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C51R/C51U Bike Repair Manual (Electronics) - Troubleshooting

Malfunction: Key Operation Error

After turning on the unit, the display operates as if keys were pressed, even though
no key was pressed. Or the user presses a key, but the display shows no reaction.

Operation Diagram

Normal Operation

Order Part

Operation

1 Keys

1. When a key is not pressed, its circuit is “open” – not conductive. The display

does not react to the key.
2. When the key is pressed, the key circuit is “closed” – conductive. The key signal
travels to the display board.

2 Display

1. The display board main program IC reads the key signal and, in return, sends

command signals accordingly.

6-2-1

DISPLAY BOARD

KEY BOARD

Summary of Contents for C51R

Page 1: ...C51R C51U Bike Repair Manual Electronics C51R Bike C51U Bike Version 1 Date 11 24 04 ...

Page 2: ...Bike Repair Manual Electronics was made as a troubleshooting guide for technicians in the field Please send suggestions and comments to bob sportsartamerica com Thank you Preliminary Manual Date 04 15 04 Version 1 Date 11 24 04 Format revised contents updated 0 ...

Page 3: ...ation Display 1 3 1 C51U Parts Lower Half 1 3 2 C51R Parts Lower Half 1 4 1 C51U Display Front 1 4 2 C51R Display Front 1 5 1 Display Board Front 1 5 2 Display Board Back 1 6 1 Drive Board 1 7 1 Other Electronic Components Continued through 1 7 2 Chapter 2 Product Functions 2 1 1 C51R C51U Product Function Overview 2 1 2 Display Functions Windows 2 1 3 Display Functions Light Emitting Diode LED In...

Page 4: ...ance Operation 3 1 7 Stop Operation 3 1 8 Pause Reset Operation 3 1 9 Mode Operation Chapter 4 Wire Connections 4 1 1 Display Board Wire Connections 4 1 2 Drive Board Wire Connections Chapter 5 Component Placement 5 1 1 Component Placement on the Display Board 5 1 2 Display Board LED Placement 5 1 3 Display Board Cable Connections 5 2 1 Drive Board Component Placement 5 2 2 Drive Board LED Placeme...

Page 5: ... 3 1 Malfunction ERR 7 Continued through 6 3 4 6 4 1 Malfunction No Resistance Motor Movement Continued through 6 4 4 6 5 1 Malfunction Polar Heart Rate Error Continued through 6 5 4 6 6 1 Malfunction Heart Touch Rate HTR Reading Error Continued through 6 6 6 6 7 1 Malfunction Fuse Breaks Continued through 6 7 2 6 8 1 Malfunction No Speed Count Continued through 6 8 2 Note HTR function is not offe...

Page 6: ... 1 2 C51R Exercise Bicycle Picture 1 2 1 C51U Part Location Display 1 2 2 C51R Part Location Display 1 3 1 C51U Parts Lower Half 1 3 2 C51R Parts Lower Half 1 4 1 C51U Display Front 1 4 2 C51R Display Front 1 5 1 Display Board Front 1 5 2 Display Board Back 1 6 1 Drive Board 1 7 1 Other Electronic Components Continued through 1 7 2 1 0 0 ...

Page 7: ...C51R C51U Bike Repair Manual Electronics Illustrations C51U Exercise Bicycle Picture 1 1 1 ...

Page 8: ...C51R C51U Bike Repair Manual Electronics Illustrations C51R Exercise Bicycle Picture 1 1 2 ...

Page 9: ...C51R C51U Bike Repair Manual Electronics Illustrations C51U Part Location Display 1 2 1 ...

Page 10: ...C51R C51U Bike Repair Manual Electronics Illustrations C51R Part Location Display 1 2 2 ...

Page 11: ...C51R C51U Bike Repair Manual Electronics Illustrations C51U Parts Lower Half 1 3 1 Resistance Motor VR Reed Switch Wire Drive Board On Off Switch Transformer Fuse ...

