CYBEX LCX-425T Service Manual
Cybex LCX-425T Treadmill
Service Manual
Cardiovascular Systems
Part Number LT-19638 Rev C
www.cybexinternational.com
Cybex LCX-425T Treadmill
Service Manual
Cardiovascular Systems
Part Number LT-19638 Rev C
Cybex® and the Cybex logo are registered trademarks of Cybex International, Inc. Polar® is a registered trademark of
Polar Electro Inc.
DISCLAIMER: Cybex International, Inc. makes no representations or warranties regarding the contents of this manual. We reserve
the right to revise this document at any time or to make changes to the product described within it without notice or obligation to
notify any person of such revisions or changes.
© 2007, Cybex International, Inc. All rights reserved. Printed in United States of America.
10 Trotter Drive Medway, MA 02053 • 888-462-9239 • 508-533-4300 • FAX 508-533-5183
www.cybexinternational.com • techhelp@cybexintl.com • techpubs@cybexintl.com • LT-19638 • Rev C • September 2007
Cybex 425T Treadmill Service Manual
About This Manual
An Owner’s Manual is shipped with each unit. To purchase additional copies of this manual or
any other Cybex manual, please do one of the following:
• order online at www.cybexinternational.com
• fax your order to 508-533-5183
• contact Cybex Customer Service at 888-462-9239
• or contact Cybex Customer Service at 508-533-4300
NOTE: Refer to www.cybexinternational.com for changes and updates to this manual.
To contact Cybex with comments about this manual you may send email to techpubs@
cybexintl.com.
FCC Compliance Information
! WARNING: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate
the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception (which can be determined by
turning the equipment off and on) the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio TV technician for help.
Page i
Cybex 425T Treadmill Service Manual
DECLARATION OF CONFORMITY August 24, 2006
This Declaration of Conformity is suitable to the European Standard EN 45014, “General criteria for
supplier’s declaration of conformity.”
We,
Manufacturer: Cybex International, Inc. EU Representative: Cybex International UK
10 Trotter Drive Oaktree House
Medway, MA 02053 Atherstone Road
USA Measham
(508) 533-4300 Swadlincote, Derbyshire DE12 7EL
United Kingdom
+44 (0)845 60 60 228
declare under our sole responsibility that the product(s):
Cybex 425T Treadmill
to which this declaration relates is in conformity with the EEC directives listed herein below
(including any and all relevant modifications):
73/23/EEC Low Voltage Directive
89/336/EEC Electromagnetic Compatibility
2002/95/EC Restriction of Hazardous Substances (RoHS) Directive
Page ii
Art Hicks
Chief Operating Officer
Cybex International, Inc.
10 Trotter Drive
Medway, MA 02053
Worldwide Headquarters 10 Trotter Drive + Medway, MA 02053, USA + t 508.533.4300 + f 508.533.5500
151 24th Avenue NW + Owatonna, MN 55060, USA + t 507.455.0217 + f 507.455.3446
Cybex 425T Treadmill Service Manual
As a result of test reports and their evaluation by accredited laboratories, we are in possession of the
following certificates for products which carry this marking:
Canada, USA
UL Std. No. 1647, FCC Part 15
Subpart B Class B
CAN/CSA-C22.2 No.68-92/99,
European Union 73/23/EEC, 89/336/EEC
References of harmonized standards on which this declaration of conformity is based:
EN 61000-6-1:2001 Electromagnetic Compatibility (EMC) Generic Immunity: Residential, Commercial
and Light Industrial
EN 61000-4-2 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test
EN 61000-4-3 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques Radiated, radio frequency, and electromagnetic field immunity test
EN 61000-4-4 Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques Section 4: Electrical fast transient/burst immunity test
EN 61000-4-5 Electromagnetic compatibility (EMC)- Part 4-5: Testing and measurement techniques Surge immunity test
EN 61000-4-6 Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields
EN 61000-4-11 Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests
Worldwide Headquarters 10 Trotter Drive + Medway, MA 02053, USA + t 508.533.4300 + f 508.533.5500
151 24th Avenue NW + Owatonna, MN 55060, USA + t 507.455.0217 + f 507.455.3446
Page iii
Cybex 425T Treadmill Service Manual
EN 61000-3-2 Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current <= 16A per phase)
EN 61000-3-3 Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current <=
16 A per phase and not subject to conditional connection
EN 60335-1:2002 +A11:2004 +A1:2004 “Safety of Household and Similar Electrical Appliances”
EN 55022: 1998 (CISPR 22:1997), Class B Limits and Methods of Measurement of Radio Interference
Characteristics of Information Technology Equipment.
