1. Manuals
  2. Brands
  3. EFX Manuals
  4. Fitness Equipment
  5. C556
  6. Service manual

EFX C556 Service Manual

Self powered elliptical fitness crosstrainer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
C556 Self Powered Elliptical Fitness Crosstrainerl
C556 Self Powered Elliptical Fitness Crosstrainer
Warning: This service manual is for use by Precor trained service providers only.
If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product;
Call your dealer for service.
This document contains information required to perform the majority of troubleshooting, and
replacement procedures required to repair and maintain this product.
This document contains general product information, software diagnostic procedures (when
available), preventative maintenance procedures, inspection and adjustment procedures,
troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.
To move directly to a procedure, click the appropriate procedure in the bookmark section to the
left of this page. You may "drag" the separator bar between this page and the bookmark section
to change the size of the page being viewed.
© 2003 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
Page 1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the C556 and is the answer not in the manual?

Questions and answers

Summary of Contents for EFX C556

  • Page 1 C556 Self Powered Elliptical Fitness Crosstrainerl C556 Self Powered Elliptical Fitness Crosstrainer Warning: This service manual is for use by Precor trained service providers only. If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product;...

  • Page 2: Section One - Things You Should Know

    C556 Self Powered Elliptical Fitness Crosstrainer Section One - Things You Should Know Right, Left, Front, and Back Conventions In this manual, right, left, front, and back are from the perspective of a user standing on the C556, facing the display enclosure. General System Information •...

  • Page 3: General Information

    • When it is necessary to lift or move the EFX, ensure that the EFX has adequate support and that you use proper lifting techniques. Safety guidelines you should know and follow include: •...

  • Page 4: Section Two - Preventive Maintenance

    “Simple Green” is the only cleaning solution that has been tested and approved for use on the C556 ramps. Use of any other cleaner, may cause degradation of the ramp anodizing and void the ramp warranty. The use of an acid (citric) based cleaner will cause ramp anodizing damage and is not authorized by Precor.

  • Page 5: Quarterly Maintenance

    Check the step up and input belt alignment and tension as in Procedure 5.3. Replace the rear cover. On-Site Preventive Maintenance (Service Technician) When you are called to service a EFX, perform these preventive maintenance activities: • Perform the software diagnostics. Check LED and keypad function. Record the odometer reading.

  • Page 6: Procedure 3.1 - Software Access Codes

    See Diagram 3.1. The C556 display does not utilize key positions #2 and #3, however, they must be counted to correctly locate keys #4 through #6. On the C556 display key #1 is the RESET key and key #4 is the QUICK START key.

  • Page 7: Procedure 3.2 - Accessing The Diagnostic Program

    The message HEART RATE TEST will be displayed followed by the unfiltered (U), filtered (F) and polar (P) heart rate readings if the heart rate option is installed in the C556 and a chest strap transmitter or a test transmitter is being used. If the heart rate option is not installed in the C556, the message NO HEART RATE RECEIVER will be displayed instead of the heart rate readings.

  • Page 8: Procedure 3.3 - Displaying The Odometer

    The message HOUR METER will be displayed followed by the total number of hours that the C556 has been in use. Press the ENTER key to advance to software version. The message SOFTWARE VERSION will be displayed followed by the software versions of the upper and lower PCA’s.

  • Page 9: Procedure 3.4 - Club Settings

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 3.4 - Club Settings Start pedalling and continue to pedal as you perform step 2. Enter the club settings by pressing keys RESET,5,6,5,1,5,6,5, sequentially. The message SET CLUB PARAMETERS will be displayed for a few seconds.

  • Page 10: Procedure 3.5 - Documenting Software Problems

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 3.5 - Documenting Software Problems When a problem is found with either the software or upper or lower PCA’s, record the information listed below. If you isolated the problem to either the PROM, upper PCA, or lower PCA, include the information you recorded with the malfunctioning PROM or PCA when you ship it to Precor.
  • Page 11 Resistance Level 20. Operate the EFX for another 2–3 minutes. If the resistance of the EFX 556 does not change or the EFX operation feels inconsistent with Resistance Levels 1 and 10, troubleshoot per Procedure 6.6.

