Author Topic: Agilent Keysight 3034a X-Series Oscilloscope Repair  (Read 3097 times)

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Offline salvagedcircuitryTopic starter

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Agilent Keysight 3034a X-Series Oscilloscope Repair
« on: March 17, 2020, 08:39:02 pm »
Hey Guys! I made a repair video about fixing a faulty Agilent / Keysight 2000/3000-x series power supply

Massive thanks to my fellow eevblog members. This thread inspired me to create this video, as it seems that the 2000/3000x oscilloscope power supplies have a few different failure modes.
Relevant EEVblog forum thread:

List of replacement parts:

Datasheet for look-a-like lineage branded power supply. CCH125 series:

Genuine Keysight PSU repair part: 0950-5277

Keysight InfiniiVision 3000 X-Series Oscilloscope Firmware (latest)

Original mosfet:

Replacement mosfet:

Two pin Diode package near mosfet:

Current mode controller:

Replacement MOV:

Replacement NTC Varistor:

Replacement Fuse:

Replacement 1w 22k resistor under main filter capacitor:

Possible power supply retrofit:

Tall cap I selected:

Dimensionally compatibile cap:

Let me know what you think!
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