Electronics > Repair

Replacing the LCD-Backlight(EL-Foil) on Neutrik A1, Edit: New Display wanted

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Martin72:
Fu....
Opened it again and indeed, there was some dust/crumbles on the zebra strips.
Took them away with tape, cleaning the pcb contacts with isopropanol, reassembled it....Worser than before... :P
Now it´s open again and I have to think what´s the matter, my suspicion is the tape used for the lighting.
It is quite thick, thicker than what was stuck before.
Before the exchanging everything was fine, never touch a running...

Martin72:
In the end, I bought a used display that works better, but its backlight is also almost at the end.
A completely new display would be best, but that's where the problems begin.
5.3”, 256x128 dots and 4 bit parallel port....
Not to be found.
The stupid thing is, at the time the displays were ‘naked’ and only had columns and line controllers on board.
So it is here too.
On the A1 is a Z80 processor which in turn drives a SED1330F - and that controls the display via the 4 bits.
I would like to use a modern display, but I don't know how to connect it to the SED1330F.
I'm sure you would need some kind of converter in between, that's beyond my knowledge in the display area. ;) :P

coromonadalix:
datasheet attached, should be like this

you seems to have a controller less display,  column and row drivers only

on ali  i did saw you could replace your backlight with some "cuttable" ones ?? 

and for a subst display  on Ebay they start at 100$ usd   outch

theses :   are supposed to be equivalent ??
PG256128C
PG256128ERS-CNN-H
EG4401S-FR-1
DMF6104N

https://www.ebay.com/itm/164903212712?   

Martin72:
Hi,


--- Quote ---you seems to have a controller less display,  column and row drivers only
--- End quote ---

Yep, see my post before.
I also know the datasheets and the prices for the so-called replacement types are steep.

Optrex Replacement

coromonadalix:
try the posted numbers, some are less expensives ...

alas prices have become  crazy as ..... 

i paid 25$ usd  for 256x128, and 37$ for 320x240 ones    before covid       :palm:     good luck

unless finding ones with the SED controller on them and do some magic  directly from the z80 mcu    :palm:

this one on ALI ?   a 5vdc  backlight ??

https://www.aliexpress.us/item/3256805232721356.html?


a search on ebay.de ?
https://www.ebay.de/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=RT256128A-1&_sacat=0

dmf682anf on ALI      97 euros ??
https://www.aliexpress.us/item/2255800807401192.html?

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