i took the board out and started testing some things but i need some help. i tested 5 n-channel mosfets on the board 1 was 2sk2655 and 2 of them were k3911 and 2 were k2698 here is what i got i don't know if i am doing it correctly i see a million different ways people check mosfets but this is the way i did it maybe i am wrong but i am trying to figure out if they are good or bad i think 1 might be bad but here are the readings.in diode mode
2sk2655 readings
-lead +lead
g-d OL
g-s 170
d-s 521
+lead -lead
g-d OL
g-s 1783
d-s OL
k3911 readings
-lead +lead
g-d OL both
g-s 1530 both
d-s 474 both
+lead -lead
g-d OL both
g-s 1690 both
d-s OL both
k2698 readings
-lead +lead
g-d OL both
g-s 780 both
d-s 510 both
+lead -lead
g-d OL for 1 mosfet and other reads 760 and climbs up
g-s OL both
d-s OL both
the 1 that climbs up is the 1 i am guessing is bad and they were all tested in circuit. should i take the 1 that climbs up out of the board and recheck? or do they all need to be taken out?
part#str-f6167 it is a OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR made by sanken but anyways is it possible to check them and if so how is it done? i checked it in diode mode and here is what i got. it has 5 pins so i'm gonna show all the checks i did pin 1 being on the left with it attached to the heatsink pins 2 and 4 furthest away from heatsink.
str-f6167 readings
- pin# + pin#
1-3 OL
1-5 OL
3-5 OL
1-2 220
1-4 OL
3-2 520
3-4 OL
5-2 797
5-4 OL
2-4 OL
+ pin# - pin#
1-3 785
1-5 1050
3-5 OL
1-2 220
1-4 860
3-2 OL
3-4 OL
5-2 OL
5-4 OL
2-4 601
i hope someone can understand what i did and give me an answer to my questions. thanks in advance
2sk2655 readings
-lead +lead
g-d OL
g-s 170
d-s 521
+lead -lead
g-d OL
g-s 1783
d-s OL
k3911 readings
-lead +lead
g-d OL both
g-s 1530 both
d-s 474 both
+lead -lead
g-d OL both
g-s 1690 both
d-s OL both
k2698 readings
-lead +lead
g-d OL both
g-s 780 both
d-s 510 both
+lead -lead
g-d OL for 1 mosfet and other reads 760 and climbs up
g-s OL both
d-s OL both
the 1 that climbs up is the 1 i am guessing is bad and they were all tested in circuit. should i take the 1 that climbs up out of the board and recheck? or do they all need to be taken out?
part#str-f6167 it is a OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR made by sanken but anyways is it possible to check them and if so how is it done? i checked it in diode mode and here is what i got. it has 5 pins so i'm gonna show all the checks i did pin 1 being on the left with it attached to the heatsink pins 2 and 4 furthest away from heatsink.
str-f6167 readings
- pin# + pin#
1-3 OL
1-5 OL
3-5 OL
1-2 220
1-4 OL
3-2 520
3-4 OL
5-2 797
5-4 OL
2-4 OL
+ pin# - pin#
1-3 785
1-5 1050
3-5 OL
1-2 220
1-4 860
3-2 OL
3-4 OL
5-2 OL
5-4 OL
2-4 601
i hope someone can understand what i did and give me an answer to my questions. thanks in advance
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