Sony HCD-FL3, Руководство по обслуживанию, Страница: 4 / 170

4
HCD-FL3
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 flexible 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 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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
• RELEASING THE DISC TRAY LOCK
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.
Note:
When “LOCKED” is displayed, the tray lock is not released by
turning power on/off with the
[I/ ]
button.
SERVICE POSITION
In checking the DSP/MC board, prepare jig (extension cable J-
2501-208-A: 1.25 mm Pitch, 21 cores, Length 370 mm).
SECTION 1
SERVICING NOTES
• MODEL IDENTIFICATION
– Back Panel –
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
Ver 1.2