Life Fitness 3500 Service Manual
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Life Fitness 3500 Service Manual

Life Fitness 3500 Service Manual

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Model 3500 Treadmill
SERVICE MANUAL
After Market Services

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Summary of Contents for Life Fitness 3500

  • Page 1 NET PRICE: Model 3500 Treadmill SERVICE MANUAL After Market Services...
  • Page 2 FCC Warning - Possible Radio/Television Interference NOTE: This equipment has been tested and found to comply with the limits pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
  • Page 3 HOW TO USE THIS SERVICE MANUAL In the unlikely event that an operating problem may occur with your Life Fitness model 3500 aerobic trainer, this Service Manual will instruct and guide you on the quickest, most efficient manner in which to approach the situation.

  • Page 4: Table Of Contents

    Life Fitness Model 3500 Treadmill TABLE OF CONTENTS INTRODUCTION (How to use this Service Manual) TABLE OF CONTENTS SECTION I PAGE THEORY OF OPERATION TROUBLESHOOTING GUIDES NO POWER......................... 2 NOISY TREADMILL ...................... 3 STRIDING BELT......................4 UNIT RESETS RANDOMLY................... 5 DISPLAY DOES NOT ILLUMINATE OR RESPOND TO INPUT..........

  • Page 5: Theory Of Operation

    Treadmill. The Display Console provides all of the “Intelligence” within the Treadmill, controls the Information Displays, and monitors the Keypad and Safety Switches. It determines the Drive Motor and Lift Actuator actions to suit the chosen Life Fitness aerobic training program and it also accommodates the optional Heart Rate Receiver.

  • Page 6: No Power

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE NO POWER Symptom: Malfunction Probable Cause Corrective Action Turn unit On. No Power On/off switch Insufficient power source Plug treadmill into power source with proper electrical requirements. (See Operation Manual) Line cord improperly seated in Inspect power connection at outlet.

  • Page 7: Noisy Treadmill

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE NOISY TREADMILL Symptom: Malfunction Probable Cause Corrective Action Rubbing sound from Foreign objects may be stuck Inspect underneath Belt and Machine. Remove beneath machine under the machine any debris or accumulation. Rubbing sound from Striding Belt not tracking Adjust Striding Belt tracking.

  • Page 8: Striding Belt

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE STRIDING BELT Symptom: Corrective Action Malfunction Probable Cause Striding Belt will not move Insufficient power source Plug treadmill into power source with proper electrical requirements. (See Operation Manual) Faulty Control Board Replace Control Board...

  • Page 9: Unit Resets Randomly

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE UNIT RESETS RANDOMLY Symptom: Malfunction Probable Cause Corrective Action Unit Resets Randomly Insufficient Power Source Plug Treadmill into power source with proper electrical requirements. (See Operational Manual) Damaged Line Cord Replace Line Cord.

  • Page 10: Display Does Not Illuminate Or Respond To Input

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE DISPLAY DOES NOT ILLUMINATE OR RESPOND TO INPUT Symptom: Malfunction Probable Cause Corrective Action Display will not illuminate Insufficient power source. Plug Treadmill into power source with proper when machine is turned on.

  • Page 11: Unit Will Not Elevate

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE UNIT WILL NOT ELEVATE Symptom: Malfunction Probable Cause Corrective Action Unit will not elevate Line Cord is crossed over lifting Check position of Line Cord placement. assembly Faulty Lift Actuator Perform Lift Test (See Diagnostics).

  • Page 12: Error Display Messages

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE ERROR DISPLAY MESSAGES Symptom: Malfunction Probable Cause Corrective Action ERROR MESSAGES: Check all electrical connections. START Bad connection to Opto Speed (Occurs when the Striding Belt, Sensor upon start up, will speed up at a high rate) Adjust or replace Opto Speed Sensor.

  • Page 13: Heartrate Does Not Respond

    Life Fitness Model 3500 Treadmill TROUBLESHOOTING GUIDE HEARTRATE DOES NOT RESPOND Symptom: ( IF EQUIPPED WITH OPTIONAL HEART RATE KIT ) Malfunction Probable Cause Corrective Action Check all electrical connections. Heartrate system does not Heartrate cable not connected respond Secure connection at Console and Handlebar.
  • Page 14 Life Fitness Model 3500 Treadmill NOTES:...

