I just received an EMU 0404 that was sent for me to fix. Complaint is one of the channels is out.
While offlining it, I noticed that the output dc resistance for the "good" channel is around 50 ohms, but way down there at 4 ohms for the "bad" channel.
I'm thinking it's Q1 which shows the same resistance readings (bad) that Q3 does (good), so Q1 is definitely suspect. But for the life of me I can't find a valid part number for it. It has 6KI (or 8KI?) written on it, but that's all I have.
Would anyone out there happen to have a good part number? Also - is it possible that Q1 and Q3 could be those "muting" transistors? If so, then I could probably just remove it, or ?
Thanks guys.
While offlining it, I noticed that the output dc resistance for the "good" channel is around 50 ohms, but way down there at 4 ohms for the "bad" channel.
I'm thinking it's Q1 which shows the same resistance readings (bad) that Q3 does (good), so Q1 is definitely suspect. But for the life of me I can't find a valid part number for it. It has 6KI (or 8KI?) written on it, but that's all I have.
Would anyone out there happen to have a good part number? Also - is it possible that Q1 and Q3 could be those "muting" transistors? If so, then I could probably just remove it, or ?
Thanks guys.