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
https://fitnessgraveyard.com/collections/livestrong-treadmill-parts
| Part | Description | URL | Compatible Models |
|---|---|---|---|
| 1000111476 | Johnson Fitness 1000111476 Motor Control Board AFG HORIZON | Horizon CT7.1 |
Problem
- Short when powered on. Trips breaker.
- Problem resides on the motor control board. MLH0910PC Johnson.
Motor Control Board
Pictures
LED Blink Codes
| LED STATUS | Description |
|---|---|
| LED OFF | An unlit LED indicates that the controller board is not receiving power. Please check that the machine is plugged into a power outlet and that the reset switch is in the "on" position. If the machine should be getting power but isn't, try turning it off and then back on. You may also try plugging another device into the outlet to make certain that the outlet has power. |
| LED ON Solid | A solid lit LED indicates that the controller board has power. If the belt has been started but it does not move, please check to make sure that the upright wire harness is connected, and not damaged. |
| Steady Blink | A steady blink indicates that the controller board is receiving a speed signal from the console. If your walking belt is not moving, check the wiring from the controller board to the drive motor. |
| 1 Blink | If the blink pattern is one blink followed by a pause before another blink, then the controller board has gone into fold-back mode. The motor may be seized, the walking belt may be worn, or the walking belt may need more lubrication. To check for a seized motor, turn the walking belt by hand. If you are unable to turn it, your drive motor has most likely seized. |
| ** 2 Blinks | If the blink pattern is two blinks followed by a pause and another set of two blinks, then a wire has become disconnected from the controller board. Make sure that the wiring to the control board is connected securely. |
| 3 Blinks | If the blink pattern is three blinks followed by a pause and another set of three blinks, then the drive motor current has exceeded 34 amps. Turn the treadmill off and back on. If the problem persists, you will need to replace the controller board. |
| 4 Blinks | If the blink pattern is four blinks followed by a pause and another set of four blinks, then the controller has detected a bad switch. Turn the machine off and back on. If the problem persists, the controller will need to be replaced. |
| 5 Blinks | If the blink pattern is five blinks followed by a pause and another set of five blinks, then the controller cannot resolve the desired speed. Turn the treadmill off and then on. If the problem persists, the controller will need to be replaced. |
| SOS Blink | If the blink pattern is the Morse Code "SOS," then the controller board needs to be replaced. |
Board Layout
Schematic
Chips
Repair
We identified that the MOSFET, power diode and the large capacitors needed replacement on our motor control board.
Replacement Parts
| Part | Specification | Original Part# | Replacement Part# | Image |
|---|---|---|---|---|
| MOSFET | Power Mosfet | IRFP260N | IRFP260N |
|
| 2x Capacitors | Aluminum Electrolytic Capacitors - Snap In 680uF 200 Volts 20% | LSG681M2D-2540 | LGR2D681MELA40 |
|
| Power Diode | Forward Current: 30A, Reverse Voltage: 600V Ultra Fast Diode Fully isolated package | F30U60ST | (IDEAL) |
|
RURP3060 with TO-220 insulation Kit (Another Option) |
|
Completed Work
PICS
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.
Useful Information
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
| Positive Lead | Negative Lead | Expectation |
|---|---|---|
| Drain | Source | Open Circuit |
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 Circuit for another Treadmill
Another:
References
| Reference | URL |
|---|---|
| User Manual | |
Sercice Manual | |
| FoulkesBrau #24 - Lets find the fault on this Trojan treadmill control board DCMD57P PT 1 | https://www.youtube.com/watch?v=gPR6Np6AoN4&t=1s |
| FoulkesBrau #41 - Lets find the fault on this Trojan treadmill control board DCMD57P PT 2 | https://www.youtube.com/watch?v=OrgnpCaxX2s |
| FoulkesBrau #42 - Lets finally repair the fault on this Trojan treadmill control board DCMD57P PT 3 | https://www.youtube.com/watch?v=ErWV33JC440 |
| 271 How to Repair Circuit for TreadMill - Circuit Explained /Troubleshooting | https://www.youtube.com/watch?v=maw1yFxSSjA&t=0s |
| Heatsinking considerations for Common Cathode Rectifying Diode | https://electronics.stackexchange.com/questions/447336/heatsinking-considerations-for-common-cathode-rectifying-diode |
| Electrical Engineering Stack Exchange | https://electronics.stackexchange.com/ |