Re: Fixing the unrepairable IC7000
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Craig, From what you observed, it does sound like they were replaced. I've run across this with stereo gear. It's usually recommended by experienced techs to replace with what was there if it was working properly. It is definitely confusing though. Bob W4JFA
Fair point Bob about the making a change from the manufacturer.? The 2 capacitors i mentioned were a different brand than the others of the same rating and the solder joints didn’t look the same as the others in the display board, so to me, it looks highly suspicious that they have been replaced before. ?
Unfortunately, I know very little about the history of this radio except it was purchased in 2011 from HRO and it died after the car it was in, was in an accident.? My dad was gifted it from my grandfather, not knowing it died, and when my dad couldn’t get it to work, he shipped it off for repair and received it back being told it couldn’t be repaired.? ? Every once in a while if you find a part that doesn't match the schematic, such as you found a 47uF where you? expected a 100uF, doesn't always mean?someone installed the wrong part. Sometimes the manufacturer?will make a change and it doesn't make all the schematics already out in circulation. Sometimes it's just a plain error so when you find something like this, look into it further and don't assume. Bob W4JFA On Tue, Feb 11, 2025 at 10:39?AM Mark Brueggemann K5LXP via <qrq_cw= [email protected]> wrote: On Saturday, February 8, 2025 at 07:09:27 AM MST, Craig- KB4RU via <ki4coa=[email protected]> wrote:
> Inspiration for others.
> Hopefully this helps someone else have some hope in restoring their IC-7000
Your story reinforces what is a very typical scenario during repairs of most anything.? Yes, sometimes thing fail in spectacular ways (lightning strike, water damage) that make a repair attempt futile but in most cases the issue is confined to a specific part or functional assembly.? In a past life I was a commercial radio bench tech and fixed thousands of radios, most of that was isolating the fault to a given part, replace it, and off it goes again.? Odds of fixing it are in your favor, *if you try*.? Hams get freaked out over surface mount and yeah, sometimes getting in there to poke at a test point with a scope can be a challenge, but there's nothing magic about it.? Take your time, be methodical and odds are you'll find something obvious.? You'll never find it if you never try.
Mark K5LXP
Albuquerque, NM
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Bob