#119

A memory module for Fluke 199C (or 199B, or 196B, or 196C, or 192B) was reproduced.
Forum: www.eevblog.co...
Fluke 199C repair: • #93 - Fluke 199C scope...
Followup: • #94 - Fluke scopemeter...

[@Thesignalpath]

Nicely done!

[@jdmccorful]

Quite an advance level of "home" shop work. Impressive. Thanks for the look.

[@worstuserever]

Tremendous analysis and solution, expanding the practical limits of hobbyist repair.

[@nikmilosevic1696]

Great work, love it when capable old equipment is revived!

[@OrbiterElectronics]

That's an awesome job FBL, well done mate 👍👍

[@mlefe09]

This is incredible!! Amazing work!!

[@bubblehead78]

I watch a LOT of teardown/repair/electronic videos. I've never seen anyone homespin a memory module like this. Fantastic!

[@octavmandru9219]

Amazing! Your patience is an example for anyone. You must be a great parent :)

[@Iassonas65]

Bravo, you are a Wizard. Amazing home brew project 👍

[@glenwoofit]

Wow, Great Job!

[@ashpowell9451]

Great stuff!

[@OrinSorinson]

I wouldn't know where to start but I know that this is impressive work.

[@warup89]

May the 199C live forever. Still very capable.

[@twobob]

lovely meter. worth the effort

[@DeadKoby]

Very impressive work. I do some electronics work, but not to this level. We share the same philosophy of FIX IT, don't junk it. If I can't fix something, I usually sell/salvage the parts.

[@amirb715]

WOW! this was fantastic. Excellent job :-)

[@TheDefpom]

Very nice work, well done. Are you going to share the gerber files and flash data online somewhere in case someone else wants to do it too?

[@andymouse]

Fantastic work ! it is a shame about the ENIG, will it eat away at you and mean you will buy some more ? if it was me I would be happy with the result and call it done, nice technique with the BGA, I have never attempted this but if I did I would reference this vid...cheers.

[@johnnymotorboat8824]

That was impressive.

[@brendanbarbour8568]

Great work. 16 layer board...wow...really great effort. That Scopemeter must be work the effort

[@feedback-loop]

6

[@SidneyCritic]

It would take me 6 months to route out 6 layers - lol -. Brilliant work.

[@MichaelMantion]

In my life time i would be able to route 0 6 layer boards that complex.

[@AnonymousRepair]

Nice work, bottom heater (preheater ) should be set to 160 to 175 degrees Celsius (320F to 347F)

[@artursmihelsons415]

Excellent job and great results.. 👍

[@gillywild]

Wow! Stunning work. I would have thought the code would be protected.

[@cambridgemart2075]

With the firmware in physical ROMs it's very difficult to protect it, as anything done to stop it being read also stops it working in its intended function

[@TKomoski]

Your a better man than me Alex, I take my hat off to you

[@originalmianos]

Incredible. You win!

[@gbiohazard]

Impressive job. Really nice.

[@emmanuelvallee5386]

6 layers PCB reverse engineered !!! excellent, brilliant !

[@feedback-loop]

It seems to me that the Fluke module has 8 layers, but I am not entirely sure.

[@bfx8185]

That's a great job! Love it!

[@eumesmo-kd1tr]

wow amazing congrats

[@BjornV78]

Nice repair and reverse engineering.

[@ngoayle9249]

Are you going to share the schematic file or gerber files ?

[@injoelsgarage3934]

Outstanding!

[@MONKE12388]

Nice job!!!

[@vincei4252]

Nice reverse engineering and final result. Yeah, I made the same ENIG mistake on some RF/protoboards boards from JPLCPCB. It doesn't affect the functionality but it does niggle me every time I look at the boards and remember they're not the way I intended them to be made. Then again who can argue with the price of the boards, eh?

[@TKomoski]

What about using gold leaf if it bothers you that much

[@louchitchat]

very impressive

[@AA-en8gw]

Brilliant…👍.

