Instruction manual

To Exchange the Switch Card Assembly
The diagrams in the following instructions show a 2104 Model DU3. The steps for
exchanging the switch card assembly in a 2104 Model TU3 are the same, but the parts
are turned through 90 degrees.
1. Unscrew the thumbscrew1 on the failing switch card assembly.
Figure 62. Unscrewing the Thumbscrew on the Switch Card Assembly
74 2104 Models DU3 and TU3 Operator’s Guide