I have an Orange Crush 12L practice amp that suddenly stopped working around the same time my Danelectro Nifty Fifty (which I made another thread about) started malfunctioning. I get no sound through speaker or headphone jack.
This one has a 4558 as IC1 so I reused the trouble shooting from the Danelectro Amp (which uses an TL072, but I believe they have the same pin out) Using Enzo's helpful advice from the other thread I tested the DC Voltage on the pins and got
Pin 1: 0
Pin 4: -14
Pin 7: 13
Pin 8: 13
So I assume this IC has gone bad, correct? My understanding is that Pin 7 should read around zero. I tested the sound using an audio probe as well, I was able to trace sound from the input jack to a capacitor but then the signal goes to IC1. Testing the other leg of the capacitor I got no sound. I pulled the capacitor and was able to run a signal through it fine.
I plan on ordering another 4558 IC chip, but is there anything else I should be checking?
This one has a 4558 as IC1 so I reused the trouble shooting from the Danelectro Amp (which uses an TL072, but I believe they have the same pin out) Using Enzo's helpful advice from the other thread I tested the DC Voltage on the pins and got
Pin 1: 0
Pin 4: -14
Pin 7: 13
Pin 8: 13
So I assume this IC has gone bad, correct? My understanding is that Pin 7 should read around zero. I tested the sound using an audio probe as well, I was able to trace sound from the input jack to a capacitor but then the signal goes to IC1. Testing the other leg of the capacitor I got no sound. I pulled the capacitor and was able to run a signal through it fine.
I plan on ordering another 4558 IC chip, but is there anything else I should be checking?