fixing/replacing LCD |
Post Reply |
Author | |
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
Post Options
Thanks(0)
Posted: 24 June 2019 at 5:14pm |
Hi I wonder if anyone can give advice on getting this working. It is display on a Sabine PowerQ ADF4000. I understand Sabine shut down several years ago. there are several vertical lines as well as a horiznontal line (and maybe the top line of pixels missing too). there is also some damage on the far right of the display but this I can live with. if i press the chip behind the main bunch of lines they all disappear five chips on back. part number is TM24064B the input connector is 20 pin. I guess it is approx 64*256 pixel anys suggestions on repairing it. Should I try resoldering the chips? or does anyone know where I can search for a replacement? cheers Phil
|
|
kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
Post Options
Thanks(0)
|
if you're lucky you might be able to remove the glass and clean the zebra strips but the cloudy bit at the end will get worse and nothing can be done. Isn't it a standard alphanumeric ascii display, using symbols to draw the faders? If it is, what's the resolution?
|
|
Kevin
North Staffordshire |
|
APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
Post Options
Thanks(1)
|
It’s a 240x64 pixels “graphics” display, hence TM24064B (TM
240 (x) 64B) on the pcb and looks similar to a Midas MC240064GD6W (the Midus is a
modern black on white display). The MC240064GD6W should go in with
minimal modification… On the old display the contrast pot is connected between
+5v (pin 3) and ground (pin 2) with its wiper going to pin 4 (Vo), however the Midus
display requires the pot be wired between +5V (pin 3) and a negative voltage,
this is derived by the display itself and is presented on pin 9 of the displays
connector, this pin (pin 9) isn’t connected to anything on the old display. The wiper
still connects to pin 4.
All other pins have the same functions.
The standard alphanumeric type displays can display a few custom characters (8 to be exact) by writing data to the CGRAM RAM, however these alphanumeric displays always have a 1 pixel gap around each 5x7 character. The “graphics” displays don’t have these gaps as the display is treated as one large canvas with each character being 8x8 pixels and can be drawn anywhere on the canvas. Edited by APW - 24 June 2019 at 11:24pm |
|
APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
Post Options
Thanks(1)
|
This one will go in without modification:
|
|
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
Post Options
Thanks(0)
|
fantastic, thanks.
|
|
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
Post Options
Thanks(0)
|
got the display working, thanks. also fixed the power switch. needs a new ground lift switch but works with it missing anyway. good buy at £33
|
|
Post Reply | |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |