CYBEX 750A User manual

Cybex Arc Trainer®750A/750AT
Service Manual
Cardiovascular Systems
Part Number 750A-901 E
www.cybexinternational.com

Cybex Arc Trainer®750A/750AT
Service Manual
Cardiovascular Systems
Part Number 750A-901 E
Cybex®and the Cybex logo are registered trademarks of Cybex International, 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.
© 2010, 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 [phone]
www.cybexinternational.com • [email protected] • 750A-901 E • August 2010

Front Pages
FCC Compliance Information ......... iii
1 Safety
Grounding and Voltage Information .... 1-1
Important Safety Instructions.......... 1-2
Warning and Caution Decals.......... 1-4
CSAFE Ports .................... 1-7
2 Preventive Maintenance
Warnings .......................... 2-1
Cleaning Unit....................... 2-1
Preventive Maintenance Activities...... 2-2
Remove Access Cover............... 2-2
Attach Access Cover ................ 2-2
Drive Belts......................... 2-3
Recommended Service Schedule...... 2-3
Statistics .......................... 2-4
Rechargeable Battery ............... 2-5
Environment ....................... 2-6
3 Customer Service
Contacting Service .................. 3-1
Serial Number...................... 3-1
Ordering Parts...................... 3-2
Servicing of Double-Insulated Products. . 3-2
Damaged Parts...................... 3-3
Return Material Authorization (RMA) ... 3-3
4 Service
Warnings. . . . . . . . .................. 4-1
Cautions . . . . ...................... 4-1
Display Console......................4-2
Audio Visual (AV) Key Pad – Optional. . . 4-2
Service Diagnostics...................4-3
Error Codes.........................4-6
Trouble Shooting/Error Codes. . . . . . . . . 4-7
Parts List. . . . . . . . ..................4-34
Exploded Views......................4-35
Schematic . . . . . . . . . . . . . . . . . . . . . ...4-55
Cybex Arc Trainer 750A/750AT Service Manual
Table of Contents
Page i

Page iii
Cybex Arc Trainer 750A/750AT Service Manual
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. There is no guarantee that interference will not occur in a particular
installation.
If equipment does cause harmful interference to radio or television reception,(determine by
turning the equipment off and on) the user is encouraged to try to correct the interference by
one or more of the following methods:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a different circuit from the receiver.
• Consult dealer or an experienced radio/TV technician.

Safety
Page 1-1
Cybex 750A/750AT Arc Trainer®Service Manual
1 – Safety
IMPORTANT: Read all instructions and warnings before using.
Grounding and Voltage Information
DANGER: Improper connection of equipment grounding conductor can result in a risk of electric
shock. Check with a qualified electrician or service provider if in doubt as to whether the
unit is properly grounded.
For Optional Power Supply
Unit must be grounded. This unit is equipped with an optional equipment-grounding conductor cord
and a grounding plug.
Do not use a ground plug adapter to adapt the power cord to a non-grounded outlet.
Plug must be plugged into an appropriate outlet that is properly installed and grounded in accordance
with all local codes and ordinances.
If unit malfunctions, grounding provides path of least resistance for electric current to reduce risk of
electric shock.
Cybex is not responsible for injuries or damages as a result of cord or plug modification.
Verify voltage requirements of unit match local voltage requirements.
Verify unit outlet is the same configuration as the plug.
Power Adapter
24 VDC Power Cord
NOTE: Use Cybex supplied power adapter and power cords only.
Connector
Varies by
Country

Cybex 750A/750AT Arc Trainer®Service Manual
Safety
Page 1-2
Important Safety Instructions
(Save These Instructions)
DANGER: To reduce the risk of electrical shock, always unplug unit from electrical outlet immediately
after use and before cleaning.
WARNING: Serious injury could occur if these listed precautions are not observed. Follow
precautions to reduce the risk of burns, fires, electric shock or injury.
User Safety Precautions
Obtain medical exam before beginning any exercise program.
WARNING: Heart rate monitoring systems may be inaccurate. Over exercise may result in serious
injury or death. If you feel faint stop exercising immediately.
Stop exercising if feeling faint, dizzy or experiencing pain and consult your physician.
Obtain instruction before using. Lisez les instructions avant l’utilisation.
Read and understand the Owner’s Manual and all warnings posted on the unit before using.
Keep children away. Teenagers and disabled must be supervised. Tenez les enfants éloignés. Les
adolescents et les handicapés doevent être surveilles.
Use the handrails for support and to maintain balance.
Wait until foot plates come to a complete stop before dismounting. Attendre l’arret complet des
reposes pieds avant de descendre.
Keep foot plate surface clean and dry.
DO NOT wear loose or dangling clothing while using.
Keep all body parts and other items free and clear of moving parts.
DO NOT use unit if user weight exceeds 400 lbs (180 kg). This is the rated maximum user
weight.
Report any malfunctions, damage or repairs to the facility.
Replace any warning labels if damaged, worn or illegible.

