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Replacing the control card
1.
Remove the rear cover. See "Replacing the rear cover" on page 22.
2.
Remove the screw labeled
3.
Open the cover. Disconnect the cables of two sheets for the membrane
control card 3.
4.
Remove the four screws labeled 5. Remove the control card 3.
Reverse the procedure to reassemble.
Dip Switch Setting
Before you replace the control card, please check the Dip Switch (S1)
On
Off
POS Keyboard Model
4685-K03
4685-K02
Replacing the MSR
1.
Remove the rear cover. See "Replacing the rear cover" on page 22.
2.
Remove the two screws labeled
3.
Disconnect the cable leading to the control card. Remove the MSR 1.
Reverse the procedure to reassemble.
2
which holds the ground cable
4
6
1
2
3
1
Off
Off
2
which hold the MSR
1
and the cover.
5
2
3
4
2
3
On
On
Off
Off
1
in place.
4
and the other connectors from the
1
6
setting on the control card.
4
Off
On
Chapter 5 Maintenance of the keyboard
25
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