DC Power Distribution Board

Vertical PDB 501-7951

Notes

1. PDB <= 501-7697-05 may cause intermittant DVD operation.
2. PDB 501-7697-06 changes firmware reset timing for proper DVD operation.
3. Access to the Sun Fire X4250 System Board busbar screws is blocked by the CPU0 Heatsink.
   Removal of the CPU0 Heatsink during the PDB replacement procedure is required.
   Clean and re-grease the Heatsink with Thermal Grease Kit F350-1271-01.
   The kit includes Cleaning Wipe 250-1802 and ShinEtsu X23-7783D Thermal Grease syringe 310-0065.
   The kit is not included with the PDB.
4. PDB 511-1603 only supports a SATA DVD. A PATA DVD is not supported.