Lately I acquired two old Flukes, namely an 8050A in perfect condition, together with an 8060A that was DOA and sold as spare parts donor for a small token.
Some sort of liquid found its way through the display cutout and did some nasty things to the upper part of the PCB. Photos taken are after my initial clean-up, so sadly I can not give you the complete tour :/ I need to work on properly documenting things like that...
The victimThe 8060A won’t turn on.
InvestigationIn this stage, I already cleaned the protective plastic window on the display and started cleaning the back part of the case.
Broken power railAfter some thorough cleaning of the back of the main PCB with rubbing alcohol and a glass-fiber pen, I found a trace to be corroded away (+9V from the battery). I soldered in a piece of wire, but that did not fix anything. (vertical wire next to the green on/off switch)
After obtaining a Solder Peak SP-1010DR desoldering station, things move forward...Here you see the DIP40 socket removed and some corrosion removed (the PCB was eaten away and maybe shorted due to nasty brown goo (next to the via in the upper middle section between the yellow resistor network and the resistors on the right.
Also, you can seem some of the brown nastyness that is still sitting on the PCB.
The suspectThe +9V power trace is corroded on the front and back, the via is completely eaten away.
An easy fixDue to the awesome performance of the new desoldering tool – sucked all the corroded gunk right out of the via through-hole – I could use a piece of wire to rebuild the trace.
The verdictAfter dropping in the DIP socket and some further cleanup (I opted to also remove the resistor network and clean the pads there, because of brown nasty stuff between the legs), the initial test seemed fine.
For the win After reassembly, the meter passed the self test, all segments are working and it displays correctly.
I still need to check through all the measuring modes, but in a first look, it seems to still be spot on! All the buttons work, the continuity tester is quick and latching (however I like the frequency of the 8020B beeper a lot more) and the few measurements I have taken agree with all of my other meters.
I call it a win for today!
Shoutout to mr.modemhead for providing a lot of info on the meter
Best regards,
Frederik