Replacing the control card
1. Remove the rear cover. See “Replacing the rear cover” on page 22.
2. Remove the screw labeled 2 which holds the ground cable 1 and the cover.
3. Open the cover. Disconnect the cables of two sheets for the membrane 4 and the other connectors from the
control card 3.
4. Remove the four screws labeled 5. Remove the control card 3.
Reverse the procedure to reassemble.
5
2
3
4
6
1
Dip Switch Setting
Before you replace the control card, please check the Dip Switch (S1) 6 setting on the control card.
On
Of
f
1234
POS Keyboard Model 1 2 3 4
4685-K03 Of
f
On On Of
f
4685-K02 Of
f
Of
f
Of
f
On
Replacing the MSR
1. Remove the rear cover. See “Replacing the rear cover” on page 22.
2. Remove the two screws labeled 2 which hold the MSR 1 in place.
3. Disconnect the cable leading to the control card. Remove the MSR 1.
Reverse the procedure to reassemble.
Chapter 5 Maintenance of the keyboard 25