Vintage Simmons Drums (UK) Users Group

http://www.maplin.co.uk/supertwist-alphanumeric-lcd-modules-36389#overview

Only one colour it seems now

--- In Simmons_Drums@yahoogroups.com, "WT" <waveterm@...> wrote:
>
> Got a link ?
> 
> WT
> 
> ----- Original Message ----- 
> From: "Mark Frost" <airflamesred@...>
> To: <Simmons_Drums@yahoogroups.com>
> Sent: Tuesday, April 16, 2013 8:39 PM
> Subject: [Simmons Drums] Re: Simmons MTM...
> 
> 
> Excellent info - many thanks. I did purchase one a while ago and might give 
> this another go.
>  For those in the UK, Maplin have a replacement (same screw centres)display 
> in a choice of 3 colours.
> 
> 
> 
> --- In Simmons_Drums@yahoogroups.com, vout@ wrote:
> >
> > Hi,
> >
> > I have installed the new display and it works well, a big improvement. I 
> > had a few small problems when fitting it so I will mention them here -
> >
> > The footprint of the new display (I used) was much smaller vertically than 
> > the original display, so I could not use all the original mounting screws. 
> > I decided to just mount it using the top screws only. This works ok and 
> > the display bottom edge is resting on the lower screws so it does not move 
> > about.
> >
> > One thing about the mounting screws - they are fitted loosely through the 
> > front panel from the front side, but behind the stick-on panel overlay, 
> > which holds them in place. When I was loosening and tightening the 
> > retaining nuts on these screws, I had to apply pressure to the front panel 
> > where the screw heads are to stop them from turning.
> >
> > When I fitted the new display and first powered it up, I realised it was 
> > upside down! - the connections are on the top edge, on the original 
> > display they are on the bottom edge.
> >
> > The connectors on the new display are numbered 1-16, this seems to be a 
> > standardised connection for this type of display. You need to desolder the 
> > ribbon cable from the original display and solder it in the same positions 
> > on the new display (connections 1-14 in exactly the same order as the old 
> > display) This leaves connections 15 & 16 free, which are for the led 
> > backlight (15 is 5v and 16 is ground/0v) You can obtain these voltages 
> > from the main pcb nearby - resistor R7 is connected accross the 5v power 
> > rail so all you have to do is solder a wire to each side of R7 (the end of 
> > R7 nearest to the front panel is +5v) and connect the wires to 15 and 16 
> > on the LCD.
> >
> > If you unplug the LCD ribbon connector from the main board, make a note of 
> > which way round it goes.
> >
> > The LCD contrast needs to be adjusted - there is a small trimmer on the 
> > main pcb just behind the display - I had to turn it fully anticlockwise to 
> > get an acceptable contrast - it is ok now, but could be better. The reason 
> > for this is that the original display uses a negative voltage for contrast 
> > adjustment, but the new one I used needs a positive voltage. I will 
> > probably modify this so it gives the proper range of adjustment, but for 
> > now it is usable as is.
> >
> > Hope that info is of some help if you decide to change the LCD, it is 
> > definitely worthwhile.
> >
> > I will try and get some photos uploaded to the file section soon.
> >
> > Cheers, vout
> >
> >
> > --- In Simmons_Drums@yahoogroups.com, "teknikfourteen" <teknik14@> wrote:
> > >
> > > How is the MTM LCD Display project coming along?
> > > :-)
> > >
> > > Cheers
> > > Teknik14
> > >
> > >
> > > --- In Simmons_Drums@yahoogroups.com, vout@ wrote:
> > > >
> > > > Hi,
> > > >
> > > > I recently bought an MTM and I am also looking to fit a backlit 
> > > > display. The service manual shows that the display is a standard 
> > > > HD44780 controller type - these are available everywhere for a few 
> > > > pounds. There are a couple of things to consider - the mounting holes 
> > > > on most current displays seem to be slightly further apart (1-2mm 
> > > > horizontally) a bit of filing should sort that. Also you need to feed 
> > > > 5v to the backlight - usually pins 15/16 on the display or there may 
> > > > be a separate backlight connection. I've just ordered a cheap display 
> > > > from ebay (£1.50 including delivery!), we'll see how it goes.
> > > >
> > > > Cheers, vout
> > > >
> > > > --- In Simmons_Drums@yahoogroups.com, "teknikfourteen" <teknik14@> 
> > > > wrote:
> > > > >
> > > > > Hi all..
> > > > >
> > > > > Re MTM:
> > > > >
> > > > > I am in the process of cosmetically reconditioning a working MTM:
> > > > >
> > > > > 1. Does anyone know of a suitable replacement part # and source that 
> > > > > would allow replacing the current LCD "dark" display with a new 
> > > > > back-lit one? Some MTM's had back-lit displays, this one does not.
> > > > > Would the display that's available for the Portakit from a Canadian 
> > > > > supplier be suitable?
> > > > > I don't have access to MTM schematics.. :-(
> > > > >
> > > > > 2. Does anyone have dead MTM for sale or parts available? I'm 
> > > > > looking for:
> > > > > - set of Rack Ears
> > > > > - front panel knob for the "Trig out" pot
> > > > >
> > > > > I just had the case stripped and powder coated and the unit looks 
> > > > > fantastic except for the missing knob (bought unit from eBay in this 
> > > > > condition).
> > > > >
> > > > > Cheers :-)
> > > > > Teknik14
> > > > >
> > > >
> > >
> >
> 
> 
> 
> 
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