ADA Depot - A Forum To Support Users of ADA Amplification Gear
ADA Preamps => MP-2 => Topic started by: rnolan on March 21, 2016, 06:28:13 PM
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Seems over time the MP2 display fades, this has happened to my original MP2 and as far as I know there is no adjustment for it so I bought a replacement from MJMP (http://www.marshalljmpmodshop.net/miscellaneous_parts_and_replacement_tubes.htm) for 21 euro thingies. I still haven' installed it, that MP2 is in my live rig and I rarely need to see the display so I don't know how difficult it is to replace (MJMP?). Anyway Tomy just asked me about this so I thought I'd post here for others to see also.
Cheers R
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Hey everybody, I must clarify that some of gear is still working anyway :lol:
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I replaced mine a while back, it was relatively easy to do. Some plastic clips hold it in place and you just plug in a big flat cannon plug thingy full of wires.
I have a spare, that I have not installed yet (thank you Adam!)
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A cannon plug??
Like Dante says,not so hard to install,unplug it,desolder the ground wire (easy to do) replace it,re plug it and solder the wire back and you're done.
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I said flat. :)
Cannon plugs are round, it's flat, I was struggling for a word :facepalm:
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I replaced my one a couple of years ago ... but why do the original displays begin to fade?
Perhaps my memory is a bit fuzzy, but I seem to remember seeing an MP-2 with a different colour display, blue I think?
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Hi everybody, Maybe we did not identify symptoms of a dead display screen ; In my case,when I'm standing right in front of my mp2,screen is green with black squares, and if I move upper, It's fine... :dunno:
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Definitely time for a new one :thumb-up: My original MP2 screen is a bit like that, not quite as bad yet but going that way.
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Hope the next screen will have TV on :lol:
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Hope the next screen will have TV on :lol:
You could watch Neighbours, Home and Away, and play a gig, all at the same time :whoohoo!:
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I said flat. :)
Cannon plugs are round, it's flat, I was struggling for a word :facepalm:
Aaaaah was thinking a cannon plug,how the hell he did this work ;)
Usually the screens still works,it's the backlight that starts to fail after a while.
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Hope the next screen will have TV on :lol:
You could watch Neighbours, Home and Away, and play a gig, all at the same time :whoohoo!:
or watching p*rn during gig !
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So here we go :
-first pix in front of
-second from above
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In my case,when I'm standing right in front of my mp2,screen is green with black squares, and if I move upper, It's fine...
Yup, that's what happened to mine. MJMP sent me a replacement he found. It has one funky character instead of the arrow, but other than that, it's fine. Adam McClean sent me his BLUE display some time ago, I have yet to install it in my MP-2.
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Hi everybody, Maybe we did not identify symptoms of a dead display screen ; In my case,when I'm standing right in front of my mp2,screen is green with black squares, and if I move upper, It's fine... :dunno:
That's not a dead screen,but a contrast problem.Could be the lcd or the cable.Try to pull out the grey cable on both ends and put it back in.Maybe a bad contact.
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In my case,when I'm standing right in front of my mp2,screen is green with black squares, and if I move upper, It's fine...
Yup, that's what happened to mine. MJMP sent me a replacement he found. It has one funky character instead of the arrow, but other than that, it's fine. Adam McClean sent me his BLUE display some time ago, I have yet to install it in my MP-2.
aha ... so there was a blue display ... does anyone know how this was done please? Which is probably my way of asking ... where can I get one from?
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Ok, I open my mp2, unplegged the whole thing, try to clean connector as best as I can... still the same !
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I know these particular style of displays have some kind of adjustment located in a menu to optimize the light/dark which actually seems to be all about the viewing angle. I've seen it on other things, but I don't recall ever seeing that menu on the MP-2. :(
If you are seeing blocks instead of characters, try looking at the display from different up/down angles. If you find a clear view, it's probably just that adjustment needed. But is there an actual adjustment available in an MP-2 menu somewhere that I'm not aware of?
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Hi Kim, if you take a look closer to the pix, I also have an sgx ; it's just easy to find, setting menu and you get the adjustement(and you are right, It's called "angle display") without manual, but I didn't find for mp2 :dunno:
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The mp-2 has a fixed LCD contrast.
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There's no adjustment in the MP2 menus, as MJMP says it's fixed. Now a blue display is slightly inviting, though I don't mind the green just as long as I can read it when I need to. Basically, they go off over time, the fix is put in a new one when it becomes so bad you can't see enough anymore, but by then you've probably got it programmed and it matters less...
