DEC 4000 600 series, Owner'S Manual, Page: 204 / 242

Power Problems
Table 9–5 (Cont.) Interpreting Power Supply Lights
Light Meaning Action on Error
DC-DC Converter (DC3)
DC3 OK When on, indicates that all of the output
voltages are within specified tolerances.
DC3 Failure When on, indicates that one of the output
voltages is outside specified tolerances. Call Digital Services.
DC-DC Converter (DC5)
DC5 OK When on, indicates the 5 V output voltage
is within specified tolerances.
DC5 Failure When on, indicates the 5 V output voltage
is outside specified tolerances. Call Digital Services.
Problems Getting to Console Mode
Pre-Console
Mode Problems
This section describes how to troubleshoot the system when you
power up the system, but the console terminal does not display
on the power-up screen.
• Table 9–6 describes possible problems when getting to
console mode and their solutions.
• Table 9–7 explains how to interpret the lights on the operator
control panel.
9–8 Troubleshooting the System