"Martin Riddle" wrote in message
...

"Oppie" wrote in message
...
Just got a schematic from Pramac - current owner of the Powermate brand.
It's an Italian company. Homelite owned the brand for a while.

Sort of threw me when I looked at the schematic. PWR1 and PWR2 windings
are
the output of the generator (110/220V). AVR is the Automatic Voltage
Regulator which may be part of the problem. EX1/EX2 look to be part of
the
stator and provide AC to the rectifier / Cap which in turn feeds DC to
the
AVR module. Would guess that the field winding (armature) is the coil
marked
+/- at the bottom. Not shown but it is fed by brushes. This is not a
brushless generator.

"Module I.C." is the automatic Idle control that drops engine to idle
when
there is no load. Commonly used on construction sites when driving only
one
large tool.


============
Need to troubleshoot a broken generator.
Powermate Vertex 7500W
Model PM0557523.9

Found owner's manual and parts list but no schematic / wiring diagram.

Anybody have some resources? The usual googling just gave me more of the
same. Tried re-exciting the field to no avail. lead had come off of the
capacitor and looks to have been sparking against something. Trying to
make
sense of what might have failed.




What does it not do?

If no output is the first guess, try flashing the field.
Disconnect the EX connection and feed 12V DC into one of them. Will setup
a mag field and allow everything to start up.

Cheers


Owner's manual describes how to re-energize the field (leave a residual
magnetism that will bootstrap up to full output with the generator
spinning). It recommends a 6V lantern battery. I would suspect that using a
higher voltage might stress components on the voltage regulator board.

No output so far. As described in original posts, found a wire had come
loose from the capacitor and had evidence or arc marks. Going to take a
closer look today to see what might have been killed.