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cDP-68 /207Es,D/75,0
N O T E S O N H A N D L I N G T H E O P T I C A L P I C K .
U P B L O C K O R B A S E U N I T
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial difference generated by the charged electrostatrc
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.
NOÎES ON LASER DIODE EMISSION CHECK
The laser beam on this model is conccntrated so
as to be focused on the disc reflective surface by the
objective lens in the optical pick-up block.
There-
fore, when checking the lasçr diode emission, obserye
more than 25 cm away from the objective lens.
Flexible Circuit Board Repairing
o Keep the temperature of the soldering iron around
270oC during repairing.
a Do not touch the soldering iron on the same conduc-
tor of the circuit board (within 3 times).
o Be careful not to apply force on the conductor when
soldering or unsoldering.
Notes on chip component replacement
o Never reuse a disconnected chip component.
o Notice that the minus side of a tantalum capacitor
may be damaged by heat.
- SERVICING NOTE -
LASER DIODE AND FOCUS SERCH OPERATION
CHECK
l. Make POWER switch on with no disc inserted and
disc table closed.
2. Confirm that the operation indicated in Fig. A is
performed while observing the objecting lens.
@ Cortir-
that tser beam is spread.
@ Up and down motion of the objactiye
lens (3 timesl
Fig. A
FNONT SIDE
- 5 -
- ' t
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