SportsArt Fitness TR20F Repair Manual
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SportsArt Fitness TR20F Repair Manual

Electronics
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TR20F Repair Manual (Electronics)

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Lawrence
January 19, 2025

Why stop and shows error 14 after using 30min

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1 comments:
Mr. Anderson
February 4, 2025

The SportsArt Fitness TR20F treadmill stops and shows error 14 after 30 minutes of use because the motor has become excessively hot, triggering the motor overheat protective circuit. This can occur if the treadmill has been in use for an extended period. To address this, inspect the motor thermal switch and fold-up switch cable connections, check if the motor cover is hot, and let the unit sit and cool down before resuming use.

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Summary of Contents for SportsArt Fitness TR20F

  • Page 1 TR20F Repair Manual (Electronics)

  • Page 2: Table Of Contents

    3-8-2. Troubleshooting – Fuse Broke after Motor Moves -TR20F 3-8-3. Troubleshooting – Fuse Broke after Use - TR20F 3-9-1. Troubleshooting – ERR-1 Appears before Motor Moves - TR20F 3-9-2. Troubleshooting – ERR-1 Appears after Motor Moves - TR20F 3-10-1. Troubleshooting – ERR-3 - TR20F 3-11-2.
  • Page 3 4-5-1. Inspection and Measurement – Incline Voltage Measurement – TR20F 4-6-1. Inspection and Measurement – VR Voltage Measurement – TR20F 4-7-1. Inspection and Measurement – Incline Motor and VR Calibration - TR20F 4-8-1. Inspection and Measurement – Fold Up Switch Inspection - TR20F...

  • Page 4: Product Picture - Tr20F

    1-1. Product Picture – TR20F 1-1-1...

  • Page 5: Overlay - Tr20F

    1-2. Overlay - TR20F 1-2-1...

  • Page 6: Component Placement - Tr20F Display Board

    1-3. Component Placement - TR20F Display Board Telemetry heart rate receiver board Display board Safety key board HTR board Bridge board 1-3-1...

  • Page 7: Component Placement - Tr20F Lower Compartment

    1-3. Component Placement - TR20F Lower Compartment Incline VR set DC incline motor Optic sensor Transformer Motor Drive board Fold up switch 1-3-2...

  • Page 8: Display Block Diagram - Tr20F

    1-4. Display Block Diagram - TR20F Telemetry Display receiver board board Safety key Bridge Key pad board Sensor L HTR board Sensor R Motor FUSE Filter Drive board Optic sensor Transformer Thermal sensor Fold up switch Incline motor Incline VR...

  • Page 9: Cable Connections - Tr20F Display Board

    1-5. Cable Connections - TR20F Display Board To drive board To keys on lower part of display board To telemetry heart rate receiver board To safety key board To HTR receiver board To keys on upper part of display board...

  • Page 10: Cable Connections - Tr20F Drive Board

    1-5. Cable Connections - TR20F Drive Board To optic sensor To display board To incline motor To VR set To motor thermal sensor To transformer and fold up switch Fold up switch To power supply AC1, AC2 1-5-2...

  • Page 11: Led Indicators - Tr20F Display Board

    1-6. LED Indicators - TR20F Display Board LED1 power indicator Lit indicates 5 VDC power supply. 1-6-1...

  • Page 12: Indicator Leds - Tr20F Drive Board

    1-6. Indicator LEDs - TR20F Drive Board LED 7 MC indicator LED 2 Flashing indicates an incoming Lit indicates VCC optic sensor signal. power supply. LED 4 M-Temp Lit indicates motor temperature is too hot. LED5 INC-DN Lit indicates incline is operating downward.

  • Page 13: Electronic Specifications - Tr20F

    1-7. Electronic Specifications - TR20F Details Notes Specification 110V / 220V Exterior power supply DC motor (with internal thermal switch) Motor With brushes With heat protection Optic sensor Infrared optic sensor KPH: 0.8 - 16.0(KPH) Speed range MPH: 0.5 –10.0(MPH)

  • Page 14: Electronic Malfunction Troubleshooting Table - Tr20F

    2-1. Electronic Malfunction Troubleshooting Table - TR20F Malfunction Circumstance Inspection and test points Components to Notes replace Safety key Put safety key in place. 1. Inspect the cable connections on the lower part of the display Safety key board malfunction Display has no reaction.
  • Page 15 2-1. Electronic Malfunction Troubleshooting Table - TR20F Incline Incline position on display 1. Inspect all cable connections. 1. VR position is differs from actual position. 2. Inspect drive board incline VR voltage across red and green 2. Display board not correct.
  • Page 16 2-1. Electronic Malfunction Troubleshooting Table - TR20F ERR 3 Display speed differs from 1. Inspect KPH/MPH setting. 1. Optic sensor 2. actual speed. 2. Inspect the optic wheel teeth. Drive board 3. Replace the optic sensor. 4. Replace the drive board.
  • Page 17 2-1. Electronic Malfunction Troubleshooting Table - TR20F Main fuse is Turn on unit. The fuse 1. Inspect whether the power cord has an electrical short. 1. Drive board broken. blows. 2. Drive board components have an electrical short. Replace the drive board.

