Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old February 22nd 21, 07:33 AM posted to sci.electronics.repair
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Default Fluke 199C Repair Notes

Just some pointers to anyone having trouble with this handheld LCD
scope. I've seen other reports on the web about this model not powering
up but no answers. I had one that started to power up intermittenly and
then eventually refused to power up at all. It would just make a short
chirp beep sometimes when pressing the power button, sometime no beep at
all. Long story short, you can get the older service manual here which
includes full schematics and board layout.

https://archive.org/details/FLUKE_19...ice/page/n201/
mode/2up

They have lots of troubleshooting steps for no power up and so forth, but
in my case it was a problem with the soldering of the "D-ASIC" chip
(D3500). I think this is a BGA type or something very similar.

I fixed it by using the old hot air gun trick. I use a method of putting
a tiny piece of 63/37 solder on top of the chip and then aim the gun
about 6" away on med-high heat. As soon as the little piece of solder
starts getting molten, I quickly move the gun away and apply force down
on the chip with the handle of a screwdriver (in this case). I repeated
this a few times, then let it cool off and voila! Working perfectly
again!


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