Quote:
Originally Posted by SolomonMan
Back at it again....
....
So I am going to go forward with the KA7500B IC swap.
...
When I test the P75NF75 FET. I assume its best to get it out of the board.
Test (1)
Pin 1 to 2 or Pin 1 to 3 should not have continuity (be shorted).
Test (2)
Pin 3 (Multimeter Red Lead) to 2 (Black) should have continuity (shorted).
Test (3)
Reverse Leads should not have continuity.
Below is mouser datasheet for reference.
https://www.mouser.com/datasheet/2/3...71-1795852.pdf
Thanks in advance,
Chris |
All,
Held off on KA7500B IC replacement....Went straight after the P75NF75 FET to test outside the circuit. It was simple enough to do and if I found an issue I hate to have the IC replacement play havoc in my troubleshooting. Not to mention I can do the KA7500B IC replacement if the FET tests ok.
RESULTS
Test (1)
Pin 1 to 2 or Pin 1 to 3 should not have continuity (be shorted).
This Tested as Expected no short between pins 1 and any other pin.
Test (2)
Pin 3 (Multimeter Red Lead) to 2 (Black) should have continuity (shorted).
SHORTED
Test (3)
Reverse Leads should not have continuity.
SHORTED
I have a Short regardless of lead choice between Drain and Source.
So I am going to order the P75NF75 FET.
Keep you all posted.
Chris