Bench Power Supply Test & Repair - Extech 382270 Quad Output DC - part 1

The ‪@buffett1978‬ dropped 3 of these bad boys off and I take a crack at testing and repairing them. Wish me luck. 00:00 Intro 02:32 PS #1 Initial Test 06:42 PS #2 Initial Test 10:53 Inside PS #2 12:38 PS #3 Questionable Assembly 18:53 PS #3 Reassembly/Inside #1 22:40 PS #3 Initial Test / Fail 27:32 Control Board Repair 31:04 CH2 & CH4 working, CH1 bad 32:42 CH1 Repair 41:08 Found the knob