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Precor 905e Service Manual

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See also: Owner's Manual
905E, 9.1, 9.10 Treadmills
905e, 9.1, 9.10 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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Summary of Contents for Precor 905e

  • Page 1 905e, 9.1, 9.10 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

    Section Nine, Service Bulletins and Engineering Change Notices. If you receive Service Bulletins or Engineering Change Notices about 905e, 9.1 and 9.10 Treadmills, place them in this section. General Information For the latest exploded view, part number and part pricing information, visit the Precor dealer website at “www.precor.com/Dealer”.

  • Page 3: Technical Specifications

    Running surface: 51 inches by 17 inches Motor: 1.5 hp continuous duty DC 905e Treadmills (Software Version 1.4 or Less) Speed: 0.3 to 6 mph in 2 mph increments 905e Treadmills (Software Version Greater Than 1.4) 0.5 to 8 mph in 2 mph increments 9.1 Treadmills...

  • Page 4: Procedure 2.1 - 905E, 9.1 And 9.10 Calibration Mode

    905E, 9.1, 9.10 Treadmills Procedure 2.1 - 905e, 9.1 and 9.10 Calibration Mode Placing the 905e, 9.1 and 9.10 Treadmills in Calibration Mode causes the software to perform the following operations: Display the PROM version number; Check the LED’s mounted on the upper PCA; and Display the potentiometer increment number.
  • Page 5 905E, 9.1, 9.10 Treadmills 9.1 Electronic Console 9.10 Electronic Console Page 5...

  • Page 6: Procedure 2.2 - Displaying The Odometer

    This procedure allows you to display the number of miles logged on the treadmill. Total miles logged on the treadmill is different from workout time. Workout time is displayed as described in the owners manuals provided with the 905e, 9.1 and 9.10 Treadmills. Procedure Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker.

  • Page 7: Procedure 2.3 - Selecting United States Standard Or Metric Units

    905E, 9.1, 9.10 Treadmills Procedure 2.3 - Selecting United States Standard or Metric Units Selecting United States standard units causes information to be displayed in feet and pounds. Information is displayed in meters and kilograms if metric units are selected. After you have selected a measurement standard, the software compiles and records workout information in the units of the measurement standard selected.

  • Page 8: Procedure 2.4 - Determining Software Version Numbers

    905E, 9.1, 9.10 Treadmills Procedure 2.4 - Determining Software Version Numbers Software version numbers are invaluable for tracking and identifying problems and staying aware of changes to the operation and features of the product. Procedure Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker.
  • Page 9 905E, 9.1, 9.10 Treadmills Procedure 2.5 - Checking the LED’s Mounted on the Upper Procedure Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker. With the Enter Your Weight banner scrolling, press and hold the SPEED key, SPEED key, STOP, and SCAN/ENTER keys simultaneously.

  • Page 10: Procedure 2.6 - Placing The 905E, 9.1 And 9.10 Treadmills In Power Bit Mode

    905E, 9.1, 9.10 Treadmills Procedure 2.6 - Placing the 905e, 9.1 and 9.10 Treadmills in Power Bit Mode Procedure Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker. With the Enter Your Weight banner scrolling, press and hold the SPEED key, SPEED key, STOP and SCAN/ENTER keys simultaneously.

  • Page 11: 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 12 905E, 9.1, 9.10 Treadmills 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 13: Procedure 4.1 - Calibrating The Lift Assembly

    905E, 9.1, 9.10 Treadmills Procedure 4.1 - Calibrating the Lift Assembly Procedure Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker. Turn the crank handle in the negative direction until the crank handle will no longer move without using excessive force.
  • Page 14 905E, 9.1, 9.10 Treadmills 10. Loosen the screw that secures the crank handle to the electronic console. Remove the crank handle and set it aside. 11. Remove the bolts and washers that secure the electronic console to the upper handrail clamp.
  • Page 15 905E, 9.1, 9.10 Treadmills Diagram 4.2 - Upper Lift Column Assembly Page 15...

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

    905E, 9.1, 9.10 Treadmills Procedure 5.1 - Troubleshooting the Keypad and Upper PCA Set the circuit breaker in the “off” position. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One of the Residential Treadmill Service Manual.
  • Page 17 905E, 9.1, 9.10 Treadmills If the voltage readings match those listed in Tables 5.1 and 5.2 and one or more keys do not function, replace the upper PCA. If the voltage readings in Table 5.1 are incorrect, disconnect the keypad cable from the key pad connector and repeat the voltage measurements in 5.1.

