is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular.

yes, but I don't think ya have the right equip for the task

im limited to a digital mm, analogue mm, and an esr tester.
what about out of circuit?

Pathogen wrote:
yes, but I don't think ya have the right equip for the task

BigTom wrote:
is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular.

BU2508 (not BUD2508) is a normal bipolar (non-FET) HOT, IRF9620 is a FET
mostly used as a series regulator (in TV sets and monitors) or as a load
capacitance switch (in monitors). Generally, test them using the diode
test of your multimeter. The HOT will measure as 2 separate diodes B-E
and B-C, sometimes the B-E reading will give you 50mV. The FET will
measure open all ways, except maybe for the protection diode between D
and S. For hints on your repair, you need to give more context so that
people can be of help.

---
Met vriendelijke groet,

Maarten Bakker.

bud2508, hehe its not like me to make mmistakes.
thanks Maarten.

wrote:
BigTom wrote:

is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular.


BU2508 (not BUD2508) is a normal bipolar (non-FET) HOT, IRF9620 is a FET
mostly used as a series regulator (in TV sets and monitors) or as a load
capacitance switch (in monitors). Generally, test them using the diode
test of your multimeter. The HOT will measure as 2 separate diodes B-E
and B-C, sometimes the B-E reading will give you 50mV. The FET will
measure open all ways, except maybe for the protection diode between D
and S. For hints on your repair, you need to give more context so that
people can be of help.

---
Met vriendelijke groet,

Maarten Bakker.

BigTom writes:

is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular.

HeHeHe.... If it isn't shorted, it's probably good.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
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D and S should only test one way like a
diode and not the other way, and between
D and G - S and G there sould be no
continuity open.
first short all pins to drain any field curent.

john



"Sam Goldwasser" wrote in message
...
BigTom writes:

is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular.

HeHeHe.... If it isn't shorted, it's probably good.

--- sam | Sci.Electronics.Repair FAQ Mirror:
http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ:
http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites:
http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the
excessive
traffic on Repairfaq.org.

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"D MARSHALL" writes:

D and S should only test one way like a
diode and not the other way, and between
D and G - S and G there sould be no
continuity open.
first short all pins to drain any field curent.

http://repairfaq.ece.drexel.edu/sam/semitest.htm#stmos

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header is ignored.
To contact me, please use the Feedback Form in the FAQs.