EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: ghostbox on February 25, 2016, 06:49:07 pm

Title: HAMEG 103-2 Problem
Post by: ghostbox on February 25, 2016, 06:49:07 pm

Hey guys,

I'm fairly new to electronics, so I bought used Hameg 103-2 as my first oscilloscope, and this is what happens when I change Volts/Division (video).

Also, when I set to 20V it smells weird, not like burning, but something similar.  :-//

https://www.youtube.com/watch?v=0s6DTDEUJ2I (https://www.youtube.com/watch?v=0s6DTDEUJ2I)

Does anyone have any idea what could be the problem?

Any help would be much appreciated.

Thanks in advance!

Title: Re: HAMEG 103-2 Problem
Post by: eeadata on February 25, 2016, 07:25:50 pm

it seems there is an dirty switch contact. Take it apart and clean contacts. Lube shafts .

BTW service it.

Title: Re: HAMEG 103-2 Problem
Post by: tautech on February 26, 2016, 02:35:27 pm

Quote from: eeadata on February 25, 2016, 07:25:50 pm

it seems there is an dirty switch contact. Take it apart and clean contacts. Lube shafts .

BTW service it.

+1
Products like Deoxit are normally used to clean the gold contacts in the V/Div selector.
Sometimes just "exercise" of the selectors will clean up the contacts.

Service manual
http://elektrotanya.com/hameg_hm103_oscilloscope_um.pdf/download.html (http://elektrotanya.com/hameg_hm103_oscilloscope_um.pdf/download.html)
Wait until the "Get Manual" link appears, then click to download.