190Chapter 7 Section I: Replacement ProceduresCircuit Board: ControllerNOTE: 6400-050, -P50, -010, -P10, -014, -015, -C05, and C5P printers mustuse the 40 MHz CMX controller board.ATTENTIONTo prevent electrostatic damage to electronic components, wear aproperly grounded static wrist strap when handling circuit boards, theshuttle frame assembly, and any other electronic component.Removal1. Make a configuration printout of all configurations. (Refer to theOperator’s Guide.)2. Prepare the printer for maintenance (page 152).3. Cabinet Model: Remove the paper guide assembly (page 229).Pedestal Model: Remove the top cover assembly (page 204).4. Disconnect all cable connectors from the controller board. (See page 264,Figure 47.)5. Loosen, but do not remove, the screws securing the controller shield nearserial cable connector J201.6. Loosen, but do not remove, the screw securing the controller shield to thebottom of the card cage, on the left side near the card cage fan.7. Slide the controller board to left until the keyway clears the screwsecuring the controller board to the bottom of the card cage.8. Remove the controller board.9. Remove the DRAM SIMM, FLASH SIMM, and Security PAL from thecontroller board (page 217). These will be installed on the replacementcontroller board. The Security PAL must be installed on the replacementcontroller board to ensure the printer functions correctly.NOTE: When Flash SIMMs are removed from one controller board andplaced on another controller board, the SIMMs must be placed on thenew board in the same order and location as on the original board.
