Page: 44Service Guide OL830Chapter 3 Maintenance & Disassembly3.2.05 Main Controller Board (APSM)1. Remove the upper cover. (See 3.2.01){ }2. Remove the interface board (APSR) if installed. (See 3.2.02){ }3. Remove the RAM board (REXM) if installed. (See 3.2.03){ }4. Remove the emulation board (APSH) (See 3.2.04){ }5. Remove the four screws (1) and remove shield plate B (2).6. Remove the four screws (3),7. Lift the main controller board, disengaging it from the connector (4).P/N 55057901 Main Controller without ROM (APSM)Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business