Electronics > Repair
Fluke 199C scopemeter repair
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cozza:
I'd be keen for one of the keypad replacement boards, or to add one to your order if you're going to do a small production run. I use my 196B almost daily for work and it would be great to have a spare keypad standing by in case the foil keypad fails!
lostking2008:
Good point. Thanks.



--- Quote from: feedback.loop on August 06, 2020, 09:25:25 pm ---I don't mind sharing the gerbers. I am a bit reluctant because I am not proud of the connector placement. I would like to move it a bit down, so that it wouldn't need to be soldered a bit above the board, and it would be a bit easier to install the board. Perhaps I should make the change and run another batch, but I don't need them myself. Is there enough demand, say for 10 boards? Say, we call it $20 plus postage for one kit: board + connector + falt flex (with opposite-side contacts) for the new batch. I still have a couple from the first batch ($30 + postage).

--- End quote ---
lostking2008:
Hi There, I need a memory module for Fluke 199C, but it has been discontinued by Fluke back in 2017. Unfortunately, the service manual doesn't come with the circuit drawing of the Flash/SRAM module (80 contacts in two rows, 0.8mm pitch) itself. Does anyone have a schematic drawing of the memory module?

Thanks,
Ken
lostking2008:
Hi Feedback loop,

Just curious where did you obtain a blank flash/sram module for your Fluke 190 series scopemeter?

Thanks.
Ken


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FeedbackLoop
2 days ago
I do have a Fluke serial adapter. I would be interested in maintenance commands like loading firmware into a blank flash/sram module, maybe changing scope type from 196 to 199 and such. Any info on this? Thank you.



David V
David V
1 day ago
@FeedbackLoop  Sorry, the only information I have regarding the commands is the information that came on the original PM9080 interface disk (3.5" floppy version 1.3) for DOS. These are all ( two letter) operating commands. Fluke can be awfully stingy with information.



ken tsai
ken tsai
5 hours ago
@FeedbackLoop I was wondering if the optical port of the fluke scopemeter (essentially a UART port) can be explored by the OPEN on-chip debugger along with GDB (The GNU Project Debugger) to create breakpoints during the firmware loading process in Fluke 190 series scopemeter.



FeedbackLoop
FeedbackLoop
1 hour ago
@ken tsai I don't know. Sounds like a lot of work. Probably easier to make an adapter for a programmer to read-write the flash chips directly. At least for the models with a flash/sram module (19x B and C). This discussion is in a wrong place. Should we move it to https://www.eevblog.com/forum/repair/fluke-199c-scopemeter-repair/
feedback.loop:

--- Quote from: lostking2008 on August 18, 2020, 07:51:41 pm ---Hi Feedback loop,

Just curious where did you obtain a blank flash/sram module for your Fluke 190 series scopemeter?

Thanks.
Ken

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FeedbackLoop
2 days ago
I do have a Fluke serial adapter. I would be interested in maintenance commands like loading firmware into a blank flash/sram module, maybe changing scope type from 196 to 199 and such. Any info on this? Thank you.

--- End quote ---

I did not say I have it. I spoke hypothetically. Suppose we manage to produce one. How do we program it? I see only one method at the moment: building an adapter for a programmer to access the flash chips directly (with a jumper selecting one of the two chips), and copy from a working module, but that is a lot more additional work. It would be nice if there was a method to put a blank module into the scope and program it.
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