Page 12: ...C51R C51U Bike Repair Manual Electronics Illustrations C51R Parts Lower Half 1 3 2 Reed Switch Wire VR Fuse Drive Board Transformer On Off Switch ...

Page 13: ...C51R C51U Bike Repair Manual Electronics Illustrations C51U Display Front 1 4 1 ...

Page 14: ...C51R C51U Bike Repair Manual Electronics Illustrations C51R Display Front 1 4 2 ...

Page 15: ...C51R C51U Bike Repair Manual Electronics Illustrations Display Board Front 1 5 1 ...

Page 16: ...C51R C51U Bike Repair Manual Electronics Illustrations Display Board Back 1 5 2 ...

Page 17: ...C51R C51U Bike Repair Manual Electronics Illustrations Drive Board 1 6 1 ...

Page 18: ...ir Manual Electronics Illustrations Other Electronic Components Part Transformer 110V Part No 051823020 Part Transformer 220V Part No 051823030 Part POLAR Receiver Part No 111120040 Part Key Board Part No 052420021 1 7 1 ...

Page 19: ...C51R C51U Bike Repair Manual Electronics Illustrations Other Electronic Components Continued Part On Off Switch Part No 000125020 Part Reed Switch Part No 052427050 Part VR Set Part No 051851041 1 7 2 ...

Page 20: ...anual Electronics Functions Chapter 2 Product Functions 2 1 1 C51R C51U Product Function Overview 2 1 2 Display Functions Windows 2 1 3 Display Functions Light Emitting Diode LED Indicators 2 1 4 Display Functions Keys 2 0 0 ...

Page 21: ...n market KPH MPH Display jumper JUMP1 Continuity KPH No continuity MPH USER Configurations Four user configurations USER1 USER4 Other Specifications Serial number location C51R in back of unit faces rear on transport handle that extends below the seat C51U in back of unit faces front on frame post connected to rear stand On Off switch location C51R in front of user at about knee level C51U behind ...

Page 22: ...crolling messages and resistance illustrations MODE Window 1 ÎTIME Lit Shows time ÎHR Lit Shows heart rate ÎRESISTACE LEVEL Lit Shows resistance level ÎWATTS Lit Shows WATTS MODE Window 2 ÎDISTANCE Lit Shows distance ÎCAL Lit Shows calorie expenditure ÎSPEED Lit Shows speed ÎRPM Lit Rotations per minute ...

Page 23: ...tion mode is activated HILL LED lit Shows hill mode is activated RANDOM LED lit Shows random resistance mode is activated INT1 LED lit Shows INTERVAL 1 mode is activated INT2 LED lit Shows INTERVAL 2 mode is activated DISTANCE LED lit Shows accumulated distance SCAN LED lit Scans from one readout function to the next TIME HR RESISTANCE LEVEL RPM indicators light in WATT LED lit Shows WATTS HR LED ...

Page 24: ...N MANUAL Press for manual operation HILL Press to run the hill workout RANDOM Press to set random workout INT2 Press to run INTERVAL2 mode INT1 Press to run INTERVAL1 mode RESISTANCE LEVEL Î Press to set RESISTANCE LEVEL lower or higher RESET ÎPress to reset STOP ÎPress to stop action QUICK START ÎPress to start without setting personal details START ÎPress to start with personal details ENTER ÎPr...

Page 25: ... Chapter 3 Product Operation 3 1 1 Start Up Operation 3 1 2 User Settings Continued through 3 1 3 3 1 4 Program Operation 3 1 5 Quick Start Operation 3 1 6 Resistance Operation 3 1 7 Stop Operation 3 1 8 Pause Reset Operation 3 1 9 Mode Operation 3 0 0 ...

Page 26: ...g power cord into the bike and appropriate wall power socket 2 Turn on the On Off switch C51 scrolls across the display 3 Press the START key to operate with personal details see User Settings on 3 1 2 or press the QUICK START key to immediately start exercising see Quick Start on 3 1 5 Start Up Display Scrolling C51 ...

