Safety Precautions - RCA SelectaVision VideoDisc SFT 100 Service Data

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SAFETY PRECAUTIONS
Before returning any instrument to the customer a safety check of
the entire VideoDisc Player should be made. The service techni-
cian must be sure that no protective device built into the instru-
ment by the manufacturer has become defective or inadvertently
defeated during servicing, so be sure you conduct all the checks
and tests below.
Comply with all caution and safety related notes located on or in-
side the VideoDisc Player cabinet and on the player deck.
WARNING: Alterations of the design or circuitry of this VideoDisc
Player should not be made.
Any design alterations or additions such as, but not limited to. cir-
cuit modifications, auxiliary speaker jacks, switches, grounding
active or passive circuitry, use of unauthorized cables, accesso-
ries. etc. may aiter the safety characteristics of this VideoDisc
Player and potentially create a hazardous situation for the user.
Any design alterations or unauthorized additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
therefrom.
Use only authorized lubricants where lubricants are specified. If
you lubricate, remove any excess lubricants.
When reassembling the VideoDisc Player. always be certain that
all the protective devices are put back in place. such as non-
metallic control knobs, insulating fishpapers, adjustment and
compartment covers/shields, isolation resistor capacitor net-
works, etc.
When service is required, observe the originai lead dress. Compo-
nents that indicate evidence of overheating or other electrical or
mechanical damage should be replaced.
Do not change component configuration (spacing. clearance,
etc.). Example: Resistor spaced off of printed board.
Leakage Resistance Cold Check
With the AC plug removed from the 120V AC source, place a
jumper across the two plug prongs. Turn the instrument AC
Switch on by placing the function lever in the "play" position.
Using an ohmmeter. connect one lead to the jumpered AC plug
and touch the other lead to all push buttons/customer controls,
all customer exposed metal or conductive parts of the cabinet
such as screwheads, metal or metalized overlays. control shafts,
etc. except antenna connections.
The resistance measured should not be less than 1 megohm. Now
measure the resistance of the antenna connections which should
not be less than one megohm or greater than 5.2 megohms ex-
cept for the center connection of the F connector that feeds the
TV receiver which measures "open" when the function switch is
in the "piay" position. Any resistance value below or above the
values specified indicates an abnormality which requires correc-
tive action. Repeat all the preceding tests with the function
switch in the "off" and "load/unload" positions: All the preceding
tests should be conducted with a disc in the player and repeated
without a disc in the player.
Leakage Current Hot Check
(On Completely Assembled instrument) With a Disc in
the Player and all Tests Repeated without a Disc in the
Player)
Plug the AC line cord directly into a 120V AC outlet (do not use an
isolation transformer for this check). Use a Leakage Current
Tester or a metering system which complies with American Na-
tional Standards Institute (ANSI C101.1 "Leakage Current for Ap-
pliances") and Underwriters Laboratories (UL) 1410 (507).
Measure for current with the function switch in the "play" posi-
tion and repeat with the function switch in the "load/unload" and
"off' positions from all customer exposed metal or con-
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ductive parts of the cabinet (antenna connections. screwheads.
metal or conductive overlays. customer push buttons/controls.
control shafts. etc.) to a known earth ground (waterpipe. conduit,
etc.). particularly. any exposed metal or conductive part having a
return path to the chassis. Any current measured must not exceed
0.5 milliamp. Reverse plug in the AC outlet and repeat test. ANY
MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE
ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND COR-
RECTIVE ACTION MUST BE TAKEN BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER.
AC Leakage Test
Interconnected Equipment AC Leakage Test
Avoid shock hazards. The television instrument, accessory. or ca-
ble(s) to which this VideoDisc Player is connected should have
the applicable sections of the leakage resistance cold check and
the leakage current hot check performed. Do not connect this
VideoDisc Player to a TV antenna, cable or accessory that ex-
hibits excessive leakage currents.
Product Safety Notice
Many electrical and mechanical parts in VideoDisc Players have
special safety related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are iden-
tified in this Data and its Supplements and Bulletins. Electrical
components having such features are identified by shading on
the schematics and by (*) on the parts list in this Data and its
Supplements and Bulletins. The use of a substitute replacement
which does not have the same safety characteristics as the
recommended replacement part shown in the parts list in this
Data and its Supplements and Bulletins may create shock, fire or
other hazards. Product Safety is continuously under review and
new instructions are issued trom time to time. For the latest infor-
mation always consult the current RCA Service Data, Supple-
ments and Bulletins. A subscription to. or additional copies of.
RCA Service Data may be obtained at a nominal charge from your
RCA Consumer Electronics Distributor or from RCA Technical
Publications. 600 North Sherman Drive. Indianapolis, Indiana
46201.