Sony D-5 - Caution for Electrostatic Breakdown; Handling the Optical Pick-up Block

D-5/D-50 |
— CAUTION FOR ELECTROSTATIC BREAKDOWN —
NOTES
ON
HANDLING
THE
OPTICAL
PICK-UP
BLOCK
(KSS-110A)
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.
The printed matter below is included in the repair
parts. During repair, use the procedure in the printed
matter.
The flexible board is easily damaged and should be
handled with care.
The following method is an example for reference
purposes:
Printed Matter Included in the Repair Parts
1.
Place a conductive sheet on the workbench.
(The black sheet used as repair parts wrapping).
Place the set on the conductive sheet so that
the chassis touches the sheet. (This makes it the
same potential as the conductive sheet).
Place your hands on the conductive sheet. (This
makes them the same potential as the sheet).
Remove the optical pick-up block.
Perform work on top of the conductive sheet,
Be careful that clothing does not touch the
optical pick-up block.
When
opening
or
repairing
the
unit,
the
procedure
for
grounding
as
follows
is
required
to
prevent
damage
caused by static electricity.
Grounding for the human body
Be
sure
to
put
on
a
wrist-strap
for
grounding
(with
impedance
lower
than
108
Q)
whose
other
end
is
grounded.
The
strap
works
to
drain
away
the
static
electricity
build-up
on
the
human
body.
Grounding for the work table
Be
sure
to
lay
on
the
table
a
conductive
sheet
(with
impedance
lower
than
10°
Q)
such
as
sheet
of
copper, which is grounded.
As
static
electricity
build-up
on
clothes
is
not
drainded
away,
be
careful
not
to
let
your
clothes
touch
the unit.
Handling the flexible board
The flexible board is easily damaged and should be handled with care.
@ Wrist-strap
for grounding