• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Gemtune X1

I am trying to repair a Gemtune X1 amplifier. It had a burnt resistor on the board, I have replaced the blown resistor, but I have noticed there is no wiring coming from the live side of the power connector.

I am looking for a little insight as to where the live wire might connect in the system.
 

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I can see a wire on the bottom left of the socket. Could you take a wider photo so we can see the input wiring. I may be misunderstanding your problem.


http://www.farnell.com/datasheets/1703860.pdf


Looking at your photos correctly I think there's a thin black wire out of the transformer and a thick red wire. I think the thin black wire is the neutral and thick one live. The thin black wire should go to the mains socket N. The red should go to the tag on the lower left, and the L (broken off tag) should join with the tag next to it. The case of the unit must be connected to E.
 
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Does this help? You should have mains voltage (120V or 240V depending on where you live) between unfused live and neutral. You should also have mains voltage between fused live and neutral.

If you have mains voltage between neutral and unfused mains, but not between neutral and fused mains, your fuse is blown.

If you do not have voltage between neutral and unfused mains, there's something wrong with the power cord or the power entry module.
 

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