Precor 9.31 User manual

9.31, 9.33, 9.35 Treadmill
Page 1
9.31, 9.33, 9.35 Treadmill
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.
© 2007 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
20081-116

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Section One - Things you Should Know
About This Appendix
Section One, Things You Should Know. This section includes technical specifications. Read
this section, as well as the 9.33 or 9.35 Treadmill Owner’s Manual, before you perform the
maintenance procedures in this manual.
Section Two, Software Features. Precor treadmills are programmed with several diagnostic
and setup features. This section contains the procedures you need to access the diagnostic
features on this treadmill.
Section Three, Checking Treadmill Operation. This section provides you with a quick way of
checking treadmill operation. Check treadmill operation at the end of a maintenance procedure
and when it is necessary to ensure that the treadmill is operating properly.
Section Four, Inspection and Adjustment Procedures. Perform inspection procedures when
a trouble symptom points to a particular problem and after removing and replacing major
components. Many maintenance problems can be fixed by adjusting various treadmill
components. This section also provides you with the step-by-step procedures required to make
these adjustments.
Section Five, Troubleshooting Procedures. The diagnostic and troubleshooting procedures
contained in this section should be performed when it is necessary to isolate a problem to a
particular component.
Section Six, Replacement Procedures. When a treadmill component must be replaced, go to
this section and follow the step-by-step procedures required to remove and replace the
component.
Section Seven, Technical Diagrams and Parts Lists. This section includes wiring diagrams,
and block diagrams for the 9.33 and 9.35 Treadmill.
General Information
For the latest exploded view diagram, part number and part pricing information, visit the Precor
dealer website at “www.precor.com/connection”.

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Procedure 2.1 - Accessing the Hardware Validation Program
The treadmill's diagnostic program consists of the following modes:
• Display Test
• Keyboard Test
• Heart Rate Test
• Machine Test
Procedure
1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.
2. Refer to diagram 2.1 below and press keys RESET,5,1,7,6,5,7,6,1, sequentially. Use the
numeric keypad to enter the number sequence. The ARROW keys will step you through the
test modes listed above, allowing you to skip tests or perform only specific tests.
3. DISPLAY TEST.
4. Press the OK key to enter the display test. Press the OK or ENTER key several times to
step through all of the LED’s on the display. Ensure that all of the LED’s illuminate. Press
and hold the OK or ENTER key to exit the display test.
Diagram 2.1 - 9.33 Display
Numeric
Keypad
OK key
Arrow Keys
RESET key

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5. KEYBOARD TEST.
6. The keyboard test will place a dot on the display for each key on the display, including the
numeric keypad. Pressing a key will cause the dot associated with the key to go out. Test all
of the keys in this manner. Tug on the safety key lanyard, to ensure that the STOP key is
activated.
7. Press and hold the OK or ENTER key to exit the keyboard test.
8. HEART RATE TEST.
9. The heart rate test will display the heart rate being received during this test from the hand
held grips, chest strap transmitter or test transmitter.
10. The display will toggle between unfiltered and filtered heart rate readings. They will be
prefixed “U” for unfiltered, “F” for filtered. When a heart rate signal is being accepted the
“heart” will blink and the heart rate will be displayed in the heart rate window and the main
window. Test the heart rate in both the hand held and wireless (chest strap or test
transmitter) modes.
11. Press the OK or ENTER key to exit the heart rate test.
12. MACHINE TEST.
13. There are two test modes in the MACHINE TEST, they are BELT SPEED and INCLINE.
Use the ARROW keys to select the desired test.
14. BELT SPEED
15. Press the OK or ENTER key. POWERBITS will be momentarily displayed then the powerbit
number will be displayed. The power bit level can be checked by starting the running belt.
16. Press the OK key to exit the belt speed test.
17. INCLINE
18. Press the OK or ENTER key. A/D will be momentarily displayed then the analog to digital lift
position number will be displayed. The analog to digital lift position number represents the
incline’s physical position. The A/D number is used to calibrate the incline. The incline must
be calibrated when a new lift motor is installed.
19. Press the RESET to exit the MACHINE TEST.

