Figure 22. EPC step 1b and MX-7777 circuit breaker set to ON.
If the MCX-7777 circuit breaker stays in the ON position, this part of EPC step 1 (1b) is good. Step 1c
would be checked.
(3) See Figure 23. EPC Step 1c checks the AM-1780 MAIN PWR switch function when set
at INT ONLY.