While troubleshooting my PSU for Philips 42PFL7403D I ran into the optotransistors 7202 and 7214.
They are named TCET1102. Im looking at schematics for this component and Im trying to figure out
how I can check if they are working as they should. When I compare them with a ohm-meter I get different readings on them..
As I understand there's a diod between pin 1 and 2. So, it should lead current from pin 1 from pin 2. Also it should open for current from pin 4 to pin 3 while current goes from 1 to 2. Right?
But, if there's no current at all on pin 1 and 2, should pin 3 and 4 be completely isolated?
Topic: Fault check opto-transistor (Read 3316 times)