  • Page 18: Troubleshooting

    Troubleshooting Model: TR20F Malfunction: Safety key malfunction Circumstance: Put the safety key in place. The display shows no reaction. Safety key “Safety key” appears. cable Possible cause: Safety key board malfunction Troubleshooting: 1. Inspect the safety key magnet. 2. Inspect bridge board connections.
  • Page 19 Troubleshooting Model: TR20F Malfunction: No start up. Unit does not operate. Circumstance: Turn unit power on. The power indicator does not light. Possible cause: Incoming power supply or component malfunction. Troubleshooting: 1. Inspect the power cable connection. 2. Inspect cable connections under the motor cover.
  • Page 20 Troubleshooting Model: TR20F 主程式 IC Malfunction: No start up. Unit does not operate. LED1 power indicator Circumstance: Turn unit power on. The power indicator does not light. Lit indicates incoming 5V Program IC Possible cause: 1. AC power supply enters the drive board, goes through power supply.
  • Page 21 Troubleshooting Model: TR20F Malfunction: Telemetry heart rate malfunction Telemetry heart Circumstance: Telemetry heart rate malfunction rate receiver Possible cause: board 1. Transmitter battery voltage is too low. 2. Telemetry receiver board malfunction 3. Environmental interference, possibly from lights or speakers Troubleshooting: 1.
  • Page 22 Troubleshooting Model: TR20F Malfunction: Key malfunction – soft keys Circumstance: Press display keys. Display shows no reaction, or keys operate continually. Possible cause: 1. Bridge board soft key connections are not connected properly. 2. Soft keys are bad. Soft key connection Troubleshooting: 1.
  • Page 23 Troubleshooting Model: TR20F Inspect display board cable Malfunction: Incline does not operate up or down. connections and the program IC. Circumstance: Press incline keys. Incline does not operate up or down. Possible cause: 1. Cables are not connected properly. 2. Drive board or VR malfunction.
  • Page 24 Troubleshooting Model: TR20F Malfunction: Incline position malfunction Inspect the display cable connections Circumstance: The incline setting and actual incline position differ. and program IC Possible cause: 1. VR wear 2. Display board incline setting circuit malfunction Troubleshooting: 1. Inspect all cable connections.
  • Page 25 Troubleshooting HTR Board LEDs Model: TR20F Indicator Name Explanation Malfunction: HTR malfunction LED1 Telemetry heart Flashes to indicate incoming telemetry Circumstance: Contact heart rate (HTR) value rate indicator heart rate signal. malfunction LED2 HTR contact Lights to indicate that someone is Possible cause: 1.
  • Page 26 Troubleshooting Model: TR20F Malfunction: The fuse has broken. Circumstance: Turn on unit. The fuse immediately blows. Possible cause: 1. Components and the frame have an abnormal electrical short. 2. Drive board component malfunction Troubleshooting: 1. Inspect the power cord. Is the cord insulation broken and creating an electrical short? 2.
  • Page 27 Troubleshooting Model: TR20F Malfunction: The fuse has broken. Circumstance: Press the speed key. Motor rotates. Fuse blows. Possible cause: 1. Motor has an abnormal, internal electrical short. 2. Drive board malfunction Troubleshooting: 1. Replace the drive board as a test.
  • Page 28 Troubleshooting Model: TR20F Malfunction: The fuse has blown. Circumstance: After a period of use, the fuse suddenly breaks. Possible cause: 1. Fuse holder malfunction 2. Deck or belt wear 3. Drive board malfunction Troubleshooting: 1. Inspect the fuse and fuse holder installation.
  • Page 29 Troubleshooting Model: TR20F Malfunction: Error 1 Inspect the display cable connections Malfunction: Press the speed key. Speed engages. Before the motor rotates, and program IC. Error 1 appears. Possible cause: 1. Motor does not rotate. Drive board or motor malfunctions.
  • Page 30 Troubleshooting Model: TR20F Malfunction: Err 1 Inspect the display cable connections Circumstance: Press Speed key. Motor rotates. Err1 appears. and the IC connection. Possible cause: 1. Motor rotates optic sensor malfunctions Troubleshooting: 1. Inspect all cable connections. 2. Inspect whether CLK indicator on drive board flashes.
  • Page 31 Troubleshooting Model: TR20F Malfunction: Err 3 Circumstance: Display speed and actual speed differ. Possible cause: 1. Optic wheel teeth or optic sensor malfunction 2. Drive board malfunction Troubleshooting: 1. Inspect whether optic wheel teeth are missing. 2. Replace the optic sensor as a test.
