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I am working on a stereo receiver and was going to resolder some wiring. When I went to strip one wire on the 3-wire cable, the whole wire pulled out that was bare except for the half inch I was going to strip off of. There were only 2 wires on other end soldered to the PCB. The 3-sided part I was going to reattach to PCB each had a different pin to solder to.

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    \$\begingroup\$ Please add photos \$\endgroup\$ – Dwayne Reid Sep 30 at 23:42
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    \$\begingroup\$ The 3rd wire may be the screen. The boards may be earthed via different cables : the screen is then connected at one end only to prevent an earth loop which would pick up magnetic hum. \$\endgroup\$ – Brian Drummond Sep 30 at 23:53
  • \$\begingroup\$ Thank you so much, I kinda suspected maybe a ground but your comment makes so much sense . My main concern was can I fix it and yes can do. The stereo is a Pioneer SX 1250 160wpc thank you . you people are great..... \$\endgroup\$ – Daniel Meneses Oct 1 at 2:55
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It could be a 2-core shielded cable, with the shield wired only at the PCB end to avoid hum loops.

Here's one such example of 'Line in' RCA jacks, on a metal chassis, wired to a preamplifier PCB.

enter image description here

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