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Technical Overview

Dell™ Dimension™ 4300S

  Internal View

  System Board Connectors and Sockets

  Socketed Microprocessor

  Power Supply

  DC Power Connectors

Internal View

CAUTION: Before you begin any of the procedures in this section, read "Safety Instructions."

NOTICE: Be careful when opening the computer cover to ensure that you do not inadvertently disconnect cables from the system board.

System Board Connectors and Sockets

Socketed Microprocessor

The 478-pin, socketed Intel® Pentium® 4 microprocessor, shown above with the heat sink and fan attached, contains an integrated 8-KB primary (L1) cache with a secondary (L2) 256-KB Advanced Transfer Cache that resides in the processor's core and runs at the processor's internal clock speed.

The socketed microprocessor inserts into the ZIF connector mounted on the system board. A clip secures the heat sink to the connector.

Power Supply

The 180-W power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz. The power supply provides the DC operating voltages and currents listed in the following table.

Output Voltage1	Regulation	Minimum Current (A)	Maximum Current (A)2
+12 VDC	+/–5%	0.0	10.0
+5 VDC	+/–5%	1.0/0.23	12.0
+3.3 VDC	+/–5%	0.1/0.04	10.0
–12 VDC	+/–10%	0.0	0.5
+5 VFP	+/–5%	0.0	2.0
1Outputs meet and do not exceed SELV requirements per electrical standards (UL 1950, IEC 950, or EN60950 Par. 2.3). 2Maximum continuous combined load on +5 VDC and +3.3 VDC outputs do not exceed 80 W. 3+5 VDC minimum load is 0.2 A when there is a minimum load of 0.3 A on the +12 VDC and 0.42 A on the +3.3 VDC outputs simultaneously. +5 V minimum load is 1 A for load transient tests. 4In system configurations where +3.3 VDC is not used, all other outputs stay within regulation while the +3.3 VDC output is in a zero load condition.

DC Power Connectors

Power Supply DC Connector Pin Assignments

DC Power Connector P1

Pin Number	Signal name	18-AWG Wire
1	+3.3 VDC	Orange
2	+3.3 VDC	Orange
3	COM	Black
4	+5 VDC	Red
5	COM	Black
6	+5 VDC	Red
7	COM	Black
8	POK1	Gray
9	+5 VFP	Purple
10	+12 VDC	Yellow
11	+3.3 VDC	Orange
12	–12 VDC1	Blue
13	COM	Black
14	PS ON1	Green
15	COM	Black
16	COM	Black
17	COM	Black
18	N/C	N/C
19	+5 VDC	Red
20	+5 VDC	Red
1Use 22-AWG wire instead of 18-AWG wire

DC Power Connector P6

Pin Number	Signal Name	18-AWG Wire
1	COM	Black
2	COM	Black
3	+12 VDC	Yellow
4	+12 VDC	Yellow

DC Power Connectors P2, P3, and P4

Pin Number	Signal Name	18-AWG Wire
1	+12 VDC	Yellow
2	COM	Black
3	COM	Black
4	+5 VDC	Red

DC Power Connector P5

Pin Number	Signal Name	22-AWG Wire
1	+5 VDC	Red
2	COM	Black
3	COM	Black
4	+12 VDC	Yellow

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