Agilent DSO3102A - No Boot -

Thread Starter

Frank_SFL

Joined May 12, 2021
17
Hello,
I have an Agilent DSO3102A. When you press the power button, the backlight for the screen lights, the fan spins, the buttons light up, but that is it.
I am leaning toward NAND corruption, but wanted to verify the voltages coming from the Power Supply to the main PCB connector.
I tested the voltages with the main PCB still connected, and these are the voltages I saw when I probed the pins (order is from front of scope to back of scope).

Pin 1: +5v
Pin 2: +5v
Pin 3: GND
Pin 4: +17.69v
Pin 5: GND
Pin 6: +7.95v
Pin 7: -7.97v
Pin 8: GND
Pin 9: -16.85v
Pin 10: GND
Pin 11: +30.78v
Pin 12: +155mv

If you have any thoughts or suggestions, or better yet if you have one that you know what the voltages should be, I would greatly appreciate it!
Thank you in advance!!
 

Thread Starter

Frank_SFL

Joined May 12, 2021
17
Thank you for the link.
I actually contacted Keysight, and they told me that the scope is obsolete and they no longer accept them for repair. They also said they no longer have parts for them. They were very nice, but essentially they said I am on my own.

I finally pulled the power supply board, and noticed that someone had done something to it. There were black dots from a Sharpie where the caps are soldered and flux residue on the back of the board. So....it may be the power supply after all.

Thanks again!!!
 
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