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Dell OptiPlex NX Service Manual - Page 162

SEC Cartridge/Heat Sink Removal

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Microprocessor To take advantage of future options in processor speed and functionality, you can replace the microprocessor on your system board with any Dell-supported microprocessor upgrade. The microprocessor upgrade kit is shipped with an SEC cartridge/heat sink assembly which includes the microprocessor, microprocessor heat sink, and L2-cache memory module. You may also have to reseat or replace an SEC cartridge/heat sink assembly during normal maintenance. SEC Cartridge/Heat Sink Assembly SEC cartridge release latches (2) heat sink SEC cartridge heat sink clips (2) guide bracket assembly metal standoffs (2) Figure 7-14. SEC Cartridge/Heat Sink Removal To remove the SEC cartridge/heat sink assembly, follow these steps: 1. Remove the system power supply. WARNING: The SEC cartridge/heat sink assembly can get extremely hot during system operations. Be sure that the assembly has had sufficient time to cool before touching it. 7-14 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual

Section	Page
Contents	3
System Overview	13
Chassis Differences	14
Chassis Similarities	15
Standard Features	15
Pentium II Microprocessor	15
Secondary L2 Cache	15
Main Memory	16
Upgradable BIOS in Flash Memory	16
EIDE Subsystem	16
SMART Technology	16
Built-In Diskette/Tape Drive Controller	16
Built-In SVGA Subsystem	17
Built-In Audio Controller	17
Built-In Ethernet NIC Support (Optional on EM Syst...	17
Network Cable Requirements	18
Full Set of I/O Ports	18
Universal Power Supply	19
Location of Major Components	19
Advanced Expansion Features	23
OptiPlex NX Computer’s Expansion-Card Slot	24
Low-Profile Computer’s Expansion-Card Slots	24
Midsize Computer’s Expansion-Card Slots	25
Mini Tower Computer’s Expansion-Card Slots	26
Upgrade Options	28
Microprocessor/L2 Cache Upgrades	28
Main Memory Expansion	28
Video-Memory Upgrade Option	28
Computer Service Information	28
Remote Management Support Features (Optional)	28
Online Documentation	29
System Diagnostics	29
System-Board Service Data	29
System Board	29
System Board Jumpers	31
Interrupt Assignments	32
DMA Channel Assignments	33
Hard-Disk Drive Service Information	34
Hard-Disk Drive for the Net PC Computer	34
Hard-Disk Drive for the Low-Profile Computer	35
Hard-Disk Drive for the Midsize Computer	35
Hard-Disk Drive for the Mini Tower Computer	35
Power-Supply Service Data	35
Pin Assignments for the DC Power Connectors	37
DC Power Distribution	38
OptiPlex NX Computer Power Supply	44
OptiPlex NX Pin Assignments for the DC Power Conne...	45
DC Power Distribution for the OptiPlex NX	46
Technical Specifications	48
Basic Troubleshooting	55
Initial User Contact	55
External Visual Inspection	56
Observing the Boot Routine	57
Internal Visual Inspection	58
Eliminating Resource Conflicts	60
Running Computer Diagnostics	60
Server-Based Diagnostics (EM System Board Only)	60
Hard-Disk–Based Diagnostics (Net PC Systems Only)	61
Diskette-Based Diagnostics	63
Connecting an External Diskette Drive to the NX Co...	63
Running the Diskette-Based Diagnostics	64
Getting Help	65
Beep Codes and Error Messages	67
POST Beep Codes	67
System Error Messages	69
Removing and Replacing Parts on the Low-Profile Ch...	75
Recommended Tools	75
Precautionary Measures	76
Inside the Computer	77
Computer Cover	78
Eject, Power, and Reset Buttons	79
Front-Panel Inserts	80
Control Panel	81
Drives	82
3.5-Inch Diskette Drive Assembly	83
5.25-Inch Drive Assembly	84
Hard-Disk Drive Assembly	85
System Power Supply	86
Expansion Cards	87
Expansion-Card Cage	87
Expansion Card	88
Riser Board	89
System Board	90
System Board Components	91
DIMMs	92
Video Memory	92
Microprocessor	94
SEC Cartridge/Heat Sink Assembly	94
System Battery	95
Removing and Replacing Parts on the Midsize Chassi...	97
Recommended Tools	97
Precautionary Measures	98
Inside the Computer	99
Floor Stand	100
Computer Cover	101
Eject, Power, and Reset Buttons	102
Front-Panel Inserts	103
Control Panel	104
Drives	105
Externally Accessible Drive Assemblies	106
3.5-Inch Diskette Drive Assembly	106
5.25-Inch Drive Assembly	107
Hard-Disk Drive Bracket	108
Hard-Disk Drive	109
System Power Supply	110
Expansion Cards	111
Expansion-Card Cage	111
Expansion Card	112
Riser Board	113
System Board	114
System Board Components	115
DIMMs	116
Video Memory	116
Microprocessor	118
SEC Cartridge/Heat Sink Assembly	118
System Battery	119
Removing and Replacing Parts on the Mini Tower Cha...	121
Recommended Tools	121
Precautionary Measures	122
Inside the Computer	123
Computer Cover	124
Front Bezel	125
Eject, Power, and Reset Buttons	126
Front-Panel Inserts	127
Control Panel	129
Drives	130
Externally Accessible Drive Assemblies	130
3.5-Inch Diskette Drive Assembly	131
5.25-Inch Drive Assembly	133
Hard-Disk Drive Bracket	135
Hard-Disk Drive	136
System Power Supply	137
Expansion Cards	138
Expansion-Card Cage	138
Expansion Card	139
Riser Board	140
System Board	141
System Board Components	142
DIMMs	143
Video Memory	143
Microprocessor	145
SEC Cartridge/Heat Sink Assembly	145
System Battery	146
Removing and Replacing Parts on the Net PC Chassis...	149
Recommended Tools	149
Precautionary Measures	150
Stand for Vertical Orientation	150
Computer Cover	151
Control Panel	153
Hard-Disk Drive	154
System Power Supply	155
System Board Components	156
Expansion-Card Cage	156
Expansion Card	158
Riser Board	159
DIMMs	160
Video Memory	160
Microprocessor	162
SEC Cartridge/Heat Sink Assembly	162
System Board	163
System Battery	164
System Setup Program	167
System Setup Screens	168
Index	173
Numbers	173
A	173
B	173
C	173
D	174
E	175
F	176
H	176
I	176
J	176
K	176
M	176
N	177
O	177
P	177
R	178
S	178
T	179
U	179
V	179