Hi everyone, I’m new here.
I followed another post by Multiple Cheese Slices, who had a Fluke 87V showing dashes, which he repaired with the great assistance here.
I wanted to share my related problem with my Fluke 87V that I recently purchased for repair, that displays the same dash - - - - issue. Here’s some baseline of my meter:
- It came without the plastic selection knob (which I replaced)
- damage to the J1 connector with the common port broken (I suspected this with eBay pics showing this port misaligned)
- the battery cover/area on one side looks partly melted. (PCB inside is fine, not burned) I suspect it was near a soldering iron or something
- looks like meter got hit, or dropped which caused the J1 connector damage.
After opening the meter, the PCB at the COM was also stressed, and was bent up, and started to crack. When I removed the J1 connector, it is much better aligned, more flat, and I don’t see any trace cracks/opens as a result, and checked continuity in those areas. Also found solder joints cracked near J1 lower right of PCB which I re-soldered. I reviewed the 8X V series schematic and inventoried all the components, and which ones that aren’t installed for an 87V. Everything looks correct, except found U8 is missing ( I could see the solder flow pads that the part used to be there). I have a replacement part on order. I also found R2 sticking up on one side which I re-soldered. Regarding J1, I have a new replacement, but was holding off on soldering it in, as I want to solve the dash problem first. After I get the new U8 replacement (LT1790-2.5) I’ll post +2.5 / +.0.8 voltage readings. So far though, I confirmed U6 output, and U10 input voltages are correct with ground reference as BTM. COM port as reference, is currently not okay. I was hoping the open R2 repair would correct that, but it didn’t.