20 Sep
2010
20 Sep
'10
7 p.m.
Tony Duell wrote:
As all of us who do hardware repairs know, a
multimeter is an essential
piece of test equipment.
Until a couple of days ago, I used a Fluke 85 (original series). It did
what I wanted, there were 2 parts of the design I didn't like, but apart
from that it was great
...
Anyway, I was using this iustrument on Saturday (actualy for testing the
PSU, etc, in an HP2623 graphics terminal) with no problems. I put it away
in my tool drawer. On Sunday I got it out for some other tests and
discovered the display had failed. It's totally black for half the
height, I asusem the liquid crystal material has leaked out (although the
glass is not obviously cracked or broken). AFAIK nothing fell on it in
the tool drawer (there are no really heavy tools in there anyway), it
wasn't dropped, etc. Just one of those things.
This may simply be a case of reseating the LCD screen. It is a
compression fit against the PCB with a conduction riser, try reversing
the riser and power it up again. I've kept a few meters going past
apparent best-before-dates doing this.
John :-#)#
-tony