Irregular Or No Display - True Fitness 500U Service Manual

Symptom
IRREGULAR OR
NO DISPLAY
Control Panel
600R, 600U
Control Board
Cables
AC Voltage Output
Generator Output
Cable
Page 8 Support Services 800-883-8783
Probable Cause Corrective Action
•
Probe leads between pin 1 and 2 of 5PB.
(Page 19-20)
•
Pedal unit up to at least 30 RPM.
•
Is voltage 5 VDC?
•
If not 5 VDC – replace Control Panel.
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•
Disconnect 6PG from 6PH.
•
Pedal.
•
Check DC voltage between pins 2 and 3
for 5 VDC.
•
No 5 VDC? – Replace Control Board.
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•
Perform continuity checks on all upper
and lower cables.
•
Replace defective cables
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•
Check for AC Voltage between pins 1
and 2 of 3PB, and pins 2 and 3 of 3PB.
•
Is there AC voltage output in both
places?
•
If yes – replace Control Board.
•
Check for AC Voltage between pins 1
and 2 of 3PD, and pins 2 and 3 of 3PD.
•
Is there AC voltage output in both
places?
•
If no – replace Generator.
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•
Perform a continuity check on the
generator output cable.
•
If no continuity – replace cable
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Recommended Tools
Multi-meter
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