Servicing Notes - Sony HCD-GN700 Service Manual

HCD-GN700/GX8800
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.
4
SECTION 1

SERVICING NOTES

• MODEL IDENTIFICATION
– Back Panel –
GN700 : E2, E3models
GN700 : E51 model
GN8800 : US models
GN700 : Mexican model
GN700 : Argentina model
• Abbreviation
E2
E3
E51
PART No.
MODEL
: 120 V AC Area in E model
: 240 V AC Area in E model
: Chilean and Peruvian model
PART No.
4-244-106-0 []
4-244-106-1 []
4-244-106-2 []
4-244-106-3 []
4-244-106-4 []