Comments on: Repairing Your Own Digital Capacitance Meter

By: Robert

Robert — Sun, 04 Feb 2024 16:38:10 +0000

Hi Jestine
I have that capacitor tester JY6013 or M6013 you reviewed.
https://jestineyong.com/jy6013-auto-range-digital-capacitor-capacitance-tester/
I did the fatal error of testing a capacitor not unchaged, was a 400V 150uF that had been unplugged and unused for almost 1 month but had no resitance or 220v to discharge it

The meter still works and reads but has 2 faults
1.- LCD LEDs only works for a fraction of a second when switching device on. After that they no longet light up. One has to switch off and let device rest say for 1 minute. On switching on again only lights up for a fraction of a second.

2.- Incorrect capacitance values displayed. Say a 16V 2200 uF capacitor (new) reads only 10% capacitance and then goes down gradually to 0.
But if I switch device off with capacitor connected and switch it on again: then capacitance shown in
The tester is almost 50%
Don't know where to check, if exchanging the big capacitor inside 16V 2200uF or exchange the 1st transistor after the positive probe.
Best regards and thank you

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By: Jestine Yong

Jestine Yong — Thu, 29 Sep 2022 11:51:40 +0000

In reply to Hisham.

Hi Hisham,

You just need to trace backward from the positive probe to all the corresponding components and measure it hopefully you can find those bad components.

Jestine

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By: Hisham

Hisham — Tue, 27 Sep 2022 10:09:24 +0000

I measured 12 v voltage while the probes were at the capacitance meter sockets
The capacitance meter is working but it gives wrong readings. It gives higher values
What could it be the problem ?

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By: Nalinda

Nalinda — Tue, 26 Apr 2022 10:13:12 +0000

Hello sir..
I accidentally contacted charged Capasitor to uni-t600 model tester. On Capasitor range show "1" infinity value. Positive path traced to k30 marked 3pin device (jfet?) and Gz503 (8pin smd chip) looks good. Ohms range fine. Pls help. Thank you.

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By: Jestine Yong

Jestine Yong — Tue, 10 Nov 2020 12:17:02 +0000

In reply to Sina.

Hi Sina,

Sorry I do not have this meter with me. I suggest that you trace from the red probe to the inside of the circuit and check all the corresponding components.

Jestine

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By: Sina

Sina — Sun, 08 Nov 2020 09:34:41 +0000

In reply to admin.

Hi. The mastech my6013a dosnt work. It's on & display is on but always show number "1" i think i made a mistake & i didnt discharge the capacitor before conect to meter. Please help me. The fuse & low ohm resistor after fuse are ok.

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By: Jestine Yong

Jestine Yong — Fri, 05 Jun 2020 06:24:00 +0000

In reply to Vigneswaran g.

Hi Vigneswaran,

If only the capacitance range that can't be used, probably there is a small SMD fuse or low ohm resistor blown in the capacitor circuit.

Jestine

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By: Vigneswaran g

Vigneswaran g — Thu, 04 Jun 2020 15:40:48 +0000

I have v8222h multimeter I measured charged capacitor. Now it's not showing capacitance value anymore can u tell me tip to repair it..

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By: Jestine Yong

Jestine Yong — Thu, 27 Feb 2020 06:57:46 +0000

In reply to Earle Brown.

Hi Earle,

It is difficult to test without having the schematic and the same parts. Internet has very limited information about repairing meter LCD display.

Jestine

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By: Earle Brown

Earle Brown — Tue, 25 Feb 2020 15:27:12 +0000

In reply to Jestine Yong.

Hi Jestine,
Is there any way to test the LCD display( with the zebra connector) to know if it is working.
Thanks

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