  • Page 18: Procedure 5.2 - Troubleshooting The External A.c. Power Source

    Procedure 5.2 - 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 19 905E, 9.1, 9.10 Treadmills 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 20: Procedure 6.1 - Replacing The Electronic Console And Crank Handle, Upper Pca Or Keypad

    Handle, Upper PCA or Keypad Wear an anti-static device (such as a wrist strap) when you perform this procedure. Anti-static kits can be ordered from Precor Customer Service (Precor part number 20024-101). Removing the Electronic Console Place the magnetic safety key in the OFF position, then unplug the treadmill from the wall outlet.
  • Page 21 The electronics housing assembly consists of the electronics housing, magnet keeper, ACTIVATE label, OFF label, control panel spacer, and crank housing label. These components are shipped from Precor as a single unit Diagram 6.2 - Disconnecting the Ribbon Cable Attach the wrist strap to your arm, then connect the ground lead of the wrist strap to the treadmill frame.
  • Page 22 Notice the position of the ribbon cable connector on the upper PCA. When you replace the upper PCA, mount it in the same manner. 11. Set aside the defective upper PCA for eventual shipment to Precor Customer Service. Note When you package the upper PCA, document the problem as described in Procedure 2.7 of this appendix.
  • Page 23 905E, 9.1, 9.10 Treadmills THEN . . . OTHERWISE . . . Continue with the next step. Carefully connect the keypad (f) to the upper PCA; then skip to Step 24. Removing the Display Label and Keypad The keypad and display label are attached to the electronics housing assembly with adhesive. If the display label is removed, a new display label and keypad must be pressed to the electronics housing assembly.

  • Page 24: Procedure 6.2 - Replacing The Prom

    PCA. Wear an anti-static device (such as a wrist strap) when you perform this procedure. Anti-static kits can be ordered from Precor Customer Service (Precor part number 20024-101). Dismounting the Upper PCA Place the magnetic safety key in the OFF position, then unplug the treadmill from the wall outlet.
  • Page 25 905E, 9.1, 9.10 Treadmills Note: The software version number is labeled on the PROM (U3). 10. Position the upper PCA at its mounting location, then replace the screws that secure the upper PCA to the electronics housing assembly. 11. Carefully connect the keypad to the upper PCA.
  • Page 26 905E, 9.1, 9.10 Treadmills THEN . . . OTHERWISE . . . Replace the upper PCA as described Continue with the next step. in Procedure 6.1 of this appendix. Re-Installing the Upper PCA 18. Replace the screws that secure the upper electronic chassis to the electronics housing assembly.
  • Page 27 905E, 9.1, 9.10 Treadmills Procedure 6.3 - Replacing the Ribbon Cable on 905e, 9.1 Treadmills Made Before September 14, 1994 Removing and replacing the ribbon cable is a procedure that takes a significant amount of time to accomplish. Before performing this procedure, ensure that the ribbon cable is defective by connecting a spare ribbon cable to the upper PCA and lower PCA as described in Procedure 4.1...
  • Page 28 905E, 9.1, 9.10 Treadmills this occurs, use the flat-head screwdriver and rubber mallet to force the collar from its mounting position. 13. Pull the lift jack from the lift column and set it aside. Note: If necessary, hammer the lift jack shaft to loosen the lift jack from its mounting position.
  • Page 29 905E, 9.1, 9.10 Treadmills Note: If the ribbon cable does not lay in the cable channel along the entire length of the lift column, the cable may be caught and nicked or crimped by the floating bearings on the lift jack.
  • Page 30 905E, 9.1, 9.10 Treadmills Diagram 6.6 Exploded view of Lift Assembly 32. Calibrate the lift assembly as described in Procedure 4.1 of this appendix. 33. Check the operation of the treadmill as described in Section Three of this appendix. Page 30...
  • Page 31 905E, 9.1, 9.10 Treadmills Procedure 6.4 - Replacing the Ribbon Cable on 9.1, 9.10 Treadmills Made After September 14, 1994 Before you perform this procedure, ensure that the ribbon cable is defective by connecting a spare ribbon cable to the upper PCA and lower PCA as described in Procedure 4.1 in the Residential Treadmill Service Manual.
  • Page 32 905E, 9.1, 9.10 Treadmills 13. Slide the connector and ribbon cable through the slot on the upper handrail clamp. Hold the potentiometer cable away from the slot as you slide the ribbon cable into place. 14. Hold the electronic console over the lift column. Connect the ribbon cable to the upper PCA.
  • Page 33 905E, 9.1, 9.10 Treadmills 18. Attach the lift column trim by following the steps listed below: Position the trim so that the notched end points up. Insert the base of the trim through the opening in the hood. Raise the trim until the notched end of the trim touches the underside of the upper handrail clamp.

