Alphasmart 3000 Инструкции по сборке - Страница 2

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If you want to have a lock switch that lets you lock the On/Off key so it doesn't get

pressed accidentally, solder the DIP switch in the rectangle between the spaces

labelled On/Off and File 1 in the top left corner of the front of the PCB, the side

with silkscreen printing.

If you don't want to have a lock switch, find the jumper pads in the top right corner

of the unmarked back of the PCB and bridge them with a small blob of solder.

Place the connectors in pads on the back of

the PCB so that their mouths are facing

away from the center, making sure all the

pins get through. Be careful when soldering

them that you don't bridge the pins.

Carefully but firmly insert the 10-pin cable

in the corresponding connector so that its

pins face away from the PCB. Raise the latch

Fig. 2

on the 16-pin connecter, out, then upward,

and insert the 16-pin cable so its pins face towards the PCB. Close the latch and

make sure the cables aren't liable to fall out. At this point, if you wish to test the

board, skip ahead to Installing the Keyboard. You can test the key sockets by

bridging the pads with a piece of wire or metal tweezers.

Place the switches in the holes on the front of the PCB, checking each one to make

sure the pins went through without bending. The pins of MX- and Alps-style

switches should be oriented towards the top, and those of Choc switches towards

the bottom. If you are using MX- or Alps-style switches, it's recommended that you