Digital Equipment FR-902AA-A3, Service Maintenance Manual

Page: 50 / 86

Service Procedures Digital STARION 400i - 900i PC
50 MCS Logistics Engineering - Nijmegen
Installing the CPU Voltage Regulator
The Starion Minitower PC computer's CPU requires a separate voltage regulator in order to operate
correctly. If a new CPU is installed, a new voltage regulator might also be required. If this is the case, the
new voltage regulator will be included in the CPU upgrade kit.
To install the voltage regulator:
1) Turn off the computer, disconnect external devices, ac power and monitor power.
2) Unlock and remove cover.
3) Carefully pinch the harpoon ends on the plastic standoffs and remove the voltage regulator.
4) Install new voltage regulator. Make sure socket on voltage regulator is aligned with pins on main
logic board connector.
5) Align standoffs with holes in voltage regulator circuit card and carefully press down on voltage
regulator until socket is fully seated and standoffs have secured circuit card.
6) Replace and lock cover and connect external devices and restore power.
DEC00508-3
Figure 3 - 14 Installing the CPU Voltage Regulator