IBM 4247-003 Maintenance Manual - Page 378
Replacement, Logic Board - Models 001 and 002, Removal
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3. Disconnect the stacker cable connector from the logic board. Note: Some connectors have retaining clips. 4. Disconnect the operator panel cable connector from the logic board. 5. Disconnect the EMI filter assembly from the operator panel cable connector. Replacement 1. Follow the removal steps in reverse order. 2. Run the T&D program in automatic mode. See "How To Run the Test and Diagnostic (T&D) Programs" on page 161. Perform all tests of T&D05. Logic Board - Models 001 and 002 Logic Board Component Inspection During the logic board removal procedure it is necessary to visually inspect the logic board modules and components for burns, cracks, discolorations, or other indications of damage. If damage is found, use Figure 125 and the Logic Board Component Inspection Reference to identify the damaged driver circuit. Replace the cable and component related to the damaged circuit in addition to the logic board. For example, if you discovered a burned area around the U38 module, you would replace the AFTA motor and the AFTA cable, as well as the logic board. Removal Attention: The electronic parts of this printer can be damaged by electrostatic discharge (ESD). Ensure that ESD protection devices and procedures, including a static discharge wrist strap, are used while working on the printer. Chapter 5. Removals and Adjustments 378