| Electronics > Repair |
| Fluke 199C scopemeter repair |
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| flukeandhp:
Hi feedback.loop, I appreciate all the information you have kindly provided in this thread and in your excellent videos. I also purchased 199C from eBay, which was cheap and did not work. It had the symptoms, which many others have seen as well. The power button only produced a beep and nothing else happened. It wasn't very clear whether the mask-ROM or the normal software ran, since the expected signal produced by the mask-ROM was not in one of the keyboard lines. I was getting ready to ask if I could obtain a new FLASH/RAM board from you, but the problem turned out to be that the keyboard cable was not properly working or attached to its connector. :phew: Anyone with the same symptoms that is one of the first things you should check. |
| professor_jonny:
HI I have a 199c and it was dropped and it no longer operates. upon opening it the memory module was not seated correclty and the red wire was broken off the battery. I have repaired the battery and it just does a short beep when plugging in the battery or if you press the power button, is this indication of the memory module being faulty/ corrupt ? I have tried to fit a new battery but still just the short beep sadly , I have access to another unit but I'm not keen to swap the module over and test the faulty unit if it some how messes or breaks the other unit. Can I hot swap and boot with a working module and flash a new image with the firmware update tool or something?. |
| asis:
Hi, Do you have a PM9080 or OC4USB communication cable? |
| professor_jonny:
Yes I have the optical usb interface cable cable. |
| asis:
Hi, Move the RAM module to a working ScopeMeter after inspecting it first. Plug in the power adapter and battery. Fulfill the conditions described in SM RAM Test (page 20-21). If you get a value of "zero" the module is OK. Turn on ScopeMeter in normal mode - should work. Move the RAM to the non-working SCOP and repeat the procedure. I advise you to download the circuit and check all the base voltages. Service Manual for Fluke 192/196/199 ScopeMeter. |
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