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Service Guide ML320/ML321
Chapter 3 Maintenance & Disassembly
3.2.06 Control Board
Rev A and B
CAUTION:
Check the contacts between the power interconnect module, the control
board, and the power supply board (Rev A and B units ONLY). Clean the
contacts if dirty. If contacts are bent or broken, replace the module. Proper
inspection and cleaning of the power interconnect module contacts can eliminate
a false diagnosis of a failed control board or power supply board.
Check the contacts and connections of the control board. If good contact is not
made at all connections and ground points, false diagnosis will occur.
Refer to Appendix A (
) for detailed information regarding the differences between
the Rev A, B, C, and D control boards.
Perform these procedures first:
- 3.2.01 (
)
- 3.2.04 (
)
- 3.2.05 (
)
- Turn the locking post (1) 90 degrees clockwise to unlock it.
- Lift the locking claw (2) and pull the control board (3) away from the chassis.
- Tilt the control board 45 degrees and remove it.