Adjustment Procedures - C.E.C. 780CD Service Manual

ADJUSTMENT PROCEDURES
CAUTION:
Avoid eye exposure to invisible laser beam which is
: Insulator Board
emitted from laser pickup.
(wood, plastic etc.)
PRECAUTIONS REGARADING ADJUSTMENT
@ Adjustment is performed in the indicated order.
@ When adjustment is made. for one item, check the other
items which follow.
@ The laser pick-up has already been precisely adjusted.
Do not touch its mounting screws or controls.
e@ Refer to the adjustment diagram for the test points and
Do not adjust adjustment controls.
@ The ground point for the measurement equipment is the
@ When the diffraction grid is adjusted, remove the test point indicated as GND.
mechanism. It is convenient to place an insulating panel
on top of the chassis, and then to place the mechanism ground point of P.C.BORD:
on top of this. (The wires are connected.) JP042, JP132, JP143
POO3
E/F BALANCE
JP132 =
(GND)
JP143(GND)
JPO42(GND)