Author Topic: Resistor of an agilent oscilloscope DSO-X 2012A PS,doubt!  (Read 9274 times)

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Offline zgr

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Re: Resistor of an agilent oscilloscope DSO-X 2012A PS,doubt!
« Reply #25 on: September 07, 2017, 08:04:00 am »
Another image.

Does the scope provide power to USB host device when it starts to boot?
In my case i think there could be  some problem with some voltage regulator or step-down converter chip. May be power problem for graphics chip.

My scope is completely dead! I need to fix the P.S at first to know how it will reacts

Hi SAUL BRITTO

I have a same problem with you. Q1 transistor and 2K resistor are dead. Before i will change them, your experience is very important for me. Did you have a chance fix the P.S. and try to open oscilloscope ? Does change the Q1 and 2K resistor enough for fixing?




 

Offline Jurkstas

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Re: Resistor of an agilent oscilloscope DSO-X 2012A PS,doubt!
« Reply #26 on: October 07, 2017, 06:00:36 pm »
My scope has same symptoms as this one:


The power supply for my scope shows 13 VDC so it is ok, i think the problem could be with Windows CE boot. Who had the idea to put windows on the oscilloscope :D

I think you can fix your scope easy by installing open frame 13vdc 200-250W power supply from Mean Well :)

Which value you need to know?

Hey guy, did you look the screen voltage? maybe a LCD problem...
Hi, I replied to this topic with a very familiar symptom. My scope lights one more LED before halting. LCD voltage is down, because it is disabled. I assume it is only enabled later in boot process. Have you found anything more about this issue?
 


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