Hi everyone i am a huge fan of the youtube show , i am about to graduate from mechatronic engineer recently a friend of mine asked me to take a look on his EQ so i checked it turned out to had a shorted out power suppy 2 7818 regulators where bad also 2 bad fuses
Repaired that and i was happy PSU worked tested voltages -18v 0v 18v everything good (isolated)
But when i plugged the Psu Back to the system Fuses POP again , took out the next PCB(input side) , changed 2 small capacitors noticed 2 traces missing so i jumped them with wire , still have a short somewhere i think it may be inside the input relay buy not sure , maybe a diode any suggestion , it also has 2 5532 op amps witch may be dead (don´t know how to check no visual damage)
Almost forgot on the voltage input for this pcb i have (-v 0v +v) -v and 0v gave me short circuit
Thanks a lot , i have theoretical but no real practice
The old beast
http://www.bhphotovideo.com/c/product/493335-REG/Klark_Teknik_DN360_DN360_Graphic_Equalizer.html Service Manual Page 12 is where i isolated the problem
http://bee.mif.pg.gda.pl/ciasteczkowypotwor/stage/Klark%20Teknik/KlarkTeknik-DN360%20equal.pdf