Page 27: ...eft b Press the RESISTANCE LEVEL keys to select USER1 USER4 Press the ENTER key to confirm your choice 2 Establish the user weight setting as follows a The WT indicator lights indicating the activation of the weight setting mode The left MODE window shows either a pre set value or a weight set by another user as shown on the lower right b Press RESISTANCE LEVEL keys to select your weight Press the...

Page 28: ...tting as follows a MODE window TIME indicator lights The MODE window shows the time value b Press the RESISTANCE LEVEL keys to change the time value Press the ENTER key to confirm your selection Time setting range 5 to 99 minutes Time Value 30 Minutes Increasing Time Value to 31 Minutes ...

Page 29: ...ny PROGRAM key to activate that program The illustration on the lower left shows the display with a MANUAL program selected MANUAL program LED lights the main window shows the resistance level The illustration on the right shows a user selecting a STAIR program The STAIR program LED lights the main window shows resistance Manual Program Resistance Level 1 Stair Program Resistance Illustration ...

Page 30: ...ing user details Procedure 1 After starting up the unit the display shows C51 2 Press the QUICK START key The display appears as shown below Note that PROGRAM LEDs do not light 3 Press RESISTANCE LEVEL keys to set the resistance level The main window shows the RESISTANCE LEVEL The higher the dots the higher the resistance level ...

Page 31: ...SISTANCE LEVEL LED lights 1 Press the RESISTANCE LEVEL key Values in the RESISTANCE LEVEL window lower left increase Actual resistance increases 2 Press the RESISTANCE LEVEL key Values in the RESISTANCE LEVEL window lower right decrease Actual resistance decreases Resistance level range LEVEL 1 20 Increasing Resistance Decreasing Resistance ...

Page 32: ...T TIME and DISTANCE LEDs light and their respective values appear lower left 2 TIME and DISTANCE values appear simultaneously for 4 seconds 3 HR and CAL LEDs light and their respective values appear for 4 seconds lower right 4 The display cycles twice as explained in steps 2 and 3 then C51 scrolls across the display Time and Distance Values Heart Rate and Calorie Values ...

Page 33: ... reset functions Procedure 1 Press the PAUSE RESET key The word PAUSE scrolls across the display lower left Press the START key or start exercising to recover the time count 2 Press and hold the PAUSE RESET key for two seconds C51 scrolls across the display as shown on the right Pause Function Reset Function ...

Page 34: ...ues for TIME HR RESISTANCE LEVEL WATTS DISTANCE CAL SPEED RPM SCAN Procedure 1 Press the left MODE key to see values for TIME HR RESISTANCE LEVEL WATTS SCAN lower left 2 Press the right MODE key to see values for DISTANCE CAL SPEED RPM SCAN lower right Left Mode Key Right Mode Key 3 1 9 ...

Page 35: ...C51R C51U Bike Repair Manual Electronics Connections Chapter 4 Wire Connections 4 1 1 Display Board Wire Connections 4 1 2 Drive Board Wire Connections 4 0 0 ...

Page 36: ...C51R C51U Bike Repair Manual Electronics Connections Display Board Wire Connections DISPLAY BOARD KEY BOARD POLAR BOARD DRIVE BOARD 4 1 1 ...

Page 37: ...C51R C51U Bike Repair Manual Electronics Connections Drive Board Wire Connections DISPLAY BOARD DRIVE BOARD RESISTANCE VR MOTOR REED SWITCH WIRE FUSE ON OFF SWITCH TRANSFORMER POWER CORD 4 1 2 ...

Page 38: ...pter 5 Component Placement 5 1 1 Component Placement on the Display Board 5 1 2 Display Board LED Placement 5 1 3 Display Board Cable Connections 5 2 1 Drive Board Component Placement 5 2 2 Drive Board LED Placement 5 2 3 Drive Board Wire Connections 5 0 0 ...

