Polar Board (Pcb-005) - Life Fitness Integrity SL Service Manual

Polar Board (PCB-005)

Theory of Operation:
The Polar board is an off-the-shelf RE-07 telemetry receiver board from Polar, Inc. It receives HR pulses from the user's
telemetry chest strap. The pulses may be coded or uncoded depending on the type of telemetry strap. If coded, the
chest strap must first be within ~25" of the Polar RE-07 receiver (which is centered directly behind the console's
reading rack). Once the HR is displayed, the code is locked in and the user's chest strap or simulator can be moved
back to ~35". Uncoded chest straps have the same reception range (~35").
Functions/Connectors:
Connector to Main Contains +3.3 VDC and Ground from the Main board and telemetry pulse signal to Main
Board board.
Troubleshooting tips:
• Make sure that the connectors are properly seated at the Main board and at the Polar board. Make sure the cable is
not pinched or severed (try a different, known good, cable).
• In a workout, press the right toggle button so that the Heart Rate LED is lit. Set a Polar simulator to between 60 -
200 bpm and place it in the reading rack. Observe the HR value changes up or down as the HR setting on the
simulator is changed.
• Polar reception range is significantly reduced by any metal in the reading rack. Be sure there are no metal devices
(cell phone, tablet, iPod, Kindle, etc) in the center of the reading rack. Remove device entirely to see if it is
interfering. If user desires to use the device and Polar simultaneously, they must move the device to a cup holder or
off to the side of the reading rack.
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