Sony CDP-400 - Safety Check-Out; Leakage Test

CDP-400/501/5O1ES/610ES
SAFETY CHECK-OUT (US Model)
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Check the metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC
leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5mA (500 microampers). Leakage
current can be measured by anv one of three
methads.
1. A commercial leakage tester. such as the
Simpson 229 or RCA WT-S30A. Follow the
manufacturers’ instructions to use these instru-
ments.
te
A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
sy
Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75V. so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
To Exposed Meta!
Parts an Set
\ i
' 1
i | cee or
1 —4
AC
S184 voltmeter
I
| O15nF >
| 10.75 V)
—+
= Farth Ground
iF ig. A. Using an AC voltmeter tc check AC leakage.
WARNING
To prevent fire or shock hazard, do not ex-
pose the unit to rain or moisture.
This equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in accordance with the instruc-
tion manuai, may cause interference to radio communications. As
temporarily permitted by regulation it has not been tested for com-
pliance with the limits for Class A computing devices pursuant to
Subpart J of Part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference. Operation of this
equipment in a residential area is likely to cause interference in
which case the user at his own expense will be required to take
whatever measures may be required to correct the interference.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NCT REMOVE COVER ‘OR BACK,
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TU OUALIFIED SEAVICE PERSONNEL
This symbol is interided to alert the user to the
presence of uninsulated “dangerous voltage”
within the product's enciosure that may be of
sufficient magnitude to constitute a risk of elec-
tric shock to persons
This symbol is intended to alert the user to the
presence of important operating and mainte
nance (servicing) instructions in the literature
accompanying the appliance.
i
|
L
CAUTION
Use of controls or adjustments or performance of pro-
cedures other than those specified herein may result
in hazardous radiation exposure.
| CDP-400/501 /SO1ES/610ES
— CAUTION FOR ELECTROSTATIC BREAKDOWN —
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (KSS-100A)
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 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.)
2. Place the set on the conductive sheet so that the
chassis touches the sheet. (This makes it the same
potential as the conductive sheet.)
3. Place your hands on the conductive sheet. (This
makes them the same potential as the sheet.)
4. Remove the optical pick-up block from the bag
(conductive).
5, Perform work on top of the conductive sheet.
Be careful that clothing does not touch the optical
pick-up block.
When opening or repairing a KSS-100A, the procedure for grounding as follows is required to prevent
damage caused by static electricity.
1 Grounding for the human bady
Be sure to put on a wrist-strap for grounding (with impedance lower than 10® (2) whose other end is
grounded. The strap works to drain away the static electricity build-up on the human body.
4
2 Grounding for the work table
Be
sure
to
lay
on
the
table
a
conductive
sheet
(with
impedance
lower
than
10°
2)
such
as
a
sheet
of
copper, which is grounded,
3.
As
static
electricity
build-up
on
clothes
is
not
drainded
away,
be
careful
not
to
let
your
clothes
touch
the KSS-100A.
KSS-100A
@ wrist-strap for grounding
protection cap