EN 957-6: Stationary training equipment: Treadmills, additional specific safety requirements and test
methods
ASTM F 2115: Standard for Motorized Treadmills
FCC Part 15, Subpart B - Class B Radiated and Conducted Emissions
CAN/CSA-C22.2 No. 68-92 (Reaffirmed 1999) “Motor-Operated Appliances (Household and
Commercial)”
ANSI / UL-1647 3rd Edition, March 28, 1997 Rev. May 9, 2006 Motor Operated Massage and Exercise
Machines
Page iv
Worldwide Headquarters 10 Trotter Drive + Medway, MA 02053, USA + t 508.533.4300 + f 508.533.5500
151 24th Avenue NW + Owatonna, MN 55060, USA + t 507.455.0217 + f 507.455.3446
Cybex 425T Treadmill Service Manual
Table of Contents
Front Pages
About this Manual . . . . . . . . . . . . . . . . . . i
FCC Compliance Information . . . . . . . . . . i
Declaration of Conformity . . . . . . . . . . . . ii
Table of Contents . . . . . . . . . . . . . . . . . . . v
1 Safety
Important Voltage Information . . . . . . . 1-1
Grounding Instructions . . . . . . . . . . . . . 1-1
Important Safety Instructions . . . . . . . . 1-2
Warning Decals . . . . . . . . . . . . . . . . . . 1-4
Caution Decals . . . . . . . . . . . . . . . . . . . 1-7
Emergency Stop Key (e-stop) . . . . . . . 1-7
2 Preventive Maintenance
Warnings/Cautions . . . . . . . . . . . . . . . . 2-1
Regular Maintenance Activities . . . . . . 2-1
Cleaning Your Treadmill . . . . . . . . . . . . 2-1
Running Belt Maintenance . . . . . . . . . . 2-3
Other Preventive Maintenance . . . . . . . 2-5
Service Schedule . . . . . . . . . . . . . . . . . 2-6
3 Customer Service
Contacting Service . . . . . . . . . . . . . . . . 3-1
Serial Number and Voltage . . . . . . . . . 3-1
Return Material Authorization (RMA) . . 3-2
Damaged Parts. . . . . . . . . . . . . . . . . . . 3-2
Ordering Parts . . . . . . . . . . . . . . . . . . . 3-3
4 Service
Warnings/Cautions . . . . . . . . . . . . . . . . 4-1
Test Mode . . . . . . . . . . . . . . . . . . . . . . 4-2
LED Functions . . . . . . . . . . . . . . . . . . . 4-3
Key Functions. . . . . . . . . . . . . . . . . . . . 4-3
Error Codes . . . . . . . . . . . . . . . . . . . . . 4-4
Motor Current and Voltage. . . . . . . . . . 4-4
Speed Sensor Adjustment . . . . . . . . . . 4-5
Speed Calibration. . . . . . . . . . . . . . . . . 4-6
Running Belt and Deck . . . . . . . . . . . . 4-7
End Caps . . . . . . . . . . . . . . . . . . . . . . . 4-8
Rear Roller . . . . . . . . . . . . . . . . . . . . . . 4-9
Front Roller . . . . . . . . . . . . . . . . . . . . . 4-10
Drive Belt . . . . . . . . . . . . . . . . . . . . . . 4-10
Motor Brushes 110 VAC. . . . . . . . . . . 4-12
Motor Brushes 220 VAC. . . . . . . . . . . 4-16
Drive Motor. . . . . . . . . . . . . . . . . . . . . 4-18
Lower Control Board . . . . . . . . . . . . . 4-20
Power Cord . . . . . . . . . . . . . . . . . . . . 4-22
Circuit Breakers . . . . . . . . . . . . . . . . . 4-23
Line Filter . . . . . . . . . . . . . . . . . . . . . . 4-24
Elevation Motor . . . . . . . . . . . . . . . . . 4-26
Upper Display Board . . . . . . . . . . . . . 4-28
Display Overlays . . . . . . . . . . . . . . . . . 4-29
Contact Heart Rate Grips. . . . . . . . . . 4-30
E-Stop Switch . . . . . . . . . . . . . . . . . . 4-31
Display Cable . . . . . . . . . . . . . . . . . . . 4-32
