Sony D-555 - Servicing Notes and Precautions; Handling Optical Pick-up Block; Flexible Circuit Board Repair; Chip Component Replacement

| D-555/Z555
SECTION 2
SERVICING NOTES
NOTES
ON
HANDLING
THE
OPTICAL
PICK-
Before
Replacing
the
Optical
Block
UP
BLOCK
Please
be
sure
to
check
thoroughly
the
parameters
: , ;
.
as
par
the
“Optical
Block
Checking
Procedures”
The:
Taser
ioc:
i
the
“opheal
picky
Weck
tay
(Part
No.:
9-960-027-11)
issued
separately
before
suffer
electrostatic
breakdown
because
of
the
poten-
replacing
the
optical
block.
tial
difference
generated
by
the
charged
electrostatic
Note
and
specifications
required
to
check
are
given
load,
etc.
on
clothing
and
the
human
body.
: ;
;
below.
During
repair,
pay
attention
to
electrostatic
break-
down
and
also
use
the
procedure
in
the
printed
e
FOK
output:
IC501
Q)
pin
matter
which
is
included
in
the
repair
parts.
When
checking
FOK,
remove
the
lead
wire
to
disc
motor and unsolder and open IC801 pin.
® Scarve P-to-P value: 2.95 Vp-p
e@ Adjusted part for focus gain adjustment: RV505
Flexible
Circuit
Board
Repairing
©
RE
signal
P-to-P
value:
0.75
—
1.4
Vp-p
1.
Keep
the
temperature
of
the
soldering
iron
at
©
Traverse
signal
P-to-P
value:
1.8
Vp-p
270°
10°C
during
repairing.
@
The
grating
holder
can
not
repair.
2.
Do
not
touch
the
soldering
iron
more
than
4
e@
Adjusted
part
for
tracking
gain
adjustment:
RV501
seconds
or
3
times
on
the
same
conductor
of
the
circuit
board.
3. Do not apply force on the conductor when
soldering or unsoldering.
Notes on chip component replacement
@ Never reuse a disconnected chip component.
® Notice that the minus side of a tantalum capacitor
may be damaged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE
WITH
MARK
A
ON
THE
SCHEMATIC
DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.