The VM9311 (Phase Linear UV7 also), VM9411,
VM9511TS and VM9021TS incorporate a new video inhibit circuit. The Parking
Brake Inhibit wire is the same as previous models – PINK. In order for video to be displayed, the pink wire cannot
be simply “grounded, a brake (pulse) sequence must be completed before the head
unit will display video. These instructions are clearly indicated in each
operation manual for each unit, but this paper will explain the procedure for
convenience.
Before starting
the parking brake sequence, the head unit must be “ON” with video media (i.e. –
a disc) inserted and playing. At this point, the blue warning screen with
yellow writing will appear. The parking brake sequence can now be started.
There are two situations, in which, the parking brake sequence can begin:
·
Parking brake is engaged
(ON) when the vehicle is started or ACC / IGN is
turned ON. To activate video;
o Release parking brake for 1 ~ 2 seconds
o Reapply parking brake
o Video should be displayed on the TFT monitor within 1 ~ 2
seconds. If video is not displayed, then the brake sequence will need to be
repeated. The timing window is 1 ~ 2 seconds, if the time is less than or
greater than this time, video will not be displayed. Allow 10 seconds between repeated attempts or the video will remain
locked out.
·
Parking brake is not engaged (OFF) when the vehicle is started or ACC / IGN is turned ON. To activate video;
o Apply parking brake for 1 ~ 2 seconds
o Release parking brake for 1 ~ 2 seconds
o Reapply parking brake
o Video should be displayed on the TFT monitor within 1 ~ 2
seconds. If video is not displayed, then the brake sequence will need to be
repeated. Allow 10 seconds between
repeated attempts or the video will remain locked out.
Note: Depending on the vehicle, the brake “switch” may engage
before the actual brake stops or reaches its end of travel point. This must be
taken into consideration when applying the brake sequence. A few attempts may
be necessary to familiarize the end-user with his or her vehicle.