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Precor EFX 835 Service Manual

Precor EFX 835
171 pages
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EFX 885, 835, 825
Service Manual 20039-166
Page 1
©2011 Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law
EFX 885, 835, 825
Warning: This service manual is for use by Precor trained service providers only.
If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product; 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.

Table of Contents

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Precor EFX 835 Specifications

General IconGeneral
TypeElliptical Trainer
Resistance Levels20
CrossRamp TechnologyYes
Stride Length20 inches
Max User Weight350 lbs
Console TypeLED

Summary

Section One - Things you Should Know

Safety Guidelines

Highlights dangerous activities and essential safety precautions for service.

Procedure 3.1 - P80- Systems Settings

Procedure 3.4 P80 System Settings

Procedure 3.5 P80 Updating Software

Software Update Procedure

Step-by-step guide for updating the console software using a USB drive.

Procedure 3.6 P80 Systems Tests

Systems Tests Overview

Details tests like Auto Stop, Belt Speed, Incline, AMT Stride, and Brake Tests.

Additional Systems Tests

Lists further system tests including Battery, SPM, RPM, CrossRamp, USB, and Touchscreen.

Display and Heart Rate Tests

Details tests for Touchscreen Calibration, Backlight, RGB, Speaker, Numeric Display, and Heart Rate.

Procedure 3.7 P80- Connectivity

Procedure 3.12 P80 Replacing the Console

Procedure 3.13 P80 Replacing the Heart Rate PCA Board

Troubleshooting 3.20- P80 - Black Screen TV Only

Troubleshooting Black Screen TV Issue

Addresses issues where TV channels display black screen with no audio.

Troubleshooting 3.21- P80 - Black Screen Full Console

Boot Screen Procedure for Full Console Black Screen

Steps for rebooting the console and performing power cycles to resolve black screen issues.

Troubleshooting 3.22- P80 - Poor Quality Video Single Unit Only

Troubleshooting Poor Video Quality (Single Unit)

Addresses poor video quality on a single unit due to cable or signal issues.

Troubleshooting 3.23 - P80 Poor Quality Video All Units

Troubleshooting Poor Video Quality (All Units)

Addresses poor video quality across multiple units due to distribution network issues.

Troubleshooting 3.24 - P80 Poor Quality Video One Channel(s) or Limited Channels

Troubleshooting Limited Channel Reception

Addresses poor reception or no reception for specific channels.

Troubleshooting 3.25 - P80 Green Screen

Troubleshooting Green Screen Display

Addresses the issue where the entire touch screen displays green.

Troubleshooting 3.27 - P80 Touch Screen Unresponsive

Single Secret Handshake Calibration Procedure

Details the procedure to enter screen calibration for touch screen issues.

Troubleshooting 3.28- P80 Touch Screen Slow Response

Troubleshooting Slow Touch Response

Addresses issues where the touch screen responds slowly to input.

Troubleshooting 3.29 - P80 Touch Screen Responds Incorrectly to Touch

Troubleshooting Incorrect Touch Response

Addresses touch screen input not registering at the correct location.

Troubleshooting 3.30 - P80 Poor Audio Quality All Channels, One/Limited Units

Troubleshooting Poor Audio Quality (Single Unit)

Addresses poor audio quality on one or limited units while video is good.

Troubleshooting 3.31 - P80 Poor Audio Quality All Channels, Multiple Units

Troubleshooting Poor Audio Quality (Multiple Units)

Addresses poor audio quality across multiple units while video is good.

Troubleshooting 3.32 - P80 Machine Controls Unresponsive

Troubleshooting Unresponsive Machine Controls

Addresses when machine controls do not respond to input.

Troubleshooting 3.33 - P80 Machine Controls Incorrect Response

Troubleshooting Incorrect Machine Controls Response

Addresses improper response from machine controls (e.g., speed up makes speed down).

Troubleshooting 3.34- P80 Message Out of Service Displayed

Troubleshooting 'Out of Service' Message

Addresses the 'Temporarily Out of Service' message on the console.

Troubleshooting 3.35 - P80 Message Please Reset the Treadmill Displayed

Troubleshooting 'Please Reset Treadmill' Message

Addresses the treadmill message 'Please Reset the Treadmill'.

Troubleshooting 3.36 - P80 Unit reboots of its own volition

Troubleshooting Console Reboots

Addresses console rebooting without user input.

Procedure 6.1 - P20 - Accessing the Diagnostic Software

Procedure 5.5 P30 Replacing Upper PCA

Procedure 5.6 P30 Replacing Metric PCA

Procedure 5.7 P30 Replacing Heart Rate PCA

Procedure 5.9 P30 Flash Programming the Upper PCA

Software Upload Procedure

Details the steps for uploading software to the upper PCA using a PDA or computer.

Troubleshooting 5.11 P30 Troubleshooting the Keypad and the Upper PCA

Keypad and Upper PCA Troubleshooting Guide

Guides on troubleshooting keypad and Upper PCA issues, including stuck keys.

PCA and Metric Board Voltage Testing

Details testing the upper PCA and metric PCA using voltage measurements.

Troubleshooting 6.12 P20 Troubleshooting Handheld Heart Rate

Troubleshooting Hand Held Heart Rate (No Chest Strap)

Troubleshooting steps when hand held heart rate works but chest strap does not.

Troubleshooting Hand Held Heart Rate (No Hand Held)

Troubleshooting steps when chest strap works but hand held does not.

Troubleshooting Heart Rate (No Signal)

Troubleshooting steps when neither hand held nor chest strap signals are received.

Troubleshooting 5.13 Upper Display does not Illuminate

Troubleshooting Upper Display Illumination Issues

Addresses issues where the upper display does not illuminate.

Section Seven - Checking EFX Operation

Section Eight - Inspection and Adjustment Procedures

Procedure 8.2 - Inspecting and Adjusting Belt Tension

Procedure 8.3 - Calibrating the Incline Motor

Incline Motor Calibration Procedure

Guides on calibrating the incline motor and setting A/D values.

Section Nine - EFX Troubleshooting Procedure

Troubleshooting Interconnect Cables

Addresses issues with interconnect cables between upper and lower PCAs.

Troubleshooting 9.2 - Troubleshooting the Generator

Troubleshooting Generator Issues

Addresses generator resistance and voltage issues for proper operation.

Troubleshooting 9.3 - Troubleshooting the Incline System

Troubleshooting Incline System Problems

Addresses issues with incline motor movement, errors, and battery voltage.

Procedure 10.3 Replacing the Lower PCA

Procedure 10.4 Replacing the Upper or Lower Interconnected Cables

Procedure 10.5 Replacing a Crankarm Assembly

Procedure 10.6 Replacing an Incline Motor

Procedure 10.7 Replacing the Input Pulley Belt

Procedure 10.8 Replacing the Generator Pulley Belt

Procedure 10.9 Replacing the Input Pulley Assembly

Procedure 10.10 Replacing the Input Step Up Pulley Assembly

Procedure 10.13 Replacing the Stairarm

Procedure 10.14 Replacing the Ramp Assembly

Procedure 10.17 Replacing a Generator

Procedure 10.18 Replacing a Battery

Section Fourteen - Wiring Diagrams

Block Diagram 14.2 - EFX 835

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