Power-Up Sequence; Ac Power-Up Sequence; Dc Power-Up Sequence - Digital Equipment 3300R Service Manual

Power-Up Diagnostics and Display
To activate the FSL:
1. Move the jumper at bank 7 of the J1 jumper on the CPU daughter board. The jumper
is normally installed in the standard boot setting (position 0). Refer to Figure 8-1 in
Chapter 8.
2. Insert the console firmware diskette and turn on the system.
3. Reinstall the console firmware from diskette.
4. Power down and return the J1 jumper to the standard boot setting (position 0).

Power-Up Sequence

During the system power-up sequence, the power supplies are stabilized and the system is
initialized and tested.
The power-up sequence includes the following:
•
Power supply power-up:
AC power-up
DC power-up
•
Two sets of diagnostics:
Serial ROM diagnostics
Console firmware diagnostics

AC Power-Up Sequence

The following power-up sequence occurs when AC power is applied to the system (system
is plugged in) or when electricity is restored after a power outage:
1. The front end of the power supply begins operation and energizes. A minimal set of
remote server management logic is powered off the auxiliary 5V power output.
2. The power supply then waits for the DC power to be enabled.

DC Power-Up Sequence

DC power is applied to the system with the DC On/Off button on the control panel. A
summary of the DC power-up sequence follows:
1. When the DC On/Off button is pressed, the power supply checks for a POK_H
condition.
2. 12V, 5V, 3.3V, and –12V outputs are energized and stabilized. If the outputs do not
come into regulation, the power-up is aborted and the power supply enters the
latching-shutdown mode.
2–24 DIGITAL Server 3300/3300R