EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: salvagedcircuitry on March 17, 2020, 08:39:02 pm
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Hey Guys! I made a repair video about fixing a faulty Agilent / Keysight 2000a/3000a x-series power supply
https://www.youtube.com/watch?v=fd1uQpH9Paw
Massive thanks to my fellow eevblog members. This thread inspired me to create this video, as it seems that the 2000a/3000a oscilloscope power supplies have a few different failure modes.
Relevant EEVblog forum thread:
https://www.eevblog.com/forum/repair/dso-x-3024a-power-supply-defect/ (https://www.eevblog.com/forum/repair/dso-x-3024a-power-supply-defect/)
List of replacement parts:
Datasheet for look-a-like lineage branded power supply. CCH125 series:
http://apps.geindustrial.com/publibrary/checkout/CCH125?TNR=Data%20Sheets%7CCCH125%7CPDF&filename=CCH125.pdf (http://apps.geindustrial.com/publibrary/checkout/CCH125?TNR=Data%20Sheets%7CCCH125%7CPDF&filename=CCH125.pdf)
Genuine Keysight PSU repair part: 0950-5277
https://www.keysight.com/my/partDetail/0950-5277 (https://www.keysight.com/my/partDetail/0950-5277)
Keysight InfiniiVision 3000 X-Series Oscilloscope Firmware (latest)
https://www.keysight.com/main/software.jspx?cc=US&lc=eng&ckey=2014548&nid=-32976.970765.02&id=2014548 (https://www.keysight.com/main/software.jspx?cc=US&lc=eng&ckey=2014548&nid=-32976.970765.02&id=2014548)
Original mosfet:
https://www.digikey.com/product-detail/en/stmicroelectronics/STP12NM50/497-2666-5-ND/603691 (https://www.digikey.com/product-detail/en/stmicroelectronics/STP12NM50/497-2666-5-ND/603691)
Replacement mosfet:
https://www.digikey.com/product-detail/en/ixys/IXTP450P2/IXTP450P2-ND/2328313 (https://www.digikey.com/product-detail/en/ixys/IXTP450P2/IXTP450P2-ND/2328313)
Two pin Diode package near mosfet:
https://www.digikey.com/product-detail/en/on-semiconductor/MUR860G/MUR860GOS-ND/919926 (https://www.digikey.com/product-detail/en/on-semiconductor/MUR860G/MUR860GOS-ND/919926)
Current mode controller:
https://www.digikey.com/product-detail/en/on-semiconductor/UC3842BVD1R2G/UC3842BVD1R2GOSCT-ND/5802572 (https://www.digikey.com/product-detail/en/on-semiconductor/UC3842BVD1R2G/UC3842BVD1R2GOSCT-ND/5802572)
Replacement MOV:
https://www.arrow.com/en/products/v300la20ap/littelfuse (https://www.arrow.com/en/products/v300la20ap/littelfuse)
Replacement NTC Varistor:
https://www.arrow.com/en/products/b57237s709m/epcos-tdk (https://www.arrow.com/en/products/b57237s709m/epcos-tdk)
Replacement Fuse:
https://www.digikey.com/product-detail/en/bel-fuse-inc/MRT-6-3AMMO/507-1119-1-ND/4794478 (https://www.digikey.com/product-detail/en/bel-fuse-inc/MRT-6-3AMMO/507-1119-1-ND/4794478)
Replacement 1w 22k resistor under main filter capacitor:
https://www.arrow.com/en/products/erj-1tyj223u/panasonic (https://www.arrow.com/en/products/erj-1tyj223u/panasonic)
Power supply retrofits:
https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPS-300-12/7706051 (https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPS-300-12/7706051)
https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPS-400-12/7706061 (https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPS-400-12/7706061)
Will need ps_on inverted:
https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPSG-160-12/7706116 (https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPSG-160-12/7706116)
https://www.digikey.com/en/products/detail/murata-power-solutions-inc/PQC250-12/6873845 (https://www.digikey.com/en/products/detail/murata-power-solutions-inc/PQC250-12/6873845)
Tall cap I selected:
https://www.digikey.com/products/en?keywords=ucy2w101mhd (https://www.digikey.com/products/en?keywords=ucy2w101mhd)
Dimensionally compatibile cap:
https://www.digikey.com/product-detail/en/rubycon/450VXH100MEFCSN22X25/1189-2028-ND/3564971 (https://www.digikey.com/product-detail/en/rubycon/450VXH100MEFCSN22X25/1189-2028-ND/3564971)
Let me know what you think!
https://salvagedcircuitry.com/ (https://salvagedcircuitry.com/)