Overview

Get the results you want whether you're in training or trying to shed a few pounds with the Livestrong LS8.0T folding treadmill. The LS8.0T is equipped with a 2.5-horsepower continuous-duty motor, powerful enough to deliver speeds of 0.5 to 12 miles per hour and an incline range of 0 to 12 percent (in 0.5-percent increments). As a result, you don't have to compromise when working out--a must when training hard. The treadmill is also extremely comfortable thanks to the MaxComfort cushioning system. The system's adjustable cushioning technology allows you to customize your workout with a softer or firmer feel. With more support for each part of your stride, you'll recover quicker between workouts.

Specifications

• Frame type: Folding
• Drive motor: 2.5 continuous-duty horsepower
• Speed range: 0.5 to 12 mph
• Incline range: 0 to 12 percent (in 0.5 percent increments)
• Running area: 20 by 55 inches
• Cushioning: MaxComfort cushioning system
• Display: Backlit LCD and 2 LED feedback windows
• Programs: 9
• Workouts: Manual, Weight Loss 1 and 2, Power Walk 1 and 2, Walk/Run 1 and 2, Incline, and Livestrong.com
• Workout tracking: Livetrack Interactive technology
• Quick speed keys: Yes
• Quick incline keys: Yes
• Heart rate: Contact grips
• Built-in speakers: Yes
• Personal fan: Yes, blower
• Capacity: 325 pounds
• Folded dimensions: 36 by 63 by 44 inches (W x H x D)
• Unfolded dimensions: 36 by 60 by 70 inches (W x H x D)
• Weight: 187 pounds
• Warranties: Lifetime on frame and motor, 2 years on parts, 1 year on labor

  About Livestrong Fitness
  Manufactured by Johnson Health Tech, Livestrong Fitness equipment is a proud partner of the Lance Armstrong Foundation. Livestrong offers a complete line of home fitness equipment, including treadmills, elliptical trainers, and exercise bikes, as well as Livestrong by Matrix commercial fitness equipment. With Livestrong Fitness, you can find the perfect fitness solution for any budget, goal, or lifestyle.

Pictures

Wiring Diagram

Parts

Suppliers

https://parts.johnsonfitness.com/htm0791-01-ls8-0t-tm641-tm652-canadian-2011

https://fitnessgraveyard.com/collections/livestrong-treadmill-parts

Problem

• Short when powered on. Trips breaker.
• Problem resides on the motor control board. MLH0910PC Johnson.

Motor Control Board

Pictures

LED Blink Codes

Blink Codes for Lower Motor Control Board 1000111476

Workflows

Board Layout

Console Cable Pinout

Schematic

Here is a partial schematic created by tracing the board. It is far from complete but could be helpful in the future.

Chips

Repair

We identified that the MOSFET (Q3), diode (D5) and the large capacitors (C3, C4) needed replacement on our motor control board. We also had to replace a resistor (R11) which was mark as being 33 ohms but tested at 10K on the board. 

Had issues with some FAKE mosfets that I bought off Ebay (10 for $8).With the fake mosfets, the mosfets would fail somewhere between 10 and 15 Amps. The motor is rated for 20 amps.

Bought some Infineon mosfets (see below for link) and they worked wonderfully. 

Finish Product:

Replacement Parts

Securing Screws

The board originally had an acetone based lacquer application done to the screws to vibration proof the screws.

Could use nail polish or a thread locker (loctite) as an alternative.

I used some nail polish to secure the screws.

Testing a MOSFET

A simple test to determine if the MOSFET has failed is to check for open circuit between Drain and Source.

Set multi-Meter to Diode Mode

Testing the Treadmill Motor

https://www.youtube.com/watch?v=Ckn5pOMPHHY

• Disconnect the motor connections from the control board.
• Add paperclips to the connectors to facilitate connecting.
• Connect the paperclips to the battery. (Red to +, black to -) Use fully charge 9V battery or larger (drill battery).
• Motor should start to go.

Reverse Engineered Circuits for other Treadmills

Another:

References

Repair References