UT70a digital multimeter range selector slide contact positions. - Page 1
Forum section: electronics / testgear

author: Sam01
author_rank: Newbie
timestamp: January 29, 2014, 10:42:17 am
content: Dear All,I have a UT70A digital MM of which has broken slide contact of the range selector switch. I found some suitable slide contact but not sure to which position of them to be inserted. Please help me.Picture of the selector switch and the MM main PCB are attached.A great help.

author: GEuser
author_rank: Frequent Contributor
timestamp: January 29, 2014, 11:25:02 am
content: If look at 120824 picture , take look of block of pcb tracks on upper righthand section , going down to bottom sees little pcb tracks ,,Since slide contacts are x2 in other pictures each , it seems the very lower ones are 3?But anyway , 2 pcb tracks each for contact , starting from top 2 , then 2 then 2 etcetera , then position switch above pcb and check and look from the side to follow suit , only trouble is lower 3?(maybe) .

author: Sam01
author_rank: Newbie
timestamp: January 29, 2014, 11:54:24 am
content: Thank you GEuser. Yes you are correct . The inner most 3 PCB are to be connected together.My doubt is that can slide switch in the selector knob be in the opposite side aligning the same PCB track. The attached picture would give what I am trying to say.Again thank you for the support.

author: GEuser
author_rank: Frequent Contributor
timestamp: January 29, 2014, 12:25:38 pm
content: It looks more complicated than at first thoughthttp://www.elektroda.pl/rtvforum/topic1359217.htmlcan you read this language ? maybe do a translate .http://www.elektroda.pl/rtvforum/topic330543.htmlAbove was by a image search , cheers ...

author: Sam01
author_rank: Newbie
timestamp: January 30, 2014, 07:28:06 am
content: Dear GEuser,Many thanks. The link you gave me gave complete description of what I was searching for. Again LOTs of thanks to you. I may attached the pictures of the same that would help others as well.

author: GEuser
author_rank: Frequent Contributor
timestamp: January 30, 2014, 09:02:27 am
content: No problem Sam01 I am happy you have it all sorted outI posted the links as your multimeter was out of my depth as I did not realize that the selector had so much travel around until I actually looked the MM up , I really was going by the 180 degree turn like the one I had just serviced awhile back , all good , cheers ....https://www.eevblog.com/forum/testgear/vc99-multimeter-(ooops-forgot-take-pictures)/msg369778/#msg369778

author: Sam01
author_rank: Newbie
timestamp: January 30, 2014, 11:20:27 am
content: Hi GEuser,I see you are doing wonderful jobs for others.Keep it up. People from all over the world , like us , appreciate your great job.Cheers.

author: GEuser
author_rank: Frequent Contributor
timestamp: February 01, 2014, 06:04:37 am
content: Quote from: Sam01 on January 30, 2014, 11:20:27 amHa Ha , hi Sam01 , you are much too generous with the idea of a job , to quite a few its a hobby as in the abridged Earth's Dictionary Definitions >"Hobby" (a term on earth the planet) > Is What one does when there is nothing better to do .Now all we have to figure out is the changing plastic white and plastic black/grey in the photo's , cheers ...

author: Sam01
author_rank: Newbie
timestamp: February 03, 2014, 06:38:02 am
content: Hi Geuser,What ever it is called job or hobby, you are doing a wonderful thing.By the way, do you have any idea of getting this small slider contact of multimeer.It seems that i missed 2. Alternatively any idea to make it myself. What material and how to do it ?Thank you in advaced.Cheers.

author: GEuser
author_rank: Frequent Contributor
timestamp: February 04, 2014, 11:47:39 am
content: Hi Sam01 , no I have no idea on where to get little bendy contacts , they be brass shim like material I think as it solders very good , maybe someone reading can let you know but I gather no-one does as yet or it would have been suggested by now , by-eee and good luck.

author: Sam01
author_rank: Newbie
timestamp: February 05, 2014, 04:37:05 am
content: Hi Geuser,Thnak you for the reply. I think so. It seesm to be brass like material. I will find a way to make this tuny strips.Cheers.