Parts List. . . . . . . . . . . . . . . . . . . . . . . 4-36
Exploded View . . . . . . . . . . . . . . . . . . 4-39
Schematic. . . . . . . . . . . . . . . . . . . . . . 4-40
Page v
Cybex 425T Treadmill Service Manual
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Page vi
Cybex 425T Treadmill Service Manual
1 - Safety
IMPORTANT: Read all instructions and warnings before using the treadmill.
Important Voltage Information
Before plugging the power cord into an electrical outlet, verify that the voltage requirements
for your area match the voltage of the treadmill that you have received. The power
requirements for the Cybex 425T treadmill include a grounded, dedicated circuit, rated for
one of the following: 115 VAC ±5%, 60 Hz and 15 amps; 208/220 VAC, 60 Hz and 10 amps
or 230 VAC ±5%, 50 Hz and 10 amps. See the serial number decal for the exact voltage
requirements of your treadmill.
! WARNING: Do not attempt to use this unit with a voltage adapter. Do not attempt to
use this unit with an extension cord.
! WARNING: Do not plug more than one unit into a single circuit.
Grounding Instructions
This treadmill must be grounded. If it should malfunction or break down, grounding provides
a path of least resistance for electric current to reduce the risk of electric shock. This product
is equipped with a cord having an equipment-grounding conductor and a grounding plug.
The plug must be plugged into an appropriate outlet that is properly installed and grounded in
accordance with all local codes and ordinances.
! DANGER:
Improper connection of the equipment-grounding conductor can result in a risk of
electric shock. Check with a qualified electrician or service provider if you are in doubt
as to whether the treadmill is properly grounded. Seek a qualified electrician to perform
any modifications to the cord or plug. Cybex is not responsible for injuries or damages
as a result of cord or plug modification.
This treadmill is for use on a nominal 115
VAC ±5%, 60 Hz and 15 amps, 208/220
VAC; 60 Hz, 10 amps or 230 VAC ±5%, 50
Hz and 10 amps and a grounded, dedicated
circuit. Make sure that the treadmill is
connected to an outlet having the same
configuration as the plug. Do not use a
ground plug adapter to adapt the power
cord to a non-grounded outlet.
115V Euro Plug 208/220V UK
NEMA 5-15 CEE 7/7 NEMA 6-15 230VAC
Safety
Page 1-1
Cybex 425T Treadmill Service Manual
Important Safety Instructions
(Save These Instructions)
! DANGER: To reduce the risk of electric shock, always unplug this treadmill from the
electrical outlet immediately after using it and before cleaning it.
! WARNING: Serious injury could occur if these precautions are not observed. To reduce
the risk of burns, fires, electric shock, or injury:
User Safety Precautions
• DO NOT wear loose or dangling clothing while using.
• Use the treadmill handrails for support and to maintain balance.
• Stop exercising if you feel faint, dizzy, or experience pain at any time and consult your
physician.
• Obtain a medical exam before beginning any exercise program.
• Read and understand emergency stop procedures.
• Replace any warning labels if damaged, worn or illegible.
• Report any malfunctions, damage or repairs to the facility.
