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Alpine TMX-R680A Owner's Manual page 12

Mobile overhead monitor

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WIRING/CONNECTIONS
Remote Turn ON
Connecting to the IGN/ACC line for other ALPINE unit or other device such as a small
amplifier to turn them ON synchronizing with the TMX-R680A power ON. It gives
+12V when the power is ON.
GND
This is a common Ground for the main unit and the Dome light. Another GND line connects to
Pin #2 of the external dome light SW.
BATT (Dome Light)
This is a constant +12V for the Dome light. Connect to the Dome light +12V line on the vehicle.
BATT (Main Unit)
This is a constant +12V for the main unit. It is recommended that separate connections from the
Dome light battery line are used to avoid noise and over-current.
Delayed Dome Light Jumper
This is a jumper to enable to the Delayed Dome Light function. When activated, the
Dome light remains ON for 30 seconds after shutting the vehicle's door. However, it
immediately turns off when IGN/ACC is turned ON. It can also be turned off using the
remote or the external dome light SW . Default is disabled.
Door SW Polarity Jumper
This is a jumper to change the factory door SW polarity. There are two common types of
dome light circuits used, positive and negative switched.
Default is the Negative Switched System.
IMPORTANT:
When changing the Jumpers above, make sure the BATT (Main Unit) wire has not been
connected. The Jumper settings will not be recognized if made while BATT is connected.
Variable Audio Output
The output of this connector can be used to drive an external amplifier/speaker combination.
This output will mute when either of the headphone jacks are being used.
12
Delayed Dome
Light Jumper
Left Side View
Door SW
Polarity Jumper

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