Model 8210/8250 Maintenance Manual Section 8. Theory of Operation
Truck Starting
Publication:1146945/001, Revised: 25 Sep 2018 8-5
Truck Starting
To start the truck, the battery is plugged in.
This supplies battery positive and negative to
the Traction Amplifier (TA) at the TA B– and TA
B+ connections. This allows the internal
capacitors of the TA to precharge. This voltage
is also used by the TA at J1-1 to power the
internal circuitry of the TA. The TA verifies the
correct voltage is at the capacitors prior to
closing the main contactor (MPC). With the
Main ON/OFF switch in the ON position, the
display lights. If the optional keypad is present
on the control handle, enter the PIN key code
and then press the green ON (|) key.
Property of American Airlines
To Next Page