Service manual

Revision 2/18/05 3 - 23
Hardware Description
Non-Isolated Power Strip
For Unibody cart-based systems without an Iso Box,
VIASYS provides a medical grade power strip.
Computer Power Supply
The D865GLC Halyron desktop platform uses a 180W
ATX power supply with auxiliary power (+5V, +3.3V)
and ATX+12V connectors.
Field Adjustments/Maintenance
Periodically verify the power supply fan is operating
normally. Remove any dust at the ventilation holes, as
needed. The computer power supply has no field
adjustable parts.
Testing
1. Check for the following voltages at the power
supply main connector on the CPU motherboard.
2. Check for the following voltages on the disk drive
connectors.
Removal/Replacement
Removing the power supply from D865LC computer
chassis is a tedious process, due to the tight packing of
components within the computer chassis, and the
location of a reinforcement bar close to the power
supply. Before removing the power supply, it is
necessary to remove virtually all LRUs, including the
computer motherboard and rear panel fan, from the
computer chassis.
ATX Power Supply
Measure Test Point
+3.3V J1 pins 1, 2, 11 Orange
+5V ±0.50V J1 pins 4, 6, 19, 20 Red
-5V ± 0.25V J1 pin 18 White
+12V ± 0.60V J1 pin 10 Yellow
-12V ±0.60V J1 pin 12 Blue
GND J1 pins 3, 5, 7, 13, 15-17 Black
Measure Test Point
+5V ±0.50V Red
+12V ±0.60V Yellow
GND Black