VES Off Mode
Assumption:
| • | Rear Seat Audio (RSA) is off. |
| • | Video screen is up (stored) position. |
When the ignition switch is turned to the ACC or RUN position, the radio,
Tape Retract Module (TRM), the Video Cassette Player (VCP), the Auxiliary
Video Module (AVM), the video screen and the Rear Seat Audio (RSA) control
receive voltage, however none of these components are active (or turned
on).
VES On -- Blank Screen Mode
Assumption:
| • | Ignition switch is in the ACC or RUN position. |
| • | Rear Seat Audio (RSA) is off. |
| • | The Video Cassette Player (VCP) is stopped. |
When the video screen is placed in the down (viewing) position, a position
switch inside the video screen closes and sends a voltage signal to the AVM.
The AVM turns on and also turns on the backlight on the video screen.
VES On -- VCP Playing Mode
Assumption:
| • | Ignition switch is in the ACC or RUN position. |
| • | Rear Seat Audio (RSA) is off. |
| • | The Video Cassette Player (VCP) is playing. |
The VCP sends a video image signal to the AVM. When the AVM is in the
VCP mode, the AVM sends this video signal to the video screen, and produces
images.
The VCP also sends stereo audio channels to the AVM. Then, the AVM produces
two outputs, one set with a low loudness level for headphone use, and another
one that is amplified for the rear speakers. The AVM routes the video audio
channels through the Interface Module (IM), which are bussed and distributed
to the Second Seat Audio (SSA) and Third Seat Audio (TSA) controls. The
AVM sends the amplified video audio channels to the IM, which are then routed
to the rear speakers.
VES On -- VCP and Radio Playing Mode
Assumption:
| • | Ignition switch is in the ACC or RUN position. |
| • | Rear Seat Audio (RSA) is off. |
| • | The Video Cassette Player (VCP) is playing. |
When the Interface Module (IM) senses that the radio is on, the rear
speakers are muted.
VES On -- VCP, Radio and RSA Playing Mode
Assumption:
| • | Ignition switch is in the ACC or RUN position. |
| • | Rear Seat Audio (RSA) is on. |
| • | The Video Cassette Player (VCP) is playing. |
The radio enables the Rear Seat Audio (RSA) when the RSA control is
turned on. The RSA enabling circuit is sent to the RSA controls, Second Seat
Audio (SSA) and Third Seat Audio (TSA) controls. When the user selects AUD
mode on the SSA or TSA control with headphones connected at the SSA or TSA,
audio selected at the RSA control can be heard through the headphones.
Auxiliary Video Module (Inputs)
| • | Circuit 40 (connector C1, terminal A): High with VES relay enabled.
Provides voltage for AVM and IM operation. |
| • | Circuit 40 (connector C2, terminal C): High with the video screen
down and the VES relay energized. When high, the Auxiliary Video Module turns
on, and also turns on the video screen. |
| • | Circuit 46 (connector C1, terminal G): Right video audio channel
(+) from the Video Cassette Player (VCP). |
| • | Circuit 115 (connector C1, terminal F): Right audio channel (-)
from the Video Cassette Player (VCP). |
| • | Circuit 116 (connector C1, terminal D): Left video audio channel
(-) from the Video Cassette Player (VCP). |
| • | Circuit 145 (connector C1, terminal B): High with radio on. When
high, the AVM mutes the rear speakers when playing video audio. |
| • | Circuit 150 (connector C1, terminal K): Provides ground for AVM
operation. |
| • | Circuit 199 (connector C1, terminal C): Left video audio channel
(+) from the Video Cassette Player (VCP). |
| • | WHT wire (connector C1, terminal H): Video signal (-) from the
Video Cassette Player (VCP). |
| • | YEL wire (connector C1, terminal J): Video signal (+) from the
Video Cassette Player (VCP). |
Auxiliary Video Module (Outputs)
| • | Circuit 8 (connector C3, terminal C): Variable voltage input from
the IM when the headlamp switch is in the PARK or HEAD position. Provides
voltage for control illumination at night. |
| • | Circuit 40 (connector C2, terminal D): High when the VES is energized.