• Place your feet on the two top steps when starting or stopping the treadmill.
• Stop and place the treadmill at 0 degrees incline (level) after each use.
• Keep children away from the treadmill. Teenagers and disabled persons must be
supervised.
• Obtain instruction before using.
• Keep all body parts, towels, and the like free and clear of moving parts.
• Read and understand the Owner’s Manual and all warnings posted on the unit before using.
• DO NOT use the unit if you exceed 350 lbs. (158 kg). This is the rated maximum user weight.
• Disconnect power before servicing.
Safety
Page 1-2
Facility Safety Precautions
• Instruct all users on how to clip the e-stop clip onto their clothing and carefully test it prior
to using the treadmill.
• Instruct all users to use caution when mounting and dismounting the treadmill.
Cybex 425T Treadmill Service Manual
• Use a dedicated line when operating the treadmill. NOTE: A dedicated line requires one
circuit breaker per unit.
• Connect the treadmill to a properly grounded outlet only.
• DO NOT operate electrically powered treadmills in damp or wet locations.
• Keep the running belt clean and dry at all times.
• DO NOT leave the treadmill unattended when plugged in and running. NOTE: Before
leaving the treadmill unattended, always wait until the treadmill comes to a complete
stop and is level. Then remove the plug from the outlet. Remove the e-stop key from the
treadmill.
• Immobilize the treadmill (when not in use) by removing the e-stop key.
• Inspect the treadmill for worn or loose components before each use. Do not use until worn
or damaged parts are replaced.
• Maintain and replace worn parts regularly. Refer to “Preventive Maintenance” section of
Owner’s Manual.
• DO NOT operate the treadmill if: (1) the cord is damaged; (2) the treadmill is not working
properly or (3) if the treadmill has been dropped or damaged. Seek service from a qualified
technician.
• DO NOT place the cord near heated surfaces or sharp edges.
• DO NOT use the treadmill outdoors.
• DO NOT operate the treadmill around or where aerosol (spray) or where oxygen products
are being used.
• Read and understand the Owner’s Manual completely before using the treadmill.
• Ensure all users wear proper footwear on or around all Cybex equipment.
• Set up and operate the treadmill on a solid, level surface. Do not operate in recessed areas
or on plush carpet.
• Provide the following clearances: 19.7 inches (0.5 m) at each side, 79 inches (2.0 m) at the
back and enough room for safe access and passage at the front of the treadmill. Be sure
your treadmill is clear of walls, equipment and other hard surfaces.
• DO NOT attempt repairs, electrical or mechanical. Seek qualified repair personnel when
servicing. If you live in the USA, contact Cybex Customer Service at 888-462-9239. If you
live outside the USA, contact Cybex Customer Service at 508-533-4300.
• Use Cybex factory parts when replacing parts on the treadmill.
• DO NOT modify the treadmill in any way.
• DO NOT use attachments unless recommended for the treadmill by Cybex.
• Ensure all User and Facility safety precautions are observed.
Safety
Page 1-3
Cybex 425T Treadmill Service Manual
• Carefully read and understand the following before using the 425T treadmill:
• Warning Decals
• Caution Decals
To replace any worn or damaged decals do one of the following: Visit www.
cybexinternational.com to shop for parts online, fax your order to 508-533-5183 or contact
Cybex Customer Service at 888-462-9239. If you live outside of the USA, call 508-533-4300.
For location or part number of labels, see the parts list and exploded-view diagram. This
information can be found in the Service chapter in this manual or on Cybex web site at www.
cybexinternational.com.
Warning Decals
Warning decals indicate a potentially hazardous situation, which, if not avoided, could result in
death or serious injury. The warning decals used on the Cybex 425T are shown below.