Safety
Page 1-3
Cybex 750A/750AT Arc Trainer®Service Manual
Facility Safety Precautions
NOTE: It is the sole responsibility of the user/owner or facility operator to ensure that regular maintenance is
performed.
Enforce all user and safety precautions.
Read and understand the Owner’s Manual completely before assembling, servicing or using unit.
Verify all users are properly trained on using the equipment.
Do not use unit outdoors.
Verify that each unit is setup, leveled and operated on a solid, level surface. Do not install equipment
on an uneven surface.
Verify there is enough room for safe access and operation of unit.
Use Cybex AC power adapters only.
Do not use the optional power adapter in damp or wet locations.
Do not use the unit if: (1) the unit is plugged into an optional power adapter that has a damaged cord;
(2) the unit is not working properly or (3) if the unit has been dropped or damaged. Seek service from
a qualified technician.
EQUIPMENT is not suitable for use in the presence of aerosol (spray), FLAMMABLEANAESTHETIC
MIXTURE WITH AIR or WITH OXYGEN or NITROUS OXIDE.
Perform regular maintenance checks on unit. Performance level can be maintained only if examined
regularly. Pay close attention to all areas most susceptible to wear, including (but not limited to)
cables, pulleys, belts and grips.
Replace any warning labels if damaged, worn or illegible.
Immediately replace worn or damaged components. If unable to immediately replace worn or
damaged components, then remove unit from service until repair is made.
Do not attempt repairs; electrical or mechanical. Seek qualified repair technician when servicing.
Failure to do so could result in serious injury. See Chapter 3 – Customer Service for contact
information.
Use only Cybex supplied components to maintain/repair unit.
Keep a repair log of all maintenance activities.
Disconnect the optional power adapter before servicing unit.
Do not use attachments unless recommended for the unit by Cybex.
The unit may generate electromagnetic or other forms of interference, or it may be affected by
interference from other equipment nearby. If this is suspected, take precautions by separating the
equipment or otherwise shielding it to avoid such interference.

Cybex 750A/750AT Arc Trainer®Service Manual
Safety
Page 1-4
Unit with A/V Options
Devices connected to Cybex equipment must comply with appropriate safety standards. This includes
but not limited to: UL 1647 and EN 60335-1.
There must be adequate mechanical mounting of the device in all combinations (configurations).
Device must be stable on the unit in all configurations.
Warning and Caution Decals
NOTE: To replace any worn or damaged labels, see Chapter 3 – Customer Service for contact information.
Warning decals indicate a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
Carefully read and understand the following caution and warning labels before using the unit.
Warning decal part number
750A-372-4 (if applicable)

Safety
Page 1-5
Cybex 750A/750AT Arc Trainer®Service Manual
DE-17219-4 B
CAUTION
Moving parts.
Keep hands away
when in use.
Warning decal part number
DE-17219-4 (Both Sides)
SERIOUS INJURY COULD OCCUR IF THESE PRECAUTIONS ARE NOT OBSERVED
750A-330-4
WARNING
1. Obtain a medical exam before beginning any exercise program.
2. WARNING! Heart rate monitoring systems may be inaccurate.
Over exercise may result in serious injury or death. If you feel
faint stop exercising immediately.
3. Stop exercising if feeling faint, dizzy, or experiencing pain and
consult your physician.
4. Obtain instruction before using. Lisez les instructions avant l'utilisation.
5. Read and understand the Owner's Manual and all warnings
posted on the unit before using.
6. Keep children away. Teenagers and disabled must be supervised.
Tenez les enfants éloignés. Les adolescents et les handicapés
doivent être surveilles.
7. Use the handrails for support and to maintain balance.
8. Wait until foot plates come to a complete stop before dismounting.
Attendre l'arret complet des reposes pieds avant de descendre.
9. Keep foot plate surface clean and dry.
10. DO NOT wear loose or dangling clothing while using.
11. Keep all body parts and other items free and clear of moving parts.
12. DO NOT use unit if user exceeds 400 lbs. (180 kg). This is the rated
maximum user weight.
13. Report any malfunctions, damage or repairs to the facility.
14. Replace any warning labels if damaged, worn or illegible.
Warning decal part
number 750A-330-4

