Sony CFD-21 - Chuck Plate Jig on Repairing

SECTION 1
CFD-20/30
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-
UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial 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. There-
fore, when checking the laser diode emission, observe
more than 25 cm away from the objective lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid,
use Chuck Plate Jig.
@ Code number of Chuck Plate Jig: X-4918-255-1
Removing the chuck plate
The chuck plate of this unit can be removed and used as a chuck
plate jig. :
1. Pull the chuck plate in the direction A.
2. Press the claw of the CD cover, and remove the chuck plate in
direction B.
CD cover
f
ES ]
A Me ih |
y P/E LZ /
x chuck plate
BLL
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claw
LASER DIODE AND FOCUS SEARCH
OPERATION CHECK
1. Make Function switch to CD position with no disc
inserted.
Open the lid for CD.
Tum on S810 as following figure.
Press > key.
ue BO SS
Confirm the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power
Control circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus
serarch.