  • Page 34: Procedure 6.5 - Replacing The Lower Pca

    905E, 9.1, 9.10 Treadmills Procedure 6.5 - Replacing the Lower PCA Removing the Lower PCA Place the magnetic safety key in the ACTIVATE position, then turn on the treadmill with the circuit breaker. Incline the treadmill to its maximum elevation.
  • Page 35 905E, 9.1, 9.10 Treadmills 12. Inspect and adjust the target gap as described in Procedure 3.4 of the Residential Treadmill Service Manual. 13. Tighten the bolts and nuts that secure the lower PCA to the motor chassis. 14. Attach the ribbon cable to the lower PCA.

  • Page 36: Procedure 6.6 - Replacing The Lift Jack And Lift Column

    905E, 9.1, 9.10 Treadmills Procedure 6.6 - Replacing the Lift Jack and Lift Column Many steps include letters in parentheses after component references. These letters correlate to the call outs in Diagram 9.1-13. Diagram 9.1-13 is an exploded view of the 9.1 Treadmill lift assembly hardware.
  • Page 37 905E, 9.1, 9.10 Treadmills Note Place a drop cloth under the treadmill to protect the flooring and to ensure that the treadmill handrail is not scratched or damaged. Diagram 6.8 - Exploded View of the Lift Assembly Page 37...
  • Page 38 14. Remove the ribbon cable using the appropriate procedure listed in Table 6.2. Table 6.2 - Replacing the Ribbon Cable Procedures Procedure 6.3 905e Treadmills and 9.1 Treadmills Made Before September 14, 1994 Procedure 6.4 9.10 Treadmills and 9.1 Treadmills Made After September 14, 1994 15.
  • Page 39 905E, 9.1, 9.10 Treadmills 17. Slide the lift column through the base of the treadmill frame. 18. Position the new lift column at its mounting location. 19. Replace the bolts and washers that secure the lift column to the treadmill frame.

  • Page 40: Procedure 6.7 - Replacing The Lift Potentiometer

    905E, 9.1, 9.10 Treadmills Procedure 6.7 - Replacing the Lift Potentiometer Removing the Lift Potentiometer Place the magnetic safety key in the OFF position, then unplug the treadmill from the wall outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One of the Residential Treadmill Service Manual Remove the electronic console and crank handle as described in Procedure 6.1 of this...
  • Page 41 905E, 9.1, 9.10 Treadmills 13. Using the soldering iron, melt a small piece of solder onto the junction formed by each wire and potentiometer terminal. Slide a piece of shrinkable tubing over the soldered connection. 14. Using a new cable tie, secure the three potentiometer wires to the potentiometer bracket.

  • Page 42: Procedure 6.8 - Replacing The Handrails

    905E, 9.1, 9.10 Treadmills Procedure 6.8 - Replacing the Handrails Removing the Handrails Place the magnetic safety key in the OFF position, then unplug the treadmill from the wall outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One of the Residential Treadmill Service Manual.
  • Page 43 14. Tighten the screws that secure the handrail to the upper handrail clamp. 15. Plug the power cord into the wall outlet. Use the item numbers listed in Table 9.1-5 and the exploded view diagram shown in Diagram 9.1-16 to locate and identify 905e Treadmill components. Page 43...
  • Page 44 905E, 9.1, 9.10 Treadmills Diagram 7.1 - Wiring Diagram, 905e, 9.1, 9.10 Page 44...

  • Page 45: Diagram 7.2 - Block Diagram 905E, 9.1, 9.10 Treadmills

    905E, 9.1, 9.10 Treadmills Diagram 7.2 - Block Diagram 905e, 9.1, 9.10 Treadmills Page 45...

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9.10M 9.1

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