Quantcast Table 7-3.--Alarm Circuit Trouble Chart
 

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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

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