laptop 7"



LCD info:
I have choosen this because it's thin (12mm) and very common.
DMTECH PDV871-2(MK II) 7", stereo speakers, video input.
Don't run anywhere and buy one before reading all the work that's
needed to make this display run on the spectrum.


Opening the LCD you see a pcb, this needs some fixes, if you don't do it then every eight line is not shown and you have a aspectratio that's too wide. By putting a 1K resistor you change mode to 'letterbox' and aspectratio is somewhere between 4:3 and 16:9 and all lines are shown. There are 3 trimmer pots that adjusts the picture to the best, only need todo this ones.

Volume, Reverse switch (screen upside down), Headphone, DC in, AV in, Power switch, Brightness.
There is no way having space for the lower part anywhere but inside spectrum.


I have removed Headphone, DC, AV sockets. (pcb won't fit if you leave it there and pcb sits by double adhedsive tape. Sound is unconnected, 3 wires VCC, GND, Video is all that's needed to add.
Leave power switch on, Reverse in normal, brightness adjusted ones.
Other end of VCC is connected to spectrums 9v+ (somewhere around the DC plug)
GND can be connected to where modulator box was, (remove modulator box).
Video is connected to video out on speccy, look at my simple videofix on how to get a videosignal.


If you wan't better colors (less blur) then remove the red wire from socket and connect this to
minus (-) end of CAP C65 (you must solder off this end from speccy board first). Now you have
s-video picture quality.


There is one hinge on the LCD so you only need to do one, as on picture I used 1mm steelplate.
Do this hinge before painting anything and test it so it works as it should.

Make sure no painting is going into electronics or lcd panel.

Paint it with acrylic color for plastic.

Center LCD in position with hingens in place, mark up the holes and remove LCD and drill, what I noticed is that one per side is well enough.

Look in rebuild 48k, your gonna need to do this as well to get spectrum to consume less power.


Final picture of the laptop, battery's, interface... all in place. Klick for a hi-res.
I have used 3 Nokia BLC-5C 3,7V 1020mA battery's in serial, more info in laptop battery link.



This is for thoose that is curios in more details:

Service manual (similair product, same LCD pcb)
If you look carefully enough you will see that s-video and RGB signal input is possible as well, but will need more soldering at a fine level.