Life Fitness SC95 User manual

Independent Stairclimbers
®
SC95, SC91, SC85, S9I,
95Si, 93Si, 90S, and 95Se
Customer Support Services
SERVICE MANUAL

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
GENERAL CONTENTS
INTRODUCTION...............................................................................................................ii
SPECIAL SERVICE TOOLS.............................................................................................iii
GLOSSARY ......................................................................................................................iv
SECTIONAL CONTENTS
TROUBLESHOOTING 1
DIAGNOSTICS LED 2A
DIAGNOSTICS LCD 2B
HOW TO…SERVICE 3
ELECTRONICS 4
MISCELLANEOUS 5

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
INTRODUCTION
This service manual is applicable to Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and
95Se. Information represents typical configuration and may differ slightly from actual equipment. The service
manual provides recommendations for safe and efficient approaches.
If an operating problem should arise, turn to the TROUBLESHOOTING GUIDES and attempt to isolate what is
causing the malfunction. The GUIDES are listed by symptoms and follow with suggestions as to the most probable
cause of the problem.
Once you have pinpointed the source of the problem, turn to the appropriate "how to..." Section and review
the proper procedures for removing, replacing or adjusting a part. The "how to..." Sections are organized
by replaceable part (or assembly) name and each page lists the “special tools required“ to complete the
specific task.
If you do not have a part in stock, a form to order by FAX has been included in Section V for your convenience or
you can call Life Fitness Customer Support Services any Monday through Friday from 8:00 AM to 6:00 PM (CST).
When you place a call, in order to speed our response to your particular situation, please have the following
information available for the customer service phone technician who will be prepared to assist you:
1. The Lifecycle equipment model number
2. The serial number
3. The symptom of the problem
4. The part name and number to order
When you receive your order, review the appropriate "How To..." section and follow the step by step procedures
designed to help you install the part quickly and correctly.
If you have any questions or comments please phone, mail, or fax us at:
LIFE FITNESS COMPANY - CUSTOMER SUPPORT SERVICES
10601 Belmont Avenue, Franklin Park, IL 60131; U.S.A.
Telephone: [phone], Toll Free: 800-351-3737, FAX: [phone]

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
SPECIAL SERVICE TOOL REQUIRED
Unless otherwise specified, only basic hand tools are required to perform service procedures
outlined in this section. Some of these standard tools should consist of: Philips and Straight-
Blade Screw Drivers, Torx Set, Pliers, Rubber Mallet, Pry Bar, Snap Ring Pliers (internal and
external), Standard and Metric size Socket Set (3/8 or 1/2 drive), and Standard and Metric size
Combination, open-end, or Box Wrenches.
Specialized tools will be listed after the sub-heading Special Service Tools:, which appears
below the Service Procedure Heading at the top of the page. If no specialized tools are
required, then the title would read: Special Service Tools: NONE, which means that standard
hand tools should be employed to provide service to the product.
Specialized tools must be used to safely and effectively complete the service procedures.
Improvisation or attempts to use any other tool could result in unnecessary damage to
the equipment or personal injury.

iv
Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
GLOSSARY

Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
SECTION I
TROUBLESHOOTING
GUIDES
Page
Grinding Noise ....................................................................................................................3
Slipping and Squealing .......................................................................................................3
Burning Smell......................................................................................................................3
Pedals Resting on Floor......................................................................................................3
Slow Pedal Return...............................................................................................................3
No Power.............................................................................................................................4
Battery Drain .......................................................................................................................4
Display Console Doesn’t Illuminate.....................................................................................4
Display Console Dim...........................................................................................................5
Display Console Illuminates, then goes dark ......................................................................6
Heart Rate Inoperative........................................................................................................6
Life Pulse Sensors Loose ...................................................................................................6
Erratic Heart Rate Display...................................................................................................6
Telemetry Inoperative..........................................................................................................7
Unit Pauses Unexpectedly..................................................................................................7
Display Step Activity Inaccurate..........................................................................................7
Load Resistance Varies ......................................................................................................7
Unable to Change Audio.....................................................................................................8
No Audio to Headphone......................................................................................................8
Unable to Receive any Stations when using Cable.............................................................8
TV Picture Snowy................................................................................................................8
LCD Screen Illuminates but is blank ...................................................................................8
LCD Screen is dark.............................................................................................................8
Screen Doesn’t Respond ....................................................................................................8
Erratic Touch Screen Operation..........................................................................................8
Testing the Inverter Board...................................................................................................9
Testing the Power Supply Cable.........................................................................................10

