Micros Systems Workstation 5 Service Manual page 86

Workstation 5 Troubleshooting
Checking the Power Supply and System Board Voltages
VCC5
o
If both
3. If
VCC3
8. When VCC5 goes active, this enables the switch consisting of Q22 and
Q25, enabling
4. Check
For System Boards with AMD ALXC800EETJCVD CPU, VCORE
o
should be +1.20V
For System Boards with the AMD ALXC800EEXJCVD CPU,
o
VCORE should be +1.25V.
3-18
is available at Pin-4.
and are not present, but
VCC3 VCC5
and is available, you can check
VCC5
.
VCC12
at L3 and TC25. (Not shown in the illustration)
VCORE
is low, suspect U38.
PS_ON#
at Q22 pins 5 through
VCC12
Workstation 5 Field Service Guide