Hi all , I have a Marantz 2385 that has an offset problem on the right channel , 109mV.
The 2k pot used to adjust the offset has absolutly no effect on the offset reading. I have checked the pot and it seems to work fine.
I had thought that the problem had to be in the matching of the input stage transistors(2SC177AE), bu tafter doing some reading I'm not so sure anymore!!
Is it more likely to be a capacitor or resistor problem????
What should I be looking at first?
I am finding it difficult to source the transistors and I am worried about getting a lesser quality for replacements, nevermind trying to match them better than Marantz did...
The 2k pot used to adjust the offset has absolutly no effect on the offset reading. I have checked the pot and it seems to work fine.
I had thought that the problem had to be in the matching of the input stage transistors(2SC177AE), bu tafter doing some reading I'm not so sure anymore!!
Is it more likely to be a capacitor or resistor problem????
What should I be looking at first?
I am finding it difficult to source the transistors and I am worried about getting a lesser quality for replacements, nevermind trying to match them better than Marantz did...