I did, but the readings were all over the place. They weren't much different than the left, however. I'm guessing that the meter was being influenced by the actual program material.
I would agree, but it started doing this with all stock components and it was never worked on. I have now replaced everything with no luck. I (once again) pulled all of the resistors and found nothing out of spec. So, maybe it's a voltage issue...but I have no idea what the correct voltages...
Both amps are getting the same voltage. I've tried so many things...I'm sure I did measure the DC just before it clicks....but I will try it again tonight. I took this receiver on as a favor for a friend. I should have known better...
I appreciate the "interrogation," BTW. I feel stupid for not being able to locate this problem. Everything seems to check. Soooo frustrating. It's tough without a theory of operation or schematic. I'm flying blind.
Any signal that I pump through it - either via the built-in preamp or using a music player feeding the main amp-in jacks - once the volume gets to a moderate volume on the right channel, the protection kicks in. Any input of any strength on the left input doesn't. So, let's say I chose the AM...
Basically, I've run out of ideas. All of the diodes have been replaced. All of the transistors and caps as well. The problem stays on the right channel, even if I physically swap the amp boards and outputs. It has to be in the protection circuit. Even with the pre-amp decoupled, it does...
Thank you! I'll try that tonight - and I actually have some at home. The drive transistor has been replaced as well with a NOS transistor. If this doesn't work, I'm just going to have to bypass the relay and see if anything pops. This unit is really getting to me! I'm out of ideas...
I've been working on this Project One Mark IIIB for weeks now (on and off). Long story short, the protection relay activates on the right channel - mid volume - with or without a load. I have isolated the preamp/amp, swapped amp boards and outputs (left to right), replaced all transistors, all...
I took on a project (pardon the pun) for a friend of mine who is trying to get his brother's old Project One Mark III stereo working again and surprise him with it. He initially told me it was "blown." Honestly, I couldn't find any issues other than really grubby switches and frozen meters...
I took on a project (pardon the pun) for a friend of mine who is trying to get his brother's old Project One Mark III stereo working again and surprise him with it. He initially told me it was "blown." Honestly, I couldn't find any issues other than really grubby switches and frozen meters...
OK, an update (of sorts). I replaced the outputs on that channel and it cleared up *most* of the issue. Now I'm fighting something else, but I thought it was part of the original problem. The right channel is much stronger than the left. I tested voltages and everything was fine. I injected...