picked up another project . This is a HEART/TRACE inverter that dates to
1989 . Initially the unit would not output or charge the battery .
The unit is old enough that the tech is no longer supported by any
authorized service centers . I figured , as long as its a potential
boat anchor , might as well open her up and see whats clicken .
Initial visual inspection found a blown filter capacitor , on the charger output.
Which is not unusual . Kinda like fixing old ham radios , one expects the caps to die with age .
The other thing that i found was that the rest of the circuitry was prime .
No burnt wire traces , No blown fuses , no scorched resistors . Once i've
replaced the bad cap , we will try a PWR up test .
The other FUN aspect is , the company never released any TECH DOCS
other than owners' manuals . So , i'm shootin in the dark , so to speak..
Armed with my general knowledge of inverters , this one looks fairly typical.
Controler brd , MOSFET drivers , xfmer , circuit brkrs . Instead of a CPU ,
they used a Field Programmable Gate Array IC , which has 3,ooo odd gates.
And of course , here am I w/o a program sheet for how they configured it.