Well I just had to share about something I just discovered. I recently picked up a DIA-150 integrated amplifier off Kijiji for $100 bucks because it wouldn't power up. I thought it was a great deal and maybe I could fix it. I tested the amp sections and they were fine. The problem seemed to be on the control board because it just wouldn't power up.
So I dissembled the entire amp, something you got to do to get at the the control PCB. And after some investigating and removing parts I found the culprit. Someone had removed the filter cap for this board and carefully cut through the copper trace leading to the voltage regulator that powers up the on/off and input selector circuit. Then they resoldered the capacitor back into place so no one could see their handy work.
Man, that is greasy. Someone either really didn't like this guy or it was a ploy to buy the amp for really cheap claiming it couldn't be repaired.
It also looks like the volume pot has been sprayed with some kinda oil.
So I dissembled the entire amp, something you got to do to get at the the control PCB. And after some investigating and removing parts I found the culprit. Someone had removed the filter cap for this board and carefully cut through the copper trace leading to the voltage regulator that powers up the on/off and input selector circuit. Then they resoldered the capacitor back into place so no one could see their handy work.
Man, that is greasy. Someone either really didn't like this guy or it was a ploy to buy the amp for really cheap claiming it couldn't be repaired.
It also looks like the volume pot has been sprayed with some kinda oil.
