Quinton Q50 - Grade Feedback Problem: Diaplay Varies from Actual Grade; Speed Feedback Problem: Display Varies from Actual Speed

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Table of Contents3
Description7
Accessories and Options7
Specifications8
Power Options and Requirements9
Receiving, Unpacking and Installation11
Installation Checkout Procedure13
Theory of Operation15
Power Supply17
Power-Up Detect17
Start Belt17
Speed Feedback18
Speed Limits19
Speed Control19
Stop Belt20
Emergency off Switch21
Drive Motor Fault21
Slow-Speed Threshold21
Reset Switch/High-Speed Decel22
Grade Change23
Grade Feedback23
Assembly, Disassembly, and Calibration Procedures25
Removing the Treadmill Hood25
Motor Assemblies25
Drive Motor25
Ground Wire Connection26
Reset Switch and Connectors26
Drive Motor Contactor27
Speed Change Motor27
Treadmill PCB Assembly View27
Tachometer Assembly28
Optical Sensor Replacement28
Beam Chopper Replacement28
Beam Chopper Wheel Alignment28
Replacing the Treadmill PCB Assembly29
Input Shaft Assembly Procedures29
Input Shaft Assembly Replacement30
"T" Stamp View30
Speed Change Mechanism View30
Output Shaft Assembly Removal32
Output Shaft Assembly Replacement32
Replacing the Variable Speed Belt33
Replacing the Final Drive Belt33
End Caps and Siderail Cover33
Adjusting the Final Drive Belt Tension34
Deck Mounting Screws and Drive Pulley Retainer Screws34
Drive Pulley Cover on Bottom of Treadmill34
Grade Change (Elevation) System35
Grade Motor View35
Grade Pot and Pinion Shaft35
Grade Potentiometer (Pot) Replacement36
Removing the Rack Gears36
Replacing a Jammed Rack Gear37
Handrail Support Bracket and Rack Gear37
Replacing the Pinion Shaft38
Walking Deck Assembly39
Removing and Replacing the Front (Drive) Roller or the Idler Roller40
Replacing the Walking Belt40
Walking Belt Splice Overlap Placement40
Walking Belt Adjustment Procedures41
Removing the Slider Bed41
Walking Belt Tension41
Walking Belt Tracking42
Rear Roller Guard Adjustment43
Grade Pot and Pinion Shaft View43
Calibration Procedures44
Grade Potentiometer (Pot) Calibration44
Grade Feedback Calibration44
Speed Feedback Calibration44
Measuring Walking Belt Speed45
Calibrating the Walking Belt Speed45
To Calibrate the Speed Display45
To Set the Threshold Speed45
PCBA View46
Speed Adjustments (Mph)47
V-Belt Adjustment48
Torque Limiter Adjustment48
Drive Motor View48
Torque Limiter, Adjustment Nut and Tabs View49
Reset Switch and Connectors View49
Replacing the Power Cord50
Replacing the Reset Switch50
Cleaning the Treadmill Surfaces50
Troubleshooting51
Troubleshooting Mechanical Component Noises52
LED Codes for the Controller52
Fuses Tables53
Leds on Treadmill PCB Assembly53
Connectors and Jumper Pins54
Voltage Test Points on PCB Assembly55
Treadmill Does Not Power up56
Treadmill Does Not Change Speed56
No High-Speed Deceleration57
Treadmill Power Up, but Belt Does Not Move57
Treadmill will Not Change Grade57
Grade Feedback Problem: Diaplay Varies from Actual Grade58
Speed Feedback Problem: Display Varies from Actual Speed58
Walking Belt Slipping or Not Tracking59
Internal Belt Slippages59
Part Numbers and Drawings61
Drawing List61
Commonly Referenced Part Numbers63
Source Control Drawing65
Dimensional Data69
Schematic Diagrams125

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Quinton Q50 - Grade Feedback Problem: Diaplay Varies from Actual Grade; Speed Feedback Problem: Display Varies from Actual Speed

Table of Contents

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