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Post by marius on May 28, 2019 21:14:20 GMT
I have audio from the tonearm cable and power to the amplifier(at least the relay on the amplifier engages),but nothing after that.Should I start replacing caps ?
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Post by Ron Rich on May 28, 2019 22:09:48 GMT
Not enough info here to diagnose the problem--How do you know you have audio from the tonearm ? How do you know that the amp power supply is working (relay may be a function independent from amp's power supply ?) Do you have the schematic--do you have the needed skills to trouble shoot that amp--did you just get this phono, or have you had it for awhile, and it just quit having audio ? Changing "caps", may help, if the power supply is not working, or coupling caps are bad-- but also could be a waste of time/money. Ron Rich
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Post by marius on May 29, 2019 11:30:06 GMT
I apologize,here's what I'm working on.It's a Rock-Ola 467 with a 50335-A mono amp.I do have a schematic but it's for the stereo version.I unplugged the tonearm cable from the amp and connected it to a home amp and had sound.I have experience repairing tube radios,pinball machines and jukeboxes.I'm trying to repair this for a friend who told me that the machine had sat for awhile and was working the last time he used it.I certainly would appreciate any help or suggestions you may have.
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Post by Ron Rich on May 29, 2019 12:46:12 GMT
Trouble shoot it the same as any amp--only one factor different is the mute function, which should be the same for either a mono, or stereo amp.
Ron Rich
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