Marconi 2022C - Stopped working below 62.5 MHz
Hello,
I´ve got a Marconi 2022C and from one day to the other it stopped working for frequencies below 62.5 MHz (no output, even when I set output level to 2 Volts, it just raises the noise floor), above everything works fine, including AM modulation. It does not show any kind of error message.
I´ve got a service manual, but unfortunately it´s a bad copy and the circuit diagram is barely readable.
My first guess was a contact problem at one of the relays, but here I read that a common problem is the OM345. Could that be the case with the problem I described? Where is the best point to start investigating and does anybody know where I can get a decent copy of the service manual?
Thank you very much,
Stefan
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