Page 39: ...C51R C51U Bike Repair Manual Electronics Placement Component Placement on the Display Board 5 1 1 ...

Page 40: ...SPORTS ART INDUSTRIAL CO LTD C51R C51U Display Board LED Placement and Explanation DISTANCE RESISTANCE LEVEL CAL WATTS SPEED TIME RPM HR SCAN SCAN HILL MANUAL RANDOM INT1 INT2 5 1 2 ...

Page 41: ...SPORTS ART INDUSTRIAL CO LTD C51R C51U Display Board Cable Connections CN1 ÎTo drive board CN2 ÎTo POLAR board CN3 ÎTo HTR cable not used in North American Market CN4 ÎTo key board 5 1 3 ...

Page 42: ...C51R C51U Bike Repair Manual Electronics Placement Drive Board Component Placement 5 2 1 ...

Page 43: ...ts to indicate incoming reed switch signal LED3 Level Up Indicator ÎWhen lit VR motor operates Resistance increases LED4 Level Down Indicator ÎWhen lit VR motor operates Resistance decreases LED2 Motor Power Indicator ÎLit indicates power is available to the motor LED1 Power Indicator ÎLit indicates power to the board ...

Page 44: ...C51R C51U Bike Repair Manual Electronics Placement Drive Board Wire Connections 5 2 3 CN2 Îto transformer CN1 Îto power cord CN5 Îto reed switch CN4 Îto resistance VR motor CN3 Îto display ...

Page 45: ...tion ERR 7 Continued through 6 3 4 6 4 1 Malfunction No Resistance Motor Movement Continued through 6 4 4 6 5 1 Malfunction Polar Heart Rate Error Continued through 6 5 4 6 6 1 Malfunction Heart Touch Rate HTR Reading Error Continued through 6 6 6 6 7 1 Malfunction Fuse Breaks Continued through 6 7 2 6 8 1 Malfunction No Speed Count Continued through 6 8 2 Note HTR function is not offered on C51 b...

Page 46: ...ronics Troubleshooting Malfunction Display Will Not Light Up Turn on unit power switch Display board does not beep and display does not light up Operation Diagram DISPLAY BOARD DRIVE BOARD FUSE ON OFF SWITCH POWER CORD TRANSFORMER 6 1 1 ...

Page 47: ...ormer is alternating current AC 5 Drive Board 1 The drive board turns the alternating current from the transformer into direct current DC for use by various circuits such asVBB andVCC circuits 6 Data Cable 1 Drive board VBB and VCC circuit power travels the data cable to the display 7 Display Board 1 After the display getsVBB andVCC circuit voltage it lights up and operates Possible Causes of Malf...

Page 48: ...ut of it inspect wire connections If connections are good replace the switch 4 CN1 1 Inspect the main power cable connection CN1 at drive board See 5 2 3 5 Transformer 1 Inspect transformer wire connection CN2 at the drive board 2 Inspect the transformer input and output voltages See 6 1 4 6 Drive Board 1 Inspect drive board LEDS LED1 and LED2 light when there is power to the board See 6 1 6 7 Dat...

Page 49: ...C51R C51U Bike Repair Manual Electronics Troubleshooting Transformer Voltage Test Test Configuration 6 1 4 ...

Page 50: ...elow These are the primary input wires 4 Normal reading 110VAC N America or 220VAC Europe Transformer voltage input wall power 5 Test other like colored wires in order as indicated below These are the secondary output wires Troubleshooting 1 If there is no input voltage inspect the on off switch the fuse the power cable connections and power at the wall 2 If there is input but no output the transf...

Page 51: ...ors do not light investigate as follows 2 Inspect whether CN1 is connected properly A disconnected CN1 cable would prevent power from reaching the drive board 2 Inspect whether the transformer is connected properly Inspect the transformer 3 Inspect whether the power fuse is OK Replace the fuse if necessary 4 Disconnect the CN3 cable and see if the problem goes away An electrical short in the cable...

