LLZ 421
Operation and Maintenance Maintenance
ILS 420
6−13Ed. 01.10
SOAC
− Set the desired voltage carefully at the potentiometer on the front panel with the aid of a calibration
screwdriver. It should be possible to obtain the value specified in the table in 6.3.3.1 to within a
tolerance of ±0.2 V.
− Switch off the adjusted ACC unit.
− Switch on the next ACC unit and adjust it in the same way.
− Adjust all installed ACC units in the same way.
When all units have been set in this way measurements should be performed as follows:
− Disconnect the battery.
− Perform measurement between +BAT and −BAT on the BCPS terminal plate using a digital volt-
meter:
First measurement : Transmitter off, BCPS without load
Second measurement : Transmitter on, BCPS with load
The values should not deviate from the set value by more than ±1 %. If the deviation is greater, the
relevant module can be determined by deactivating the power units individually and observing the
voltage change. The voltage of this unit must then be corrected upwards or downwards. The BCPS
is then ready for service.
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