No Display - True Fitness 350-750 Service Manual

Symptom
No power at the 110

NO DISPLAY

VAC outlet.
No power to the
treadmill.
No power to the
control panel.
Support Services 800-883-8783
Page 12
Probable Cause Corrective Action
•
Check home circuit breaker. Reset as
necessary.
•
Test for 110 VAC at outlet.
•
Identify if outlet is a GFI.
Note: Some brands of GFI
outlets are too sensitive for
treadmill use. Call the help
line if encountering GFI
issues.
--------
•
Check for AC light on PWM.
(See diagram pages 23-30)
•
Check for 110 VAC at power cord.
Replace if no power.
•
If Yes- Check for 110 VAC at tread
power switch. Replace if no power.
•
If Yes-Check for 110 VAC at tread
circuit breaker. Replace/ reset if
necessary.
•
If Yes- Check for 110 VAC at PWM
across AC1 & AC2.
•
If Yes- Replace PWM.
--------
•
Check status LED +11 VDC on PWM
(See diagram pages 23-30). If not
remove fuses and check continuity as
replace as needed.
•
If Yes- Check wire harness connections
at PWM and Control Panel. Reconnect
as needed.
•
If Yes- Check voltage on harness at
panel. Refer to wiring diagram for your
machine type in wiring diagram section.
If voltage is present– replace panel and
recalibrate (page 16). If voltage is not
present check voltage at PWM. If
voltage is present at PWM replace
pedestal wire harness. If 0 VDC
replace PWM and recalibrate (page 16).
Mon-Fri 8:30am-5:00pm Central Time Zone
Recommended Tools
Allen Key set.
Phillips head
screwdriver.
Multi-meter.
Note:
All trouble
shooting should
be performed in
calibration
mode.
Page 16
Fax: 636-272-7148