Hello from Austria

First sorry about my English ;-)
treadmill Controll Board JD-230E/E
My tredmill stoppes working after differend Intervalls (sometimes 8min,sometimes 15min ,..)Power off wait a Night and same thing happens.
Now i disassembly the treadmill an when i touch the controlleboard (rem Marked component in attached pics)
it starts working.
Solderd it out to dissasemble butt no way to identify this thing.
Can anyone Help?

 

Its a pwm regulator thats potted, to prevent tampering, but what voltage is it supposed to be giving out?

 

I dont know
Found No Schematic about this controller

 

Are there any voltage markings on the pcb, and can you show pictures of the track side?

Have you resoldered it to cure any broken joints?

 

Obtain so freezer in an aerosol can (Arctic Air) this is to enable detection of components that fail when getting hot.
You may pin down which component this way.
Max.

 

Re Solderd but now no funktion to the motor.

 

Unless there is a broken track, the module must be damaged, looks like is a pwm speed contoller,.

 

Found this in Web
Maybe helpfull?
Dont want buy a new Board ;-( its expensive

All measurements of voltages are ok as far as I understand it


But on the gate at the mosfet I always get just only 0V

 

I would be tempted to reverse engineer it up to the module, this may then give a clue as to what is in it and design a replacement.
Max.

 

Looks like its switching the mosfet on to control the motor, there is a current sense pin on it from the Source on the fet, the two presets are for speed and current (amp)limit, two 12v supply pins, and one pin has a 100 ohms resistor going to a connector, whats this for needs measuring!!?

My guess is a pwm circuit and depending what the Unknown input pin does..probably to turn it on/ off.

If it is a pwm controller, you can make one from a 555 timer.

 

Thanks Dodgydave
Can you help me to identify the pins ?
1 = driving the Mosfet
2= ?
3= Speed Limiter /Controll
4= Amp Limiter
5=0-5 V this is the signal from Diplay Computer( Speed switches 0,8-14 km/h)
6= GND
7= 12V
Witch 555 Timer would be right.Can you tell where Find a right schematic ?

 

Pin 2 is current sense for the pwm chip in the *blackbox*. You can omit this to get the motor running.

Use a circuit like this

http://www.555-timer-circuits.com/images/PWM-Controller.gif

Take the power from your board pins 6,7
and put the output from the 555 pin 3, to the *black box pin 1*, keep the mosfet on your motor pcb,

you can buy a ready made pwm on ebay.
http://m.ebay.co.uk/itm/12V-36V-Pul...or-Switch-12V-24V-3A-/141673285697?nav=SEARCH

 

thanks
hmm realy pin 2 ?not pin 1

 

Sorry pin 1 my mistake,,, doh!

 

is this what you mean ?

Pins 2,3,4,5 not in use
Speed controlled per poti over 555 Timer ?
If the i want to use the "Speed switch" at the treadmill Display can I connect pin 5 from paneel to pin 6and 2 from 555 timer ?

 

No, the 555 will need to be controlled with its own preset resistor, otherwise the 555 can be voltage controlled on pin 5, but not with 0-5v but 6-10v,.

I would start by making or buying the pwm pcb, and trying it on the mosfet, to see if it works, then start modifying the voltage control using an op amp.

Or you may use an op amp pwm controller like this...
http://circuitswiring.com/circuit-diagrams/24/uploads/allimg/100710/213ZLO3-1.gif

 

Ok
Later i will test the mosfet + on gate should turn motor on at full speed i think.
if this is working i gona buy the attached controller and try to integrate.
then i will report the summary ;-)
Thanks for time and help

 

Hello MichiKrems,
Did you manage to fix the board? I am having the same problem you had for the last 2 days. My control board model is exactly the same as yours. Power to motor from Mosfet stops working after a minute roughly. Any advise will be really helpful.
Thanks,
Charley

 

Pic of my conrol board...

 

Hello
In my case i changed THe Original Controller .speed is now controlled via extern poti which i Mountet nett the display