  • Page 15: Diagnostic Tests

    Life Fitness Model 3500 Treadmill DIAGNOSTIC TESTS PURPOSE: This Section describes the test procedures for the Life Fitness 3500 Treadmill Display Console Board including the Heart Rate feature (operational only if equipped with the optional Heart Rate Kit Tray). SCOPE: Diagnostic procedures will test the Display Console Board as used in the final Treadmill assembly.
  • Page 16 Life Fitness Model 3500 Treadmill DIAGNOSTIC TESTS ( Continued ) THE SPEED DOWN KEY t IS USED FOR THE FOLLOWING TESTING INFORMATION: ⇒ CHECK THE DISPLAY/KEYPAD FUNCTIONS ⇒ REVIEW STATISTICS ⇒ IDENTIFY SOFTWARE VERSION USE THE ENTER KEY TO ADVANCE THROUGH THE TEST.
  • Page 17 Life Fitness Model 3500 Treadmill DIAGNOSTIC TESTS (Continued) THE INCLINE DOWN t KEY IS USED FOR THE FOLLOWING TESTING INFORMATION: ⇒ ELEVATION TEST/ HOME SWITCH ⇒ SPEED MODE OPERATION ⇒ HEARTRATE MODE OPERATION (IF EQUIPPED WITH OPTIONAL HEART RATE KIT) POWER UP THE UNIT WHILE HOLDING DOWN THE INCLINE DOWN t KEY.
  • Page 18 Lifestride Model 3500 Treadmill DIAGNOSTIC MODE ENTRY (Continued) SPEED MODE PRESS ANY SPEED KEY TO ENTER THE SPEED MODE. THE DISPLAY WILL PRESENT TWO NUMBERS. THE LEFT SIDE NUMBER REPRESENTS THE ACTUAL SPEED. THE RIGHT SIDE NUMBER REPRESENTS THE RELATIVE POWER APPLIED TO THE MOTOR. THE UNIT WILL SUPPLY A FIXED AMOUNT OF POWER TO THE DRIVE MOTOR IN THE SPEED MODE.

