5-10
Workstation 4 and 4 LX Field Service Guide
WS4 LX Troubleshooting
Testing the WS4 LX Power Supply and System Board Voltages
Working Voltage Checks - ABRD86 System Board
On a unit where the Standby voltages are present, but it fails to respond to the
power button, the Working domain voltages can be checked as outlined in the next
step. For more information about the Standby and Working power domains on the
WS4 LX system board, see Chapter 4.
2. If the Standby voltages shown in Figure 5-2 are present, but the ABRD86 board is
non-responsive, refer to Figure 5-3, below and check the voltages at the points
indicated
.
Figure 5-3:
Checking the ABRD86 System Board Working Voltages