Provides voltage to the video screen position switch. |
| • | Circuit 40 (connector C2, terminal E): High when the VES relay
is energized. Provides B+ when the video screen is in the down (viewing) position. |
| • | Circuit 40 (connector C3, terminal A): High with VES relay enabled.
Provides voltage for IM operation. |
| • | Circuit 46 (connector C4, terminal B): Right channel video audio
(+) output to the rear speakers via the IM. The Interface Module (IM) connects
this output to the rear speakers when the radio and the Rear Seat Audio
(RSA) are off. The IM does not send this output to the rear speakers when
either radio or the RSA is on. |
| • | Circuit 46 (connector C4, terminal E): Right channel video audio
(+) output to the Second Seat Audio (SSA) and Third Seat Audio (TSA) controls
(bussed through the IM). |
| • | Circuit 115 (connector C4, terminal A): Right channel video audio
(-) output to the rear speakers via the IM. The Interface Module (IM) connects
this output to the rear speakers when the radio and the Rear Seat Audio
(RSA) are off. The IM does not send this output to the rear speakers when
either radio or the RSA is on. |
| • | Circuit 116 (connector C4, terminal C): Left channel video audio
(-) output to the rear speakers via the IM. The Interface Module (IM) connects
this output to the rear speakers when the radio and the Rear Seat Audio
(RSA) are off. The IM does not send this output to the rear speakers when
either radio or the RSA is on. |
| • | Circuits 115/116 (connector C4, terminal F): Rear channel video
audio (-) output to the Second Seat Audio (SSA) and Third Seat Audio (TSA)
controls (bussed through the IM). |
| • | Circuit 145 (connector C3, terminal D): High with radio on. When
high, the IM mutes the rear speakers when the Rear Seat Audio (RSA) control
is on. |
| • | Circuit 150 (connector C2, terminal B): Provides ground to the
video screen for its operation. |
| • | Circuit 150 (connector C3, terminal B): Provides ground for IM
operation. |
| • | Circuit 199 (connector C4, terminal D): Left channel video audio
(+) output to the rear speakers via the IM. The Interface Module (IM) connects
this output to the rear speakers when the radio and the Rear Seat Audio
(RSA) are off. The IM does not send this output to the rear speakers when
either radio or the RSA is on. |
| • | Circuit 199 (connector C4, terminal G): Left channel video audio
(+) output to the Second Seat Audio (SSA) and Third Seat Audio (TSA) controls
(bussed through the IM). |
| • | BRN wire (connector C2, terminal A): Video signal (-) to the video
screen. |
| • | GRY wire (connector C2, terminal F): Video signal (+) to the video
screen. |
Headlamp and I/P Lamp Dimmer Switch
Circuit 8 (terminal H): Variable voltage output when the headlamp switch
is in the PARK or HEAD position. Provides voltage to the AVM, SSA, TSA and
RSA for control illumination at night. Bussed through the Interface Module
(IM).
