HCD-GV6, HCD-GV8, LBT-GV6, LBT-GV8 - Sony Audio Service Manual (repair manual). Page 4

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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.

HCD-GV6: Malaysia and

Singapore models

4-232-090-0

[]

HCD-GV6: Saudi Arabia model

4-232-090-1

[]

HCD-GV8: Malaysia and

Singapore models

4-232-090-2

[]

HCD-GV6: Indonesia model

4-232-090-6

[]

This unit is equipped with a self-diagnosis function.
The function is used for diagnosing the conditions of the circuits
of the VIDEO board.
The circuits can be determined if normal or abnormal by the light-
ing of D502 of the VIDEO board.

Lighting of D502
When lit

: Operates normally

Blinks repeatedly: The circuit may be faulty.

PART No.