It is very important that the Operator and maintenance personnel ensure that the
environment around the processor is such that the airflow through and around the unit is not
restricted or the air temperature is above requirements (table 1-2).
Noisy Blower Fan. In the event that the units blower fan becomes noisy, the
processor is removed and replaced with an operational spare (para 4-14).
PWR ON/RESET Indicator Not Lit. If the PWR ON/RESET indicator won't light,
replace the defective processor with an operational spare (para 4-14).
BATT Indicator Not Lit. If the BAIT indicator on a semiconductor-based processor
won't light and the PWR ON/RESET is lit, the repair activity is beyond the scope of this
manual. Replace the defective processor with an operational spare (para 4-14).
The ETM indicator can be checked by
observing the movement of the flag between
the first and second digits.
f. Defective ETM Indicator. A daily visual inspection of the Elapsed Time Meter
(ETM) will show if the meter is not functioning properly. When the meter is not operating
properly, replace the processor with an operative spare unit (para 4-14).
g. Program Won't Load. Failure of the program to load may be caused by a number
of things. The most probable cause is in the loading itself (i. e., improper address,
improper/incomplete equipment configuration, etc.). Refer to the system manual for proper
loading instructions. Another probable cause is the processor itself. If the cause is the
processor, replace the processor with a spare operative unit (para 4-14).
-- Processor Does Not Accept Data. Replace the defective processor with an
i. Processor Does Not Output Data. Replace the defective processor with an
j. Processor Keeps Blowing Fuses. Replace the processor with an operational spare