Author Topic: Rohde & Schwarz NGE100 Power Supply  (Read 882 times)

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Offline ScutariusTopic starter

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Rohde & Schwarz NGE100 Power Supply
« on: August 24, 2022, 02:40:35 pm »
Hi,

I have a power supply with both channels blew up, Dave's teardown has a good capture of the area
https://youtu.be/Z6F7Pwi6WLI?t=1174

What it looks to be the current sense resistor is totally damaged, does anyone here can confirm that it is a R050 metal foil resistor?
I can barely read the marks

R050  F
L4344

Any suggestions on the tolerance, 0.1%? Is the green material always an indication of a metal foil resistor?

Thanks,
 

Offline thm_w

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Re: Rohde & Schwarz NGE100 Power Supply
« Reply #1 on: August 25, 2022, 11:27:52 pm »
R050 F
H204R  (unsure about the 4)

Can you measure the package size to help narrow it down.

Metal foil.
F might be 1%: https://www.yageo.com/upload/media/product/productsearch/datasheet/rchip/PYu-PE_521_RoHS_L_10.pdf
« Last Edit: August 25, 2022, 11:30:23 pm by thm_w »
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Offline ScutariusTopic starter

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Re: Rohde & Schwarz NGE100 Power Supply
« Reply #2 on: August 26, 2022, 01:36:18 pm »
Hi thanks!
it is ~3.15x6.3 mm
 

Offline thm_w

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Re: Rohde & Schwarz NGE100 Power Supply
« Reply #3 on: August 26, 2022, 10:01:56 pm »
Thats 2512 package (0.25"x0.12").

If you can't find the exact part, there is a ohmite 0.5% 50ppm for $1.50 on digikey (PCS2512DR0500ET).
Would expect thats good enough.

Next question is how to recalibrate the current readings.
« Last Edit: August 26, 2022, 10:03:52 pm by thm_w »
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Offline ScutariusTopic starter

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Re: Rohde & Schwarz NGE100 Power Supply
« Reply #4 on: August 29, 2022, 01:55:18 pm »
Thanks
and assuming this no other damaged component... :popcorn:
 


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