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Procedure 2.2 - Accessing the Information Display Program
The information display will access the following data;
• Odometer
• Hour Meter
• U Boot SW
• U Base SW
• Lower SW
• Metrics Board SW
• Usage log
• Error log
Procedure
1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.
2. Refer to diagram 2.1 above and press keys RESET,6,5 sequentially. Use the numeric
keypad to enter the number sequence. The ARROW keys will step you through the display
modes listed above, allowing you to skip displays or view only specific displays.
3. The display will momentarily read, DIAGS - INFORMATION DISPLAY.
4. ODOMETER
5. Press the OK or ENTER key. The treadmill’s odometer will be displayed as 1234567 MILES
or 1234567 KM.
Note: The odometer data is stored in non-volatile memory on the upper PCA. If the upper PCA
is replaced the odometer data will be lost.
6. Press the OK or ENTER key to exit the odometer display.
7. HOUR METER.
8. Press the OK or ENTER key. The operating time of the unit will be displayed as 12345
HOURS. The operating time is defined as total amount of time that the unit has operated in
program modes with the drive motor running. The hour meter is also used to provide the
“time stamp” for the error code log.
9. Press the OK or ENTER key to exit the hour meter display.
10. U BOOT SW
11. Press the OK or ENTER key. The U Boot SW part number will be displayed. The U Boot SW
is the software internally used to upload upper PCA operating system software (U Base
SW).

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12. Press the OK or ENTER key to exit the U Boot SW display
13. U BASE SW
14. Press the OK or ENTER key. The U Base SW part number will be displayed. The U Base
SW is the upper PCA operating system software.
15. Press the OK or ENTER key to exit the U Base SW display.
16. LOWER SW
17. Press the OK or ENTER key. The Lower SW part number will be displayed. The Lower SW
is the lower PCA operating system software.
18. Press the OK or ENTER key to exit the Lower SW display.
19. METRICS BOARD SW
20. Press the OK or ENTER key. The metrics board software part number will be displayed.
21. Press the OK or ENTER key to exit the metrics board SW display.
22. USAGE LOG
23. Press the OK or ENTER key. The usage for each program can be displayed. The ARROW
keys will allow to scroll through the list of programs. For example the manual program usage
will be displayed as MANUAL USED X TIMES TOTAL X MINUTES.
24. Press the OK or ENTER key to exit the usage log display.
25. ERROR LOG
26. Press the OK or ENTER key.
27. The error log will store up to 10 error conditions. The errors are logged with the most recent
error in position one. When a new error condition occurs, each existing error is pushed down
one position in log. If there was an error in position 10 when a new error was logged, the
error that was in position 10 will be lost.
28. Each error in the log will show the odometer reading (in miles) and the time (hour meter) and
motorcurrentreadingwhentheerroroccurred.Theerrorsaredisplayedas;
1 ER20 XXXXX MI XXX HRS. XX.X AMPS
29. The ARROW keys will allow you to scroll through the log.
30. When the QUICK START key is held for 2 seconds the message HOLD TO CLEAR
ERRORS will be displayed. If the QUICK START key is held for an additional 2 seconds, the
log will be cleared. The message NO ERRORS will be displayed and all error are erased
from the log.

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31. Press the RESET key to exit the information display.
32. Note: the error log can also be entered at any time by pressing and holding the RESET key
for four seconds.

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Procedure 2.3 - Accessing the User Parameter Program
This procedure allows you to change the following settings:
• Select Units (9.31, 9.33)
• Set Max Pause Time
• Set Cool Down Time
• Set Speed Limit
Procedure
1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.
2. Refer to diagram 2.1 above and press keys RESET,5,6,7,1 sequentially. Use the numeric
keypad to enter the number sequence. The ARROW keys will step you through the display
modes listed above, allowing you to skip displays or view only specific displays.
3. The display will momentarily display DIAGS - SET PARAMETERS
4. SELECT UNITS (9.31, 9.33)
5. The currently selected measurement unit will then be displayed.
6. Use the ARROW keys to toggle between U.S. and METRIC.
7. Press the ENTER key to select the currently displayed measurement unit.
Note: To change the measurements units on a 9.35, Press the METRICS key, select the
measurement unit with the ARROW keys and save the selection with the OK key.
8. SET MAX PAUSE TIME
9. Press the OK or ENTER key.
10. Use the ARROW keys to set the maximum pause time between 1 and 10 minutes.
11. Press the ENTER key to select the currently displayed pause time.
12. SET COOL DOWN TIME
13. Press the OK or ENTER key.
14. Use the ARROW keys to set the COOL DOWN time between 1 and 5 minutes.
15. Press the ENTER key to select the currently cool down time.

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16. SET SPEED LIMIT
17. Press the OK or ENTER key.
18. Use the ARROW keys to set the maximum speed between 1 and 12 MPH.
19. Press the ENTER key to select the currently displayed speed limit.
20. Press the RESET key to exit the set club parameters display.

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Procedure 2.4 - Documenting Software Problems
When a problem is found with the software in the upper or lower PCA, record the information
listed below.
When a problem occurs, record the following information:
• Model and serial number
• Software version number
• Program number running when the problem occurred
• A description of:
a. What happened or failed to happen.
b. The action taken by the user just before the problem occurred.
c. Problem-related information (such as how far into the program the problem occurred,
the work level being used when the problem occurred, etc.).
• The frequency of occurrence.