Table 7-3.--Alarm Circuit Trouble Chart

Table 7-3.--Alarm Circuit Trouble Chart

diode by measuring the front-to-back resistance ratio.

symptoms and probable defective assemblies or

The ratio should be at least 100 to 1.

components.

RELAYS.-- If operation indicates that a relay

DIODES.-- If operation indicates that a

is defective, use the relay test facility located behind the

diode is defective, disconnect one lead of the diode,

front panel of the control rack to check the relay. The

being careful not to overheat the diode. Check the

Table 7-4.--Amplifier Circuit Trouble Chart

7-23