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5.17 Elliptical Fitness Crosstrainer

Page 23

Procedure 5.5 - Troubleshooting the Magnetic Resistance

System

Note:

If the control circuit does not see an output from the speed sensor, the mechanism that changes
the resistance level is disabled. Therefore, the speed sensor must be operative and the unit must
be in use, before the resistance level can be changed. The resistance level is changed by
varying the proximity of the pairs of permanent magnets relative to an eddy current disk.The
magnet assembly’s position (relative to the eddy current disk) is varied by a gear motor and a
motor position controller. When the EFX is powered up (turned on), the magnet assembly
retracts until it operates the home switch. Once the home switch is activated the magnet
assembly moves to the resistance level 1 position. An infrared photo optic sensor is used to
determine the magnet assembly position during any subsequent resistance levels changes. The
target consists of alternate silver (reflecting) and black (non-reflecting) surfaces. The target is
attached to the gear motor and is rotated in front of the infrared sensor. The gear motor and
subsequent magnet assembly position is determined by counting the pulses from the infrared
sensor (See Diagram 5.3). Error codes 53, 54 and 55 are associated with the magnetic
resistance system. Error 53 will occur if the system does not receive pulses from the target at
start up or the system can not find the home switch at start up. Error 54 occurs when pulses from
the target are lost during operation. Error 55 occurs if the home switch is actuated at an
unexpected time.

Diagram 5.3 - Magnetic Resistance System

1.

There is only one common failure mode of the magnetic resistance system, the resistance

Eddy Current

Disk

Magnet

Assembly

Home

Switch

Gear Motor

«
...
21
22
23
24
25
...
»

Содержание 5.17

Страница 1: ...and maintain this product This document contains general product information software diagnostic procedures when available preventative maintenance procedures inspection and adjustment procedures tro...

Страница 2: ...g a normal pulse from the reed switch speed sensor The 5 17 EFX operates from a 12 Vdc source An AC to DC power adapter is provided with the EFX See Diagram 1 1 Diagram 1 1 Power Adapter Right Left Fr...

Страница 3: ...a result of the current activity Caution statements included in this manual are listed below Notice the orientation notch on the PROM These components must be positioned with the same notch orientatio...

Страница 4: ...following list is a summary of the tools and equipment required when you service Precor s EFX 5 17 TOOLS EQUIPMENT phillips and flat head screwdrivers anti static wrist strap digital multimeter standa...

Страница 5: ...following preventive maintenance schedule At the End of Each Day Wipe down the stairarms ramps wheels and frame with a damp cloth Every Week Wipe the surface of the electronic console with a slightly...

Страница 6: ...FX for another 2 3 minutes 6 If the EFX resistance does not change or the operation of the EFX feels inconsistent compared with Resistance Level 1 troubleshoot per section 6 7 Press the RESISTANCE key...

Страница 7: ...tmeter between the blue and brown wires of the lift motor connector Set the on off switch in the on position Operate the ramp until the DC voltmeter reading is as close to 1 1 VDC as possible Set the...

Страница 8: ...he holes in the lift nut with the holes in the ramp Replace both lift nut mounting pins Replace both retaining clips on the lift nut mounting pins 7 Set the on off switch in the on position Thoroughly...

Страница 9: ...end the locking tabs out of the way so that the bolts can be turned 6 If the step up pulley belt is out of alignment to the right continue with step 8 7 If the step up pulley belt is out of alignment...

Страница 10: ...gauge Slide one of the o rings up against the shoulder of the belt gauge Press downward on the belt gauge causing the belt to deflect Read the deflection on the belt gauge at the edge of the straight...

Страница 11: ...1 2 deflection The belt tensioning gauge reads Turn both tension bolts more than 16 pounds counterclockwise in equal quarter turn increments until the belt tensioning gauge reads 14 16 pounds 1 2 def...

Страница 12: ...n the stub tensioner axle nut slightly If necessary insert a lever such as a large flat bladed screwdriver into the sub tensioner adjustment slot and carefully move the stub tensioner until the distan...

Страница 13: ...on position Do not release the RESET key 3 Four eights will be displayed Check to ensure that all of the display segments are illuminated 4 While continuing to depress the RESET key press each of the...

