IBM pSeries 690 Service Manual page 893

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Processor Subsystem DCA (Distributed Converter Assembly) Books

and DCA Blanks

The following safety notice applies to power-related field replaceable units.

Do not attempt to open the covers of the power supply. Power supplies are not serviceable and

are to be replaced as a unit.

1. Locate the DCA to be replaced.

2. Note the state of the DCA LED.

3. Press the green Start Service button on the UEPO switch.

4. Proceed only if all the DCA's LEDs go off or the repair has been scheduled. If the repair has been

scheduled, power off the system as described in "Powering Off and Powering On the System" on page

854, then return here.

5. Loosen the upper and lower fasteners, using the torque tool (part number 6422789), alternating

between the fasteners until the unit can slide out of the slot.

6. Grasp both sides of the DCA and pull it out of the drawer.

1. Carefully slide the DCA into the slot as far as possible (the back edge of the top of the DCA is about

0.25 inch from the cage bracket).

Note: Do not force the DCA against the backplane, as this may damage the connector.

2. Hold the upper part of the DCA against the backplane, and use the torque tool to engage the upper

fastener about two turns into the cage bracket.

3. Repeat the previous step for the lower fastener.

4. Alternate tightening the upper and lower fasteners until both are fully torqued in.

5. Check torque on both fasteners.

6. Plug all cables into their correct location in the DCA.

7. Press the white Service Complete button on the UEPO switch to indicate completion of this

Chapter 9. Removal and Replacement Procedures