19 Dec
2009
19 Dec
'09
11:46 a.m.
First the TU56 broke, then the Lilith disks goes, and now it is the HP
Integral's turn .
The Integral, stored a year ago in working condition, has a display problem.
After switching on the Integral makes all the right noises, but the
display remains off.
Anyone has a pinout, or schematic , of the Sharp LJ512U03 EL-display
as used in the Integral ?
Here's the pinout :
Gnd --o o-- Gnd
+18V --o o-- +18V
+5V --o o-- Gnd
Gnd --o o-- Gnd
Rst --o o-- Gnd
VSync --o o-- Gnd
HSync --o o-- Gnd
DotCLk --o o-- Gnd
DotsA --o o-- Gnd
DotsB --o o-- Gnd
Ths display is controled by the (custom) 1LL3-0005 chip on the Logic B
PCB. There's 16K 16 bit words of DRAM (4 off 4416s), a couple of dot
shift registers and some glue logic.
You can get my unoffical Integral scheamtics from the Australian Museum
site. It's an old version, I know there are errors (but AFAIK none in the
display controller circuit). I have produced an updated version, but for
some reason it's never got to the site.
And I didn't try to draw out the display module itself. It seemed to be
all custom stuff. There is what appears to be an HV PSU on the display
module PCB that it probably repairable -- I can try to figure it out if
you think that's the problem.
-tony