Have an smps out of a HP Compaq with no output.
Tracked down to no startup voltage whatsoever. Checked all surrounding components which appear ok.
Curious about the ( TVS) P6KE200A diode as it shows a similar diode in the attached schematics.
Actually the circuit below is almost identical in the HP unit which uses a TNY268 switcher.
Diode tests ok as far as diode test is concerned but both in the schematic below and on the board in question it is shown with zener characteristics.
I removed the diode and tested it on a zener tester which showed 12.9v.
Am I barking up the wrong tree here or should the P6KE200A not be higher than that and how would one test it anyhow...?
Tracked down to no startup voltage whatsoever. Checked all surrounding components which appear ok.
Curious about the ( TVS) P6KE200A diode as it shows a similar diode in the attached schematics.
Actually the circuit below is almost identical in the HP unit which uses a TNY268 switcher.
Diode tests ok as far as diode test is concerned but both in the schematic below and on the board in question it is shown with zener characteristics.
I removed the diode and tested it on a zener tester which showed 12.9v.
Am I barking up the wrong tree here or should the P6KE200A not be higher than that and how would one test it anyhow...?