Страница 14: ...es are joined Carefully slide the front half of the frame away from the rear half of the frame 4 Remove the rear cover For convenience the upper interconnect cable is the cable that attaches to the up...

Страница 15: ...e lower interconnect cable was installed THEN OTHERWISE The original interconnect cable is bad The original interconnect cable is good install a new interconnect cable as continue with the next step d...

Страница 16: ...statements listed in Section One of the Residential Treadmill Service Manual 2 Remove the screws that secure the upper display assembly to the upper handrail Carefully pull some excess interconnect c...

Страница 17: ...ole press read between Pin 3 of J2 SELECT ENTER 0 Vdc and 500 mVdc Pin 4 of J2 CROSSRAMP 0 Vdc and 500 mVdc Pin 5 of J2 CROSSRAMP 0 Vdc and 500 mVdc Pin 7 of J2 PAUSE RESET 0 Vdc and 500 mVdc Pin 8 of...

Страница 18: ...wrist strap from the treadmill frame then remove the wrist strap from your arm 12 Position the display enclosure on the display plate Install the screws that secure the display enclosure to the displ...

Страница 19: ...ngs You Should Know Procedure 1 Remove the rear covers Set the on off switch in the on position Operate the unit If the system timer has not started and a stride rate is not displayed the speed sensor...

Страница 20: ...voltmeter connected to terminals 1 and 2 of J2 on the lower PCA rock the step up disk forward and backward so that the magnet is passing in front of and away from the reed switch The DC voltmeter sho...

Страница 21: ...e open or significantly high or low continue with step 4 If all three measurements are correct skip to step 8 4 Remove the four bolts that fasten the rear and forward halves of the frame together and...

Страница 22: ...rt the J6 connector in the lower PCA Set the on off switch in the on position Using an DC voltmeter connect the positive meter lead to terminal 2 of J6 and the negative meter lead to terminal 3 of J6...

Страница 23: ...1 position An infrared photo optic sensor is used to determine the magnet assembly position during any subsequent resistance levels changes The target consists of alternate silver reflecting and black...

Страница 24: ...om the gear motor Measure the resistance of the gear motor winding measure between the terminal with the red lead on it and the terminal that the black wire was removed from The resistance should be a...

Страница 25: ...replace the target Diagram 5 4 Lower PCA 15 If necessary move the magnet assembly so that it is not in contact with the home switch Set the on off switch in the off position Remove both wires from the...

Страница 26: ...e home switch wiring is good replace the lower PCA 19 If you have performed all of the above tests and the magnetic resistance system still does not function properly call Precor Technical Support 20...

Страница 27: ...solve the problem contact Precor customer support 8 Replace the F1 and F2 fuses in the lower PCA perform the resistance measurement in step 4 The reading should be approximately 2 megohms or greater 9...

Страница 28: ...position the rear covers at their mounting positions Replace the 6 screws that secure the rear cover to the frame Replace the 7 screws that secure the rear cover halves Removing and Replacing the Fron...

Страница 29: ...motor Do not allow the lift motor nut to rotate on the lift motor If the lift motor nut rotates the lift motor must be re calibrated per Procedure 4 1 steps 4 and 5 11 Remove and replace the rear cov...

Страница 30: ...the cover support bracket at it s mounting position and replace and tighten both cover support bracket mounting screws 15 Reconnect the lift motor cable to lift motor interconnect cable 16 Set the fr...

Страница 31: ...hout replacing the upper PCA THEN OTHERWISE Skip to Step 14 Continue with the next step Removing and Replacing the Upper PCA or Display Enclosure 6 Carefully disconnect the keypad cable from the upper...

Страница 32: ...closure Mounting Diagram 6 4 Upper PCA 14 Position the display enclosure on the display backplate Replace and tighten the display mounting screws 15 Check EFX operation as described in Section Three D...

Страница 33: ...ckage PLCC44 Each of these packages should be removed with a proper IC removal tool see the illustrations below 4 The IC s may inserted into their socket by hand by carefully aligning the notch on the...

Страница 34: ...6 1 3 Attach an anti static wrist strap to your arm then connect the ground lead of the wrist strap to the EFX frame 4 Remove the shield from the lower PCA 5 Disconnect the cables from the lower PCA...

