Early Design

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The Video Cassette Player (VCP) plays pre-recorded VHS cassettes. The Tape Retract Module (TRM) supplies the VCP with voltage when the ignition is on and the LCD display screen is pulled down in the viewing position. When the ignition is turned off, the TRM and the VCP lose power at the same time. The TRM has a timer function that allows battery voltage to be restored to the VCP for 12 seconds to retract the cassette tape from the playback head, thus preventing cassette damage. Note that the "cassette in" indicator lamp in the VCP turns on during the 12 second period when the VHS tape is unloaded in the VCP.

DIAGNOSTIC AIDS
^ Check for the following conditions:
- Short to B+ on the IGN voltage input to the TRM.
- A faulty TRM
^ An intermittent failure may be very difficult to detect and to diagnose accurately. Faulty electrical connections or wiring causes most intermittent problems. When an intermittent condition is suspected, check the suspected circuits for the following conditions:
- Improperly formed or damaged terminals.
- Wire chafing.
- Damage to connector bodies.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. Determines whether the LCD screen turns the backlight on when the ignition is not on.
5. Verifies repairs made to the VES system.