Your enquiry:- The machine +led indicator increases speed on its own will ,quite rapidly, making it unuseable, i have changed the data cable,checked the motor for sparking in the dark (brushes), checked all visible connectors,When jogging you can see the speed + jogger flashing on to increase the speed , it then gets to a fairly high pace & then achieves flat out speed in no time. While i know the machine is quite aged if possible i would like it repaired, of course i do not know if the spares or pc boards are still available for this machine.
In addition to what you have already checked, It could be that you have a sticking membrane keypad (check to see if the indicated speed also increases on the display), an erratic speed sensor (clean it out) or the motor controller could be breaking down (extreme but possible). I’d recommend a diagnosis visit as this will at least ensure the machine is thoroughly diagnosed before you make any decisions. For info parts are still available but they are becoming rare and there’s no sale or return option on self diagnosed spares.
Please let me know how you wish to proceed. If you wish to book yourself in for a visit, we have an online booking form or you can reply to this email with your full address and I will make the arrangements for you! We are currently working on a 7-10 day lead time to arrange a visit.
I look forward to hearing from you.
Northwick Associates Limited
27 Aintree Road
Keytec 7 Business Park