Page 52: ...tVBB circuit voltage across L7 and L8 Test Procedure 1 Turn on unit power Drive board LED1 and LED2 light 2 Put the multimeter to the 20VDC setting Place probes on inductors L7 and L8 as shown Normal reading approximately 12VDC 3 If the reading does not show 12VDC inspect the data cable and drive board ...

Page 53: ...oltage across L1 and L6 Test Procedure 1 Turn on unit power Drive board LED1 and LED2 light 2 Put the multimeter to the 20VDC setting Place probes on inductors L1 and L6 as shown Normal reading approximately 5VDC 3 If the reading does not show 5VDC inspect the data cable and drive board Replace the main program IC U9 ...

Page 54: ... shows no reaction Operation Diagram Normal Operation Order Part Operation 1 Keys 1 When a key is not pressed its circuit is open not conductive The display does not react to the key 2 When the key is pressed the key circuit is closed conductive The key signal travels to the display board 2 Display 1 The display board main program IC reads the key signal and in return sends command signals accordi...

Page 55: ...se described above 4 Or there s an error in processing signals at the IC Troubleshooting Order Part Troubleshooting 1 Key Board 1 Inspect the keys for proper functioning See 6 2 3 2 Cable 1 Inspect the connections at the display CN4 connector and the key circuit board Inspect the cable for continuity 3 Display 1 Test display keys See 6 2 XX Also see shortcut below Shortcut Connect a new key circui...

Page 56: ... c If the reading shows a number such as 0 ohm the key has shorted out Replace the key circuit board 2 Test for open when the key is pressed a Put multimeter to the ohm setting Place probes on the two points on one side of the key b Press the key Normal reading near 0 ohm as shown on the lower right c If the reading is greater than 2 ohm or open not conductive the key is malfunctioning Replace it ...

Page 57: ... problem desists and the cable is good the key is at fault Replace the key circuit board If a key is pressed but the display shows no reaction inspect the following The cable connection left cable continuity the key 6 2 3 If replacing the key circuit board and its cable fails to resolve the problem replace IC U1 on the display CN4 Connector top Key Board Cable middle Key Circuit Board bottom U1 Ma...

Page 58: ... shows a number near 0 ohm the key has shorted out Replace the key or the whole display board 2 Test for open when the key is pressed a Put multimeter to the ohm setting Place probes on two points on one side of the key b Press the key as shown on the lower right Normal reading close to 0 ohm c If the reading is greater than 2 ohm or open the key is malfunctioning Replace the key or the whole disp...

Page 59: ...pair Manual Electronics Troubleshooting Key Definition Illustrations 6 2 6 Mode Manual Hill Random Interval 1 Interval 2 Mode Level Up Enter Start Level Down Stop Pause Reset Quick Start Display Board Key Circuit Board ...

Page 60: ...ration Diagram DISPLAY BOARD DRIVE BOARD VR SIGNAL VR CABLE VR VOLTAGE ERR7 Operation Order Part Operation 1 Drive Board 1 The drive board provides 5VDC power supply forVR operation 2 VR 1 Resistance motor operation turns a variable resistor VR on the motor VR assembly 2 As the VR turns one way voltage output increases As it turns the other way voltage output decreases Continued on the following p...

Page 61: ...isplay lacks information to command motor action so ERR7 appears Circumstance of Malfunction 1 Turn on unit power Display shows ERR7 ERR7Troubleshooting Order Part Procedure 1 Drive Board 1 Measure power supply to the VR across the black and blue wires Normal reading 5 VDC If not inspect the drive board See 6 1 1 Replace it if receiving but not outputting power 2 VR 1 Measure VR output across the ...

Page 62: ...C51R C51U Bike Repair Manual Electronics Troubleshooting VR OutputVoltage at the Drive Board Test Configuration 6 3 3 ...