  • Page 12: Procedure 5.1 - Measuring The Resistance Of A Generator

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 5.1 - Measuring the Resistance of a Generator Caution Remove power from the EFX before you measure magnet resistance. Procedure Remove the rear cover and disconnect the red battery lead from terminal M6 of the lower PCA.

  • Page 13: Procedure 5.2 - Inspecting And Adjusting Belt Tension

    Section One, Things You Should Know. WARNING If the EFX has been in recent use, the load resistors and mounting bracket may be extremely hot. Remove the three screws that fasten the load resistor assembly and shield to the frame upright.
  • Page 14 C556 Self Powered Elliptical Fitness Crosstrainer both bolts equal amounts. When the adjustment is complete the step up pulley shaft must remain perpendicular to the frame and drive belt. Turning the adjustment bolts clockwise will increase belt tension, turning the adjustment bolts counter-clockwise will decrease belt tension.
  • Page 15 C556 Self Powered Elliptical Fitness Crosstrainerl If either the input pulley belt or the generator belt is being replaced with a new belt, the belt tension should be set 20 lbs. higher than the previous readings. Therefore a new input pulley belt should be tensioned to 120 lbs.

  • Page 16: Procedure 6.1 - Troubleshooting The Lower And Upper Interconnect Cables

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 6.1 - Troubleshooting the Lower and Upper Interconnect Cables Anti-static kits can be ordered from Precor (part number 20024-101). Troubleshooting the Upper Interconnect Cable WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know.
  • Page 17 C556 Self Powered Elliptical Fitness Crosstrainerl 12. Remove the four screws from the rear of the upper display housing. Remove the display housing front panel from the display housing. Disconnect the upper interconnect cable from the upper PCA. 13. Disconnect the upper interconnect cable from the mid-point connector. See Diagram 6.2 Diagram 6.2 - Mid-Point Connector...

  • Page 18: Procedure 6.2 - Troubleshooting The Keypad And Upper Pca

    Attach the anti-static wrist strap to your arm, then connect the ground lead of the wrist strap to the units frame. If the EFX powers up and functions normally until a particular key(s) is pressed, skip to step If a “key depressed” message is immediately displayed when the EFX is powered up, continue with the next step.
  • Page 19 If a “key depressed” message is immediately displayed when the EFX is powered up, replace the upper PCA. If a “key depressed” message is not displayed when the EFX is powered up, replace the display housing front panel. The display housing front panel is equipped with the keypad.

  • Page 20: Procedure 6.3 - Upper Display Does Not Illuminate

    If the optional external power supply is not equipped, skip to step 5. Disconnect the optional external power supply from the EFX and measure between the inner and outer sleeves of the power supply’s output jack with a DC voltmeter. You should measure approximately 18 VDC.
  • Page 21 C556 Self Powered Elliptical Fitness Crosstrainerl Diagram 6.4 - Partial View of Lower PCA J2 Connector TP20 10. Troubleshoot the upper to lower PCA interconnect cables per Procedure 6.1. 11. If the upper to lower interconnect cables are found to be good, replace the upper PCA.

  • Page 22: Procedure 6.4 - Troubleshooting The Generator

    Second, the generator is used to charge the EFX’s internal battery. Lastly, one of the generators three phase output windings is monitored to determine when the unit is in use and when it is idle. This system also determines the stride rate by determining the operating speed (output frequency) of the monitored generator winding.

