Hi,
I have a faulty Fluke 707 laying around for quite a while, and after a closer inspection, I realized this unit has seen better days.
Someone has been here before, and they weren't exactly kind. A few ICs have been removed, and the pads along with them:
Many blobs of solder, poor technique, twisted components, flux all around, bodge wires.
C86, below the encoder, is missing. They soldered an upsized cap on the bottom:
I have not found any teardown so far. I need a couple of things to give this a try.
First, I need to check if the components are right, including the values of the passives. So I kindly ask if someone could share high-quality pictures of their board, with the IC markings visible, as well as the passives.
Also, if by any chance a good soul could measure the values of the caps, I'd appreciate it. The reason being, with all these blobs of solder around, I don't trust these are the right values, despite probably not being critical.
Of course, the best option would be a BOM and schematics, but we know we don't get that from Fluke. Maybe someone here did a reverse engineering?