Logic Board - Model 003 - IBM 4247 Maintenance Information

Replacement
Follow the removal steps in reverse order.

Logic Board - Model 003

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 124 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.
Attention: The electronic parts of this printer can be damaged by electrostatic discharge (ESD). Use ESD
protection devices and procedures, including a static discharge wrist strap, while working on the printer.
DANGER
To prevent serious personal injury from electrical shock when connecting or disconnecting the interface
cable, set the printer power switch to O (Off) and unplug the power cord.
Chapter 5. Removals and Adjustments
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