8 Jun
2013
8 Jun
'13
4:39 a.m.
On Wed, 5 Jun 2013, allison wrote:
I got to see one... a broken one and it was a mechanical nightmare but
we replaced the backlight with LEDs and wired them to DC. The HV supply
was also bad on that one. The result was serviceable. Hint use a lot of
white leds on pcb strips in series as you want a lot of dispersion over
brightness, a sheet of thin white paper over the LEDs helped disperse
the light better.
That's not a bad idea and is something I'll keep in mind for the future.
Since these displays are grayscale and use a tinted plastic material over
the front, color correction as you would have with a color LCD is pretty
much a non-issue.
On 06/05/2013 10:41 AM, Jim Brain wrote:
They are far from scarce. I must have a bucket of the 1MB modules
common to the later 286-386-486 machines.
Memory modules for the 286/SLT? These machines didn't use industry
standard SIMMs. They used a proprietary module that was specific to the
286/SLT alone. I'll see if I can snap a photo of one this weekend.
How much
memory did you end up with in your 286/SLT? There are 3 slots
under that aluminum box/cover at the center-front of the machine with
the outer plastic shell removed. Those slots can use any combination
of 1MB and 4MB modules, but those modules are proprietary and are
practically impossible to find today.
I have 2 1MB modules. Be very, very careful with the LCD in these machines.
The backlights are
not well supported and are very easily broken. I'm still on the hunt for a
replacement LCD for one of these that's been sitting in my project pile
for /years/.
I have not opened mine, but is it possible to replace just the backlight,
or is it a single encapsulated unit?