Page 63: ...VDC 3 Press the RESISTANCE LEVEL key until the LEVEL window shows 20 The actual resistance should be at its highest level NormalVR voltage 4 59 4 49VDC 4 Press the RESISTANCE LEVEL key until the LEVEL window shows 1 The actual resistance should be at its lowest level NormalVR voltage 0 41 0 31VDC Troubleshooting 1 IfVR voltage reading differs from those above or if it changes suddenly during opera...

Page 64: ...le connections in the pedestal 3 Drive Board 1 Inspect drive board power output to the motor See 6 4 2 If there is power to the motor but the motor does not operate replace it If there is no power output inspect whether the drive board has power See 6 1 1 6 4 1 DISPLAY DATA CABLE MOTOR DRIVE BOARD Order Part Description 1 Display 1 Key signal travels to the display The main program IC then sends a...

Page 65: ...C51R C51U Bike Repair Manual Electronics Troubleshooting MotorVoltageTest Test Configuration 6 4 2 ...

Page 66: ...erates Resistance decreases 5 If there is no voltage inspect the transformer output voltage See 6 1 1 If the transformer voltage is OK the drive board is bad Replace it Motor OhmTest Simply put if there is power to the motor and the motor does not operate it is bad But what happens if there is no power to the motor Is there still a way to check the motor Yes you can perform an ohm test on the moto...

Page 67: ...n Test Procedure 1 Disconnect the CN4 wire connector from the drive board 2 Put the multimeter to the ohm setting Place probes on the motor green and orange wires as shown 3 Normal reading about 2 ohm Bad readings 10 ohm open or 0 ohm 4 If the reading is bad replace the motor VR set 6 4 4 ...

Page 68: ...Operation Order Part Operation 1 Polar Transmitter 1 Heart rate transmitter detects the user s pulse and transmits a signal to the Polar receiver 2 Polar Receiver 1 The receiver receives the signal and sends it to the display board 3 Display Board 1 The CPU reads the heart rate signal 2 The heart rate appears in the heart rate window on the display 6 5 1 DISPLAY BOARD POLAR TRANSMITTER POLAR RECEI...

Page 69: ...er 1 Inspect whether the Polar transmitter operates on other products See 6 5 3 2 If not replace it Note Transmitter batteries can be recharged by Polar 2 Polar Receiver 1 Inspect Polar receiver placement Location can determine signal reception In general keep it as far from electronic components as possible 2 Inspect the solder on the Polar board If solder is loose replace the board Make sure tha...

Page 70: ...ctronics Troubleshooting Testing the Polar Heart Rate Function 6 5 3 Heart Rate Window Polar Function Emblem Polar strap Two heart rate sensors are on side not shown The transmitter is encased under the Polar logo HR Indicator Lights ...

Page 71: ...R LED lights 4 The display should show your heart rate within five seconds Troubleshooting 1 Inspect whether the Polar strap works on other equipment If it does not operate on any equipment try another Polar strap If it works on other equipment but not this unit proceed to the following 2 Inspect whether the wire from the Polar receiver board to the display is connected properly 3 Replace the Pola...

Page 72: ...ror Hold onto the HTR handlebar The display does not show any heart rate reading Do not hold onto the HTR handlebar The display shows a heart rate reading Or the heart rate reading is inaccurate Operation Diagram DISPLAY BOARD HTR BOARD HTR HANDLE BAR RIGHT HEART RATE SIGNAL HTR HANDLE BAR LEFT 6 6 1 ...

Page 73: ...eart rate board detects the HTR handlebar signal 2 The heart rate board sends the heart rate signal to the display 4 3 pin Cable 1 The signal from the heart rate board travels the 3 pin cable to the display 5 Display Board 1 The display CPU detects the heart rate signal 2 The display shows the heart rate value Possible Cause of Malfunction 1 HTR handlebars or wires are bad making it impossible for...

