What is the voltage of your PWM signal and do you have the series resistor in circuit for the Opto input?

PWM coming out at 5 volt, I thought but no I'm not sure. I have tried with and without the resistor getting the same results from 220 ohm to 1k. The voltage on the other side of the resitor drops to 1.3V. I will redo my circuit from scratch because I'm starting to think there is a power supply problem on the Arduino side. I'll recheck the voltages. If I don't plug in ground, the arduino gets enough ground through the pwm pin to run. I may have a fault in the wire going down. And lastly, I'm tired, my wife is tired of my mess, I've just commited to throwing it all out. Free treadmill in Steinbach!

Thanks. Sorry. I shouldn't have bothered anybody.

 

Free treadmill in Steinbach!

I'm 70Km north of you!

 

I'm 70Km north of you!

I figured you were in Manitoba. I'm dealing with health issues and need to clean up messes. Disappointing when I thought I was almost there. If you want parts, I can deliver what I can carry up. I will need to disassemble to carry up.

 

SWMBO is on my case to down-size.

 

SWMBO is on my case to down-size.

Ah... Yes... Thanks for all the help you give here. If I wake up tomorrow in a different mind set, maybe I'll start from scratch. Not sure how that helps my down-sizing.

 

Sí, hay una versión de ingeniería inversa, ojalá esté todo correcto.
Máx.
[/CITA]
Hola Max, tengo mi caminadora con un controlador dañado (STR G5551). ¿Existe alguno similar que pueda servir como sustituto?

 

Hi
Use English Text

Mod

 

Hi Max, I have my treadmill with a damaged controller (STR G5551). Is there something similar that can serve as a substitute?

It is a custom programmed IC, you would need to have the program details or at least do some reverse-engineering!

 

Hello, I hope everyone is well
I have an MC2100 E REV 2003 Controlor
Since the IC indicator with symbol U5 on the board is charred and I want to replace it
So I want you to help me to get reference of this IC

 

I don't have one here to get the part no, but it could be the Mosfet driver which is usually a MIC4427 or equ. if R29 & R32 are 100Ω and connected to U5 and the Mosfet gate, it probably is.
Otherwise do a little reverse engineering of where U5 is routed to.

 

Hello, I hope everyone is well
I have an MC2100 E REV 2003 Controlor
Since the IC indicator with symbol U5 on the board is charred and I want to replace it
So I want you to help me to get reference of this ICView attachment 318261

poking around, someone mentioned it was a IR21271 on eevblog

 

poking around, someone mentioned it was a IR21271 on eevblog

Hi friend
Thank you so match

 

I was close ! It appears to do the same job as the MIC4427 on other versions.

 

I was close ! It appears to do the same job as the MIC4427 on other versions.

thank you my friend

 

Can somebody tell me the value of R55 i R64 ? IGBT and U10 was damaged. I find those resistors broken as well

 

Hello, I have a MC2100LS-30 rev. It does not mark an error, the main LED stays on, but when it is given "Start", it flashes a few times and turns off. Can you help me how to activate the main from the pins of the HD2 connector? Magnetic key control and start. Thank you in advance. I have checked all the transistors, optocouplers and mosfet, and replaced some components but I still have the same problem, I am thinking that it may be the micro controller of the main.

 

I have used Picmicro to run/test main boards, see my previous posts, it requires a 50hz PWM signal into pin 4 of HD2.
Also you need to ensure there is enough series resistance into the on-board opto, as the one on board is very low .

 

That is one of the few MC2100 boards that use that IC, it is a STR G5551.
Max.

Would you by any chance know the value of the surface mount resistor R50 that connects pin 2 and 5 of the G5551

 

Would you by any chance know the value of the surface mount resistor R50 that connects pin 2 and 5 of the G5551

Can you post a pic of the area?

 

Can you post a pic of the area?

R50 is the missing surface mount part near C30. (I tried to find a data sheet for G5551 with no success)