Name the regulator designation.
I have a few karcher packs with the 0v cells and that burnt resistor
kc8adu
Super Moderator
Last Activity: 08-09-2026, 07:33 AM
Joined: 11-04-2003
Location: dayton ohio
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You might try reflowing bad ram.
Just for the hellofit i had a oddball module for a machine control that was bad but responded to pressure. it was going to take 6 weeks to get one so i put a tiny bit of flux on it and set it on the reflow plate.
Washed the flux off and it tested fine.
Customer got the new one just in case but its still stableLeave a comment:
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Li ion cells that low should not be charged.
And when the bms bricks itself some turn on the balance resistors to drain the cells.
Dont know if the eve cells have high self discharge or the bms drained them.
I rebuilt a p191 and it had eve cells at 0v and rusting through the jackets.
Welded 10 new cells in and slapped it on the charger . good to goLeave a comment:
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Re: Requesting Help Identifying tiny Aluminium electrolytic
yes 10uf 16v.
gp leaded parts or mlcc/tantalum work as replacements.
replaced probably 5000 of those in motorola spectra/astro spectra alone.Leave a comment:
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Re: Any more info on counterfeit Nichicons?
here are the replacements from digikey....Leave a comment:
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Re: Any more info on counterfeit Nichicons?
recent finds.
high probability of counterfeits....Leave a comment:
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Re: The Hall of Shame - Badcaps Photo Montage
Motorola quantar repeater supplies burn up just like that.
And its leaking electrolyte that set it off.
I recap them on sight.
Just did one for a uhf p25 system i am putting on the air....Leave a comment:
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Re: UPS issue
Random noname chinese/vietnamese agms are good for no more than 2 years if you are lucky.
I pick good quality metal units and run with external truck batteries.
Hours of backup rather than minutes.Leave a comment:
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rubycon mh series 1000@16 10x12mm.old or fake?
All the mh mh5 mh7 ect are subminiatures with no 1000uf@16v.
Ancient or fake?
Found in the power supply of my logical devices chipmaster 6000
Compare to a mbz i had handy...Last edited by kc8adu; 02-28-2022, 03:40 PM. -
Re: Callins capacitor?
those are always shot in anything i see them in.
just had a zenith trans oceanic where 1 was so leaky it exploded when the customer put in a set of charged nicads.
i suspect that epoxy seal cracked with thermal cycling and they (mostly) dry out.
they are replace on sight 1st step of restoration.
they were junk within a few years when the radios were relatively new.Leave a comment:
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Re: Dell P2412h LED monitor shows pink tint in white screens
i almost forgot.
pull the lvds and power up.
is the screen now white?
or is it pink?
white means the backlight color is ok.Leave a comment:
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Re: Dell P2412h LED monitor shows pink tint in white screens
look at the light shining through the translucent parts of the panel back.
or through holes.
normally led backlights look like daylight fluorescents or 6500-8000k.
i had a 24" samsung with the connector broke off the strip that i repaired.
when i tested the strip i notices the color was about 5000k with a noticeable red spike.
but the monitor looked perfect when i reassembled it.
its far more common though to fade to a dim blue.
just fixed some off road led lightbars for a...Leave a comment:
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Re: HP BIOS unlock tool
looks like the .rar got corrupted.Leave a comment:
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Re: Dewalt DC012 Shop Radio no Sound
shorted caps near the amp chipLeave a comment:
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Re: Panasonic FC series - leaking? quality gone?
note that they lasted over 87000 hours.
thats continuous.
sounded worse than it was.
but leaking and corroding unused parts?
not good!Leave a comment:
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Re: Panasonic FC series - leaking? quality gone?
had a power supply for an apple 2e i repaired 10 years ago come back to me .
all the fc were leaking from the bung.
unit runs 24/7/365 and cool.
this is not good!Leave a comment:
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Re: Computer jobs that are like kicking yourself in nuts.
its the old vista "upgrade".
which consisted of digging xp drivers for stuff that supported it but was intentionally not supported by the mfr of the system.
no doubt a kickback scheme from micro$not.
7 WILL become the new xp!...Leave a comment:
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Re: Razer Naga Mouse Keys Working but no Movement
its likely a bad optical sensor.
with luck its just the led but many nowadays are integrated.
razer stuff tends to be cheaply built and unreliable so no surprise.
i just replaced switches on a 6 month old deathadder.
our group now avoids razer stuff like the plague.Leave a comment:
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Re: [emission only] vacuum tube tester safety
this set must have been missing its isolation hardware.
not unusual for these parts to have degraded in the last 70+ years and replaced with metal parts by someone who did not understand why the chassis mounts were made of "cheap" plastic or rubber.
or used a metal knob in place of a plastic one.
aa5 sets require a bit of caution when testing/repairing them....Leave a comment:
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Re: Cordless Soldering Iron - recommendations?
btw a iso-tip with a high drain 21700 li-ion and a tp4056 board works great.
i also replace bulb with a white led and resistor in the bulb base.
the yellow package high efficiency tips work best.
the standard tips overheat and glow if you hold it down.
so you cycle it.
18650,20700,ect work too. but must be at least 15a rated.
tesla model 3 cells do ok in the one i did recently.
they can be a trick to connect to the recessed aluminum + contact but the right flux and a good iron will allow you...Leave a comment:
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