Products > Test Equipment
HP 3465A DMM repair
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xrunner:

--- Quote from: Vince on May 25, 2022, 12:28:41 pm ---BD, this thread is lacking in the annotated schematic department... this thread needs more illustration please ! >:D

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Did you check that option when you paid for your subscription?  :-DD
Vince:

--- Quote from: xrunner on May 25, 2022, 12:53:27 pm ---
--- Quote from: Vince on May 25, 2022, 12:28:41 pm ---BD, this thread is lacking in the annotated schematic department... this thread needs more illustration please ! >:D

--- End quote ---

Did you check that option when you paid for your subscription?  :-DD

--- End quote ---

Pretty sure I did !  >:D
Vince:

--- Quote from: MrYakimovYA on May 25, 2022, 12:39:31 pm ---
--- Quote from: Vince on May 25, 2022, 12:28:41 pm ---BD, this thread is lacking in the annotated schematic department... this thread needs more illustration please ! >:D

--- End quote ---
There are plenty of circuits diagrams, theory, figures, descriptions ( :P): http://hparchive.com/Manuals/HP-3465A-Manual-SNprefix-1546.pdf

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Yes I know what a SM is thanks... but the point of a repair thread is to explain and show people what there is to show to understand and see what's going on. If it's just about a one liner  " I replaced a diode have a good day", well might as well not create the thread to begin with  ::)

Vince:

--- Quote from: bd139 on May 25, 2022, 12:51:10 pm ---If only it was that easy. The revision of the DMM I have is not covered by that manual and the component placement and front end are slightly different.

The only copy is the Keysight one and that's awful quality scan:



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Wow crap scan indeed, can't even see which one is CR9 !  :-DD

Looks like the one on the up side of the input path, going to the negative 7V rail.... OK... so you were wrong, your offset repair DOES pertain to my old Rochar Nixie DVM, as this is general purpose stuff and my meter has something similar a s well 8)

bd139:

--- Quote from: Vince on May 25, 2022, 01:23:09 pm ---
--- Quote from: MrYakimovYA on May 25, 2022, 12:39:31 pm ---
--- Quote from: Vince on May 25, 2022, 12:28:41 pm ---BD, this thread is lacking in the annotated schematic department... this thread needs more illustration please ! >:D

--- End quote ---
There are plenty of circuits diagrams, theory, figures, descriptions ( :P): http://hparchive.com/Manuals/HP-3465A-Manual-SNprefix-1546.pdf

--- End quote ---

Yes I know what a SM is thanks... but the point of a repair thread is to explain and show people what there is to show to understand and see what's going on. If it's just about a one liner  " I replaced a diode have a good day", well might as well not create the thread to begin with  ::)

--- End quote ---

To be fair I did say "one of the input clamping diodes" which is pretty easy to locate if you have any interest in the front end of the DMMs.

Sometimes it's better to leave breadcrumbs and a journey because the people who don't follow the breadcrumbs as a rule aren't going to be satisfied with the destination either
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