Solartron 7150 plus LCD & Circuit Diagram

[Scrim]

I have a Solartron 7150 plus that had a faulty LCD display. I pulled it out
of it's socket in case it was just a bad contact, but one of the epoxied
metal pin contacts fell off. After fixing and plugging it back in the
display is fully functional except that from the usual square on viewing
angle or below the contrast is very low so it's hard to read at all. Viewed
from higher angles the contrast improves to normal levels.
What's happening and can I fix it?

Also, can anyone help me get a circuit diagram for his meter?

Thanks,

Scrim

 

[bz]

"Scrim" <nospam@nospam.nospam> wrote in
newsANXm.68189$%q6.25343@newsfe08.ams2:

I have a Solartron 7150 plus that had a faulty LCD display. I pulled it
out of it's socket in case it was just a bad contact, but one of the
epoxied metal pin contacts fell off. After fixing and plugging it back
in the display is fully functional except that from the usual square on
viewing angle or below the contrast is very low so it's hard to read at
all. Viewed from higher angles the contrast improves to normal levels.
What's happening and can I fix it?

Also, can anyone help me get a circuit diagram for his meter?

Thanks,

Scrim

Perhaps you left out the polarizing filter? (or rotated it 90 degrees, if
it is square).

The LCD effect depends on polarized light.
http://en.wikipedia.org/wiki/Liquid_crystal_display

Light reflected at an oblique angle is naturally polarized, allowing the
display to be visible at an angle, even without the front filter.


--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.