Cybex 750A/750AT Arc Trainer®Service Manual
Safety
Page 1-6
NOTE: This is the minimum recommended service.
NOTE:
If using optional AC Power Kit, unplug unit from wall outlet.
Determine mileage.
1.Start
pedaling unit.
2.During initial countdown, press CLEAR 9,9,9 ENTER.
The firstmenu item is ODOMETER. Press ENTER
to view accumulated distance.
First 500 Miles / 800 Km
ACheck drive belts for tension and wear.
Every 5000 Miles / 8000 Km
ACheck drive belts for tension and wear.
BMove unit and vacuum underneath.
CRemove access cover to clean inside - u
Every 20,000 Miles / 32000 Km
DCheck elevation assembly and replace worn p
Service Schedule
U6
Q1
L3
T1
C25
J2 J1 J5
J4
D2 D36
C23
C24
K1
K2
K3
J8
J6
L5
10
9
3
4
2
17
8
65
LED 1 - Console Transmit
LED 2 - Console Receive
LED 3 - Battery Charge Status
LED 4 - Battery Charge Status
LED 5 - Powered from Generator
LED 6 - Brake Current
LED 7 - +12V External Power
LED 8 - Display Voltage (+12V)
LED 9 - Elevation Motor Down
LED 10 - Elevation Motor Up
Diagnostic LED Designation
All maintenance activities shall be performed by qualified
personnel. Failure to do so could result in serious injury.

NOTE: Refer to Service Manual for detailed trouble shooting information.
Set up (CLEAR 7,5,0, ENTER)
Diagnostic (CLEAR 8,8,8, ENTER)
Statistics (CLEAR 9,9,9, ENTER)
Entering Hidden Menus
A.Clean Brake/Enclosure
B.Check Connections
C.Check Fuse
D.Check Battery
750A-329-4
8Approaching Over-Temperature
9Display watchdog triggered B,H,K
22Speed irregularity - Low speed and High power
23Speed irregularity - High speed and Low power
24Incline moving too slowly D,F,J
25Incline movement feedback stopped
26Incline disabled C,D,E,F,J
27Low Battery B,G,I,K
28Over-Temperature A,B,C,G
29Controller watchdog triggered - EEPROM or Memory Error
Error Codes
BATTERYSTATUS FROM LEDs 4 AND 3
NO
BATTERY PRE
CHARGE HIGH
CHARGE TRICKLE
CHARGE
43434343
Warning decal part number - 750A-329-4
Warning decal part number
DE-17155-4
NOTE: Decal on inside of cover.

Safety
Page 1-7
Cybex 750A/750AT Arc Trainer®Service Manual
J7
J5
J9
J10
J8
CSAFE Port (J9)
Communication
8V DC/100 MA
Power Supply
Back of Console
CSAFE Port
The CSAFE standard defines a communication protocol and low-voltage DC power source specific to the
Fitness Equipment Industry. These RJ-45 phone jacks are provided for use ONLY within the CSAFE protocol.
For more information on CSAFE standard, visit www.fitlinxx.com/csafe.
NOTE: The CSAFE port inside the console, accessible through the back cover, is the only port that carries
BOTH the CSAFE communication lines and the 8.0v DC CSAFE power supply. If attaching a CSAFE
compliant device that requires power, this connection must be used. Power is present only when the
unit is in use or when a power supply is attached.

Cybex 750A/750AT Arc Trainer®Service Manual
Safety
Page 1-8
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Cybex Arc Trainer 750A/750AT Service Manual
Maintenance
Page 2-1
2 - Preventive Maintenance
Warnings
Read all warnings in this chapter and in Chapter 1 — Safety.
Observe the following warnings and cautions:
All maintenance activities shall be performed by qualified personnel. Failure to do so could result in
serious injury.
To prevent electrical shock, verify unit is unplugged from the electrical outlet before
performing any cleaning or maintenance procedures. NOTE: A charge can remain after
unplugging the power cord.
Keep wet items away from inside parts of unit.
Performance level of equipment can be maintained only if it is examined regularly for damage and wear.
NOTE: Pay special attention to components most susceptible to wear.
Replace worn or damaged components immediately and/or keep the equipment out of use until repair is
completed.
Cleaning Unit
1. Spray a clean cloth with a mild cleaning agent, such as a water and dish soap solution.
2. Wipe unit.
NOTE: Do not spray cleaning solution directly on unit. Direct spraying could cause damage to electronics and
may void warranty.
After Each Use:
Wipe up any liquid spills immediately.
Wipe up any remaining perspiration from handles and painted surfaces.
Be careful not to spill or get excessive moisture on the console and display overlays, as this might create
an electrical hazard or cause failure of the electronics.
Clean heart rate grips using a cloth dampened with a cleaning solution containing alcohol.
NOTE: The heart rate grips are the only part of the unit where a cleaning solution containing alcohol should be
used.

