Multimeter Repair | Electronics Repair And Technology News

Beware Of Using Auto Detect Auto Range Multimeter – Case Of AHUJA Portable PA SYSTEM NBA-30WL

Jestine Yong — Sat, 21 Mar 2026 07:16:31 +0000

This Ahuja Portable PA System had come to me in May, 2025 for a complaint of ‘dead’, about which I have already submitted a report which is in queue. The re-visit was in August, 2025 with the complaint that battery backup was not good. I found the battery to be weak and needed replacement. As […]

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SIGMA SG888L Multimeter Repair

Jestine Yong — Sat, 03 Aug 2024 12:18:35 +0000

I was working on some repair & noticed my Multimeter is not showing one line in first digit segment. So I kept the repair work a side to first tackle this fault. I found very rarely display or circuit problem, 95% this problem is arriving because of poor contact between […]

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Green VC200 DMM Lithium Upgrade

Jestine Yong — Fri, 20 Oct 2023 23:20:23 +0000

For a very long time I was planning to fix my not correctly working Conrad Green VC 200 DMM. Here you can find some information on the specifications of this older DMM: https://www.radiomuseum.org/r/conrad_green_multimeter_vc200.html This green DMM is supposed to charge an internal 1.0 Farad max 5.5V Supercap with its […]

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Multimeter LCD Screen Black Oval Patch Repaired

Jestine Yong — Thu, 17 Nov 2022 08:42:11 +0000

Once I borrowed the Multimeter from one of my techie friend’s while I was on casual meet to one of my relative who is staying nearby this guy…….my relative’s some power adaptor is not working so for confirm the same I arranged this meter for testing. I saw the meter’s LCD screen is damaged & […]

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Multimeter Repaired For Unstable Reading Problem

Jestine Yong — Fri, 08 Apr 2022 23:51:02 +0000

Meter on my work bench start behaving abnormally, Digits keeps changing on the display. I thought it is time for new Multimeter because this problem is may be because of the main IC which is not worth to replace. In spite of doubt I opened the meter for inspection. On visual inspection component side everything […]

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UNI-T Digital Multimeter Faulty From Time Of Purchase

Jestine Yong — Fri, 28 Jan 2022 12:47:34 +0000

I purchased this uni-t metre model: UT39A+ on January 2020 brand new from a local shop in the city. I did bought it because of its high capacitance mode(Mega/farad) compare to my other meters (suoer,dt9205a) brands that have limited measurement (200 microfarad). So about a month […]

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About The Impedance Of Multimeters

Jestine Yong — Fri, 22 Oct 2021 22:47:54 +0000

Ever wondered why when you measure the voltage of a particular circuit with your digital and analogue meter, the result that you got were different? The reason for it usually is due to the impedance of the meter you are using. It is also depends on what kind of circuit you are measuring. So what […]

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Suoer Digital Meter That Does Not Easily Power On

Jestine Yong — Thu, 23 Sep 2021 08:04:03 +0000

It is my digital meter that was purchased about a year ago, that refused to power on, I guess the power switch is faulty. So I decided to repair it. Open it up and this is the PCB board. I couldn’t get exact size of switch, but I got a slightly bigger one which couldn’t […]

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Non Repairable Of UNITY 830D Multimeter

Jestine Yong — Fri, 10 Sep 2021 07:18:32 +0000

I was at a bike service center for routine servicing of my Bike. In conversation about new technology trend of bike. Suddenly mechanic remembered that he has one multimeter which was damaged by one of his helper & request me to check the multimeter which is not working properly. I took multimeter on my hand […]

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A Multi Meter With The Issue Of Bad Display Repaired

Jestine Yong — Wed, 30 Sep 2020 12:32:02 +0000

One of my regular customers who is an AC technician called me late at night to inform me about his multi meter being dropped and because of that, the display on the screen was messed up. He brought it to my shop the next day for check up […]

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