Precor 9.31 Service Manual page 7

33. All of the LED's on the display will illuminate. If any LED on the display is not illuminated,
replace the upper PCA.
34. Press the SELECT or the RESET key to continue to the keyboard test.
35. The display will momentarily read KEYBOARD TEST.
36. An indicator will be displayed for each key on the keyboard. When a key is pressed the
indicator will change. Press every key on the keyboard to ensure that all keys are
functioning normally.
37. Press and hold the RESET or SELECT key to continue to the heart rate test.
38. If the 9.31 is not equipped with the heart rate option, the message NO HR RECEIVER will
be displayed indicating that a heart rate receiver was not detected.
39. Create a heart rate signal using either a heart rate chest strap or test transmitter. The heart
rate LED will flash and the heart rate reading will be displayed. The SELECT key will allow
you to toggle between P - Polar filtering, U - unfiltered and F - filtered.
40. Press the RESET key to continue to the lift test.
41. The display will momentarily read LIFT TEST then A/D.
42. The lift A/D (analog to digital) number will be displayed. The lift A/D number is related to the
current lift position and represents the lift potentiometer reading. The A/D number will be in
the range of 0 to 255.
43. The lift may be operated using the INCLINE keys. The lift A/D number will change
accordingly.
44. The A/D reading will be used later in this service manual to calibrate the lift.
45. Press the RESET key to proceed to the belt speed test. Press SELECT to display the
percent of incline.
46. The display will momentarily read BELT SPEED TEST then MPH. The display then show
the actual operating speed.
47. The speed of the running belt is controlled by the SPEED keys during this test as it would be
in a normal operating mode.
48. The SELECT key will toggle between a MPH, POWERBITS and TIME display. TIME
indicates the test's elapsed time.
49. This test is valuable in diagnosing treadmill load conditions such as running bed and/or
running belt condition. As load is increased, the speed is kept at a constant value (as set via
the SPEED keys) and the current and power bits will vary proportionately to the load.
9.31, 9.33, 9.35 Treadmill
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