Mitsubishi 1993 3000GT, Technical Information Manual

Page: 198 / 216

and activates the timer circuit.
The timer circuit outputs to the Tr base a signal that
gradually varies for 6 seconds due to duty control,
and the voltage for the lams is gradually reduced to
dim the lamps.
(3) If the ignition switch is turned ON, the input to NOT
becomes an H signal and the reversed L signal is
input to AND. As a result, even if the door is closed,
the lamp does not dim but is extinguished
immediately since the timer circuit is not activated.
16F0306
7-26
ELECTRICAL -
ETACS
DIMMER TYPE LAMP
(1) If the room lamp switch is the DOOR position and
the door is opened (door switch ON), current from
the battery flows from lamps (room lamp, 'foot lamp
ignition key cylinder illumination lamp)
Æ
ETACS
unit Æ door switch Æ earth and the lamp go on.
(2) If the ignition switch is OFF, input to NOT becomes
an L signal and the reversed H signal is input to
AND.
If a door is closed at this time (door switch OFF), the
circuit of door switch
Æ
earth is cut off and, since an
H signal is input to AND, AND outputs an H signal