Страница 35: ...ables disconnected in Step 5 See Diagram 6 5 10 Install the lower PCA shield 11 Remove the ground lead of the wrist strap from the EFX frame then remove the wrist strap from your arm 12 Re install the...

Страница 36: ...the upper PCA 5 Remove the four bolts that fasten the front half of the frame to the rear half of the frame Carefully separate the two frame halves Disconnect the upper interconnect cable from the low...

Страница 37: ...f the existing lower interconnect cable Carefully pull the existing interconnect cable out of the lower PCA access hole When the replacement cable appears out of the lower PCA access hole untape and d...

Страница 38: ...ed wires from on off switch and the red and black wires from the capacitor Disconnect the red wire from J4 of the lower PCA and the black wire from J5 of the lower PCA Remove and discard the input pow...

Страница 39: ...Elliptical Fitness Crosstrainer Page 39 8 Plug the power adapter into an AC outlet and to the EFX 9 Set the on off switch in the on position and check the operation of the EFX as described in Section...

Страница 40: ...ation of the negative and positive terminals of the capacitor Loosen the clamping screw on the capacitor bracket and slide the capacitor out of the capacitor bracket 5 Slide the replacement capacitor...

Страница 41: ...Remove the rear covers as described in Procedure 6 1 3 Disconnect the wiring from the on off switch 4 Depress the mounting tabs that secure the switch to its mounting bracket Remove the switch from i...

Страница 42: ...pins from the lift nut Raise the ramp and support it from the handlebars using a bungi cord See Diagram 4 1 Diagram 6 8 Lift Motor Mounting 3 Disconnect the lift motor cable from the lift motor inter...

Страница 43: ...tate the lift nut any more than is necessary to align the holes in the lift nut with the holes in the ramp Replace both lift nut mounting pins Replace both retaining clips on the lift nut mounting pin...

Страница 44: ...e the stairarm assembly as described in Procedure 6 22 Note Notice the position of the two crank arms When the crankarms are replaced they must be positioned so that they are 180 degrees opposing 4 Re...

Страница 45: ...orque the nut to 300 in lbs 8 Replace the stairarm assembly as described in Procedure 6 22 9 If you are replacing both crankarm assemblies repeat steps 6 and 7 for the second crankarm assembly 10 Set...

Страница 46: ...block bearings See Procedure 6 10 5 Remove tension from the input pulley and step up pulley belts as described below a Loosen the stub tensioner axle nut and remove the tension from the input belt Se...

Страница 47: ...k mounting nuts to 200 in lbs 8 Align and tension the step up and input belts per Procedure 4 2 9 Replace the crankarm s per Procedure 6 10 If both crankarms have been removed the crankarm with the ma...

Страница 48: ...assemblies as described in Procedure 6 22 4 Remove the crankarm assemblies as described in Procedure 6 10 5 Remove tension from the drive belts and remove the pillow block bearings per Procedure 6 11...

Страница 49: ...input belts onto the input pulley shaft as you set the input pulley shaft in it s mounting position in the drive unit 10 Slide the pillow block bearings onto the input pulley shaft 11 Complete the in...

Страница 50: ...the input pulley shaft and remove the input pulley and eddy current disc assembly from the drive unit See Diagram 6 10 7 Carefully lay the EFX on it s side Remove the bolts that retain mounting plate...

Страница 51: ...input belts onto the input pulley shaft as you set the input pulley shaft in it s mounting position in the drive unit 12 Slide the pillow block bearings onto the input pulley shaft 13 Complete the in...

Страница 52: ...p and input belts off of the input pulley shaft and remove the input pulley and eddy current disc assembly from the drive unit See Diagram 6 10 7 Remove the left and right tension bolts locking tabs a...

Страница 53: ...ainer Page 53 Diagram 6 13 Step Up Pulley Belt 11 Slide the pillow block bearings onto the input pulley shaft 12 Complete the installation alignment and tensioning per Procedure 6 11 steps 8 to 13 Ste...

Страница 54: ...re 6 11 steps 4 to 7 6 Carefully lay the EFX on it s side Remove the bolts that retain mounting plate for the input module and on off switch Swing the mounting plate away from the drive unit 7 Slide t...

