Hello!
I recently got a Fluke/Philips ScopeMeter 97 (Philips PM97 to be exact). I already replaced the four problematic capacitors on the display board (two of them already leaked a tiny bit). The new ones don't fit quite perfectly, but SMD work isn't necessarily my forte either. The device works perfectly in all measuring ranges. There are only two problems left:
a) One of the Fluke 1:10 probes (the gray one for channel B) makes any channel it its connected to... noisy. With other probes (Rohde+Schwarz) everything is fine on channel B. Which would rule out channel B of the PM97 as a problem. Can such a Fluke probe be repaired in a meaningful way? Probably not, right?
b) The other "problem" that makes me suspicious concerns the backlight. As soon as I turn on the backlight, a high-frequency sound is heard. It's kind of like a coil of some graphics cards when the FPS goes too high. This occurs equally with battery operation and mains operation. This doesn't seem right, does it? Mayhaps my replacement SMD Caps are no good (even if measured good). As far as i know, some of them are for the EL Backlight. I could order some quality panasonic SMD caps for another replacement.
Best wishes from germany and thanks for any suggestions in advance. Have a nice day!