Hi. I'm new to this forum so I hope you might be able to help. I've been asked to service a AVT 50H, but don't have a circuit diagram. On the pre-amp board resistor R58 is showing signs of getting over heated. Measuring it in-situ it appears to be 15K, do you know if that's right?
You mention upgrading some components, which would you recommend for upgrade?
Where can I get a circuit diagram?
Thanks in advance for any help you can give me.
