008-2

[]

Mexican model

4-239-008-3

[]

Chilean and Peruvian models

4-239-008-4

[]

Argentina model

4-239-008-5

[]

Australian model

4-239-008-6

[]

PART No.

Connect jig (extension cable J-2501-208-A)
to the MC board (CN106) and BD board (CN101). 

MC board (CN106)

MC board

DSP board

Any board to put

BD board (CN101)

1