Interface Module (Inputs)
| • | Circuit 8 (terminal A6): Variable voltage input from the headlamp
and I/P lamp dimmer switch when the headlamp switch is in the PARK or HEAD
position. Provides voltage output to the AVM, SSA, TSA and RSA for control
illumination at night. |
| • | Circuit 43 (terminal A8): High with ignition switch in ACC or
RUN position. Bussed to provide voltage to the Rear Seat Audio (RSA) control. |
| • | Circuit 46 (terminal A2): Right rear channel radio audio (+) input
from radio. Bussed to the Rear Seat Audio (RSA), Second Seat Audio (SSA) and
Third Seat Audio (TSA). |
| • | Circuit 46 (terminal B2): Right rear channel radio audio (+) input
from the Rear Seat Audio (RSA) control. Provides radio audio to the rear speakers
when both the RSA and the AVM are off. |
| • | Circuit 115 ( terminal A1): Right rear channel radio audio (+)
input from radio. Bussed to the Rear Seat Audio (RSA), Second Seat Audio (SSA)
and Third Seat Audio (TSA). |
| • | Circuit 115 (terminal B1): Right rear channel radio audio (-)
input from the Rear Seat Audio (RSA) control. Provides radio audio to the
rear speakers when both the RSA and the AVM are off. |
| • | Circuit 116 (terminal A3): Left rear channel radio audio (-) input
from radio. Bussed to the Rear Seat Audio (RSA), Second Seat Audio (SSA) and
Third Seat Audio (TSA). |
| • | Circuit 116 (terminal B3): Left rear channel radio audio (-) input
from the Rear Seat Audio (RSA) control. Provides radio audio to the rear speakers
when both the RSA and the AVM are off. |
| • | Circuit 199 (terminal A4): Left rear channel radio audio (+) input
from radio. Bussed to the Rear Seat Audio (RSA), Second Seat Audio (SSA) and
Third Seat Audio (TSA). |
| • | Circuit 199 (terminal B4): Left rear channel radio audio (+) input
from the Rear Seat Audio (RSA) control. Provides radio audio to the rear speakers
when both the RSA and the AVM are off. |
| • | Circuit 351 (terminal B6): Provides ground for IM and Rear Seat
Audio (RSA) functions. |
| • | Circuit 906 (terminal B5): High with the rear seat audio mode
enabled. Bussed to provide rear seat audio enabled signal to the Rear Seat
Audio (RSA), Second Seat Audio (SSA) and Third Seat Audio (TSA). When high,
the RSA, SSA and TSA connect the headphone jacks to the rear speaker audio
radio output. |
Interface Module (Outputs)
| • | Circuit 46 (terminal B2): Right channel video audio (+) output
to the rear speakers when the radio and the Rear Seat Audio (RSA) are off.
The IM does not send this output to the rear speakers when either radio
or the RSA is on. |
| • | Circuit 115 (terminal B1): Right channel video audio (-) output
to the rear speakers when the radio and the Rear Seat Audio (RSA) are off.
The IM does not send this output to the rear speakers when either radio
or the RSA is on. |
| • | Circuit 116 (terminal B3): Left channel video audio (-) output
to the rear speakers via when the radio and the Rear Seat Audio (RSA) are
off. The IM does not send this output to the rear speakers when either radio
or the RSA is on. |
| • | Circuit 199 (terminal B4): Left channel video audio (+) output
to the rear speakers when the radio and the Rear Seat Audio (RSA) are off.
The IM does not send this output to the rear speakers when either radio
or the RSA is on. |
| • | Circuit 1011 (terminal A5): High with the RSA is turned on. Used
to signal the radio that the RSA is on. Then, the radio enables the RSA enabling
circuit, and changes the speaker level output of its rear audio channels
from speaker level to headphone level. |
Radio (Inputs)
| • | Circuit 43 (connector C1, terminal 9): High with the ignition
switch in ACC or RUN position. When high, allows the radio to turn on. When
low, the radio turns off. |
| • | Circuit 1011 (connector C2, terminal 13): High with the RSA is
turned on. When high, the radio senses that the Rear Seat Audio (RSA) is on.