Cybex Arc Trainer 750A/750AT Service Manual
Maintenance
Page 2-2
1. Read and understand warnings listed in this chapter and in Chapter 1 – Safety. Read and understand all
instructions in this section.
2. During maintenance, disconnect the external power source. If unit has the optional AC Power Kit, unplug the
power cord from the power outlet.
For some maintenance activities it will be necessary to remove and replace the access cover.
Tool Required
Phillips screwdriver•
Preventive Maintenance Activities
Perform regular preventive maintenance to ensure normal operation of unit. Keep a log of all maintenance actions
to assist in staying current with all preventive maintenance activities.
NOTE: Cybex is not responsible for performing regular inspection and maintenance actions of this unit. Instruct
all personnel in equipment, inspection and maintenance. Require all personnel to report and record all
accidents.
Remove Access Cover
1. Using a Phillips screwdriver, remove the two
lower screws securing the access cover.
See Figure 1.
2. Using a Phillips screwdriver, remove two
upper screws securing the access cover.
See Figure. 1
3. Remove the access cover.
WARNING: The flywheel may be hot. Wait
until it cools before servicing.
Attach Access Cover
NOTE: Do not over tighten screws.
1. Using a Phillips screwdriver, replace and
tighten the two upper screws removed in
step 2 Remove Access Cover.
2. Using a Phillips screwdriver, replace and
tighten the two lower screws removed in
step 1 Remove Access Cover.
3. Test unit for proper operation.
Figure 1
Lower Screws (2)
Access
Cover
Upper Screws (2)

Cybex Arc Trainer 750A/750AT Service Manual
Maintenance
Page 2-3
Drive Belts
There are two drive belts that may become loose,
worn or cracked.
Unless the belts have been removed and not replaced
properly, it is unlikely the belts will come loose or
need to be retensioned. See Figure 2.
NOTE: If a belt has cracks or appears worn, it must
be replaced immediately by a qualified service
technician.
Primary Belt – The wider of the two belts. It has
grooves that keep it aligned on the large upper pulley.
Secondary Belt – The narrower of the two belts. It
has gooves that keep it aligned on the flywheel’s drive
pulley.
Figure 2
Primary
Drive Belt Secondary
Drive Belt
Recommended Service Schedule
To determine mileage start striding:
During initial countdown, press CLEAR, key in 9-9-9 and press ENTER. The first menu item is
ODOMETER.
Press ENTER to view accumulated distance.
First 500 Miles (800 KM)
Follow this procedure to ensure the belts are tensioned properly and in good condition.
1. Remove access cover. (See previous procedure Remove Access Cover)
2. Pull down and roll each belt to examine the condition. If a belt has cracks or appears worn, it must be
replaced immediately by a qualified service technician.
3. Attach access cover. (See previous procedure Attach Access Cover)

Cybex Arc Trainer 750A/750AT Service Manual
Maintenance
Page 2-4
Every 5000 Miles (8000 KM)
Check drive belts for tension and wear. (See procedure First 500 Miles)
Move unit and vacuum underneath. Lift the rear of unit and roll it back from its present
position. Vacuum underneath and return unit to normal position.
Clean inside unit.
1. Remove access cover. (See previous procedure Remove Access Cover)
2. Using a vacuum cleaner attachment or hand vacuum, clean the exposed components.
3. Remove dirt and debris from internal components.
4. Using a dry cloth, wipe all exposed areas.
5. Attach access cover. (See procedure Attach Access Cover)
Every 20,000 Miles (32000 KM)
Contact qualified service technician to check elevation assembly, replace any worn parts and lubricate
elevation bushings.
Statistics
The Statistics screen allows tracking of equipment usage.
Open Statistics screen from Count Down, Lock, CSAFE ID Entry or Dormant Modes
Press Clear, key in 9-9-9 and press ENTER.
Data features can also be accessed from the CSAFE port.
Use the ENTER key to advance to next screen.
Use the Load Control keys to scroll forward or backward in the menu.
Statistics Menu Display
ST1 – ODOMETER KM XXXX.X or
MI XXXX.X 0.0 – 999,999.9 (X=total accumulated miles or KM)
ST2 – HOURS HOURS XXXXXX 0 – 99999 (X=total user session time)
ST3 – STARTS STARTS XXXXXX 0 – 999,999 (X=total number of user sessions)
ST4 – MOVES MOVES XXXXXX 0 – 9,999,999 (X=number of incline moves in 1% increments)
ST5 – BATTERY BATTERY XXXXXX 0 – 999,999 (X=total whole minutes the battery has been used)
ST6 – ERRORS X ERR X HH:MM
M-DD-YY Tracks error codes in a rolling log of 20 entries, each stamped with time and date
ST7 – PROGRAM
USAGE PR Y XXXXXX Y= program number XXXXX=number of times program was chosen, set completed
and unit entered active mode.
Clear data by holding Pause/End key for three seconds, listen for double beep, and press CLEAR.