WARNING
1. Obtain a medical exam before beginning any exercise program.
2. Stop exercising if you feel faint, dizzy, or experience pain and consult your physician.
3. Obtain instruction before using. Lisez les instructions avant l'utilisation.
4. Read and understand the Owner’s Manual and all warnings posted on the unit before using.
5. Read and understand emergency stop procedures.
6. DO NOT wear loose or dangling clothing while using the treadmill.
7. Keep all body parts, hair, towels, water bottles and the like free and clear of moving parts.
8. Place your feet on the two top steps when starting or stopping the treadmill.
9. Use the treadmill handrails for support and to maintain balance.
10. Keep children away from the treadmill. Teenagers and disabled persons must be supervised
while using. Tenez les enfants éloignés. Les adolescents et les handicapés doivent être surveilles.
11. DO NOT use the unit if you exceed 350 lbs. (158 kg). This is the rated maximum user weight.
12. Report any malfunctions, damage or repairs to the facility.
13. Replace any warning labels if damaged, worn or illegible.
14. Stop and place the treadmill at 0 degrees incline (level) after each use.
SERIOUS INJURY COULD OCCUR IF
THESE PRECAUTIONS ARE NOT OBSERVED
DE-19189-4
DE-19189-4
Warning
Safety
Page 1-4
DE-19238
Warning
Motor Cover
Cybex 425T Treadmill Service Manual
DE-19238
Safety
Page 1-5
Cybex 425T Treadmill Service Manual
Safety
Page 1-6
DE-16928
Warning
Motor Cover
Cybex 425T Treadmill Service Manual
Caution Decals
Caution decals indicate a potentially hazardous situation, which, if not avoided, may result in
minor or moderate injury. There are no caution decals used on this unit. However, there are
caution statements listed in Chapters 5 and 6 of this manual. See Chapters 5 and 6.
Emergency Stop Key (e-stop)
The e-stop key functions as the emergency stop. In an emergency situation, remove the
e-stop key and the treadmill will come to a stop. Before using the treadmill, clip the e-stop
key as described below.
1. Clip the e-stop key to your clothing. NOTE: Be sure the string is free of knots and has
enough slack for you to run comfortably with the e-stop key in place.
2. Without falling off the treadmill, carefully step backward until the e-stop falls off the
treadmill. NOTE: If the e-stop clip falls off your clothing then the test has failed. Reclip the
e-stop clip to your clothing and repeat this step.
3. Replace e-stop after successfully testing the e-stop key. See the illustration shown below.
4. The treadmill is now ready to be used.
5. After use, remove the e-stop key from the treadmill.
NOTE: The e-stop key shall be removed to help prevent unauthorized use. Refer to the
Stopping the Treadmill section in the Operation chapter for more information about
the e-stop key.
Safety
Page 1-7
Cybex 425T Treadmill Service Manual
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Safety
Page 1-8
Cybex 425T Treadmill Service Manual
2 - Preventive Maintenance
Warnings/Cautions
All warnings and cautions listed in this chapter are as follows:
! WARNING: All maintenance activities shall be performed by qualified personnel.
Failure to do so could result in serious injury.
! WARNING: To prevent electrical shock, be sure that the treadmill is unplugged
from the electrical outlet before performing any cleaning or maintenance
procedures.
! WARNING: Keep wet items away from inside parts of the treadmill. Electrical shock
could occur even if the treadmill is unplugged. Do not touch components
on the lower board. A charge can remain after unplugging the power cord
and turning off the treadmill.
Regular Maintenance Activities
! WARNING: All maintenance activities shall be performed by qualified personnel.
Failure to do so could result in serious injury.
Preventive maintenance activities must be performed to maintain normal operation of your
treadmill. Keeping a log sheet of all maintenance actions will assist you in staying current with
all preventive maintenance activities. See Service Schedule located at the end of this chapter.
NOTE: Worn or damaged components shall be replaced immediately or the treadmill removed
from service until the repair is made.
NOTE: Cybex is not responsible for performing regular inspection and maintenance actions
for your treadmill. Instruct all personnel in equipment inspection and maintenance
actions and also in accident reporting/recording. Contact Cybex Customer Service at
888-462-9239 or 508-533-4300 for any preventive maintenance or service concerns.
