SportsArt Fitness S770 Repair Manual
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SportsArt Fitness S770 Repair Manual

S770 sportsart fitness
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S770 Electronic Repair Manual

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Summary of Contents for SportsArt Fitness S770

  • Page 1 S770 Electronic Repair Manual...

  • Page 2: Table Of Contents

    1-2-1. Overlay - S770 1-3-1. Component Placement - S770 Display 1-3-2. Component Placement - S770 Lower Body 1-4-1. Block Diagram of Electronic Components - S770 1-5-1. Cable Connections - S770 Display Board 1-5-2. Cable Connections - S770 Drive Board 1-6-1. LED Indicators - S770 Display Board 1-6-2.

  • Page 3: Full Unit Picture - S770

    1-1. Full Unit Picture - S770 1-1-1...

  • Page 4: Overlay - S770

    1-2. Overlay - S770 1-2-1 1-2-1...

  • Page 5: Component Placement - S770 Display

    1-3. Component Placement - S770 Display Cardio board Display board HTR board (contact heart rate) HR receiver (telemetry heart rate) 1-3-1...

  • Page 6: Component Placement - S770 Lower Body

    1-3. Component Placement - S770 Lower Body Battery Drive board Electro-magnet Optic sensor Alternator CSAFE board Flywheel 1-3-2...

  • Page 7: Block Diagram Of Electronic Components - S770

    1-4. Block Diagram of Electronic Components HR receiver brd Key pad Sensor – L Display HTR board Board Keys on handle Sensor – R Cardio/USB brd CSAFE board Battery charger Electro-magnet Drive Board Alternator Optic sensor Battery 1-4-1...

  • Page 8: Cable Connections - S770 Display Board

    1-5. Cable Connections - S770 Display Board Cardio (USB) Connects to CSAFE board Connects to drive board Connects to display board Connects to case board Connects to keys on handle Connects to telemetry heart rate receiver Connects to cardio board...

  • Page 9: Cable Connections - S770 Drive Board

    1-5. Cable Connections - S770 Drive Board Connects to display board Connects to electro-magnet Connects to optic sensor Connects to battery Connects to alternator and battery charger 1-5-2...

  • Page 10: Led Indicators - S770 Display Board

    1-6. LED Indicators - S770 Display Board Power LED 2 Lit indicates there is incoming power supply. Main program IC CSAFE LED Flashing indicates there is CSAFE signal transmission. 1-6-1...

  • Page 11: Led Indicators - S770 Drive Board

    1-6. LEDs Indicators - S770 Drive Board CLK signal indicator LED LED flashes when optic sensor detects movement. Alternator fuse 2A Battery charge LED Lit indicates drive board is emitting power to charge the battery. Battery fuse 2A 1-6-2...
  • Page 12 1-7. S770 Electronic Specification Chart Specification Notes Item AC alternator Power Battery 6.4 VA Backup power Can recharge through product use or exterior battery charger Electro-magnet control Resistance Speed Sensor Infrared detection / Alternator circuit detection LEVEL 1 - LEVEL 20...

  • Page 13: Electronic Malfunction Troubleshooting Chart - S770

    2-1. Electronic Malfunction Troubleshooting Chart - S770 Malfunction Circumstance Points for inspection and testing Components Notes to replace No start Display is not lit; Exercise on 1. Inspect all cable connections. 1. drive (Alternator) unit; display shows no 2. Inspect alternator belt tracking.
  • Page 14 2-1. Electronic Malfunction Troubleshooting Chart - S770, (Continued) Exercise on the unit; press 1. Inspect all cable connections. 1. drive resistance resistance up or down keys; 2. Inspect the STEP value. Does it change? If there board resistance values change on is no STEP signal, there will be no resistance.
  • Page 15 2-1. Electronic Malfunction Troubleshooting Chart - S770, (Continued) No fan Press fan keys; fan does not 1. Inspect the cables on the display board. display function operate. 2. Inspect output voltage to the fan. Replace the display board if there is no power to the fan.

