Chapter 7 Power and Signal Distribution
Compaq Deskpro EX Series of Personal Computers
First Edition - August 2000
7-2
7.1.1 POWER SUPPLY ASSEMBLY
The power supply assembly is contained in a single unit that features a selectable input voltage:
90-132 VAC and 180-264 VAC. Deskpro EX DT systems use a 145-watt supply while Deskpro
EX MT systems employ a 200-watt supply. Tables 7-1 and 7-2 list the specifications of the power
supplies.
Table 7–1. 120-Watt Power Supply Assembly Specifications
Table 7-1.
145-Watt Power Supply Assembly Specifications (P/N 189801)
Range/
Tolerance
Min. Current
Loading [1]
Max.
Current
Surge
Current [2]
Max.
Ripple
Input Line Voltage:
110 VAC Setting
220 VAC Setting
90 - 132
VAC
180-264
VAC
--
--
--
--
--
--
--
--
Line Frequency 47 - 63 Hz -- -- -- --
Steady State Input (VAC) Current -- -- 4.0 A -- --
+3.3 VDC Output +/- 5% 0.00 A 10.0 A 10.0 A 50 mV
+5 VDC Output +/- 5 % 1.30 A 15.0 A 15.0 A 50 mV
+5 AUX Output +/- 4 % 0.00 A 2.00 A 2.00 A 50 mV
+12 VDC Output +/- 5 % 0.10 A 4.00 A 5.00 A 120 mV
-12 VDC Output +/- 10 % 0.00 A 0.30 A 0.40 A 200 mV
NOTE: Desktop units are specified as 120-watt systems even though a 145-watt
power supply is used.
Table 7–2. 200-Watt Power Supply Assembly Specifications
Table 7-2.
200-Watt Power Supply Assembly Specifications (P/N 190769)
Range/
Tolerance
Min. Current
Loading [1]
Max.
Current
Surge
Current [2]
Max.
Ripple
Input Line Voltage:
110 VAC Setting
220 VAC Setting
90 - 132
VAC
180-264
VAC
--
--
--
--
--
--
--
--
Line Frequency 47 - 63 Hz -- -- -- --
Steady State Input (VAC) Current -- -- 6.00 A -- --
+3.3 VDC Output +/- 4% 1.40 A 14.0 A 14.0 A 50 mV
+5 VDC Output +/- 5 % 1.40 A 22.0 A 22.0 A 50 mV
+5 AUX Output +/- 4 % 0.10 A 2.00 A 2.00 A 50 mV
+12 VDC Output +/- 5 % 0.07 A 6.00 A 8.00 A 120 mV
-12 VDC Output +/- 10 % 0.00 A 0.30 A 0.30 A 200 mV