Comments on: Servicing Sunma YX-3600Treb Analogue Multimeter

By: Vinay

Vinay — Thu, 13 Sep 2018 11:22:47 +0000

Brother, I'm from India. I have 2 burnt resistors,The last one from the 3 resistor below the buzzer(right to the 9802) & On the left side 2nd resistor from bottom(above R960). Can you please give me the values.
Please..

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By: Vinay

Vinay — Thu, 13 Sep 2018 11:05:11 +0000

In reply to Parasuraman S.

Sir,I'm from Kerala.I have the same multimeter. Accidently I burned 2 SMD resistor. The last one from the 3 resistors below the buzzer(next to the 9802 resistor). And the 2nd last resistor from the 9 resistor on the left side(The resistor above the last resistor R960). I tried to find the value from the image but it is not clear.So if you give me the values I can fix my meter.Waiting For Your Reply..

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By: Parasuraman S

Parasuraman S — Sun, 15 Oct 2017 23:13:31 +0000

In reply to Dr Tejas Gaydhankar.

If you save the image and zoom it and see, it is clear. Anyhow, the next resistor value is 100 Ohms (101), the next one to that is 1.1K (112), and the next one is 16.9K (1692). Hope this helps!

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By: Albert

Albert — Sat, 14 Oct 2017 02:16:11 +0000

In reply to Robert Calk.

As I already expected is the DY294 also perfectly able to test any DIAC.
I've just tested this with a DB3 DIAC that according to this datasheet has an breakthrough voltage of 28V.

http://www.st.com/content/ccc/resource/technical/document/datasheet/fb/af/b0/56/99/1a/42/b4/CD00002277.pdf/files/CD00002277.pdf/jcr:content/translations/en.CD00002277.pdf

And that is exactly what my DY294 showed on its display when tested in the capacitor voltage clamps on maximum voltage scale. And in both directions!

Although it may not explicitly been written in the DY294 manual but it supports testing DIACs also just fine.
So no need to use any old analogue meter!

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By: Dr Tejas Gaydhankar

Dr Tejas Gaydhankar — Thu, 12 Oct 2017 05:17:50 +0000

Indeed a nice article... another one which ...I liked was about zeb ATX smps...Chinese tricking on resistor values.
I have a same multi meter...but the resistor besides 10 ohms is burnt.. can't see the value in your pic. if u know the value.. please help.

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By: Parasuraman S

Parasuraman S — Wed, 04 Oct 2017 23:54:18 +0000

In reply to Amir Mukhtar Ashrafi.

That is not wrong, dear! 100 marking on SMD resistor means, 10 with no zero to be added. The third digit indicates the number of zeroes to be added. For example, 101 indicates 100 Ohms. 102 indicates 1000 Ohms (1K) So on..... Kindly download and keep SMD codes from the open website and study. All the best!

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By: Amir Mukhtar Ashrafi

Amir Mukhtar Ashrafi — Wed, 04 Oct 2017 05:40:38 +0000

Thank you Mr. Parasuraman Subramanian
Also, More thanks to Chineese conspiracy tricks for Resistor's wrong Showing Value like 100 = 10 ohms.

Thank you Again
Keep sharing to Learn more with you.

Amir Mukhtar Ashrafi
A student of Electronics
Karachi .PK

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By: Parasuraman

Parasuraman — Sun, 01 Oct 2017 02:31:42 +0000

In reply to Ding Villanueva.

Sorry, dear, I do not have. Perhaps you can trace it from the photos given in article?

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By: Ding Villanueva

Ding Villanueva — Fri, 29 Sep 2017 15:41:15 +0000

Hi Mr Parasuraman,

Greetings from the Philippines

I also have two Sunma Analogue MM that needs some fixing. However, I can't find its schematic diagram so that I can replaced a burned out resistors.
I wonder if you have a copy of the schematic for the same Sunma that you just repaied recently.

Can you please send me a copy if I am not asking too much.

Thank you and more power.

Ding

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By: Robert Calk

Robert Calk — Thu, 28 Sep 2017 17:05:19 +0000

In reply to Albert.

Yeah, the BK Precision 114A like mine are not very cheap since they are no longer made. But there are others that are pretty inexpensive and some you can get in kit form and put together yourself. I have one that was one of the first kits I put together when I first started learning electronics and soldering. I think it is a Tenma.
There is a pretty good article on analog meters in the new October issue of Nuts and Volts magazine. For those in other countries you can get the magazine digitally pretty cheap.

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