Hi All. I am a DIY'er who is kin on electronics. I never received any formal training on electronics, but I learned a great deal because of helpful websites such this one!
My current project is my LifeSpan 2.25 HP Treadmill, with a motor control board TD-1600N. I have spent the last 3 months troubleshooting it, and now I am stuck, so hopefully someone will be kind enough to point me at the right direction.
I have contacted the manufacture for technical support, but to no avail. They won't provide repair manual/schematics. They just want to sell a new board at outrages amounts of money and get you to buy a new belt while at it. I figured I could do better by fixing it myself, all the while learning about electronics which I enjoy greatly.
I believe I put too much load on the board by not lubricating the belt properly, and burned a transistor/IC somewhere. It was working fine one day. I turn off the AC switch on the treadmill each time, thinking that would preserve the capacitors. The next time I turned on the AC switch, the treadmill turns on properly, but when I start the motor, it won't turn.
I tested the DC motor with 12 volt, and it works. I traced the problem to the main motor's relay, which is not engaging with a "click" sound. I tested the 12v relay's protection diode, and it has 16v going across it when the motor is supposed to turn. Thinking it must be a faulty relay, I replaced it with a Panasonic unit. Relay still won't engage. The relays on the elevation up/down motor works fine, however.
After that it was a wild chase. I have replaced:
3 Relay protection diodes
3 Opto Coupler / Opto Isolators
a 2TY PNP Transistor with a S8550
I traced the board and drew some *ugly/sorry* schematics on Visio. I even went as far as making my own daughter board for the main motor relay to engage AC if 16 volt is detected across the protection diode. The daughter board did engage the relay and turned on the DC motor, but it churned out like 160 volts and the motor went 100 MPH. Not very helpful unless you are the 6 million dollar man!
So my latest wild guess is the PWM. On the picture below you can see the red arrow pointing at a 14-pin IC with its markings scratched off by the manufacturer. I wonder if that is the cause, and, what I can replace it with? Any suggestions greatly appreciated! (It is the "?" in the schematic, and I think "CTRL" goes up to the treadmill's control panel)
-AresROC
My current project is my LifeSpan 2.25 HP Treadmill, with a motor control board TD-1600N. I have spent the last 3 months troubleshooting it, and now I am stuck, so hopefully someone will be kind enough to point me at the right direction.
I have contacted the manufacture for technical support, but to no avail. They won't provide repair manual/schematics. They just want to sell a new board at outrages amounts of money and get you to buy a new belt while at it. I figured I could do better by fixing it myself, all the while learning about electronics which I enjoy greatly.
I believe I put too much load on the board by not lubricating the belt properly, and burned a transistor/IC somewhere. It was working fine one day. I turn off the AC switch on the treadmill each time, thinking that would preserve the capacitors. The next time I turned on the AC switch, the treadmill turns on properly, but when I start the motor, it won't turn.
I tested the DC motor with 12 volt, and it works. I traced the problem to the main motor's relay, which is not engaging with a "click" sound. I tested the 12v relay's protection diode, and it has 16v going across it when the motor is supposed to turn. Thinking it must be a faulty relay, I replaced it with a Panasonic unit. Relay still won't engage. The relays on the elevation up/down motor works fine, however.
After that it was a wild chase. I have replaced:
3 Relay protection diodes
3 Opto Coupler / Opto Isolators
a 2TY PNP Transistor with a S8550
I traced the board and drew some *ugly/sorry* schematics on Visio. I even went as far as making my own daughter board for the main motor relay to engage AC if 16 volt is detected across the protection diode. The daughter board did engage the relay and turned on the DC motor, but it churned out like 160 volts and the motor went 100 MPH. Not very helpful unless you are the 6 million dollar man!
So my latest wild guess is the PWM. On the picture below you can see the red arrow pointing at a 14-pin IC with its markings scratched off by the manufacturer. I wonder if that is the cause, and, what I can replace it with? Any suggestions greatly appreciated! (It is the "?" in the schematic, and I think "CTRL" goes up to the treadmill's control panel)
-AresROC
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