Страница 55: ...6 12 6 13 7 Remove the left and right tension bolts locking tabs and brackets 8 Carefully lay the EFX on it s side Remove the bolts that retain mounting plate for the input module and on off switch Sw...

Страница 56: ...ar covers as described in Procedure 6 1 3 Disconnect the speed sensor cable from the lower PCA See Diagram 6 5 4 Remove the hardware that secures the speed sensor assembly to the drive unit Diagram 6...

Страница 57: ...5 17 Elliptical Fitness Crosstrainer Page 57 8 Re install the rear covers as described in Procedure 6 1 then check the operation of the EFX as described in Section Three...

Страница 58: ...ocedure review the Warning and Caution statements listed in Section One Things You Should Know 3 Remove the rear covers as described in Procedure 6 1 4 Attach an anti static wrist strap to your arm th...

Страница 59: ...ance from the edge of the follower to the end of the shaft is 1 5 16 inches See Diagram 6 16 Diagram 6 16 Follower Positioning 12 Slide the replacement magnet assembly onto the extension shaft followe...

Страница 60: ...ly press the target disk onto the gear motor extension shaft 15 Set the lower PCA in it s mounting position and replace the mounting screws removed in step 7 Reconnect the lower PCA cables as shown in...

Страница 61: ...One Things You Should Know 2 Remove the rear cover as described in Procedure 6 1 3 Remove the mounting bolt and nut that fastens the stairarm pivot block to the stairarm See Diagram 6 17 4 Slide the s...

Страница 62: ...o the crankarm pin and replace the retaining ring removed in step 5 7 Slide the stairarm onto the stairarm pivot block Install and hand tighten the stairarm pivot block mounting hardware Torque the st...

Страница 63: ...e end of the axle from which the screw has been removed The allen wrench will hold the axle while you remove the remaining screw Remove the wheel assembly from the stairarm Diagram 6 18 Wheel Assembly...

Страница 64: ...t the axle through the wheel and into the bearing that is pressed into the wheel Slide the remaining bearing over the axle and press the bearing into the wheel by hand Be sure that both bearing are fu...

Страница 65: ...remove the two bolts that fasten the stairarm pedal onto the stairarm 3 Remove the stairarm pedal from the stairarm 4 Set the replacement stairarm pedal at it s mounting position on the stairarm 5 In...

Страница 66: ...en removing the second wheel axle screw the axle rotates and the screw does not unthread insert a 5 32 allen wrench into the end of the axle from which the screw has been removed The allen wrench will...

Страница 67: ...lift mounting pins from the lift nut Raise the ramp and support it from the handlebars using a bungi cord See Diagram 4 1 Do not allow the lift motor nut to rotate If the lift motor nut is allowed to...

Страница 68: ...han is necessary to align the holes in the lift nut with the holes in the ramp Replace both lift nut mounting pins Replace both retaining clips on the lift nut mounting pins 8 Set the on off switch in...

Страница 69: ...ting bolts Diagram 6 22 Handlebar Mounting 4 Slide the lower end of the handlebar off of the frame and then slide the upper end of the handlebar out of the upper handlebar clamp Replacing a Handlebar...

Страница 70: ...ments listed in Section One Things You Should Know 2 Remove the rear covers as described in Procedure 6 1 3 Remove the stub tensioner mounting bolt remove the stub tensioner 4 Set the replacement stub...

Страница 71: ...ure 6 18 steps 4 10 4 Remove the red and black wires from the gear motor 5 Remove the set screw from the gear motor extension shaft See Diagram 6 23 Diagram 6 23 Gear Motor Mounting 6 Remove the nuts...

Страница 72: ...Crosstrainer Page 72 10 Replace the magnet assembly and lower PCA per Procedure 6 18 steps 11 17 11 Re install the rear covers as described in Procedure 6 1 then check the operation of the EFX as des...

Страница 73: ...5 17 Elliptical Fitness Crosstrainer Page 73 Wiring Diagram 7 1 5 17...

Страница 74: ...5 17 Ellipitical Fitness Crosstrainer Page 74 Block Diagram 7 2 5 17...

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