  • Page 23: Procedure 6.5 - Troubleshooting Hand Held Heart Rate

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 6.5 - Troubleshooting Hand Held Heart Rate Circuit Description The hand held heart rate system is actually a dual system, that is, it can accept a heart rate signal from either the hand held heart rate contacts on the unit’s handlebar or from a Polar heart rate chest strap transmitter.
  • Page 24 C556 Self Powered Elliptical Fitness Crosstrainer Remove the display housing. Verify the internal chest strap setting is set as shown in Diagram 6.5. Verify that a ferrite bead is installed on the heart rate PCA to upper PCA cable. If the above procedures did not correct the problem, replace the heart rate PCA.
  • Page 25 C556 Self Powered Elliptical Fitness Crosstrainerl 15. Refer to Diagram 6.5 for the following measurements. With an ohmmeter measure between the “lower right contact” pin on the J1 connector and the lower right hand held heart rate contact on the handlebar. The reading should be 1 Ω or less. Measure between the “upper right contact”...

  • Page 26: Procedure 7.1 - Replacing The Mid-Point Cover

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.1 - Replacing the Mid-Point Cover WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. 26. Remove two screws that fasten the upper mid-point cover. Remove two screws that fasten the lower mid-point cover.

  • Page 27: Procedure 7.2 - Replacing The Display Enclosure Or Upper Pca

    Remove the four screws that secure the display housing front panel to the display backing plate. Attach the wrist strap to your arm, then connect the ground lead of the wrist strap to the EFX frame. Disconnect the upper interconnect cable from the upper PCA (connector J5).
  • Page 28 Reconnect the keyboard cable to the upper PCA. 10. Reconnect the upper interconnect cable to the upper PCA. 11. Remove the ground lead of the wrist strap from the EFX frame, then remove the wrist strap from your arm. 12. Position the display enclosure on the display plate. Replace and tighten the display mounting screws.

  • Page 29: Procedure 7.3 - Replacing The Lower Pca

    Section One, Things You Should Know. Remove the rear cover per Procedure 7.19. Attach the wrist strap to your arm, then connect the ground lead of the wrist strap to the EFX frame. Disconnect the all of cables and wiring from the lower PCA.
  • Page 30 M1 and M2, the polarity of the load leads is not critical, either lead may be connected to either the M1 or M2 terminal. Remove the ground lead of the wrist strap from the EFX frame, then remove the wrist strap from your arm.

  • Page 31: Procedure 7.4 - Replacing The Upper Or Lower Interconnect Cables

    Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Attach the wrist strap to your arm, then connect the ground lead of the wrist strap to the EFX frame. If you are replacing the lower interconnect cable, skip to step 11.
  • Page 32 15. Connect the new interconnect cable to the lower PCA. 16. Reconnect the red lead battery lead removed in step 1 and replace the rear cover. 17. Check the operation of the EFX as described in Section Four. Page 32...

  • Page 33: Procedure 7.5 - Replacing A Crankarm Assembly

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.5 - Replacing a Crankarm Assembly Removing a Crankarm Assembly WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. It is only necessary to remove the right or left side of the rear cover to access the crankarm being replaced.
  • Page 34 If you are replacing both crankarm assemblies, repeat steps 6 and 7 for the second crankarm assembly. Set the unit at it’s highest resistance setting and use the EFX for a minimum of 3 minutes. Stride in a forward direction for half of the time and in a backward direction for half of the time.

  • Page 35: Procedure 7.6 - Replacing The Input Pulley Belt

    12. Replace the stairarm assemblies per Procedure 7.12, steps, 11 to 12. 13. Tension both belts per Procedure 5.2. Note the differences between tensioning a new belt and a existing (used) belt. 14. Check the operation of the EFX as described in Section Four. Page 35...

  • Page 36: Procedure 7.7 - Replacing The Generator Pulley Belt

    12. Replace the stairarm assemblies per Procedure 7.12, steps, 11 to 12. 13. Tension both belts per Procedure 5.2. Note the differences between tensioning a new belt and a existing (used) belt. 14. Check the operation of the EFX as described in Section Four. Page 36...

