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NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components. 1. Follow the procedures in "Before You Begin." 2. If you have installed a security cable, remove it from the security cable slot. NOTICE: Ensure that sufficient space exists to support the removed cover—at least 30 cm (1 ft) of desk top space. NOTICE: Ensure that you are working on a level, protected surface to avoid scratching either the computer or the surface on which it is resting. 3. Lay your computer on its side with the computer cover facing up. 4. Pull back the cover latch release on the top panel. 5. Locate the three hinge tabs on the bottom edge of the computer. 6. Grip the sides of the computer cover and pivot the cover up. 7. Lift the cover away and set it aside in a secure location. Back to Contents Page Back to Contents Page Technical Overview Dell™ Dimension™ 9150 Service Manual Inside View of Your Computer System Board Components Power Supply DC Connector Pin Assignments Inside View of Your Computer CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. System Board Components Power Supply DC Connector Pin Assignments DC Power Connector P1 Pin Number Signal Name Color Wire Gauge 1 +3.3 VDC Orange 18-AWG 2 +3.3 VDC Orange 18-AWG 3 COM Black 18-AWG 4 +5 VDC Red 18-AWG 5 COM Black 18-AWG 6 +5 VDC Red 18-AWG 7 COM Black 18-AWG 8 POK Gray 18-AWG 9 +5 VFP Purple 18-AWG 10 +12 VB DC White 18-AWG 11 +12VB DC White 18-AWG 12 +3.3 VDC Orange 18-AWG 13 +3.3 VDC Orange 18-AWG 14 -12 VDC Blue 18-AWG 15 COM Black 18-AWG 16 PS-ON Green 18-AWG 17 COM Black 18-AWG 18 COM Black 18-AWG 19 COM Black 18-AWG 20 N/C N/C 18-AWG 21 +5 VDC Red 18-AWG 22 +5 VDC Red 18-AWG 23 +5 VDC Red 18-AWG 24 COM Black 18-AWG DC Power Connector P2 Pin Number Signal Name 18-AWG Wire 1 COM Black 2 COM Black 3 +12 VA DC Yellow 4 +12 VA DC Yellow DC Power Connect P3 and P5 Pin Number Signal Name 18-AWG Wire 1 +3.3 VDC Orange 2 COM Black 3 +5 VDC Red 4 COM Black 5 +12 VB DC White DC Power Connector P4 Pin Number Signal Name 18-AWG Wire 1 N/C N/C 2 COM Black 3 COM Black 4 +3.3 VDC Orange 5 +5 VDC Red 6 +12A VDC Yellow DC Power Connector P7 Pin Number Signal Name 18-AWG Wire 1 +5 VDC Red 2 COM Black 3 COM Black 4 +12 A VDC Yellow DC Power Connectors P8, P9, and P10 Pin Number Signal Name 18-AWG Wire 1 +12 VA DC Yellow 2 COM Black 3 COM Black 4 +5V DC Red NOTE: The P10 connector is intended for use with PCI Express graphics cards that have power requirements exceeding 75 watts. DC Power Connector P11 Pin Number Signal Name 18-AWG Wire 1 +12 VB DC White 2 COM Black 3 COM Black 4 +5V DC Red DC Power Connector P12 Pin Number Signal Name 18-AWG Wire 1 +12 B VDC White 2 +12 B VDC White 3 +12 B VDC White 4 COM Black 5 COM Black 6 COM Black Back to Contents Page Back to Contents Page Specifications Dell™ Dimension™ 9150 Service Manual Processor Processor type Intel® Pentium® 4 Socket-T with Hyper- Threading or Dual-Core support Cache 2 MB Memory Type dual-channel 533- and 667-MHz DDR2 Memory connectors four Memory capacities 256 MB, 512 MB, or 1 GB Minimum memory 512 MB Maximum memory 4 GB BIOS address F0000h Computer Information Chipset Intel 945P DMA channels eight Interrupt levels 24 BIOS chip (NVRAM) 4 Mb NIC integrated-network interface capable of 10/100/1000-Mbps communication System clock 800- or 1066-MHz data rate Video Type PCI Express Audio Type internal 7.1 channel or PCI option cards Expansion Bus Bus type PCI 32 bit PCI Express x1, x4, and x16 Bus speed PCI 33 MHz PCI Express 100 MHz Bus throughput PCI Express: x1 slot bidirectional speed — 500 MB/s x4 slot bidirectional speed — 2 GB/s x16 slot bidirectional speed — 8 GB/s PCI connectors three connector size 120 pins connector data width (maximum) 32 bits PCI Express connector one x1 connector size 36 pins connector data width (maximum) 1 PCI Express lane PCI Express connector one x4 connector size 98 pins connector data width (maximum) 4 PCI Express lanes PCI Express connector one x16 connector size 164 pins connector data width (maximum) 16 PCI Express lanes Drives Externally accessible: two 3.5-inch drive bays (FlexBay) two 5.25-inch drive bays Available devices serial ATA drives (2), floppy drive, USB memory devices, CD drive, CD-RW drive, DVD drive, DVD-RW drive, Media Card Reader, and DVD/CD-RW combo drive Internally accessible: two 3.5-inch hard-drive bays Connectors External connectors: IEEE 1394 one front-panel 6-pin serial connector (with optional card) Video 15-pin VGA connector 28-pin DVI connector Network adapter RJ-45 connector USB two front-panel and five back-panel USB 2.0-compliant connectors Audio five back-panel connectors for line-in, line-out, microphone, surround, and center/Low Frequency Effects (LF...