Servicing Notes - Sony HCD-GN100D Service Manual

HCD-GN90D/GN100D
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NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
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.
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 emission, 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 waveform is output several times.
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SECTION 1

SERVICING NOTES

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• MODEL IDENTIFICATION
– Back Panel –
PART No.
MODEL
GN100D : SP, MY models
GN100D : EA model
GN100D : E3, E15 models
GN100D : PH model
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3 6 7 1 3 1 5
GN100D : AUS model
GN100D : MX model
GN90D : EA model
GN90D : SP models
GN90D : E15 model
GN90D : PH model
• Abbreviation
E3 : 240 V AC Area in E model
E15 : Iran model
AUS : Australian model
MX : Mexican model
PH : Philippine model
SP : Singapore model
MY : Malaysia model
EA : Saudi Arabia model
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PART No.
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