New to this forum Oliver suggested I come here and post this issue. It is a similar issue posted in the link below in 2012 but there is no solution to this problem though.
I’m working on a midnight filter board everything powers up fine but no sound (note: it still powers the control board with no apparent issues) Checked all contacts and soldering points and everything right at this point is directing to CP1 LT1054 DC/DC converter.
I’ve checked for sound and I have to put the gain up full volume to hear anything. There is slight sound but mostly hiss and static.
I’m using a 9 v 1000 amp wall wart power supply. I plugged power wall wart into another midnight board to see if it is another issue but not the case. Other board works fine. I get a reading of 7.84 v coming into pin 1 on the LT1054 and gets extremely hot.
This is a mystery I’ve ordered 3 more of these LT1054 chips to backup just in case. Pleeeeaaassee help.