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Amazon Do Multimeters Now

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aeberbach:
I have one of these but the LCD is not quite right:



Figured I would open it up one day and reseat a cable and all would be well but it is not a reseatable cable:



The nearest pair of contacts are blobbed together but I don't think it could be that, could it?



Anyone know what the LCD is? No markings. I might replace it if it is cheap.

KungFuJosh:

--- Quote from: aeberbach on May 09, 2023, 08:33:40 pm ---The nearest pair of contacts are blobbed together but I don't think it could be that, could it?

--- End quote ---

Check if the blob has continuity to ground; that might be on purpose. Or a big sloppy mistake. 🤷

mwb1100:
Dave did a video a couple years ago about why pins might be intentionally shorted (24 minute video!) .  Might help you determine if that's the case here.

JonnhyK:

--- Quote from: Kosmic on April 05, 2023, 04:24:30 pm ---Talking about the Amazon 90DM890 (CEM DT-989), if someone is looking for the password for the calibration menu and calibration procedures, poke me. I was able to get my hands on everything.

--- End quote ---

MODEL AMAZON COMMERCIAL 90DM890
BOARD DT-989-V1.5-A1-M4
FIRMWARE 1.10
S/N 220111833

CALIBRATION PASSWORD FOUND:

ONE ZERO ZERO ZERO

1 0 0 0

please kindly quote my reply adding if ur calibration password match or if u found different pwd

PLEASE add your board version - fw version - rebrand model or original CEM DT-989

skander36:
Thank you!
Password works.
FW. ver. 1.10
Board is not clear - DTD989 V1.5?
Amazon Comercial

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