User's Manual

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 - Channel “A” and “B” sidetone level controls - R287, R289

E - Frequency select switch - SW1 R - Message record LED - DS7

F - Record message switch - S2 S - Receiver LED - DS1

G - Message repeater ON/OFF switch - S3 T - Channel “A” and “B” LEDs - DS4, DS5

H - Speed team switch - S5 U - Vehicle present LED - DS6

I - Vehicle detector override switch - S7 V - Transmitter message volume control - R292

J - Power and ceiling speaker connector - J2 W - Outside message volume control - R293

K - Ceiling speaker volume controls - R142, X - Vehicle present tone volume control - R160

R294, R298, R299, R300

L - Outside speaker volume control - R128 Y - System configuration switches - S4, S6, S8, S9, S10

M - Power supply LED - DS3 Z - Base-to-base connector (for dual drive-thru operations) - J9