Electronics > Repair
Fluke 199C scopemeter repair
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feedback.loop:

--- Quote from: Runco990 on June 15, 2021, 08:57:58 pm ---Wow... that is impressive! 

Should you decide to offer this in the future, I would be in the market for one module.   :-+

--- End quote ---

Do you have a scopemeter with no memory module? What model? Do you care about the firmware version?
Runco990:
I picked up a 199c a long time ago with hopes to repair it.... the module and battery were missing.
At the time, the scope meter was free, so I didn't care and shelved it for a better day.
If I can get it going, I already plan to do your battery mod. 
I DO know the scope works, as I had a chance to test it with a memory module from another one.

Love your videos, btw!  Always a treat!


--- Quote from: feedback.loop
link=topic=248730.msg3588783#msg3588783 date=1623797083 ---
--- Quote from: Runco990 on June 15, 2021, 08:57:58 pm ---Wow... that is impressive! 

Should you decide to offer this in the future, I would be in the market for one module.   :-+

--- End quote ---

Do you have a scopemeter with no memory module? What model? Do you care about the firmware version?


--- End quote ---
feedback.loop:
Uploading the firmware just in case anyone is interested.
asis:

Hi,

Serial number of your "reference" scopmeter: DM8460252 (look at the back of the case, bearing in mind that the cover may be from another device)
.
The dump (s) you have read contain the SW, S / N and calibration constants of this instrument only with its actual serial number (DM840252).

Several years ago, I was not tasked with cloning the A201 module.

I just did the work of reverse engineering this module without unsoldering anything, in about the same manner as you did, and made an adapter for programmer, with the help of which, copied the contents of FlashRAM in two steps 16bit x 2 = 32 bit.

I copied working dumps v702, v804 from them and made an UPDATE to Fluke 225C with busheat and language support.

If you do this, your hands will be untied and you will feel confident.
The serial number of the device is fragmented and located in different SST39VF800A chips.

The most interesting is how do you UPDATE SW to v7.0 - v8.04?

Fluke stated that UPDATE SW from v6.12 to v7.00 can only be done at a service center with a 5500A or similar calibrator.

In any case, you have done a great job.

My congratulations. :-+
feedback.loop:
Hi asis,

Yes, the number is correct.
Please give more details. Where is the number located?
What connector did you use for your adapter? I could not find a suitable connector. Do you have a part number?

I made one more module and updated it to 6.15, which worked fine. No idea yet how to go to 8.04.
It seems I need to figure out the calibration process since the copied module does not match another unit anyway.
Looking at the documentation, it seems quite simple, and I have everything except one thing: a source of 50Vpp 1KHz square wave.
Perhaps I could arrange a special circuit for this, but that is another project.
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