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Beocenter7007

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mikecampbellmqc@outlook.com posted on Sun, Aug 22 2021 11:36 AM

I cannot get any sound out of the system when using the Phono. I've fitted a new MMC4 cartridge to no avail.

I inspected the mechanism from below, there seem to be 4 wires (tiny) which are soldered to a connector block which in turn I assume connects to the the amplifier. Has anyone any suggestions as to what might be wrong?

Mike

 

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Dillen
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Dillen replied on Sun, Aug 22 2021 11:53 AM

If the other sources (Tape/Radio) play normally, check the supply to the RIAA circuit.
Let us know the DC voltage readings on each of the three pins of 17TR8 with reference to ground.

Martin

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