  • Page 32 Troubleshooting Model: TR20F Malfunction: Err 7 Inspect the display cable connections Circumstance: Display shows ERR 7. and program IC connections. Possible cause: 1. Drive board or VR malfunction made the incline VR wires red – stick at highest or lowest level.
  • Page 33 Troubleshooting Model: TR20F Malfunction: ERR 10 Circumstance: The walk belt suddenly rotates quickly. Possible cause: 1. Drive board IGBT has an electrical short. The protective circuit fails. 2. The protective circuit fails, prompting the error code. This cause is unlikely.
  • Page 34 Troubleshooting Model: TR20F Malfunction: ERR 14 Circumstance: Display shows ERR 14, the motor overheat error. Possible cause: 1. Motor is excessively hot; overheat protective circuit operates. Troubleshooting: 1. Inspect the motor thermal switch and fold-up switch cable connections. (These two cables are connected.) 2.
  • Page 35 Troubleshooting Model: TR20F Malfunction: ERR 14 Circumstance: Display shows ERR 14. The fold up switch operates. Possible cause: 1. Fold up switch operates inappropriately. Troubleshooting: 1. Inspect the motor thermal switch and fold up switch cable connections. (These two cables are connected.)
  • Page 36 Other Topics Model: TR20F Item: KPH/MPH unit selection, total distance, total time, display board/drive board program versions Method: 1. Do not put the safety key in place. Press and hold the <CHANGE> key for three seconds to enter the basic parameter setting mode.
  • Page 37 Other Topics Model: TR20F Item: Error Code Table : Display board main program has not received the optic sensor signal. : Display setting and actual speed differ. : The display detected that the incline VR voltage is too high or too low, indicating that the incline is stuck in the wrong position.
  • Page 38 Inspection and Measurement Inspection point: TR20F optic wheel, optic sensor Inspection method: 1. Inspect the optic wheel placement. The optic wheel should rotate in the center of the optic sensor. It should not touch the optic sensor. 2. Inspect whether optic wheel teeth have broken.
  • Page 39 Inspection and Measurement Inspection point: TR20F transformer Inspection method: 1. Inspect whether the transformer fuse has blown. 2. Measure transformer voltage. 3. Set the multi-meter to the AC setting. Place probes as follows: Transformer cables Voltage red-red or blue-blue (input...
  • Page 40 Inspecting and Measuring Inspection point: TR20F motor brushes Inspection method: 1. Inspect motor brushes. A. Inspect brush length. If brushes are shorter than 0.7mm, replace the brushes. B. Inspect the brush surface. It should be smooth. If there are grooves, the commutator might be faulty.
  • Page 41 Inspection and Measurement Inspection point: TR20F motor voltage test at the drive board Inspection method: 1. Select the VDC setting on the multi-meter. Place probes on M+M- connectors on the drive board. 2. Press the SPEED<▲> key. The motor should operate, allowing you to measure motor voltage.
  • Page 42 Inspection and Measurement Inspection point: TR20F incline voltage measurement at the drive board Inspection method: 1. Do not press any key. Incline indicators do not light. The drive board does not emit voltage to the incline motor. The incline motor does not operate.
  • Page 43 Inspection and Measurement Inspection point: Measuring VR voltage on the drive board Inspection method: 1. Select the VDC setting on the multi-meter. Place probes on the VR set red-green wires. 2. If the VR voltage fluctuates widely, the VR is bad. Replace it. Incline key Drive board VR voltage Incline position...
  • Page 44 Inspection and Measurement Inspection point: Incline motor and VR calibration Inspection method: I. Calibration goals Adjust the incline set tube to the red calibration line. Adjust the VR voltage across red and green wires to 1.20V. II. Calibration steps: Step 1. Adjust the incline tube to the red calibration line as follows: A.
  • Page 45 Inspection and Measurement Inspection point: Fold up switch inspection Inspection method: 1. Fold up switch and motor thermal sensor cable connections. 2. Inspect fold up cable connections. 3. Inspect the fold up switch and unit position. Drive board LED4 operates as follows: Unit Fold up switch Drive board LED 4...

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