Connections - Zenith Presentation Series Service Manual

CONNECTIONS

The connection center on the rear of the TV allows for
connection of the viewing source. The diagrams on the
next page list the use of each jack on the connection
center.
OUTPUTS
S-Video Loop out luminance is on pin 34 and chroma is
on pin 32 of ICX2900. The analog stereo comes from
pins 6 and 7 of IC1400 before running through a pre-
amplifier circuit. After the pre-amp stage, the audio passes
to the jackpack.
CAMPORT
Some models have video and right/left audio input jacks
on the front of the receiver. These jacks can be used to
view video tapes from a VCR or Camcorder. When the
video cable is plugged into the jack, the shorting jack
J1 opens, placing a high at pin 10 of the IC6000 micro-
processor. This switches the TV into the auxiliary mode.
As long as the cables are attached, the TV set will be
locked in auxiliary mode. Use of a remote control or
buttons on the front of the set will not permit switch-
ing into tuner mode until the video cable is discon-
SR23 - 923-03509
CONNECTIONS
nected.
SUPERPORT - MPI
Zenith Commercial Product receivers are now being
adapted to interact with other equipment. Prime ex-
amples of this can be found in Lodging and Health Care
situations where the set is controlled from the main of-
fice.
All this is made possible by the new technology that is
being built into these receivers. The SuperPort or Mul-
tiple Protocol Interface (MPI) jack and associated cir-
cuitry allow remote operation of the set.
MULTIPLE PROTOCOL INTERFACE
Television functions and features are controlled by the
communication of commands and status information
through the Superport by the MPI interface.
EBC (EDGE BOARD CARD)
Allows easy access for removing/installing accessory
modules providing a rail mounted slide-through card.
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CS - GENERAL