Dell Dimension C521 Service Manual

card size
low profile
connector size
124 pins
connector data width
(maximum)
32 bits
PCI Express:
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connectors
one x1 and one x16
power
10 W (x1) and 25 W (x16) maximum
connector size
36 pins (x1) and 164 pins (x16)
connector data width (maximum)
one PCI Express lane (x1) and 16 PCI Express lanes
(x16)
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Drives
Externally accessible
one 3.5-inch drive
one 5.25-inch drive bay
Available devices
SATA hard drive, CD drive, DVD drive, DVD +/- RW
drive, and CD-RW/DVD Combo drive
Internally accessible
one bay for a 1-inch-high hard drive
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Connectors
External connectors:
Video
15-hole VGA connector
Network adapter
RJ45 connector
USB
two front-panel and four back-panel USB 2.0–
compliant connectors
Audio
six connectors for line-in and line-out; two front-panel
connectors for headphones and microphone
System board connectors:
SATA
two 7-pin connectors
Floppy drive
34-pin connector
Fan
5-pin connector
PCI 2.3
124-pin connector
PCIe-x1
36-pin connector
PCIe-x16
164-pin connector
Internal USB
10-pin connector (supports two USB ports)
Speaker
6-pin connector
Memory modules
four 240-pin connectors
Power 12V
4-pin connector
Power
24-pin connector
Battery
2-pin socket
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Controls and Lights
Power control
push button
Power light
green light — Blinking green indicates a sleep mode;
solid green indicates a power-on state.
amber light — Blinking amber indicates a problem
with an installed device; solid amber indicates an
internal power problem (see System Lights).
Hard-drive access light
green
LAN activity light (front panel)
solid green light indicates network connection
Link integrity light (on integrated network adapter)
green light for 10-Mb operation; orange light for 100-
Mb operation
Network activity light (on integrated network
adapter)
yellow blinking light
Diagnostic lights
Four lights on the front panel. See Diagnostic Lights.
Standby power light
AUX_PWR on the system board
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Dell Dimension C521 Specifications

General

Brand	Dell
Model	Dimension C521
Category	Desktop
Language	English