Fluke 97 schematic

[DDunfield]

Hi Guys,

Picked up an old Fluke 97. Unfortunately seller "forgot" to mention that several keys are non-functional. Looks like the keypad membrane is defective.

Downloaded the service manual online, but it looks to be the wrong one for this meter. My meter has a flexible membrane containing the keypad contacts, which connects via a ribbon cable which has 16 embedded wires. The manual I downloaded does not show this foil, and the schematic shows all 39 keys connected to ground on one side, and with individual connections into shift registers - this would require at least 40 connections (plus the power key). So it would seem the schematic does not reflect my meter.

It seems Fluke/Philips changed the design at some point.

Does anyone have, or can point me at the correct manual/schematic for this meter?  I've searched online, but all I can find is the same manual which is for the later revision.

Thanks,
Dave

PS: Has anyone tried/used the board that replaces the membrane which is available from "ScopemeterRepair.com"?  Looks like it would be a good (if expensive) solution, but I wonder how well it fits as it has to be larger than the original membrane which is very thin...?

[joeqsmith]

Dave,

There is a member here, Scott, who offered a much nicer manual to me.  I did not take him up on the offer and am not sure which version it is.   If you do a search on this site for Fluke 97,  you should find the thread.   

[DDunfield]

Just a quick follow up:

Still haven't located the proper schematic/manual, but I am happy to report that I received the replacement keypad board mentioned in my original post and it fits and works perfectly.

Dave

[chronos42]

Hi,
you have a newer version of the PM97, the digital board is different compared to the older Philips design. Search for a Fluke 105 manual in the net, the schematics are compatible with your instrument, only the firmware and the flash roms are different.
The flexible membrane is a weak point in this instrument, it is a common defekt that traces will crack. i have repaired these defects with conductive glue.