Group, I have a "dead" TEK 221 scope that I am trying to repair. Nothing out of t he power supply. The batteries are dead, so I removed them. Will the powe r supply operate without the batteries, power by the AC Line? Can I operat e the power supply out of the scope (disconnected from the scope)? I canno t find any indication that the first inverter is running. Checked transist ors OK. I suspect that the inverter trigger diac is defective. No way to test. Please share any thoughts that you have or past experiences. Thank you, Dave
- posted
9 years ago