Unless you do what I just did documenting the factory presets for Soloist... I rarely look at the display of my live MP2 so it's not a big deal.
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Well Yes Richard, It's just about confort. I was, first of all, asking if it could be ajustable and if someone else experiment that, with our gear getting older this is the kind of issues we are going in front of
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Hey tg, yeah the display in my original MP2 is slowly fading, it's not unusable but it's going off... It hasn't been a big issue as I don't need to see it much, but when I do (sometimes need to see it, it's a pain). I have a new display, just haven't put it in yet, I'm also poised to do the noise mod (21 caps and the 913 resistor..).
I don't know of any other way to fix it besides change out the display, there isn't any menu option to help (unfortunately), is there a possible mod ???? to change contrast ???
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You know I just ordered to Mj a New display + noise mod ;),s soI'll let you know
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Most LCD's have a contrast pin and you can hookup a pot to regulate the contrast.Ada didn't do this and grounded this pin,so you get a fixed contrast.
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Most LCD's have a contrast pin and you can hookup a pot to regulate the contrast.Ada didn't do this and grounded this pin,so you get a fixed contrast.
OR NOT ! without instructions, I can f#@$ed the whole thing up ! ;D
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Does grounding the pin set it at Max contrast ? In which case putting in a pot would just make it dimmer ?
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Well that's a very good question.
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Did some digging around and it seems it's a bit depending who makes them.
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Interesting... so the ones you get, what do they do ?, this is a bit academic BTW, basically you need to be able to read the display, even faded in my original MP2 it's still usable (so far) but I have a replacement ready to go (thanks MJMP :whoohoo!: )
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Well the ones i sell work fine when you ground the pin.Problem is they are obsolete now so i'm searching for a replacement and i found one from another company but if you ground the pin (contrast) you can't read it.This one needs 1.2V to get a good contrast.So i will need to modify it so it will work and i have a 1/1 replacement.
I was thinking of putting a pot somewhere but i gave up after 5 hours of figuring out.
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Hey MJ, which pin do you ground ? :dunno:
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The contrast pin.
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you mean the contrast pin... and Bob's my uncle ?
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Ah you have an uncle called Bob? ;D
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Argh... You (really) got me ! Anyway, i've tried to locate the contrast pin...better go tiling
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Well the ones i sell work fine when you ground the pin.Problem is they are obsolete now so i'm searching for a replacement and i found one from another company but if you ground the pin (contrast) you can't read it.This one needs 1.2V to get a good contrast.So i will need to modify it so it will work and i have a 1/1 replacement.
I was thinking of putting a pot somewhere but i gave up after 5 hours of figuring out.
I give up looking for my pot way quicker than 5 hours
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I was thinking of putting a pot somewhere but i gave up after 5 hours of figuring out.
There's not much spare real estate in a MP2
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Nope there is not,and the pot is not so important,once set.So it's not worth the trouble actually.
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Nope there is not,and the pot is not so important,once set.So it's not worth the trouble actually.
+1 :thumb-up:
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Well the ones i sell work fine when you ground the pin.Problem is they are obsolete now so i'm searching for a replacement and i found one from another company but if you ground the pin (contrast) you can't read it.This one needs 1.2V to get a good contrast.So i will need to modify it so it will work and i have a 1/1 replacement.
I was thinking of putting a pot somewhere but i gave up after 5 hours of figuring out.
I give up looking for my pot way quicker than 5 hours
:lol:
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I think I know what you're saying ...
hour 1 - look in all the obvious places
hour 2 - look in all the less obvious places
hour 3 - phone your friends for clues (especially the practical jokers)
hour 4 - blame the missus for over enthusiastic tidying
hour 5 - question own sanity, did I really smoke it all?
But all is not lost ...
hour 6 - it's right in front of you on the lounge table, and it hasn't moved from where you left it the night before :facepalm:
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hi everybody, So I guess the only way to fix your mp2 screen is.... replacing it ! now can watch it from everywhere below, above, to the left and to the right !
In fact, it's only unreadable when mp2 is off, and that's fine 'cause at that time ... I don't need it !
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In fact, it's only unreadable when mp2 is off, and that's fine 'cause at that time ... I don't need it !
Great quote :lol:
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In fact, it's only unreadable when mp2 is off, and that's fine 'cause at that time ... I don't need it !
Great quote :lol:
:thumb-up: It ain't rocket surgery