Focus airflow on the primary transformer, power transistor heatsinks, and main circuit board.
Connect the DMM directly across the power supply terminals (creating a safe short circuit managed by the current limiter).
: Specific models are required to simulate aircraft loads during bench testing. ps-855b maintenance manual
Comprehensive Guide to the PS-855B Maintenance Manual: Ensuring Emergency Power Reliability
Locate the current calibration trimpot on the internal PCB (labeled or VR2 ). Focus airflow on the primary transformer, power transistor
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Tighten electrical terminal connections to prevent overheating. Annual Maintenance Tasks Oil Change: Replace the hydraulic oil completely. A: L3 Harris Service Letter SL-170 (Rev
A: L3 Harris Service Letter SL-170 (Rev. K) specifies that the condition of the batteries must be checked every 3 to 6 months using the periodic check procedure outlined in the bulletin.
Switch your DMM to 10A DC current mode and bridge the leads directly across the power supply output terminals (creating a safe short-circuit).