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Re: 857 Static protection

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  • wa9fvp
    I repaired one that had a damaged CPU. But I repaired several Icom 718 s with the same problem. The mod is also the same. Even if the CPU is OK, every 897
    Message 1 of 4 , Oct 29, 2012
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      I repaired one that had a damaged CPU. But I repaired several Icom 718's with the same problem. The mod is also the same. Even if the CPU is OK, every 897 and 718's that I repair, I automatically do the mod.

      --- In FT897@yahoogroups.com, "D.J.J. Ring, Jr." <n1ea@...> wrote:
      >
      > Since Jack is modest, unless I am very mistaken he has been fixing Yaesu
      > radios in the Chicago area for the last 20 years.
      >
      > A big thanks to you Jack and I really hope this modification isn't one that
      > you made after actually seeing this seemingly unlikely turn of event
      > actually happen, is it?
      >
      > 73
      > David N1EA
      >
      > On Fri, Oct 26, 2012 at 9:45 PM, wa9fvp <willcoele@...> wrote:
      >
      > > I just uploaded a file in the Files section FT_897_Static_Protection.pdf.
      > > When you walk across a carpet especially in the winter, you can draw a
      > > static discharge that's a few inches long. When you grab the FT-857 volume
      > > control it can arch across the plastic knob and discharge into the volume
      > > control. The control has a metal shaft and body and it's not connected to
      > > the chassis. The control connects directly to the CPU on the front panel
      > > and the discharge can damage the chip.
      > >
      > > My modification will protect the CPU by grounding the control to the
      > > chassis.
      > >
      > > Jack WA9FVP
      > > Willco Electronics.
      > >
      > >
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      >
      >
      > [Non-text portions of this message have been removed]
      >
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