Then, the radio enables the RSA enabling circuit (CKT 906), and changes
the speaker level output of its rear audio channels from speaker level to
headphone level. |
Radio (Outputs)
| • | Circuit 46 (connector C2, terminal 18): Right rear channel radio
audio output (+). The radio changes the level output between speaker level
(when the Rear Seat Audio is off) and headphone level (when the Rear Seat
Audio is on). |
| • | Circuit 115 (connector C2, terminal 17): Right rear channel radio
audio output (-). The radio changes the level output between speaker level
(when the Rear Seat Audio is off) and headphone level (when the Rear Seat
Audio is on). |
| • | Circuit 116 (connector C2, terminal 19): Left rear channel radio
audio output (-). The radio changes the level output between speaker level
(when the Rear Seat Audio is off) and headphone level (when the Rear Seat
Audio is on). |
| • | Circuit 145 (connector C1, terminal 8): High when the radio is
on. This signal is used by the RSA which mutes the rear speakers. |
| • | Circuit 199 (connector C2, terminal 20): Left rear channel radio
audio output (+). The radio changes the level output between speaker level
(when the Rear Seat Audio is off) and headphone level (when the Rear Seat
Audio is on). |
| • | Circuit 906 (connector C2, terminal 12): High with the rear seat
audio mode enabled. When high, the Rear Seat Audio (RSA), Second Seat Audio
(SSA) and Third Seat Audio (TSA) connect the headphone jacks to the rear
speaker audio radio output. |
Rear Seat Audio (RSA) Control (Inputs)
| • | Circuit 8 (terminal A6): Variable voltage input from the IM when
the headlamp switch is in the PARK or HEAD position. Provides voltage for
control illumination at night. |
| • | Circuit 43 (terminal A8): High with ignition switch in ACC or
RUN position. Provides voltage to the RSA control. |
| • | Circuit 46 (terminal A2): Right rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high), radio audio is sent
to the headphone jacks. When the RSA is off (CKT 906 is low), radio audio
is sent to the Interface Module (IM) and then sent to the rear speakers,
as long as the AVM is off. |
| • | Circuit 115 ( terminal A1): Right rear channel radio audio (+)
input from radio. When the RSA is on (and CKT 906 is high), radio audio is
sent to the headphone jacks. When the RSA is off (CKT 906 is low), radio
audio is sent to the Interface Module (IM) and then sent to the rear speakers,
as long as the AVM is off. |
| • | Circuit 116 (terminal A3): Left rear channel radio audio (-) input
from radio. When the RSA is on (and CKT 906 is high), radio audio is sent
to the headphone jacks. When the RSA is off (CKT 906 is low), radio audio
is sent to the Interface Module (IM) and then sent to the rear speakers,
as long as the AVM is off. |
| • | Circuit 199 (terminal A4): Left rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high), radio audio is sent
to the headphone jacks. When the RSA is off (CKT 906 is low), radio audio
is sent to the Interface Module (IM) and then sent to the rear speakers,
as long as the AVM is off. |
| • | Circuit 351 (terminal B6): Provides ground for RSA operation. |
| • | Circuit 906 (terminal B5): High with the rear seat audio mode
enabled. When high, the RSA connects the headphone jacks to the rear speaker
audio radio output. |
Rear Seat Audio (RSA) Control (Output)
Circuit 1011 (terminal A5): High with the RSA is turned on. Used to
signal the radio that the RSA is on. Then, the radio enables the RSA enabling
circuit, and changes the speaker level output of its rear audio channels
from speaker level to headphone level.
Second Seat Audio (SSA) Control
| • | Circuit 8 (terminal A): Variable voltage input from the IM when
the headlamp switch is in the PARK or HEAD position. Provides voltage for
control illumination at night. |
| • | Circuit 46 (terminal C): Right rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high) and the SSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 46 (terminal G): Right rear channel video audio (+) input
from the AVM. When the SSA is in VCP mode, video audio is sent to the headphone
jacks. |
| • | Circuit 115 ( terminal B): Right rear channel radio audio (-)
input from radio. When the RSA is on (and CKT 906 is high) and the SSA is
in AUD mode, radio audio is sent to the headphone jacks. |
| • | Circuit 115 ( terminal F): Right rear channel video audio (-)
input from the AVM. When the SSA is in VCP mode, video audio is sent to the
headphone jacks. |
| • | Circuit 116 (terminal D): Left rear channel radio audio (-) input
from radio. When the RSA is on (and CKT 906 is high) and the SSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 116 (terminal H): Left rear channel video audio (-) input
from the AVM. When the SSA is in VCP mode, video audio is sent to the headphone
jacks. |
| • | Circuit 150 (terminal K): Provides ground for SSA operation. |
| • | Circuit 199 (terminal E): Left rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high) and the SSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 199 (terminal J): Left rear channel video audio (+) input
from the AVM. When the SSA is in VCP mode, video audio is sent to the headphone
jacks. |
| • | Circuit 906 (terminal L): High with the rear seat audio mode enabled.
