Precor 9.41s User Manual
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Precor 9.41s User Manual

Precor 9.41s User Manual

Treadmill
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9.41S, 9.41Si Treadmill
9.41s, 9.41si Treadmill
Warning: This service manual is for use by Precor trained service providers only.
If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product;
Call your dealer for service.
This document contains information required to perform the majority of troubleshooting, and
replacement procedures required to repair and maintain this product.
This document contains general product information, software diagnostic procedures (when
available), preventative maintenance procedures, inspection and adjustment procedures,
troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.
To move directly to a procedure, click the appropriate procedure in the bookmark section to the
left of this page. You may "drag" the separator bar between this page and the bookmark section
to change the size of the page being viewed.
© 2003 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
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  • Page 1 9.41s, 9.41si Treadmill Warning: This service manual is for use by Precor trained service providers only. If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product; Call your dealer for service. This document contains information required to perform the majority of troubleshooting, and replacement procedures required to repair and maintain this product.

  • Page 2: Section One - Things You Should Know

    About This Appendix Section One, Things You Should Know. This section includes technical specifications and a procedure matrix. Read this section, as well as the 9.41S or 9.41Si Treadmill Owner’s Manual, before you perform the maintenance procedures in this manual.

  • Page 3: Technical Specifications

    Height: 50 inches (127 cm) Running surface: 53 inches by 18 inches (135 cm by 46 cm) Motor: 1.7 hp. continuous duty (9.41S) Motor 2.0 hp. continuous duty (9.41Si) Speed: 0.5 to 10 m.p.h. (0.8 to 16 kph) 10 m.p.h. is equivalent to a 6 minute mile...

  • Page 4: Procedure 2.1 - 9.41S Diagnostic Program (Units Built Before July 21, 1997)

    9.41S, 9.41Si Treadmill Procedure 2.1 - 9.41S Diagnostic Program (Units Built Before July 21, 1997) The M9.41S diagnostic program cycles through the following modes: Software Version Mode. Displays the PROM version number. LED Mode. Illuminates each of the LEDs mounted on the upper PCA.
  • Page 5 SPEED keys are pressed. Press STOP to return to the Enter Your Weight banner. Turn off the treadmill with the circuit breaker, then unplug the treadmill from the wall outlet. Diagram 2.1 - 9.41S Display Page 5...
  • Page 6 2, etc. (see Diagram 2.1) or on a 9.41Si INCLINE would be key 1, INCLINE would be key 2, etc. (see Diagram 2.2). Placing the 9.41S or 9.41Si Treadmill in diagnostic mode causes the software to perform the following operations: Test the LED’s mounted on the upper PCA;...
  • Page 7 9.41S, 9.41Si Treadmill Note: When the running belt is started, the number of power bits will be displayed. Power bits represent the amount of power applied to the drive motor. Power bits are product of selected speed and applied load.

  • Page 8: Procedure 2.3 - Displaying The Odometer (Units Built Before July 21, 1997)

    9.41S, 9.41Si Treadmill Procedure 2.3 - Displaying the Odometer (Units Built Before July 21, 1997) This procedure allows you to display the number of miles logged on the treadmill. Procedure Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.

  • Page 9: Procedure 2.4 - Displaying The Odometer (Units Built After July 20, 1997)

    9.41S, 9.41Si Treadmill Procedure 2.4 - Displaying the Odometer (Units Built After July 20, 1997) The diagnostic program used prior to July 21, 1997 and the diagnostic program used after July 20, 1997 are essentially the same except that the key strokes used to access the programs are different.

  • Page 10: Procedure 2.5 - Selecting U. S. Standard Or Metric Units (Units Built Before July 21, 1997)

    9.41S, 9.41Si Treadmill Procedure 2.5 - Selecting U. S. Standard or Metric Units (Units Built Before July 21, 1997) Selecting United States standard units causes information to be displayed in feet, miles and pounds. Information is displayed in meters, kilometers and kilograms if metric units are selected.

  • Page 11: Procedure 2.6 - Selecting United States Standard Or Metric Units (Units Built After July 20, 1997)

    9.41S, 9.41Si Treadmill Procedure 2.6 - Selecting United States Standard or Metric Units (Units Built After July 20, 1997) The diagnostic program used prior to July 21, 1997 and the diagnostic program used after July 20, 1997 are essentially the same except that the key strokes used to access the programs are different.
  • Page 12 9.41S, 9.41Si Treadmill Note: When the treadmill is turned off or unplugged it will remember the last measurement standard selected. Page 12...

  • Page 13: Procedure 2.7 - Documenting Software Problems

    When a problem is found with either the PROM or upper or lower PCA’s, record the information listed below. If you isolated the problem to either the PROM, upper PCA, or lower PCA, include the information with the malfunctioning PROM or PCA when you ship it to Precor Customer Service.
  • Page 14 9.41S, 9.41Si Treadmill Section Three - Checking Treadmill Operation This section provides you with a quick method of checking treadmill operation. Check treadmill operation at the end of a maintenance procedure and when it is necessary to ensure that the treadmill is operating properly.

