I have a Power Cool UPS to fix seems to have festered its mains plug blowing a 13A fuse now will not fire up correctly, output rises to over 250v before shutting down.
I think the key fault maybe its IC HR6P72P4DL a 28 pin DIL chip which I think is like a PIC chip with a program, I suspect its a variety of TI chip re branded like many others.
If anybody can help with a circuit it will help try to figure things out.
I have changed the two 22uf 100v which seem to be a snubber to its power Mosfets 3 x 24v relays with 1 x 12v relay plus a LM324 underside the pcb.
Hope you can help
Thanks From David
I think the key fault maybe its IC HR6P72P4DL a 28 pin DIL chip which I think is like a PIC chip with a program, I suspect its a variety of TI chip re branded like many others.
If anybody can help with a circuit it will help try to figure things out.
I have changed the two 22uf 100v which seem to be a snubber to its power Mosfets 3 x 24v relays with 1 x 12v relay plus a LM324 underside the pcb.
Hope you can help
Thanks From David
Attached Files