  • Page 19: How To

    Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE VENT COVER Tools Required: Phillips Screwdriver Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet. Step 2 Use a phillips screwdriver to remove the two SCREWS securing the sides of the VENT COVER to the MOTOR COVER.
  • Page 20 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE MOTOR COVER Tools Required: Phillips Screwdriver, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 21 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE DISPLAY CONSOLE Tools Required: Phillips Screwdriver Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet. Step 2 Remove the TRAY, if equipped with the optional HEART RATE kit. (See “How To...”).
  • Page 22 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE HANDLEBAR AND HANDRAILS Tools Required: Phillips Screwdriver, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 23 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE DECK AND STRIDING BELT Tools Required: Phillips Screwdriver, socket set, hex key wrench set IMPORTANT: THE DECK AND STRIDING BELT SHOULD ALWAYS BE REPLACED IN TANDEM. DO NOT REPLACE ONE WITHOUT THE OTHER.
  • Page 24 Life Fitness Model 3500 Treadmill How To... REMOVE AND REPLACE THE FRONT ROLLER ASSEMBLY Tools Required: Phillips screwdriver, socket set, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 25 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE REAR ROLLER Tools Required Socket and ratchet set, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 26 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE HEATSINK CONTROL BOARD ASSEMBLY Tools Required: Phillips Screwdriver, socket and ratchet set, hex key wrench set WARNING: FAILURE TO OBSERVE SAFE PROCEDURES WHEN SERVICING THIS UNIT COULD RESULT IN INJURY FROM ELECTRICAL SHOCK Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 27 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE HEATSINK CONTROL BOARD ASSEMBLY ( Continued ) Step 6 Use a socket wrench to loosen and remove the two SCREWS securing the GROUNDING WIRES to the HEATSINK CONTROL BOARD ASSEMBLY.
  • Page 28 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE DISPLAY WIRE HARNESS Tools Required: Phillips Screwdriver, socket and ratchet set, hex key wrench set WARNING: FAILURE TO OBSERVE SAFE PROCEDURES WHEN SERVICING THIS UNIT COULD RESULT IN INJURY FROM ELECTRICAL SHOCK Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 29 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE LIFT ACTUATOR ASSEMBLY Tools Required: Phillips screwdriver, standard screwdriver, hex key wrench set WARNING: FAILURE TO OBSERVE SAFE PROCEDURES WHEN SERVICING THIS UNIT COULD RESULT IN INJURY FROM ELECTRICAL SHOCK Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 30 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE DRIVE MOTOR BELT Tools Required: Phillips screwdriver, socket and ratchet set, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 31 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE DRIVE MOTOR BELT ( Continued ) Step 5 Lift the FRONT ROLLER ASSEMBLY from the EXTRUSION BRACKETS and position the FRONT ROLLER within the STRIDING BELT to allow for removal of the DRIVE MOTOR BELT from the DRIVE MOTOR and FRONT ROLLER PULLEYS.
  • Page 32 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE DRIVE MOTOR Tools Required: Phillips screwdriver, socket and ratchet set, hex key wrench set Step 1 Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
  • Page 33 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE DRIVE MOTOR ( Continued ) Step 7 Remove the two DRIVE MOTOR ASSEMBLY mounting SCREWS securing the ASSEMBLY to the MOTOR MOUNTING BRACKET by using a 1/4” hex wrench. Remove the DRIVE MOTOR ASSEMBLY from the unit.
  • Page 34 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE LIFESPRINGS Tools Required: Phillips screwdriver, socket and ratchet set, hex key wrench set Step 1 Turn the power OFF at the on/off switch and then unplug the unit from the electrical outlet.
  • Page 35 Life Fitness Model 3500 Treadmill How To ... REMOVE AND REPLACE THE TRAY ( Optional Heart Rate Kit ) Tools Required: Phillips screwdriver Step 1 Turn the power OFF by unplugging the unit at the electrical outlet. Step 2 Remove the two SCREWS located on the underside of the TRAY which are securing the TRAY to the DISPLAY CONSOLE.
  • Page 36 Life Fitness Model 3500 Treadmill How To... ADJUST AND TENSION THE STRIDING BELT Tools Required: Hex key wrench set, phillips screwdriver CAUTION: DO NOT MOVE OR PLACE YOUR HANDS UNDER THE UNIT WHILE THE MACHINE IS PLUGGED INTO AN ELECTRICAL OUTLET.
  • Page 37 Life Fitness Model 3500 Treadmill How To... ADJUST AND TENSION THE STRIDING BELT (Continued) Tools Required: Hex key wrench set, phillips screwdriver Step 3 Repeat adjustments until the STRIDING BELT appears centered. Allow the machine to continue running for several minutes to observe if the tracking remains stabilized.
  • Page 38 Life Fitness Model 3500 Treadmill NOTES:...
  • Page 39 Life Fitness Model 3500 Treadmill WIRING DIAGRAM...

  • Page 40: Vent Cover

    Life Fitness Model 3500 Treadmill PARTS IDENTIFICATION DISPLAY CONSOLE, ENG/ENG SERIAL NO. 840024-841699 AK40-00011-0001 SERIAL NO. 841700 AND ABOVE AK40-00049-0001 STOPKEY & CLIP ASSEMBLY AK40-00035-0000 HANDLEBAR : W/ GRIPS OK40-01092-0000 HANDRAIL VERTICAL TUBE OK40-01006-0000 HANDRAIL MOUNT (PLASTIC) OK40-01034-0000 HEART RATE KIT TRAY (OPTIONAL)

  • Page 41: Parts Identification

    Continued Life Fitness Model 3500 Treadmill PARTS IDENTIFICATION...

  • Page 42: Communicating By Fax

    FAX form on the following page. Simply make a copy (or copies) of the FAX sheet and fill in the necessary information. You may FAX us at any time, 24 hours a day, to either of the numbers shown. A Life Fitness service representative will process your order, or respond to your...
  • Page 43 AFTER MARKET SERVICES PARTS ORDER SALE ( IF BOTH PLEASE INDICATE ) PRODUCT TROUBLESHOOTING WARRANTY NAME: CUSTOMER NO: DATE: PHONE: FAX: CONTACT NAME: METHOD OF SHIPMENT: 1 DAY 2 DAY GROUND PARTS ORDER FORM ITEM NO. PART NUMBER DESCRIPTION QUANTITY PRODUCT TROUBLESHOOTING PRODUCT NAME: SERIAL NO.
  • Page 44 Life Fitness Model 3500 Treadmill NOTES:...

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