  • Page 15: Procedure 4.1 - Calibrating The Lift Motor

    If you are servicing a 9.41S treadmill built before April 1, 1996, use the INCLINE keys to set the Calibration Number to 20. Set the Calibration Number to 22 if you are servicing a 9.41S treadmill built after April 1, 1996 or a 9.41Si treadmill.

  • Page 16: Procedure 5.1 - Troubleshooting The Keypad And Upper Pca

    9.41S, 9.41Si Treadmill Procedure 5.1 - Troubleshooting the Keypad and Upper PCA If the function keys on the electronic console are unresponsive, the problem may be either the upper PCA or keypad. This troubleshooting procedure gives you the information you need to determine which of these components is malfunctioning.
  • Page 17 9.41S, 9.41Si Treadmill Table 5.2. Voltage Test Points (Function Keys Pressed) Place the positive At the electronic The voltmeter should voltmeter lead on... console, press... read between... Pin 3 of J4 ENTER 0 Vdc and 500 mVdc Pin 4 of J4...

  • Page 18: Procedure 5.2 - Troubleshooting The Optional Heart Rate System

    System Note: The 9.41S and 9.41Si treadmills are not equipped with heart rate as standard equipment. Heart rate will be present only if the optional heart rate system has been installed. If the HEART RATE indicator does not blink with your heart beat when you perform Procedure 2.1, the problem may be either the heart rate receiver assembly or the chest strap assembly.
  • Page 19 There is no need to continue with this procedure. Hold the Heart Rate Test Transmitter (Precor part number 20045-101) near the display housing. If the HEART RATE indicator on the electronic console blinks with the LED on the Smart Rate Test Generator...

  • Page 20: Procedure 5.3 - Troubleshooting The Lift System

    9.41S, 9.41Si Treadmill Procedure 5.3 - Troubleshooting the Lift System System Description The lift system is powered by a 120 Vac lift motor that uses two independent motors windings, one operates the motor in an upward direction and one operates the motor in a downward direction.
  • Page 21 9.41S, 9.41Si Treadmill Remove the P2 connector from the lower board. Using an ohmmeter, measure between terminals 1 and 3 of P2, between terminals 1 and 2 of P2 (white and red) and between terminals 2 and 3 of P2 (white and black). The measurements should be approximately 14.5Ω, 14.5Ω...

  • Page 22: Procedure 5.4 - Troubleshooting The External A.c. Power Source

    Procedure 5.4 - Troubleshooting the External A.C. Power Source It is extremely important that any Precor treadmill be connected to and operated on a dedicated 20 amp A.C. circuit. A 20 amp dedicated circuit is defined as: a circuit fed by a 20 amp circuit breaker that feeds a single load.
  • Page 23 9.41S, 9.41Si Treadmill The circuit breaker correctly feeds a single A.C. outlet but the neutral is common between several A.C. outlets. The common neutral lead must be removed from treadmill’s A.C. outlet and a new neutral lead from the treadmill’s A.C. outlet to the A.C. neutral distribution bar must be added.

  • Page 24: Procedure 6.1 - Replacing The Target Disk And Fan

    9.41S, 9.41Si Treadmill Procedure 6.1 - Replacing the Target Disk and Fan WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood. Removing the Target Disk Remove the hood. Remove the retaining ring from the motor shaft.

  • Page 25: Procedure 6.2 - Replacing The Speed Sensor

    9.41S, 9.41Si Treadmill Procedure 6.2 - Replacing the Speed Sensor WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood. Removing the Speed Sensor Remove the hood. Disconnect the speed sensor cable from the lower PCA.

  • Page 26: Procedure 6.3 - Replacing The Lift Platform

    9.41S, 9.41Si Treadmill Procedure 6.3 - Replacing the Lift Platform WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood. Removing the Lift Platform Remove the hood. Note: To avoid scratching or marring the treadmill, put a drop cloth underneath the treadmill when you perform Step 2.

  • Page 27: Procedure 6.4 - Replacing The Lift Motor

    Remove the bolt and nut that hold the top of the lift motor to the treadmill frame. Remove the bolt and nut that secure the lift tube to the lift platform. Set aside the lift motor. Diagram 6.1 - 9.41S, 9.41Si Lift Motor Page 27...
  • Page 28 9.41S, 9.41Si Treadmill Replacing the Lift Motor With the treadmill still on its side, line up the mounting holes at the top of the lift motor with the lift motor mounting holes on the treadmill frame. While an assistant holds the lift motor in place, position the bolt through the top of the lift motor and the treadmill frame.

  • Page 29: Procedure 6.5 - Replacing The Prom

    9.41S, 9.41Si Treadmill Procedure 6.5 - Replacing the PROM Anti-static kits (part number 20024-101) can be ordered from Precor. The PROM and the associated printed circuit assembly (PCA) are static sensitive. Anti- static devices must be used and all anti-static precautions must be followed during this procedure.

  • Page 30: Wiring Diagram 7.1 - 9.41S And 9.41Si

    9.41S, 9.41Si Treadmill Wiring Diagram 7.1 - 9.41S and 9.41Si Page 30...

  • Page 31: Block Diagram 7.2 - 9.41S And 9.41S

    9.41S, 9.41Si Treadmill Block Diagram 7.2 - 9.41S and 9.41S Page 31...

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9.41si

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