No Resistance - True Fitness 750E Service Manual

Symptom

NO RESISTANCE

750E, 750EA
Page 4 Support Services 800-883-8783
Probable Cause
Console Set
Defective Cables
Power Resistance
Corrective Action
•
Remove console bolts to access 7-pin
connector. Do not disconnect console
set.
•
Enter DA (resistance) test mode.
(Page 3).
•
Press + key to force .7 VDC out of
panel.
•
Set meter for DC Volts. Measure
between #2 pin and #4 pin at 7- pin
connector.
•
Is .7 VDC present? No- replace console
set. If present, continue on.
--------
•
Remove right mast cover and handlebar.
•
Measure between the #2and #4 wires at
the 7 –pin connector on the lower board.
•
Is .7 VDC present? No- replace cable
for console. If present, continue on.
--------
•
DO NOT PEDAL.
•
Set meter for resistance. Disconnect 3-
pin connector at the lower control board.
Measure resistance between #1 pin and
#3 pin.
•
Resistance should be 10 ohms, +/- 1
ohm.
•
If less than 10 Ohms- replace power
resistance. If resistance checks OK,
continue on.
--------
•
DO NOT PEDAL.
•
Remove main body cover, set meter for
continuity.
•
Disconnect brake cable from brake and
lower board.
•
Check continuity of all wires in cable.
•
Check for cross continuity- this would
indicate multiple shorts in the cable.
•
No continuity? Replace Brake cable.
•
Yes continuity? Replace lower board.
Mon-Fri 8:30am-5:00pm Central Time Zone
Recommended Tools
Note:
You must pedal at least
30 RPM when
performing any voltage
test. You may require the
assistance of another
person when performing
voltage checks.
Multi-meter
Fax: 636-272-7148