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To access the Model 2089's internal PC boards, insert a small flat-
blade screwdriver between the connector and the lip of the case and
twist gently as shown in Figure 3 (below).
Figure 3. Opening the Model 2089's plastic case with a small screwdriver
Both DIP switch S1 and S2 are marked with individual switch
numbers 1 thru 4. Use these numbers, as well as the "ON" designation
to orient the switch properly (see Figure 4, below). Use a small screw
driver or similar instrument to set each individual switch.
"ON"
"OFF"
Figure 4. Close-up of DIP switches S1 and S2, showing ON/OFF orientation.
ON
1
2
3
5
4
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