Olympus BH-2 Voltage Control

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sombre
Posts: 11
Joined: Mon Jul 30, 2018 8:14 am

Olympus BH-2 Voltage Control

#1 Post by sombre » Sun Aug 05, 2018 11:24 am

I have an Olympus BH-2 on which the sliding voltage control is not working.
When the power is switched on and with the sliding control set to it's minimum, the power lights show two of the twelve led's lit up. But sliding the control forward fails to increase the voltage and light intensity.
As i am new to microscopes, and not that great where technical problems are concerned, i would greatly appreciate any advice and infomation as to what might be the cause of my problem and how to rectify it.

Many Thanks, in anticipation.

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mrsonchus
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Re: Olympus BH-2 Voltage Control

#2 Post by mrsonchus » Sun Aug 05, 2018 2:17 pm

The first thing I would look at is the condition of the 'slider' and it's contacts.
Chances are that it's simply a little dirty and needs a clean.

John B.
John B

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lorez
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Re: Olympus BH-2 Voltage Control

#3 Post by lorez » Sun Aug 05, 2018 6:13 pm

If cleaning the slider does not work then it is the circuit board with the LEDs. At one time there was a secondary source, but I've not seen anything for some time. I now convert the BH2 to LED using a handy kit I have.

lorez

sombre
Posts: 11
Joined: Mon Jul 30, 2018 8:14 am

Re: Olympus BH-2 Voltage Control

#4 Post by sombre » Mon Aug 06, 2018 10:31 am

Many thanks John B. Got myself a can of contact cleaner and did as you suggested, now working brilliantly. Cleaned everything else while i had it apart and now with a bit of luck no further problems.
Again many thanks.

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mrsonchus
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Re: Olympus BH-2 Voltage Control

#5 Post by mrsonchus » Mon Aug 06, 2018 10:51 am

That's great - it'd probably just been standing a while - have fun!

John B.
John B

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