| Products > Test Equipment |
| Old Fluke Multimeters |
| << < (112/192) > >> |
| Martin.M:
the Nixie is not shorted bec. they are all parallel on the bus, this Fluke is multiplexing. If there is anything shorted, all nixies will display the problem. The both transistors, the pnp and the npn are replaced now, and I have still the problem. This will be not so easy |
| Martin.M:
Q36, Q40 :) |
| Martin.M:
next: +/- lights don`t work. ACV DCV mV k \$\Omega\$ M \$\Omega\$ = OK |
| bitseeker:
--- Quote from: Martin.M on October 16, 2018, 07:10:53 pm ---Q36, Q40 :) --- End quote --- Not bad! It's coming back to life. :-+ |
| GregDunn:
OCD at work here - I was just browsing the 8600/8800 manuals to see what LED displays they used. Interestingly, my copies of the manuals do not have the page numbers which contain the display board schematics! I have a copy of the 8810A manual which does, however. It looks to me that Fluke used a variant of the MAN72/MAN73 displays for all of these meters, based on a comparison of the 8810 schematic and BOMs for the other two meters. Even my Dana 4200 uses essentially the same display. I guess that shouldn't surprise me because the MAN72 was very widely used in the 70s. My question: Has anyone ever had to replace a LED on one of these? I suspect failure is very rare (in fact I bet switches, relays, and caps go out far more often), but since I plan to keep them running as long as possible it would be handy to have a compatible display part number in my archive. Lacking that info I wouldn't hesitate to plug in a MAN72 compatible part and try it, but I'd like to know if anyone has actually done so. |
| Navigation |
| Message Index |
| Next page |
| Previous page |