General Information - RCA SelectaVision VideoDisc SFT 100 Service Data

CED-1
GENERAL INFORMATION
NOTE: Technicians servicing this product will find helpful the following related
RCA Technical Training Publications:
VideoDisc Technical Manual SFT1-TM, and Workshop Manual SFT1-1.
These publications may be ordered. for a nominal charge. from: RCA Technical
Publications 1-450. 600 М. Sherman Dr., Indianapolis. IN 46201.
The RCA SelectaVision VideoDisc Player. being a complete new
product, has many innovative electronic and mechanical
features. The player is simple to operate. and is easy to install. Ex-
ternal connections to and from the player are minimal. involving
only intercept and reconnection o! the television VHF antenna in-
put lead (cable). Necessary connecting lead (cable) and match-
ing transformers are included to handle ali but unusual installa-
tions.
1. А 5 foot. 75 ohm coaxial cable connects from the antenna out
connector on the player. to the VHF antenna input on the
television receiver. Use cable direct if the television has 75
ohm VHF antenna input connector: use via a 75 to 300 ohm
matching transtormer/adaptor if the television VHF antenna
input is 300 ohm.
2. A300 to 75 ohm matching transformer/adaptor mates a 300
ohm twin lead antenna system (outside or rabbit ears) to the
player 75 ohm antenna input system. (Captive. screw type
lugs are integral to the 300 to 75 ohm antenna matching trans-
former/adaptor: strip and insert the 300 ohm twin lead wires
then tighten the screws.) Keep in mind — for different or
"odd" antenna systems — the antenna input and output of
the VideoDisc Player 1s 75 ohm unbalanced.
Antenna connection instructions should be carefully followed.
The player produces an R-F signal which is transmitted on УНЕ
Channel 3 or 4 (switch selectable) frequency. If the player anten-
na output is connected to an antenna. directly or in parallel from
the television antenna input connections, the player may broad-
Button
Access Doar
Auxiliary
Caddy Side Elapsed
Entry Door Indicator Time Function
LED's Readout Switch
(Front View)
cast a signat. Broadcasting an unauthorized signal could violate
certain regulations of the Federal Communications Commission
regarding the operation of R-F devices. Recheck the installation
10 avoid any broadcasting possibilities: make sure the 75 ohm
shielded cable is used to connect the R-F output of the player to
{һе television receiver, and that no other connections are
paralleled from these terminals.
The physical location of the antenna "in" and "out" connectors
are depicted in the rear apron photo of the VideoDisc Player (Fig.
1-1). "F" type connectors accept the VHF antenna input and out-
put cables.
Interface of the antenna system. VideoDisc Player. and monitor
television receiver is controlled by an antenna switch on the play-
er. The antenna switch on the player is link connected to the Play-
er Function Switch (Fig. 1-1). When the Player Function Switch is
in the "OFF" position. the antenna is connected directly (via the
player antenna switch) to the television receiver and the televi-
sion will operate normaily. When the player function switch is in
the "Play" or "Load" position. the antenna is disconnected and
the player R-F output is connected directly to the television VHF
antenna input connector. Under this condition the television
receiver will receive a signal only on Channels 3 or 4 (switch
selectable on the rear of VideoDisc Player Fig. 1-1). Specifically
the VideoDisc Player antenna switch system serves to either con-
nect the antenna system direct to the television VHF antenna in-
put or disconnect the antenna system and connect the VideoDisc
Player R-F output direct to the television VHF antenna connector.
Remove Screw Push Button Remove Screw
For Access Door Ғог Cabinet Тор
Removal
Remove Screw
For Cabinet Тор For Cabinet Тор
Removal Removal
75 Ohm 75 Ohm
Antenna RF Output
input To Television
Channel Switch
(Rear View)
Fig. 1-1. — SFT 100