Technics SL-PJ33 - Page 7

SL-PJ33 SL-PJ33
M@ HANDLING PRECAUTIONS FOR OPTICAL PICKUP
The laser diode in the optical pickup may break down due to potential difference caused by static electricity of
clothes or human body.
So, be careful of electrostatic breakdown during repair of the optical pickup.
® Handling of optical pickup
1. Do not give excessive shock to the optical pickup
because it is of extremely precise structure. Optical pickup
2. To prevent the breakdown of the laser diode, an anti-
static shorting pin is inserted into the flexible board.
When removing or connecting the short pin, finish the
job in as short a time as possible.
3. Take care not to apply excessive stress to the flexible
board.
4. Do not turn the variable resistor (laser power adjust-
ment). It has already been adjusted.
Lens
(Do not touch)
Variable resistor
(Do
not
turn)
Be
sure
to
short
this
portion
(Use the shorting pin or clip.)
Flexible board
(Handie it carefully)
¢ Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to relieve the static
electricity from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the
area where the optical pickup is placed, and ground the Wrist strap
sheet.
(Anti-static
bracelet)
Caution:
The static electricity of your clothes will not be grounded
through the wrist strap. So, take care not to let your
clothes touch the optical pickup.
iron plate or some metals
to conduct electricity.
@ DISASSEMBLY INSTRUCTIONS
CAUTION:
e It is very dangerous to look at or touch laser radiation. (Laser radiation is invisible.)
e
With
the
unit
turned
“on”,
laser
radiation
is
emitted
from
the
pickup
lens.
e
When
doing
the
job,
removing
the
cabinet
and
disc
clamper
of
this
unit,
be
sure
to
turn
the
power
supply
off.
How to remove the cabinet
Procedure bottom of the unit. (See page 4)
Note: Locking the lock shaft at the
1 eRemove the 4 setscrews. m (Free) — @ (Lock)
Note: How to remove the flat cable.
Procedure
Pull
out
the
flat
cable
while
1mp>2
pressing
the
connector.
Remove in the same
way as number @.
Remove in the
direction of the arrow. 4
Remove the setscrew.
Remove from the
projection of the chassis.