marcbarker
New Member
Does anyone recognise what these ICs are ?
It's a PWM driver module for a DC motor speed control. It drives an IRFP460 MOSFET. All the numbers burnt off the capacitors when I dissolved away the epoxy resin potting compound.
You can see 3 ICs but I don't know what they are as the markings had been ground off by the manufacturer. The transistors hadn't though, they are mostly NPN, but there's a PNP and a 2N7000.
**broken link removed**
Here's some more info.
I decided earlier today to do some reverse-engineering, to find out what's inside an ECU. ECU is out of my treadmill excerise machine that stopped working.
There's a diode bottom left, but it's open circuit.
I have erased the PCB photo, but left the ICs, the transistors, polarised capacitors and an open circuit diode un-erased.
It's a PWM driver module for a DC motor speed control. It drives an IRFP460 MOSFET. All the numbers burnt off the capacitors when I dissolved away the epoxy resin potting compound.
You can see 3 ICs but I don't know what they are as the markings had been ground off by the manufacturer. The transistors hadn't though, they are mostly NPN, but there's a PNP and a 2N7000.
**broken link removed**
Here's some more info.
I decided earlier today to do some reverse-engineering, to find out what's inside an ECU. ECU is out of my treadmill excerise machine that stopped working.
There's a diode bottom left, but it's open circuit.
I have erased the PCB photo, but left the ICs, the transistors, polarised capacitors and an open circuit diode un-erased.