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1-20 Dell PowerEdge 4200 Systems Service Manual
System Cooling
The Dell PowerEdge 4200 system contains three redundant cooling fans in the
left side of the chassis. Two of the fans are used to cool the system, and the
remaining fan is activated only in the event of the failure of one of the two pri-
mary fans or in the event of an over-temperature condition in the chassis.
Additionally, a fourth cooling fan is installed in the upper power supply bay in
systems equipped with only one power supply.
Cooling Fan Connectors
Up to four fans attach to the system board via fan connectors (see Figure 1-16).
Power supplies containing fans supply the +12 V power for their respective fans
directly.
System Board Layout
The subsections that follow provide service-related information about the sys-
tem board components. Figure 1-18 shows the main features of the system
board.
Figure 1-18. System Board Components
video connector (JVGA)
parallel port
connector (PARALLEL)
serial port connector (SERIAL2)
serial port connector (SERIAL1)
mouse connector (MOUSE)
keyboard connector (KYBD)
diskette-drive interface
connector (FLOPPY)
secondary
microprocessor
guide bracket
assembly and
connector (PROC_2)
battery connector (BATTERY)
Ultra/Narrow SCSI host
adapter connector
(SCSI2 CD-ROM)
Ultra/Wide SCSI host adapter
connector (BACKPLANE SCSI1)
server-management bus
connector (SMB BACKPLANE)
server-management serial
port connector (REMOTE)
DIMM sockets
(DIMM_A [top]–DIMM_H)
speed and configuration
jumpers
fan connectors (3)
(FAN1–FAN3)
front of system board
primary microprocessor
guide bracket assembly
and connector (PROC_1)
EISA connectors
(EISA1 [top],
EISA2, and EISA3)
PCI connectors
(PCI4 [top] through PCI8)
secondary microprocessor
temperature sensor (TEMP_2)
intrusion alarm
connector (INTRUSION)
primary microprocessor
temperature sensor
(TEMP_1)
fan connector (FAN5)
fan connector
(FAN4)
external server-management
bus connector (SMB EXTERNAL)
power input connector
(POWER1)
power input connector
(POWER2)
power input connector
(POWER3)