When high and with the SSA in AUD mode, the SSA connects the headphone jacks
to the rear speaker audio radio output. |
Tape Retract Module (Inputs)
| • | Circuit 40 (terminal A): provides B+ for VCP use. |
| • | Circuit 40 (terminal C): when high, enables power feed circuit
to the VCP. When low, the TRM disables voltage to the VCP for several seconds,
then restores power again to the VCP for a couple of seconds; this action
allows the VCP to retract the VHS tape from the playback heads if the VCP
was playing at the time the ignition switch was turned off. |
| | Circuit 150 (terminal B): provides ground for TRM operation. |
Tape Retract Module (Output)
Circuit 40 (terminal D): provides voltage to the VCP when the VES relay
is energized; also provides B+ for several seconds after the VES relay is
off, allowing the VCP to retract the VHS tape from the playback heads if
the VCP was playing at the time the ignition switch was turned off.
Third Seat Audio (TSA) Control
| • | Circuit 8 (terminal A): Variable voltage input from the IM when
the headlamp switch is in the PARK or HEAD position. Provides voltage for
control illumination at night. |
| • | Circuit 46 (terminal C): Right rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high) and the TSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 46 (terminal G): Right rear channel video audio (+) input
from the AVM. When the TSA is in VCP mode, video audio is sent to the headphone
jacks. |
| • | Circuit 115 ( terminal B): Right rear channel radio audio (-)
input from radio. When the RSA is on (and CKT 906 is high) and the TSA is
in AUD mode, radio audio is sent to the headphone jacks. |
| • | Circuit 115 ( terminal F): Right rear channel video audio (-)
input from the AVM. When the TSA is in VCP mode, video audio is sent to the
headphone jacks. |
| • | Circuit 116 (terminal D): Left rear channel radio audio (-) input
from radio. When the RSA is on (and CKT 906 is high) and the TSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 116 (terminal H): Left rear channel video audio (-) input
from the AVM. When the TSA is in VCP mode, video audio is sent to the headphone
jacks. |
| • | Circuit 150 (terminal K): Provides ground for TSA operation. |
| • | Circuit 199 (terminal E): Left rear channel radio audio (+) input
from radio. When the RSA is on (and CKT 906 is high) and the TSA is in AUD
mode, radio audio is sent to the headphone jacks. |
| • | Circuit 906 (terminal L): High with the rear seat audio mode enabled.
When high and with the TSA in AUD mode, the TSA connects the headphone jacks
to the rear speaker audio radio output. |
Video Cassette Player (VCP) (Inputs)
| • | Circuit 40: (connector C1): High with VES relay enabled, and for
several seconds after turning the ignition switch to off. Provides B+ for
VCP operation. |
| • | Circuit 150 (connector C1): Provides ground for VCP operation. |
Video Cassette Player (VCP) (Outputs)
| • | Circuit 46 (connector C3): Right audio channel (+) to the Auxiliary
Video Module (AVM). |
| • | Circuit 115 (connector C3): Right audio channel (-) to the Auxiliary
Video Module (AVM). |
| • | Circuit 116 (connector C2): Left audio channel (-) to the Auxiliary
Video Module (AVM). |
| • | Circuit 199 (connector C2): Left audio channel (+) to the Auxiliary
Video Module (AVM). |
| • | BRN wire (connector C4): Video Signal (-) to the Auxiliary Video
Module (AVM). |
| • | GRY wire (connector C4): Video Signal (+) to the Auxiliary Video
Module (AVM). |
Video Entertainment System (VES) Relay (Inputs)
| • | Circuit 39 (terminal C2): High with ignition switch in ACC or
RUN position. When high, the VES relay is energized. This action closes the
VES relay contacts, providing power to VES components. |
| • | Circuit 40 (terminal A2): Always high. Used to provide power to
VES components when the VES relay is energized. |
| • | Circuit 150 (terminal A1): provides ground to the VES relay coil. |
Video Entertainment System (VES) Relay (Output)
Circuit 40 (terminal C1): Provides B+ to VES components when the VES
relay is energized.
