Products > Test Equipment
Keysight (lack of) calibration & other services
wraper:
--- Quote from: nctnico on August 08, 2021, 06:38:17 pm ---Not for someone who specialises in such repairs; these people have collections of firmware at their disposal which they gathered from previous repairs en FUBAR equipment procured from various sources.
--- End quote ---
As if. Sure they have some firmware dumps. But not even close to what is needed and not even remotely everything can be dumped from equipment. Even if you have another piece of equipment, good luck reading some read protected MCU.
bdunham7:
--- Quote from: nctnico on August 08, 2021, 06:38:17 pm ---Not for someone who specialises in such repairs....And I also second what HighVoltage wrote: most of the repairs are power supply related.
--- End quote ---
Specialization helps, since you can choose to specialize in things for which you have the firmware, parts, knowledge, etc. But in the wider world, many things end up being BER or just plain not repairable at any price because of these issues. And while I'll happily repair PSUs as needed, there's a lot of stuff that I see that goes way beyond that. Of course if you only count the repairs and not the broken units that didn't get fixed, perhaps the PSU percentage goes up, especially for the less determined.
nctnico:
--- Quote from: wraper on August 08, 2021, 07:00:09 pm ---
--- Quote from: nctnico on August 08, 2021, 06:38:17 pm ---Not for someone who specialises in such repairs; these people have collections of firmware at their disposal which they gathered from previous repairs en FUBAR equipment procured from various sources.
--- End quote ---
As if. Sure they have some firmware dumps. But not even close to what is needed and not even remotely everything can be dumped from equipment. Even if you have another piece of equipment, good luck reading some read protected MCU.
--- End quote ---
That is grasping at straws. The reality is that you don't need that data because MCUs don't fail (or better put: MCUs have such an insignificant failure rate that it is easy enough to procure a replacement board). Hard drives & SSDs OTOH do fail regulary but are easy to clone.
wraper:
--- Quote from: nctnico on August 08, 2021, 07:41:27 pm ---
--- Quote from: wraper on August 08, 2021, 07:00:09 pm ---
--- Quote from: nctnico on August 08, 2021, 06:38:17 pm ---Not for someone who specialises in such repairs; these people have collections of firmware at their disposal which they gathered from previous repairs en FUBAR equipment procured from various sources.
--- End quote ---
As if. Sure they have some firmware dumps. But not even close to what is needed and not even remotely everything can be dumped from equipment. Even if you have another piece of equipment, good luck reading some read protected MCU.
--- End quote ---
That is grasping at straws. The reality is that you don't need that data because MCUs don't fail (or better put: MCUs have such an insignificant failure rate that it is easy enough to procure a replacement board). Hard drives & SSDs OTOH do fail regulary but are easy to clone.
--- End quote ---
:palm: |O Do you ever repair any equipment? What you just wrote is nonsense, MCU and other components which contain firmware fail often enough to be a big problem for independent repairs. Or firmware/config data just gets corrupted without any component failure.
nctnico:
If you have read what I have been posting over the years then you'd know I have a whole bunch of repairs under my belt. The majority of those without access to schematics.
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