EMU Proteus 2000 display vervangen

[VasC]

Beste SFers,

Weet iemand waar je een nieuw LCD scherm kunt kopen voor de Proteus 2000 serie?

Iemand hier ervaring mee?

dank! VasC

 

[barn]

Wilde deze site aanraden: http://www.eprelectronics.com/store...rice=&viewAll=undefined&customListIds=&venID=

Maar zie dat de lcd out of stock is...

Ik heb mijn knoppen pcb's aan beide kanten vervangen. Als nieuw

 

[marcvang]

Als je het type weet ( staat op de achterkant) kan er vast een vervanger in van farnell bijvoorbeeld
Wil ook wel voor je kijken als je type pb't

 

[VasC]

Bedankt voor de reacties. Overigens is het scherm niet (echt) slecht te noemen. Het lijkt wel eens in de tijd te veranderen.

Ik kwam trouwens deze interessante post tegen vanaf een ander forum:

"Just a few days ago, I was given a Virtuoso 2000 to fix with an almost unreadable display.
You can read it at the 6 o'clock position but at no other angle.
The Virtuoso contrast control system makes a difference but nothing useful, going from +7 to -8 just makes things worse.
As a techie, I know a bit about LCD's and as the display's contents were correct for every menu choice, and the backlight was fine, I went hunting for a fault in the V2k's contrast control system.
A latch chip on the V2k acts as a 4 bit DAC that supplies the contrast voltage for the display. Thorough testing of this system showed it to be working fine, the only oddity was a -16 volt on one side of a 10k resistor used as a bias for the contrast system.
I didn't pass any remarks on this at the time, and proceeded to fit a contrast trimmer to the display itself to make sure the display was OK.
It was, the trimmer was able to make the display perfectly visible from in front, the V2k's visual angle control still worked.
I was just going to install the trimmer permanently and call it job done when dinner beckoned and while enjoying a steak and kidney pie, I had a Eureka moment about the -16V I found earlier, could the power supply be at fault?
It was, I was getting the 5V the DSP's need but +18V and -16V on the rails for the analog parts, this didn't affect the audio but was messing up the contrast system.
I am not used to the idea of switchmode PSU's going out of tolerance, usually they work perfectly or not at all.
I rebuilt the switcher by replacing all the capacitors on the low voltage side of it, using capacitance values from the Motorola Datasheet for the 3844 chip used in the V2k, my theory being that that the 5V rail was struggling to achieve 5V, and thus lifting the other 2 rails.
After the rebuild and test, the voltages on the PSU were 5V and +-12.5 Volts, and the standard contrast was perfect.
The bottom line, if you are techy, try what I did, and if not, try swapping power supplies if you have more than one 2000 type EMU, to confirm the contrast issue is PSU related, and then buy a replacement from EPR.
All the above was done without the aid of any EMU service manual."

Wellicht dat ik dit eens ga bekijken.

 

[marcvang]

Dat zou idd ook een mogelijkheid kunnen zijn, vooral de condensatoren in de voeding kunnen slecht/defect zijn

Slechte kwaliteit condensatoren verouderen ook vaak snel