61
SYMPTOM
Upper display board fails to light when START is pressed.
4.1
Is the AC PWR light on the relay board lit?
YES
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| 1.Plug a lamp into the wall outlet to confirm |
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| it is live. |
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| 2.Check line cord condition and connections. |
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| NO |
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| 3.Unplug treadmill and use a multimeter to |
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| check the fuse. If it is bad, swap with a |
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| spare |
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| 4.Plug in treadmill and use a multimeter to |
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| check for 120VAC across HOT and NEUT |
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| terminals of relay board. |
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4.2
Is the VDC light on the relay board lit?
YES
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| 1.Check all connections to black, 9VDC power supply. |
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| 2.Confirm the black wire with a dashed white line (or a |
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| ribbed edge) is plugged into +VDC terminal on the |
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| relay board. |
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NO |
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| 3.Confirm the solid black wire is plugged into SGND |
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| terminal on the relay board. |
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| 4.Replace 9VDC power supply. Part # 5302 |
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4.3
1.Unplug the 12 wire connector from the relay board and inspect all wires for a loose fit or pushed pin. Be sure harness is routed under the elevation motor and secured with a plastic wire
2.Unplug the 14 wire connector from the upper dsiplay board and inspect all wires for a loose fit or pushed pin.Check for 9 to 14VDC from black to green wires.
Are harness wire connections intact?
4.4
YES
Replace the upper display board. Part#
NO
Repair upper harness or replace upper harness. Part # 72011
