Diskuzní fórum Elektro Bastlírny

Check all soldering points. Measure voltage at main capacitor (300V) it can't go down under load. Check resistance of curent measurment resistor in source of Q1. Check voltage on small electrolitic near U1, replace this cap. What is the type of U1? Can You post botom side of board?

I'm from Poland. This metter is unpopular in poland, i found damaged unit on auction. In manual i only found some state table but i can't restore all ROM data.

I found this auction and send mesage using aukro account but i dont have any answer. Good news is I found blank 74188 and I have beeprog programer to write it.

I have damaged BM591 RLC metter - one of the 74188 memory are mising. I have programmer amd blank chip but i need memory dump.