No. 20S125-00 9) External switch Switch Circuit Diagram, Tip R1 1.8K R2 3.3K R3 4.7K R4 10K R5 27K 1 2 1 2 1 2 GND SW-A SW-B SW-C SW-D SW-E SW-F 1 2 1 2 1 2 Example SW-A SW-D SW-C SW-E SW-B SW-F STC-HD213DVN-B / STC-HD213SDIN-B Product Specifications and User’s Guide 51/89