Trackmaster FVX325, Руководство по обслуживанию на месте

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TRACKMASTER
10-2
FVX, TMX Series Service Manual August, 2006
PC Directed Test Steps:
After the connections have been made between the test fixture and the PC, between the
dut and the test fixture, and between the dut and the PC, the PC software can be run by
test personnel.
Board Power Test
The PC requests that the voltage selection switch be moved to the 110V position. It then
commands the test fixture to apply 110VAC to the test set. After a warm-up time of not
less than 10 seconds, the DC voltage of the dut is measured, recorded and verified.
Test Grade
The PC directs the test fixture to exercise the elevation input providing a fixed number of
counts to the dut. The dut is then queried by the PC to verify that the number of counts
input was measured correctly by the dut.
A command to change the elevation position is sent to the dut and the elevation relay
inputs are tested for the presence of 110V in the up and down directions. The inputs from
the relays are tested for mutual exclusion to check for circuit shorts.
Test Belt
The PC applies an output to J2 pin 2 of the dut and after directing a command to the dut
to start the belt, measures the input from the belt enable optocoupler.
While the belt is running virtually, the test fixture supplies an input to the speed sensor
circuit on the dut and the PC verifies the measured speed by querying the dut directly.
Three different speed setpoints are tested and after each new setting is applied, the speed
reference pwm is measured, recorded and verified.
Test EEProm
The PC directs a command to the dut do a Read/Write test on the eeprom and verifies the
contents of the eeprom between successive powerups to verify power down data
retention.
Test Voltage Selection Switch
The person directing the test is asked to move the voltage selection switch to the
230VAC position, and the DC output voltage measured by the test fixture is again
recorded and verified.
Communication Test
Communication is inherently verified in that most test steps require communication with
the device under test to exercise the outputs and read the inputs.