23
Figure 30.
Base station circuit boards
A - Transmitter antenna connector
N - VAA level control - R113
B - Receiver antenna connector
O - Inbound volume control - R43
C - Wired backup system switch - S2
P - Automatic test equipment connector - J1
D - DM2 select switch - S1
Q - Message record LED - DS7
E - Power and ceiling speaker connector - J2
R - Receiver LED - DS1
F
- Record message switch - S2
S - Channel “A” and “B” LEDs - DS4, DS5
G - Message repeater ON/OFF switch - S3
T
- Vehicle present LED - DS6
H - Speed team switch - S5
U - Channel “A” and “B” sidetone level controls - R77, R60
I
- Vehicle detector override switch - S7
V - Message volume controls - R292, R293
J
- Frequency select switch - S1
W - Vehicle present tone volume control - R160
K - Ceiling speaker volume controls - R142,
X - System configuration switches - S4, S6, S8, S9, S10
R294, R298, R299, R300
Y - Base-to-base connector (for dual drive-thru operations) - J9
L
- Outside speaker volume control - R128
Z
- Remote display connector - J15
M - Power supply LED - DS3
