bryce Goggin
New Member
My compressor blows fuses if its not ramped up slowly. The +15 rail of the supply is up to 20vdc and the 2k trimmer r29 has no effect. I tried another potentiometer with no luck. It does change the voltage feeding back to IC 3 but not the output. All of the other voltages are in range and adjustable.
When I first opened the lid R16, R20, R21,R22, R23 looked like they suffered from some heat. I replaced them, recapped it, and replaced Q5, Q6, Q7, Q8. I tested the rectifiers and they all seem to be good. I disconnected the ribbon connectors to the rest of the circuit and stll blew fuses. Replaced D11, D12 and IC3-5 with no luck.
This all occurred before the purchase of variac. After ramping up the AC and disovering the problem with the +15 volt rail I found a bad diode (D16) I replaced it along with Q11 with no improvement. Anybody have any clues?What progam do you use to write text on pdfs or jpegs?
When I first opened the lid R16, R20, R21,R22, R23 looked like they suffered from some heat. I replaced them, recapped it, and replaced Q5, Q6, Q7, Q8. I tested the rectifiers and they all seem to be good. I disconnected the ribbon connectors to the rest of the circuit and stll blew fuses. Replaced D11, D12 and IC3-5 with no luck.
This all occurred before the purchase of variac. After ramping up the AC and disovering the problem with the +15 volt rail I found a bad diode (D16) I replaced it along with Q11 with no improvement. Anybody have any clues?What progam do you use to write text on pdfs or jpegs?