UT70a digital multimeter range selector slide contact positions.

[Sam01]

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.

[GEuser]

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) .

[Sam01]

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.

[GEuser]

It looks more complicated than at first thought

http://www.elektroda.pl/rtvforum/topic1359217.html     can you read this language ? maybe do a translate .

http://www.elektroda.pl/rtvforum/topic330543.html

Above was by a image search , cheers ...

[Sam01]

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.

[GEuser]

No problem Sam01 I am happy you have it all sorted out 

I 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

[Sam01]

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.

[GEuser]

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.

Ha 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 ...

[Sam01]

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.
 

[GEuser]

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 .

[Sam01]

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.