Page 74: ...ndlebars are held 2 If LED2 does not light inspect the HTR cable or handlebars 3 If LED2 lights but LED3 does not flash the issue is in the HTR board 4 If LED2 lights and LED4 flashes but LED5 does not flash indicating no output the HTR board is bad 5 If you do not hold onto the handlebar but the HTR LED4 flashes replace the HTR board 4 3 pin Cable 1 Inspect wire connections from the HTR board to ...

Page 75: ...lanation LED1 Red POLAR Heart Rate Flashes to indicate incoming POLAR heart rate signal LED2 Green HTR Handlebar Lights when someone holds the heart rate grips LED3 Orange HTR Heart Rate Flashes when the HTR signal enters the HTR board LED4 Red HTR Output Indicator Flashes when heart rate signal is output to the display 6 6 4 LED1 LED2 LED3 LED4 ...

Page 76: ...lanation LED1 Red POLAR Heart Rate Flashes to indicate incoming POLAR heart rate signal LED2 Green HTR Handlebar Lights when someone holds the heart rate grips LED3 Orange HTR Heart Rate Flashes when the HTR signal enters the HTR board LED4 Red HTR Output Indicator Flashes when heart rate signal is output to the display 6 6 4 LED1 LED2 LED3 LED4 ...

Page 77: ...played in the display PULSE window Troubleshooting If not as above see the troubleshooting chart shown below Order Condition Cause of Malfunction Associated Parts 1 D3 does not light POLAR receiver has no heart rate input POLAR transmitter POLAR receiver cables 2 D4 does not light HTR no one is holding the handlebar HTR handlebar Cable from handlebar to HTR board 3 D5 does not light No input from ...

Page 78: ... audible continuity setting 3 Test the HTR wires for shorts and breaks by placing probes as indicated below Test Point Normal A a Continuity B b Continuity C c Continuity D d Continuity Place the red probe on the wire Place the black probe on the HTR grip plates HTR board 5 pin cable Test Point Normal A GND No Continuity B GND No Continuity C GND No Continuity D GND No Continuity Frame GND No Cont...

Page 79: ...hooting Malfunction Fuse Breaks 1 Turn on unit power Display indicators do not light Main fuse is broken 2 Replace the fuse Turn on unit power again The fuse breaks again Operation Diagram DISPLAY BOARD DRIVE BOARD FUSE ON OFF SWITCH POWER CORD 6 7 1 ...

Page 80: ...oard component failure causes the fuse to break as soon as the unit is turned on 3 Other component failures might create high amp draw and cause the fuse to break Troubleshooting Inspect the fuse and fuse holder Bad fuse holders have been known to cause fuses to fail Disconnect the wire from the fuse to the drive board Put in a good fuse Turn on the unit If the fuse does not break replace the driv...

Page 81: ...oard component failure causes the fuse to break as soon as the unit is turned on 3 Other component failures might create high amp draw and cause the fuse to break Troubleshooting Inspect the fuse and fuse holder Bad fuse holders have been known to cause fuses to fail Disconnect the wire from the fuse to the drive board Put in a good fuse Turn on the unit If the fuse does not break replace the driv...

Page 82: ...er Part Description 1 Flywheel Pedal on the bike The flywheel rotates 2 Reed Switch When a magnet on the flywheel passes a reed switch the reed switch closes completing the circuit 3 Drive Board The reed switch signal travels to the drive board LED5 flashes The drive board sends the signal up the data cable to the display 4 Display Board The display receives the signal and its main IC calculates t...

Page 83: ...s on the ends of both reed switch wires Spin the flywheel When the magnet passes the reed switch the reed switch should activate a click sound can be heard the multimeter should beep indicating continuity If not replace the reed switch Confirm that the magnet attracts metal and the attractive side faces the reed switch 4 Data Cable Inspect the cable and connections On C51R inspect the hub board co...

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