  • Page 37: Procedure 7.8 - Replacing The Input Pulley Assembly

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.8 - Replacing the Input Pulley Assembly WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Remove the rear cover per Procedure 7.19.
  • Page 38 C556 Self Powered Elliptical Fitness Crosstrainer Remove the input pulley assembly. Slide input pulley belt off of the input pulley assembly. Hold the replacement input pulley assembly at it’s mounting position and slide the input belt over and past the pillow block bearing and onto the input pulley assembly.

  • Page 39: Procedure 7.9 - Replacing The Step-Up Pulley Assembly

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.9 - Replacing the Step-Up Pulley Assembly WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Remove the rear cover per Procedure 7.19.

  • Page 40: Procedure 7.10 - Replacing A Wheel Assembly

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.10 - Replacing a Wheel Assembly Procedure On February 2, 2004 the wheel assembly was modified to a wheel assembly utilizing larger bearings and a larger mounting bolts. If the wheel being replaced has large (5/16-18) mounting bolts, skip to step 7.
  • Page 41 C556 Self Powered Elliptical Fitness Crosstrainerl Remove the two wheel axle bolts from the wheel. Discard the bolts and the wheel. Replacement wheel mounting bolts are furnished with the replacement wheel. Install the replacement wheel assembly in the wheel cover. Install and hand tighten the two wheel axle bolts.

  • Page 42: Procedure 7.11 - Replacing A Stairarm Pedal

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.11 - Replacing a Stairarm Pedal Loosen and remove the two bolts that fasten the stairarm pedal onto the stairarm. Remove the stairarm pedal from the stairarm. Set the replacement stairarm pedal at it’s mounting position on the stairarm.

  • Page 43: Procedure 7.12 - Replacing A Stairarm

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.12 - Replacing a Stairarm Remove the rear cover and disconnect the red battery lead from terminal M6 of the lower PCA. Remove the three bolts that fasten the pivot arm connector to the stairarm. See Diagram 7.7.
  • Page 44 C556 Self Powered Elliptical Fitness Crosstrainer Remove the four screws that fasten the wheel assembly to the stairarm. Remove the wheel assembly from the stairarm. 10. Install the wheel assembly on the replacement stairarm. Install and hand tighten the four the four screws removed in step 9.

  • Page 45: Procedure 7.13 - Replacing A Ramp Assembly

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.13 - Replacing a Ramp Assembly Procedure Remove the rear cover and disconnect the red battery lead from terminal M6 of the lower PCA. Remove the three bolts that fasten each pivot arm connector to the stairarm. See Diagram 7.7.
  • Page 46 C556 Self Powered Elliptical Fitness Crosstrainer Diagram 7.9 - Front Ramp Mounting Ramp End Cap Mounting Bolt Remove the ramp from the EFX. Slide the ramp end cap into the ramp assembly. Fasten the ramp end cap with the screws removed in step 4.

  • Page 47: Procedure 7.14 - Replacing A Handlebar

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.14 - Replacing a Handlebar Remove the four screws that fasten the handlebar to the upper pivot arm. Diagram 7.10 - Handlebar Mounting Handlebar Mounting Screw Set the replacement handlebar in it’s mounting position. Hand start the four mounting screws.

  • Page 48: Procedure 7.15 - Replacing A Stairarm Connector

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.15 - Replacing a Stairarm Connector WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Remove the three bolts that fasten the pivot arm connector to the stairarm. See Diagram 7.11.

  • Page 49: Procedure 7.16 - Replacing A Lower Pivot Arm

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.16 - Replacing a Lower Pivot Arm WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Remove the retaining ring that fastens the lower pivot arm to the stairarm connector. See Diagram 7.12.

  • Page 50: Procedure 7.17 - Replacing An Upper Pivot Arm

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.17 - Replacing an Upper Pivot Arm WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know. Remove the bolt that fastens the upper pivot arm to the lower pivot arm. See Diagram 7.12.

