LECROY LT342 PDF

The floppy drive simply suffered from a stretched belt, so it was just a matter of getting the right replacement. Someone in eBay was selling a genuine replacement for the drive and I was lucky to get it. Simple as being at the right place at the right time…. This one I knew was going to be easy. The CCFL tube ages and, even before that happens, the reflective thin paper that surrounds the tube can turn black and warped, preventing the light from reaching the difuser, which darkens the screen.

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The floppy drive simply suffered from a stretched belt, so it was just a matter of getting the right replacement. Someone in eBay was selling a genuine replacement for the drive and I was lucky to get it. Simple as being at the right place at the right time…. This one I knew was going to be easy.

The CCFL tube ages and, even before that happens, the reflective thin paper that surrounds the tube can turn black and warped, preventing the light from reaching the difuser, which darkens the screen. You might want to take a look at that. I measured the delay from power-on to the backlight enable signal. Can you see the color difference between the two traces? Agilent DSO-X oscilloscope colorblind hack click on picture to follow. I built a small PCB with the regulator, a 2n to cut the current and a tiny PIC microcontroller for the delay so I could about routing the enable signal to my circuit oh, and because I love little PICs :.

There is great information about this scopes in the LeCroyOwnersGroup groups. I suspected they actually did not replacement, but just a bit of maintenance. And I was right. Once cleaned they work perfectly fine. You do need to desolder a two-row pin header to remove the PCB that covers them though:. Once you gain access to the top side of the encoders, use a flat screwdriver to free from the tabs the part that holds the shaft.

I found the track to be actually clean, the problem was a deposit on the surface of the wipers, right where they slide on the surface of the contacts. Carefully remove the deposit with a sharp tip:. After cleaning the wipers, I carefully forced them into a higher position so they have a bit more pressure on the contacts. As explained by the seller, the CH1 BNC connector had suffered a big impact and it was damaged to the point that it was impossible to insert a male BNC connector into it.

I knew it was going to be hard to find a replacement, so I replaced it with the one from the EXT trigger port, which was not as important for me. After a long unsuccessful search for that strange Hirose connector, I found that Lecroy used the same connectors in oscilloscope adaptors of that era so I bought a cheap one:.

The ground post had suffered a crash and was out of aligment so I removed it and flattened the metal plate:. The fan was noisy and old so I replaced it with a very silent Noctua PC fan that provides more than enough airflow:. I could make a similar one with the 3D printer, but I still hope to find a genuine replacement for this now as-new looking oscilloscope that it is still a workhorse:.

This is why I like this scope. Four channels with the colors you want, with the colors you can actually see:. Home Projects Photo Music Menu. Lecroy LT Repairs. One knob was missing and the floppy drive did not work. The encoders where hard to use, very erratic. You turned them fast and nothing moved and you turned them slowly and the value jumped to infinity.

Very dirty outside, and incredibly dirty inside. I had to hack my modern scope so I could tell one trace yellow from the other green. Well, anyhow, this is what I did to put this scope back in service again. The floppy drive The floppy drive simply suffered from a stretched belt, so it was just a matter of getting the right replacement. Agilent DSO-X oscilloscope colorblind hack click on picture to follow I built a small PCB with the regulator, a 2n to cut the current and a tiny PIC microcontroller for the delay so I could about routing the enable signal to my circuit oh, and because I love little PICs : I re-used the original connectors.

You do need to desolder a two-row pin header to remove the PCB that covers them though: Once you gain access to the top side of the encoders, use a flat screwdriver to free from the tabs the part that holds the shaft. Carefully remove the deposit with a sharp tip: After cleaning the wipers, I carefully forced them into a higher position so they have a bit more pressure on the contacts. Four channels with the colors you want, with the colors you can actually see: I managed to get one knob so now the scope is complete!

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