Precor EFX 5.33 User manual

5.33 Elliptical Fitness Crosstrainer
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5.33 Elliptical Fitness Crosstrainer
Warning: This service manual is for use by Precor trained service providers only.
IfyouarenotaPrecorTrainedServicer,youmustnotattempttoserviceanyPrecorProduct;
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.
© 2004 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
20039-126

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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 EFX
5.33, facing the display enclosure. Three versions of 5.33 have been manufactured. Version 1
(serial code CR) and version 2 (serial code ST) are essentially the same except that version two
has the capability of remote software upload. Version 3 (serial code AAAB) incorporates changes
in the product color scheme (stone gray), the eddy current magnet mounting, lower PCA
mounting and speed sensor mounting.
Warning and Caution Statements and General Safety Guidelines
Warning statements indicate a particularly dangerous activity. Warning statements you will find in
this manual include:
• To remove power from the EFX 5.33, the power cord must be disconnected from the wall
outlet. Always ensure that the EFX 5.33 is unplugged from the wall outlet when you inspect
or adjust the EFX 5.33, or when you isolate, remove, or replace a EFX 5.33 component.
• Removing the covers exposes high voltage components and potentially dangerous
machinery. Exercise extreme caution when you perform maintenance procedures with the
hood removed.
• During service operations you will be very close to moving machinery and high voltage
components. When you perform maintenance procedures with the covers removed, remove
jewelry (especially from ears and neck), tie up long hair, remove neck ties, and do not wear
loose clothing.
• Hazardous pinch points exist between the ramp and moving arm linkage.
• Exercise caution when touching any wire or electrical component during EFX 5.33
operation.
Caution statements are intended to prevent damage to the EFX 5.33 as 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 orientation.
Safety guidelines you should know and follow include:
• Read the owner’s manual and follow all operating instructions.
• Visually check the EFX 5.33 before beginning service or maintenance operations. If it is not
completely assembled or is damaged in any way, exercise extreme caution while operating
and checking the EFX 5.33.

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• When operating the EFX 5.33, do not wear loose clothing. Do not wear shoes with heels or
leather soles. Check the soles of your shoes and remove any embedded stones. Tie long
hair back.
• Do not rock the unit. Do not stand or climb on the handlebars, display enclosure, or cover.
• Do not set anything on the handlebars, display enclosure, or cover. Never place liquids on
any part of the EFX 5.33 other than a water bottle in the water bottle holder during normal
operation.
• To prevent electrical shock, keep all electrical components, such as the power cord and
circuit breaker away from water and other liquids.
• Do not use accessory attachments that are not recommended by the manufacturer-such
attachments might cause injuries.
General Information
For the latest exploded view, part number and part pricing information, visit the Precor dealer
website at “www.precor.com/connection.

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Required Tools and Equipment
The following list is a summary of the tools and equipment required when you service Precor’s
EFX 5.33.
TOOLS EQUIPMENT
phillips and flat-head screwdrivers anti-static wrist strap (20024-101)
digital multimeter
standard and metric allen wrench sets
open-end wrench set Supplies
blue loctite
drive ratchet and ratchet set
socket drive allen set cable ties
chip puller Spares
rubber mallet interconnect cables
snap ring pliers
100 ft./lb. torque wrench
300 in./lb. torque wrench
belt gauge (part # 20030-117)

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Procedure 2.1 - Accessing the Diagnostic Program
The EFX 5.33 diagnostic software cycles through the following tests:
• Display Test
• Keyboard Test
• Heart Rate Test
• Brake (eddy current) Test
Procedure
1. Plug the power cord into the wall outlet, then turn on the EFX 5.33 with the on/off switch.
Note:
For the purpose of entering the key sequences to access the various diagnostic programs, the
keypad keys are hypothetically numbered from 1 to 7 from left to right.
2. With the PRECOR EFX 5.33 banner displayed, access the diagnostic program by pressing,
keys RESET,5,1,7,6,5,7,6,1, sequentially.
Diagram 2.1 - 5.33 Display
Key #1
Key #3 Key #5
Key #7

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3. Watch the display as the LED test progresses. The test is programmed to display the
following LED illumination sequence:
a. The test name “DISPLAY” will be displayed for 2 seconds.
b. The left half of the L.E.D. matrix illuminates.
c. The right half of the L.E.D. matrix illuminates.
d. All remaining L.E.D.’s, including the heart rate and annunciator L.E.D.’s illuminate.
4. If you do not observe the LED illumination sequences described in Step 3...
THEN... OTHERWISE...
Replace the upper PCA as described The LED test passed successfully;
in Procedure 7.2. continue with the next step.
5. Press the ENTER key to proceed to the keyboard test.
6. The test name “KEYBOARD” will be displayed for 2 seconds.
7. A graphical representation of all the keys on the keyboard will be displayed. When a key is
pressed the representation of the key will be turned “off”. Check all of the keys on the
keyboard in this manner.
THEN... OTHERWISE...
The keyboard test passed successfully; Troubleshoot the keypad and upper
continue with the next step. PCA as described in Procedure 6.2.
8. Press and hold the ENTER key to proceed to the heart rate test.
9. The test name “HEART RATE” will be displayed for 2 seconds.
10. A chest strap heart rate transmitter or a heart rate test transmitter must be used in
conjunction with this test.
11. If no heart rate signal is being received, the message NO HR RCVR will be displayed.
12. When a heart rate signal is being received, unfiltered (U 123) and filtered (F 123) heart rate
signals will be displayed. All of the Smart Rate L.E.D.’s will turn on and the Smart Rate
L.E.D. associated with the heart rate being received will flash each time a heart beat is
detected.
13. Press the ENTER key to proceed to the brake test.
14. The test name “BRAKE” will be displayed for 2 seconds.

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15. The resistance level will be displayed on the left side of the display and the corresponding
power bits (duty cycle) will be displayed on the right side of the display. Initially, the power
bits level will be zero, pressing the , keys will change the number of power bits being
applied to the eddy current system.
16. Press the ENTER or RESET key to exit the diagnostics program.

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Procedure 2.2 - Accessing the Information Display
Procedure
1. Plug the power cord into the wall outlet, then turn on the EFX 5.33 with the on/off switch.
2. With the PRECOR EFX 5.33 banner displayed, press keys RESET,6,5, sequentially.
The EFX 5.33 Information display cycles through the following displays:
a. Odometer
b. Hour meter
c. Software version
d. Error log
5. The display name “ODOMETER” will be displayed for 2 seconds. Then the odometer value
will be displayed, as total strides accumulated.
6. Press the ENTER key to proceed to the hour meter display.
7. The display name “HOUR METER” will be displayed for 2 seconds. Then the hour meter
value will be displayed, as the total number of hours of use. Fractional parts of an hour are
stored internally, the display will be truncated to the nearest full hour.
8. Press the ENTER key to proceed to the software version display.
9. The display name “SW VERSION” will be displayed for 2 seconds.
10. The upper software version (UPPER X.XX) will be displayed. Pressing either SELECT key
will toggle between the upper and lower software version display.
11. Press the ENTER key to proceed to the error log display
12. The display name “ERROR LOG” will be displayed for 2 seconds.
13. The first error log entry will be displayed (1: ERXX).
14. Pressing the , keys will move you through the log entries. Entry 1 will be the most recent
error log entry, with each succeeding entry being older than the preceding entry.
15. Pressing the SELECT key will toggle the display between the log entry (ERROR), the
odometer reading (STRIDES) when the error occurred and the hour meter (HOURS) when
the error occurred.

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16. Pressing and holding the QUICK START key for 2 seconds will cause the prompt CLEAR?
to be displayed, holding the QUICK START for an additional 2 seconds will clear all existing
entries from the error log. The display will confirm that the error log has been cleared by
displaying OK. The display will revert to the first log entry and show it as a null entry (1: ---).
If the QUICK START key is not held for a minimum of 4 seconds, the error log will not be
cleared.
17. Press the ENTER or RESET key to exit the information display program.

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Procedure 2.3 - Accessing the Set User Parameters Display
Selecting United States standard units causes information to be displayed in miles. Information is
displayed in kilometers if metric units are selected. After you select a measurement standard, the
software accumulates and records workout information in the units of the measurement standard
selected.
Procedure
1. Plug the power cord into the wall outlet, then turn on the EFX 5.33 with the on/off switch.
2. With the PRECOR EFX 5.33 banner displayed, press keys RESET,5,6,7,1, sequentially.
3. The display name “SELECT UNITS” will be displayed for 2 seconds.
4. One of two measurement standards will be displayed, U. S. Standard or Metric.
5. If U. S. Standard is selected, weights will be in pounds and distances will be in miles. If
Metric is selected, weights will be in kilograms and distances in kilometers.
6. If you wish to change the measurement standard...
THEN... OTHERWISE...
Use the or  keys to toggle Continue with the next step.
to an alternate measurement standard;
then continue with the next step.
7. Press the ENTER key to save the currently displayed selection and exit the set user
parameters display or press the RESET key to leave the selection unchanged and exit the
set user parameters display.