  • Page 51: Procedure 7.18 - Replacing The Upper Main Column

    Section One, Things You Should Know. Remove the mid-point cover per Procedure 7.1. Attach the wrist strap to your arm, then connect the ground lead of the wrist strap to the EFX frame. Carefully reach into the access hole in the lower front of the upper main column and extract the interconnect cables.
  • Page 52 C556 Self Powered Elliptical Fitness Crosstrainer Feed the upper interconnect cable into the replacement upper main column and fasten the display housing to the replacement upper main column with the screws removed in step 7. Draw the upper interconnect cable out of the access hole at the bottom of the upper main column as shown in Diagram 7.14.

  • Page 53: Procedure 7.19 - Replace The Rear Cover

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.19 - Replace the Rear Cover The rear cover is a four piece cover; front, top, left and right sections. If the front cover section is being removed, the frame cover must also be removed (See Diagram 7.15).
  • Page 54 C556 Self Powered Elliptical Fitness Crosstrainer Diagram 7.16 - Top Cover Section (with right & left cover sections removed) Top Cover Section Mounting Screw Front Cover Frame Section Upright If all four cover sections have been removed, first replace the frame cover and front cover section, then the top cover section and then the left and right cover sections as described below.

  • Page 55: Procedure 7.20 - Replacing A Load Resistor

    Procedure 7.20 - Replacing a Load Resistor Warning When the EFX is operated the load resistors get very hot. Be sure to allow the load resistors enough time to cool before continuing with this procedure. Remove the rear cover and disconnect the red battery lead from terminal M6 of the lower PCA.
  • Page 56 Route the load resistor wires into the slots at the top of the frame upright. This will keep the wires away from all moving parts, such as the stairarms. Reconnect the red battery lead removed in step 1 and replace the cover. 10. Check the operation of the EFX as described in Section Four. Page 56...

  • Page 57: Procedure 7.21 - Replacing A Generator

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.21 - Replacing a Generator WARNING When the unit is used, stairarms are in motion or the generator is rotated by any means, the generator will produce potentially hazardous voltages even when the battery is disconnected.
  • Page 58 When the generator belt tension is correct, torque the four generator mounting bolts to 150 inch pounds. Securely tighten the forward nut on the adjustment bolt. Reconnect the red battery lead removed in step 1 and replace the rear cover. 10. Check the operation of the EFX as described in Section Four. Page 58...

  • Page 59: Procedure 7.22 - Replacing A Battery

    C556 Self Powered Elliptical Fitness Crosstrainerl Procedure 7.22 - Replacing a Battery Remove the rear cover Disconnect the red battery lead from terminal M6 of the lower PCA and the black battery lead from M7 of the lower PCA and the green/yellow frame ground lead from M8 of the lower PCA.
  • Page 60 M7 of the lower PCA. Reconnect the red battery lead to terminal M6 of the lower PCA. 11. Replace the rear cover. 12. Check the operation of the EFX as described in Section Four. Page 60...

  • Page 61: Procedure 7.23 - Replacing A Power Input Jack Assembly

    J4 connector on the lower PCA. Reconnect the red wire battery lead, removed in step 1, to the positive (+) terminal of the battery. 10. Replace the rear cover. 11. Check the operation of the EFX as described in Section Four. Page 61...

  • Page 62: Procedure 7.24 - Replacing The Prom

    C556 Self Powered Elliptical Fitness Crosstrainer Procedure 7.24 - Replacing the PROM Anti-static kits (part number 20024-101) can be ordered from Precor. The PROM and the associated printed circuit assembly (PCA) are static sensitive. Anti- static devices must be used and all anti-static precautions must be followed during this procedure.

  • Page 63: Wiring Diagram 8.1 - C556 Self Powered

    C556 Self Powered Elliptical Fitness Crosstrainerl Wiring Diagram 8.1 - C556 Self Powered 20 Ohm, 300W Load Resistor Page 63...

  • Page 64: Block Diagram 8.2 - C556 Self Powered

    C556 Self Powered Elliptical Fitness Crosstrainer Block Diagram 8.2 - C556 Self Powered Page 64...

Table of Contents