Electronics > Repair
Fluke 87 IV Repair help!
Zamagen:
Hello,
I've had this meter for a while, bought 2nd hand fully working, never had any problems.
Suddenly it started beeping continuously with each position of the dial; I've read the problem could be caused by dirty sockets, so
I desoldered, soaked in alcohol and resoldered the connectors.
Now it doesn't beep anymore, but it seems that the inputs are non functional.
I can't measure a DC voltage or a resistance, if I take another meter and measure the internal resistance between com and V/Ohm I get an open circuit, but according to other posts it should be some MOhms.
I can't see broken/missing parts and the resistors seem to be Ok.
Does someone have any possible hint on what could be the problem?
TIA.
m k:
Schematics for old version is available.
Have you assembled it correctly?
silly sausage:
regarding the input sockets, my 83v did the same,tried cleaning with no luck, in the end i unsoldered the socket block then put it inside a sock and threw it in my washing machine, then let it dry and refited it, its been fine since.
Zamagen:
I'm pretty confident the problem is in the metal contacts inside the rotary switch.
But I've tried bending them back and forth so many times that one broke. Is there a source for compatible contacts?
coromonadalix:
you find them on Ebay at astonishing prices per part .... unless you find some 87iv 89iv 187 189 for parts and they are there ??
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