  • Page 16: Troubleshooting

    Troubleshooting Model: S770 Malfunction: No start up (alternator) Circumstance: Exercise on the unit. The display does not light. Possible cause: 1. Poor cable connections LED2: lit indicates 2. Malfunctioning drive board incoming power supply. Troubleshooting: 1. Inspect all cable connections.
  • Page 17 Troubleshooting Model: S770 Malfunction: No start up (battery) Circumstance: Stop exercising; display shuts off immediately. 檢查程式 IC Possible cause: 1. Cables are not connected properly. 2. Battery voltage is too low. Troubleshooting: 1. Inspect cable connections, including adapter cables. LED2 lights to indicate 2.
  • Page 18 Troubleshooting Model: S770 Malfunction: No STEP value Circumstance: 1. No STEP value appears on the display. 2. Exercise on the unit. The display shows no reaction. Possible causes: 1. Alternator belt is off track. There is no power production. Notes: The optic sensor only provides a motion start/stop signal to the display IC.
  • Page 19 Troubleshooting Model: S770 Malfunction: No resistance Circumstance: Exercise on the unit. There is no resistance. Notes: 1. There must first be power from the alternator, plus the optic sensor signal before the display will emit the resistance signal to the drive board before the drive board will emit voltage to the electro-magnet.
  • Page 20 Troubleshooting Model: S770 Malfunction: Resistance is too strong. Circumstance: Exercise on the unit. Resistance is too heavy. Possible cause: 1. Inspect cables for an electrical short. 2. Drive board components have an electrical short. 3. Display is frozen. Troubleshooting: 1. Inspect all cable connections. Inspect cable insulation for tears.
  • Page 21 Troubleshooting Model: S770 Malfunction: Wireless (telemetry) heart rate malfunction Circumstance: Wireless (telemetry) heart rate does not operate. Possible cause: 1. Telemetry transmitter strap battery voltage is too low. 2. Heart rate receiver board is malfunctioning. 3. There is environmental interference, such as that from lights and speakers.
  • Page 22 Troubleshooting Model: S770 Malfunction: Contact heart rate (HTR) malfunction Indicator Name Explanation Circumstance: Hold contacts. Heart rate values are incorrect. LED1 Telemetry heart Flashes to indicate incoming telemetry Possible causes: 1. HTR cable connections rate indicator heart rate signal. 2. HTR board malfunction...
  • Page 23 Troubleshooting Model: S770 Malfunction: Key malfunction – soft keys Circumstance: Press display keys. There is no reaction. Or keys operate continuously. Possible causes: 1. Poor soft key connection 2. Soft keys are defective. Key pad Troubleshooting: 1. Inspect soft key connections as shown.
  • Page 24 Troubleshooting Model: S770 Malfunction: Key malfunction – key switches Circumstance: Press keys. There is no reaction or keys operate continuously. Keys Possible cause: 1. Key switch defect Troubleshooting: 1. Inspect keys as shown on left. 2. Replace key switches. Display board...
  • Page 25 Troubleshooting Model: S770 Malfunction: Key malfunction – handle keys Circumstance: Press keys. There is no reaction. Possible cause: 1. Poor cable connection 2. Handle key switch malfunction Troubleshooting: 1. Inspect the handle key cable connection. 2. Replace the key switch.
  • Page 26 Troubleshooting Model: S770 Display board Malfunction: No fan operation Circumstance: Press fan key. Fan does not operate. Possible cause: 1. RPM is below 50 RPM. 2. Fan motor malfunction 3. Fan has four settings: high, medium, low, off. Troubleshooting: 1. Inspect whether RPM exceeds 50 RPM.
  • Page 27 Troubleshooting Model: S770 Malfunction: Battery does not recharge. Circumstance: Stop exercising on the product. The display immediately blacks out. Possible reason: 1. When speed exceeds 50 RPM, the battery recharges. Recharge voltage from the drive board is 7-8 VDC. 2. Battery voltage of 2.5 VDC is too low; replace the battery.
  • Page 28 Troubleshooting Model: S770 Item: Basic parameter settings include KPH/MPH setting, total distance, total time, and display board IC version. Method: 1. Press the <ENTER> key for three seconds to enter the basic parameter setting mode. 2. Metric/Imperial standard setting Display shows either “UNIT-MPH” (Imperial) or “UNIT-KPH” (Metric).

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