True Fitness 500U, 600R, 750U, 500R, 750R, 600U manual Ecb, Malfunction

Page 6

Symptom

Probable Cause

 

Corrective Action

 

 

 

 

 

ECB

Control Panel

Power on unit. Check for 5VDC between pins 1 and 2. (Page 18)

MALFUNCTION

 

No 5VDC? Replace control panel.

500R, 500U

 

Check for 6VDC or more between pins 5 and 6 of 6PA while issuing

 

 

 

a resistance command.

 

 

 

• No 6VDC or more? Replace control panel.

 

 

 

 

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Defective Cables

• Perform continuity check on upper section and lower section cables.

 

 

 

 

Replace broken cables.

 

 

 

 

 

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Defective ECB

• If cables test OK and voltage is correct on 5 &6 pins – replace ECB

 

Control Board

 

 

board

 

 

 

 

 

 

 

• If ECB does not fix- connect 6PA and 6PB.

 

 

 

 

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Optical Sensor

• Check DC volts between pins 2 and 3. Rotate blades of the motor

 

 

 

 

 

shaft, voltage should shift from 0 VDC and 5VDC. If voltage does

 

DC Motor

 

not shift- replace EC B Board

 

• Check for 6 VDC or more between pins 5&6 on 6 pin PBA @ ECB

 

 

 

 

 

board connection. If >6 VDC exists but motor doesn’t rotate, replace

 

 

 

motor.

 

 

 

 

 

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ECB Limit Switch

• Check continuity between pins 2 and 4 of 6PB. Press lower limit

 

 

 

 

 

switch.

 

 

 

• If no continuity shift- replace ECB limit switch assembly.

 

 

 

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Loud Continuous

The loud continuous tone is a safety feature designed to protect the

 

Tone from lower

 

ECB motor. If the motor binds and cannot move the ECB board will

 

board (ECB board)

 

divert the power from the motor to a speaker that emits this tone. If

 

 

 

you have the continuous tone check to see if the motor is bound.

 

 

 

Check the front pivot point

for the magnet bar and loosen the

 

 

 

bolt to allow for the motor to freely move the magnet bar.

Note: If motor has been bound and then freed the motor may have been weakened. If components now move freely but the motor is laboring – replace the motor.

Page 4

Support Services 800-883-8783

Mon-Fri 8:30am-5:00pm Central Time Zone

Fax: 636-272-7148

 

 

 

Image 6
Contents True Fitness Service Manual Exercise Bicycles Recommended Tool List Start N O S T I C S RPMSymptom Guide ECB MalfunctionIrregular or no Display 500R, 500U DC Adaptor Adapter Plug or Jack Control Panel CablesDefective RPM Sensor Set No RPM Reading 500R, 500UNo Polar Heart Rate 500R, 500U Control Panel Heart Rate Chest Strap External InterferenceIrregular or no Display 600R, 600U No RPM Reading 600R, 600U No Contact Heart Rate 600R, 600U Control Panel Defective Cables Defective HandlesHandlebar Buttons do not Function 600R No Resistance 750U, 750R Enter DA resistance test mode.Heavy Resistance Page No Contact Heart Rate No Polar Heart Rate Wiring Diagrams TR/ TU 500 Wiring Diagram TU 600 Wiring Diagram TR 600 Wiring Diagram TR/ TU 750 Wiring Diagram Page True Upright Bike 500 True Recumbent Page TU 500 Exercise Bike Rear Stabilizer with Bolts SET TR 500 Exercise Bike REF # PART# Description QTY 7T002500 Transportation Handle Set w/Screws Page True Upright Bike 600 True Recumbent TU 600 Parts Diagram TU 600 Bike Decal a TR 600 Parts Diagram TR600 Bike Console Mast W/BOLTS Page True Upright Bike 750 TU 750 Parts Diagram 3 Piece Crank TU 750 3 Piece Crank END CAP for Front Grounding BAR RT TU 750 Parts Diagram 1 Piece Crank TU 750 1PC Crank Frame Side CVR Decal Silvr True Recumbent Bike Page Crank Foot PAD Rear Adjustable TR 750 Parts Diagram TR 750 After 8/5/01 Prior to 02-RE0283C END CAP Rear Grounding BAR PCS After Serial # 02-RE0283C Piece Crank TR 750 After Serial # 02-RE0283C 7TSZRB40SCV-L1 Side Cover Left SET True Fitness Removal Replacement Table of Contents Step Electrical connections are on 500 series bikes only Remove Small Poly-V Pulley Loosen rear hub bracket screws Loosen Hub Bracket Screws Remove Belt & Tensioner Assembly Copyright 2001 True Fitness Technology, Inc Remove Front Hub Assembly Remove Large Pulley Assembly Step Removal & Replacement 500U 500U Step Remove snap ring from belt tensioner Remove Snap Ring Remove Crank Hub Assembly Flat blade screwdriver may be used to pry hub from frame Step Remove Right Belt Poly-V Wheel Remove the snap ring and washers Remove Right Side Tensioner Assembly Mm Hex Wrench Mm Open-End Wrench Hammer Handle Remove brake belt from larger poly-V wheel Remove Belt 600U & 600R Remove Left Side Belt From Assembly Step Remove Left Side Poly-V Wheel Remove Crank Hub Assembly Flat blade screwdriver may be used to pry hub from frame Step Remove Left Belt Poly-V Pulley Remove Poly-V Wheel Pulley Remove Left Side Tensioner Assembly Mm-Hex Wrench Mm Open-End Wrench Hammer Handle Remove brake belt from larger poly-V wheel Remove Belt Remove Brake & Belt Assembly Remove Right Side Belt From Assembly Step Remove Right Side Poly-V Wheel Remove Crank Hub Assembly Flat blade screwdriver may be used to pry hub from frame Step