I=B4ve check the transistor but is fine (this is a chopper tansistor
from a SMPS from a 15^ monitor) can the chopper transformer be shorted
to ground? How can I find out? I=B4ve red about =A8ring test=A8 but some
of the equipment listed I do not have.
Is the only cause of this a short to ground? Can there be something
alse happening?
Thanks.
Gary

"Stephan Urban" wrote in message
...
Hi,

what kind of problem do you have with the monitor?

Is the heatsink connected to ground?
I have an AT power supply, where the chopper transistor has a metal
backside, connected to the 300VDC from the rectifier.
So the heatsink is live under normal condition. (Quite a surprise if
someone wants to feel for the temperatur. Ouch.)



Yes, or if you accidently bump it with your knuckle while probing elsewhere
on the board, ouch indeed!

Hi,

what kind of problem do you have with the monitor?

Is the heatsink connected to ground?
I have an AT power supply, where the chopper transistor has a metal
backside, connected to the 300VDC from the rectifier.
So the heatsink is live under normal condition. (Quite a surprise if
someone wants to feel for the temperatur. Ouch.)

Stephan

I´ve check the transistor but is fine (this is a chopper tansistor
from a SMPS from a 15^ monitor) can the chopper transformer be shorted
to ground? How can I find out? I´ve red about ¨ring test¨ but some
of the equipment listed I do not have.
Is the only cause of this a short to ground? Can there be something
alse happening?
Thanks.
Gary