Chapter2 SystemSetup 23Note: You may change the jumper settings for RS-232/422/485 before installing the PCM-5821 and I/O adapter2.7 PCM-5821 and I/O Adapter ReplacementTo replace or service the PCM-5821 (the all-in-one CPU board) and I/Oadapter, complete the following steps:1. Turn off the power to the PPC-1052. Remove the rear protective cover (see Figure 2-1)3. Install the PCM-5821 in the panel and screw in the eight screws (seeFigure 2-4)4. When the PCM-5821 is mounted in the panel, plug and press theadapter into the socket (see Figure 2-4))5. Some screws on your left hand side connect the I/O adapter to thePC, and also connect the adapter to the PCM-5821. Screw the screwsinto the panel.Figure 2-4: Installing/removing the PCM-5821 and I/O adapterin the PPC-105
