Hello,
Yes I have created another topic. Yes, I understand that this can be complicated to follow
Here is the link:
https://www.eevblog.com/forum/repair/measurement-on-memory-with-multimeter/but was specific on testing memories...
So:
I come back to this subject because it concerns the DSO Yokogawa DL1640 directly.
As a follow-up to all my tests on memories, I will explain what I did this afternoon.
I changed the U911 memory and did a power-up test.
And there, miracle, the error in 753 in red on the whole screen no longer appears.
All 4 channels appear functional!!!
If I go to the calibration menu, it works perfectly.
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But, inevitably, there is something very strange!!
The front panel indicates DL1640, therefore designed for a memory length of 8MB
The config indicates a memory length of 32MB and a model 701620 (See picture) The label on the cover indicates a model 701610 (8mb) in phase with the inscription of the front face (LD1640).
And what’s amazing is that the acquisition error when doing the memory test is on all 4 channels now!!!
The version looks old 1.2 Most recent 1.53
see here:
https://tmi.yokogawa.com/fr/library/documents-downloads/firmware/dl1620dl1640dl1640l-digital-oscilloscope/The firmware looks identical for both models.
Now I don’t know what may have been "cobbled together"
There is a card reader, so if I want to make an update I have to buy a card. I have to look into how it works?
I’m thinking about what to do next
I’ll get a can practice with (Lots of buttons and functions) LOL
cdt