[@MortezaBayati]

It is insane. Big like

[@edmanbravo650]

Muy bueno

[@lengocminh9834]

very good, Can you share us a Schematic and PCB?

[@AmericoLuiz]

Very Good.

[@richardballinger517]

Nice one!

[@douro20]

If you had access to a microfocus X-ray system it would help a lot with reverse-engineering boards like that.

[@galaxyb1103]

Hi, would you have any idea what could be the issue with a 199c scope where the 2 scope traces don't show at all? Some people blame the c-asic, i have 2 units with the same fault on both channels, there is no clicking relay noise when turning on the unit or the channels. Thanks.

[@feedback-loop]

Anything is possible. Do some checks according to the service manual. If C-ASICs are faulty, there is little hope. I have a video about this: kzbin.info/www/bejne/r5-8d4ePrqZpeqc

[@AB-yu2tj]

Wow. Nice. I wish I could understand the significance of placing the chips Hi and L.ow? Can anyone explain please.

[@feedback-loop]

this is a 32-bit module. each chip has a 16-bit data bus. so one FLASH chip is connected to the low bits (0-15) and another one to the high bits (16-31). the same thing with RAM chips, but it does not matter which is which.

[@AB-yu2tj]

@@feedback-loop thank you

[@AB-yu2tj]

@@feedback-loop I was wondering if I could ask you a question about circuit over heating. I figured you would know about this or where to start. I looked to see if there is a different way to getting in touch with you. But non was listed. Question is unrelated to this video.. I have a PCB that the large wire wound resisters are getting very hot around 300F. The way they are installed it is obvious that they're supposed to get hot but I think if there's some problem with the design because this heat eventually destroys the board in a couple years. This is mostly after the filter caps. As power goes through some resisters, diodes and mosfets before going through a hi frequency Step down transformer. I can send in picture and more. I would even pay for help. Just let me know how to pay for your help.

[@feedback-loop]

@@AB-yu2tj I would suggest opening a topic on EEVblog forum. www.eevblog.com/forum/repair/

[@AB-yu2tj]

@@feedback-loop oh ok. I am a member there. I will do that later this week. thank you.

[@AA-en8gw]

Any chance that you may provide more details on how we got to 6:12, if possible, please?

[@feedback-loop]

You mean routing the board? First, connections were traced, which was not very difficult since everything goes to the edge connector, and everything is more or less straightforward. Then just route the tracks on the board according to the schematic. I spent quite some time trying to pack everything into 4 layers (that would be much cheaper to make), but that was impossible, so I gave up, added 2 more layers, and rearranged some tracks.

[@Gengh13]

It's a shame about the ENIG finish, I fear that without it the connection will fail after a couple of months. Otherwise a really good job.

[@JerryBiehler]

Nah, back in the day many ram simms did not have gold and they held up just fine.

[@Rucas1973]

If you had 2 memory modules and 2 flukes why did you make more? And how long did it take to trace everything?

[@TKomoski]

JLPCB has a minimum ordering amount

[@Rucas1973]

@@TKomoski Thanks but i'm not asking that, he has 2 flukes and 2 memory modules so why make more, 2 flukes only need 2 memory modules.

[@gordonwedman3179]

@@Rucas1973 Right at 28 seconds he says he is missing the memory module for the unit he is working on.

[@MOHAMED-qh3px]

Hello FeedbackLoop please u can upload firmware For memory module thank you

[@feedback-loop]

Will do on the EEVblog forum. Link in the description.

[@MOHAMED-qh3px]

@@feedback-loop Thank you so much Sir 🌹🌹

[@MerlinMerlinL]

The great moment of truth

[@jovangrbic97]

autoroute FTW?

[@buildstoys]

Any interested in selling a blank or assembled board?

[@feedback-loop]

yes

[@buildstoys]

@@feedback-loop Sent you an email!

[@RyanUptonInnovator]

Very Good.

[@user-vp2iw3us8c]

Great work!