4-27. PRELIMINARY SERVICING AND ADJUSTMENT. (CONT)
The second interlock circuit also contains two interlock switches. S109 DOOR CLOSED TOP (4) is activated when
TRANSMITTER PANEL (5) is open. S110 DOOR CLOSED BOTTOM (6) is activated when SCR ACCESS PANEL (7) is
open. Both these interlock switches are in series with high-voltage Interlock signal. When either TRANSMITTER PANEL
or SCR ACCESS PANEL is open, interlock circuit Is disabled and high voltage Is shut off. Ensure TRANSMITTER
PANEL and SCR ACCESS PANEL are closed and secured prior to power application so that high voltage required by
receiver-transmitter will be available.
INITIAL TURN-ON PROCEDURE
See paragraphs 2-4 and 2-5 for Initial adjustments and turn-on procedures for radar set.