Rear Video System Circuit Description

The rear video control signals route rear seat audio or rear video audio and control the system depending on the mode of operation. These modes and signal functions are described below.

Rear Video System Off Mode
Assumption:
^ The radio is off.
^ The Rear Seat Audio (RSA) module is off.
^ The video display screen is up (stored) position.

When the ignition switch is turned to the ACC or RUN position, the radio, the Video Cassette Player (VCP), the video display and the rear seat audio (RSA) module receive voltage however, none of these components are active (or turned on).

Rear Video System on - Blank Screen Mode
Assumption:
^ The ignition switch is in the ACC or RUN position.
^ The radio is off.
^ The Rear Seat Audio (RSA) module is off.
^ The video display screen is down.
^ The Video Cassette Player (VCP) is stopped.

When the video display screen is placed in the down (viewing) position, the upto switch inside the video display closes and turns on the backlight on the screen.

Rear Video System On - VCP Playing Mode
Assumption:
^ The ignition switch is in the ACC or RUN position.
^ The radio is off.
^ The Rear Seat Audio (RSA) module is off.
^ The video display screen is down.
^ The Video Cassette Player (VCP) is playing.

The VCP sends a video image signal to the video display screen, and produces images.

The VCP also sends stereo audio channels to the video display. Then, the video display produces 2 outputs, one set with a low loudness level for headphone use, and another that is amplified for the rear speakers. The video display routes the video audio channels through the auxiliary module to the rear speakers.

Rear Video System On - VCP and Radio Playing Mode
Assumption:
^ The ignition switch is in the ACC or RUN position.
^ The radio is on.
^ The Rear Seat Audio (RSA) module is off.
^ The video screen is down.
^ The Video Cassette Player (VCP) is playing.

When the auxiliary module senses that the radio is on, the rear speakers are muted.

Rear Video System On - VCP, Radio and RSA Playing Mode
Assumption:
^ The ignition switch is in the ACC or RUN position.
^ The radio is on.
^ The Rear Seat Audio (RSA) module is on.
^ The video screen is down.
^ The Video Cassette Player (VCP) is playing.

The radio enables the rear seat audio (RSA) when the RSA module is ON. The RSA enabling circuit is sent to the RSA controls.

Rear Video System On - Vcp And Rsa Playing Mode With The Radio Off
ASSUMPTION:
^ The ignition switch is in the ACC or RUN position.
^ The radio is off.
^ The Rear Seat Audio (RSA) module is on.
^ The video screen is down.
^ The Video Cassette Player (VCP) is playing.

The rear speakers are muted. The headphones play radio audio through one channel and video audio through the other channel.