Cleaning Your Treadmill
When cleaning your treadmill spray a mild cleaning agent, such as a water and dishsoap
solution, on a clean cloth first and then wipe the treadmill with the damp cloth.
Preventive
Maintenance
Page 2-1
Cybex 425T Treadmill Service Manual
NOTE: Do not spray cleaning solution directly on the treadmill. Direct spraying could cause
damage to the electronics and may void the warranty.
! WARNING: To prevent electrical shock, be sure that the treadmill is unplugged
from the electrical outlet before performing any cleaning or maintenance
procedures.
After Each Use — Wipe up any liquid spills immediately. After each workout, use a cloth to
wipe up any remaining perspiration from the handrails and painted surfaces.
Be careful not to spill or get excessive moisture between the edge of the display panel and
the console, as this might create an electrical hazard or cause failure of the electronics.
As Needed — Vacuum any dust or dirt that might accumulate under or around the treadmill.
Motors are especially susceptible to dust and dirt, and restricted airflow can prevent adequate
cooling that could shorten motor life. Cleaning this area should be done as often as indicated
in the Service Schedule.
! WARNING: Keep wet items away from inside parts of the treadmill. Electrical shock
could occur even if the treadmill is unplugged. Do not touch components
on the lower board. A charge can remain after unplugging the power cord.
To clean the motor components, you must raise the elevation to 15% elevation. Unplug the
treadmill and carefully lift the rear of the treadmill. Lift the treadmill until it rests on the top
of the console. Use a vacuum attachment or hand vacuum to clean the exposed elevation
assembly, drive motor, lower electronics and the surrounding areas. Wipe clean the underside
of the treadmill to prevent dirt and dust build-up.
Also use a dry cloth for the areas that you can’t reach with the vacuum cleaner. If the machine
has not been used for some time or is excessively dirty, use a dry cloth to wipe all exposed
areas.
Carefully lower the rear of the treadmill and roll it back from its present position to vacuum the
floor area underneath the unit. When finished, return the treadmill to its normal position.
Contact Heart Rate Grips — Contaminants, such as hand lotions, oils or body powder, may
come off on the contact heart rate grips. These can reduce sensitivity and interfere with the
heart rate signal. It is recommended that the user have clean hands when using the contact
heart rate. Clean the grips using a cloth dampened with a cleaning solution containing rubbing
alcohol. The grips are the only part of the treadmill you should use a cleaning solution containing
rubbing alcohol.
Preventive
Maintenance
Page 2-2
Cybex 425T Treadmill Service Manual
Running Belt Maintenance
Belt and Deck — Wipe the belt surface and the deck area with a clean dry towel to minimize
the effect of friction between the deck and the running belt. This should be done often to
prevent premature wear of the deck, running belt, and the drive motor system. See the
Service Schedule at the end of this chapter.
The running belt may become loose and slip on the drive roller with each foot plant. If it does,
follow the Tensioning and Centering the Belt procedure below. See the Service Schedule in
this chapter for a minimum schedule for checking the belt tension.
Tension and Center the Belt — If the belt is slipping under each step perform this
procedure:
Tools Required
• 3/4” Socket wrench
1. Tension the belt.
A. Use a 3/4” socket wrench to turn each bolt 1/2 turn clockwise. See Figure 1.
NOTE: Be sure to adjust each bolt equally on each side.
Figure 1
B. Press the Quick Start key.
C. Press the Speed
+ to bring the speed up to 3.5-4 mph (5.6-6.4 kph). Allow the
treadmill to run for a minute.
D. Observe the belt to be sure it stays centered. If it is not centered follow step 2.
E. Walk on the belt to see if it still slips. If it does restart this procedure at step 1 A. If you
have to do this procedure three times and it still slips call Cybex Customer Service.
Follow the next step to be sure the belt is centered.
NOTE: Be careful not to over tighten the belt. Over tightening the belt can cause the belt to
stretch and require replacement.
Preventive
Maintenance
Page 2-3
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