| Products > Test Equipment |
| Fluke 177 failed and need support to repair |
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| Fungus:
--- Quote from: BeBuLamar on December 27, 2021, 06:53:23 pm ---However, by all mean contact them and see what they say. It doesn't hurt. --- End quote --- There's no need to mention that it's second hand or what happened to it. Model number, serial number, symptoms. If they say "no" then it only cost you an email or phone call. Be sure to let us know how it went. |
| Chinhdc:
Yesterday, the SGP Fluke Center contacted me and quote ~USD200 not include carrier. |
| bdunham7:
Without a schematic this might be tough, but I suppose we could do a bit of guessing that it may be similar to other meters that we have schematics for, like the 87V. If it uses the same floating ground configuration where the input ground is 2.5V above the battery negative, shorting the COM lead to the battery negative might blow the 2.5V regulator. The controller would still have it's 5 volts, but anything relying on that ground would not work. The 87V uses an LT1790-2.5, which according to the datasheet is a 6-lead SOT-23 package and may have a marking of "LTPZ". So look for that. Beyond that, you probably need to try and identify as many of the smaller ICs as possible so as to try and reverse engineer it a bit to see where the damage may have been done. |
| dophuc:
In Vietnam, I know there is a company called EMIN that distributes electronic equipment. In addition, they also have calibration and repair services for many types of electronic equipment including Fluke. I think you should try contacting them in this case. https://emin.vn/sua-chua-dong-ho-van-nang-fluke-91342/pr.html |
| AVGresponding:
--- Quote from: bdunham7 on December 28, 2021, 01:55:25 am ---Without a schematic this might be tough, but I suppose we could do a bit of guessing that it may be similar to other meters that we have schematics for, like the 87V. If it uses the same floating ground configuration where the input ground is 2.5V above the battery negative, shorting the COM lead to the battery negative might blow the 2.5V regulator. The controller would still have it's 5 volts, but anything relying on that ground would not work. The 87V uses an LT1790-2.5, which according to the datasheet is a 6-lead SOT-23 package and may have a marking of "LTPZ". So look for that. Beyond that, you probably need to try and identify as many of the smaller ICs as possible so as to try and reverse engineer it a bit to see where the damage may have been done. --- End quote --- Definitely worth a look, as both the microprocessor and front end ASIC need that -2.5V to function correctly, at least on the 87V, and power rails are easy to check. |
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