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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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mosfet testing
is there a quick way(in circuit)to test mosfets.
bud2508 and irf9620 in particular. |
#2
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yes, but I don't think ya have the right equip for the task
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#3
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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 |
#4
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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. |
#6
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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. Important: Anything sent to the email address in the message header is ignored. To contact me, please use the Feedback Form in the FAQs. |
#7
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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. Important: Anything sent to the email address in the message header is ignored. To contact me, please use the Feedback Form in the FAQs. |
#8
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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. |
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