[QUOTE=enricocopyline;707003]zeroing the meters for no reason. just for information.
There is always a reason for zeroing counters.
This knowledge is completely useless for a field service technician, servicing and maintaining the machines from commissioning to disposal as a result of normal wear and tear.
Moreover, I can't remember (maybe due to memory gaps) if I ever need "forbidden knowledge" to solve even non-standard issues - I mean, even non-standard issues could be solved with standard tools and knowledge.
Of course, there are some issues (like C-4801), that you hope to solve with "forbidden knowledge", but no, you can't repair them this way...
Most of really non-standard issues you can meet during rebuilding crashed machines - replacing construction parts, wiring, boards (with boards from another machine, not new one), adjustment of skewed scanner or PH unit, and so on.
But most of them comes from your own lack of knowledge, ignorance, or intentional skipping necessary steps - in these cases (this rather trivial and basic knowledge, from my point of view) will not help you to pretend to be a better technician.
If you really want this knowledge to fullfill your own curiosity, you must devote your free time (thousands of hours) to studying documentation, patents, electronics, building operating systems...
Then, one day you will be able to assess whether it was worth sacrificing...
Yes, you will be proud... Yes, you will know that C-E301 in not completely mysterious "referring incorrect memory" error, but just kernel panic due to memory leaks in heavily memory-optimised embedded system...
But then, when you realize that you can't repair machine even with such knowledge, you start to think that time you have spend on your studies is completely lost...
PS.
I just recalled, when I had to use "forbidden knowledge" - when I got machine (2nd hand, with total 38 copies) with unknown service password, and usual way (resetting with KM code) failed.
Then I found better way - not resetting, but recovering lost passwords.
So, how much $$$ would you like to pay for "forbidden knowledge" to cheat customers?
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