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95SI, 93SI, 90S, and 95SE
TROUBLESHOOTING GUIDE
NOTES

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
TROUBLESHOOTING GUIDE
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Clutch roller bearings worn excessively If necessary, replace clutch assembly.
Crossover pulley bearings worn
excessively Inspect crossover pulley bearings for excessive wear or binding. If
necessary, replace crossover pulley.
Alternator bearings worn excessively Remove alternator and drive belts.
Spin alternator flywheel and listen/feel
for roughness. If necessary, replace
alternator.
Main drive shaft bearings worn
excessively Remove alternator and drive belts. Inspect main drive shaft bearings for
excessive wear. If necessary, replace
bearings.
Grinding noise during
operation
Pedal roller bearings worn excessively Inspect all roller bearings for excessive
wear or binding. If necessary, replace
rollers.
Main drive belt loose or worn
excessively Adjust or replace belt.
Alternator belt loose or worn
excessively Adjust or replace belt.
Belt spring assembly worn excessively If necessary, replace belt spring.
Slipping or squealing noise
Clutch roller bearings worn excessively If necessary, replace clutch assembly.
Alternator belt tension too low Adjust alternator belt tension.
Burning odor when
functioning New machine A new Stairclimbermay emit a slight
odor during the first few hours of
operation as the load resistor heats up
for the first few times. If odor persists,
contact customer service.
Pedals resting on floor Belt spring assembly broken If necessary, replace belt spring
assembly.
Pedal roller bearings worn excessively If necessary, replace rollers.
Belt/spring assembly binding If necessary, replace pulley.
Clutches binding Check clutch operation to make sure
there is no binding in the free-spinning
direction. If necessary, replace clutch.
Slow pedal return
Back side idler gap too tight Check for minimum gap of 1/16”
between the back side idler and belt. If
necessary, replace bent or damaged
components as needed.

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Independent Stairclimbers SC95, SC91, SC85, S9i, 95Si, 93Si, 90S, and 95Se
TROUBLESHOOTING GUIDE
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Unit will not allow lighter
weight user to reach higher
level
Main drive belt tension excessive Adjust main drive belt tension.
Faulty battery (SC95, SC91 and SC85) Verify battery pack voltage is minimum
of 6VDC. If necessary, replace battery
pack.
Faulty AC Adapter (SC91 and 93Si
only) Verify AC adapter supplies 9VDC(+/- 0.3V). If necessary, replace AC
adapter.
Faulty reed switch Position magnet away from reed
switch. Verify continuity between pin
#2 and #3. Verify an open connection
between pin #1 and #3. Reposition
magnet close to reed switch. Verify an
open circuit between pin #2 and #3,
and continuity between pin #1 and #3.
If necessary, replace reed switch.
Faulty battery charger (SC95, 95Si,
SC91. 93Si, SC85, and 90S) Output voltage of charger should be 6VDC(+/-0.3V). If necessary, replace
charger.
No power
Reed switch improperly positioned Verify reed switch is in correct position.
Stepping rate extremely slow Increase step rate. Use optional
charger.
Stairclimberis consistently used by
lighter (less than 120 lbs.) Users and
workout duration’s are consistently
less than 20 minutes, or usage is less
than 2 hours per day
Charge unit overnight at least once per
week to ensure a long life for the
battery.
Not enough downward force on pedals Eliminate resting majority of body
weight on handlebars.
Battery runs down
Faulty battery pack Charge battery overnight. Verify that
battery voltage is 6VDC (+/-0.3V). If
necessary, replace battery pack.
Faulty reed switch Position magnet away from reed
switch. Verify continuity between pin
#2 and #3. Verify an open connection
between pin #1 and #3. Reposition
magnet close to reed switch. Verify an
open circuit between pin #2 and #3,
and continuity between pin #1 and #3.
If necessary, replace reed switch.
Display console doesn’t
illuminate
Reed switch improperly positioned Verify reed switch is properly
positioned in relation to magnet.