Landice 8700 manual Testing Components, VDC Power Supply

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Testing Components

12 VDC POWER SUPPLY

Measure across the input terminals for AC line voltage (120/220VAC). Measure across the output wires for DC voltage (9.0VDC to 18.0VDC is acceptable). If you confirm proper input voltage (AC) and have no output voltage (DC) the DC power supply must be replaced.

Drive Motor:

Generation Test – all Landice drive motors (110 & 220) are direct current or DC. A DC drive motor can produce (generate) a DC voltage when it’s manually rotated. The DC output is linear to the speed the motor is rotated. To perform the “Generation Test” follow these steps:

1.Un-plug treadmill from wall outlet.

2.Disconnect drive motor from motor control board.

3.Connect DMM (Digital Multi-Meter) to the drive motor wires.

Note: Your DMM should be set on Volts DC (VDC)

Motor plus (+)	= Red test lead from DMM
Motor minus(-)	= Black test lead DMM

4.Position your DMM so you can read it while standing on the treadbelt.

5.Start to manual push / run on the treadbelt.

Note: You are spinning the drive motor manually. The faster you spin the motor, the higher the output of DC voltage will register on your DMM.

110 VAC treadmills use a 90 VDC drive motor. For every mile per hour you spin the drive motor you will generate approximately 10 VDC output. So, at 1 mph you will measure 10VDC +/- and at 9mph you will measure 90VDC +/-.

220 VAC treadmills use a 180 VDC drive motor (double the input voltage, double the size of the drive motor). For every mile per hour (mph) you spin the drive motor you will generate approximately 20 VDC output. So, at 1.0mph you will measure 20 VDC +/- and at 9.0mph you will measure 180 VDC +/-.

If you measure very low DC voltage or zero DC voltage, first check the drive motor brushes for condition. Motor brushes are the leading cause for drive motor failure. If the motor brushes are worn below ¼” in length, replace them.

110	VAC / 90VDC	Motor Brush part#70222
220	VAC /180 VDC	Motor Brush part#70223

Alternate Test 1: Attach 9-volt battery to motor leads. There should be motor movement.

Alternate Test 2: Unplug Treadmill. Disconnect Drive Motor wires. Disconnect Drive Belt. Hold black and white wires together. Spin flywheel. There should be resistance when wires are connected.