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I finally had time to get back to fixing the TDS3044B with no display. The problem turned out to be a bad solder joint on a surface mount choke that supplied Vcc to the display. The crack was so small it could barely been seen on a microscope. So, the problem was not the display. For those that need a display for a TDS3000B, the real part number is NEC NL6448BC20-08E. The other thing that was helpful in troubleshooting the display was a Hirose connector part number DF9A-31P. This gave me some more room to probe the display connections on the main board. Now I need to find the hub bits that hold the handle on the scope. If someone knows where to get those please let me know.
On 11/7/2019 10:00 PM, Tom B wrote:
If you look at this video https://urldefense.com/v3/__https://www.youtube.com/watch?v=Z_gvjmKHN4Y__;!b9GWhakWANQ!wEpfxjysOXjFgv3ZjJzwPT00sPf81J7-h9F-OyCNJMU1-f5Y3AG4Mbyun-yU$ it shows a part number on the back of the display as 65BLM04 and on the front of the display the tag says NL6448BC20-08. If you search each of these part numbers on ebay, the price is very different when they are actually the same part. The cheapest price I could find for the 65BLM05 is $158.74 (used), while the cheapest price for the NL6448BC20-08 is $88 for a new part. These appear to be exactly the same part. Any idea if there is any difference?
On 11/7/2019 2:28 PM, David Kuhn wrote:
Looks like a perfect solution for the NEC on the TDS3000 series and in the
NEC 65BLM05 Display (virtually the same display as the one TEK uses) in the
instruments I do a lot of work on.
Unlike the video, I would not remove the paper exposing the glue when
installing the strips. I don't want those LED strips permanently in my
LCDs in case they fail.
On Wed, Nov 6, 2019 at 11:40 PM Harvey White <firstname.lastname@example.org> wrote: