HP Compaq Business Desktop dc7100 Series Assembly instructions

HP-00007-01, Appendix 3 5-Aug-2005
HP Restricted
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Appendix 3 Product End-of-Life Disassembly instructions – rev a
Product Identification:
Marketing Name / Model Description
HP Compaq Business Desktop dc7100 Series- USDT HP business desktop PC – Ultra-Slim Desktop
Purpose: The document is intended for use by end-of-life recyclers or treatment facilities. It provides the
basic instructions for the disassembly of HP products to remove components and materials requiring
selective treatment.
1.0 Items Requiring Selective Treatment
1.1 Items listed below are classified as requiring selective treatment.
1.2 Enter the quantity of items contained within the product which require selective treatment in
the right column, as applicable.
Item Description Notes
Qty items in
product.
Printed Circuit Boards (PCB) or Printed
Circuit Assemblies (PCA)
With a surface greater than 10
square cm
2 (sys bd, power
supply PCA)
Batteries All types including standard
alkaline and lithium coin or button
style batteries
1
Mercury containing components For example, mercury in lamps,
display backlights, scanner lamps,
switches, batteries
Liquid Crystal Displays (LCD) with a
surface greater than 100 square cm
Includes background illuminated
displays with gas discharge lamps
Cathode Ray Tubes (CRT)
Capacitors / condensers (Containing
PCB / PCT)
Electrolytic Capacitors / Condensers
measuring greater than 2.5 cm in
diameter or height
4
External electrical cables and cords PSU cables, IDE cables, SATA
cables.
Gas Discharge Lamps
Plastics containing Brominated Flame
Retardants
Components and parts containing toner
and ink, including liquids, semi-liquids
(gel/paste) and toner
Include the cartridges, print
heads, tubes, vent chambers, and
service stations.
Components and waste containing
asbestos
Components, parts and materials
containing refractory ceramic fibers
Components, parts and materials
containing radioactive substances

HP-00007-01, Appendix 3 5-Aug-2005
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2.0 Tools Required
List the type and size of the tools that would typically be used to disassemble the product to a
point where components and materials requiring selective treatment can be removed.
Tool Description Tool Size (if applicable)
Flat blade screwdriver
Torx screwdriver
Phillips screwdriver
Diagonal cutters (dikes)
3.0 Product Disassembly Process
3.1 List the basic steps that should typically be followed to remove components and materials
requiring selective treatment:
SYSTEM BOARD
1 If the PC is mounted in the accessory mounting stand, remove the stand and lay the
computer down on its rubber feet (see Figure 1 below).
2 To remove the access panel (see Figure 2 below):
a) Lay the computer down so the rubber feet rest on a solid surface.
b) Loosen the captive thumbscrew that secures the access panel to the computer chassis.
c) Slide the top access panel back about 1.3 cm (1/2 inch), and then lift it off the unit.
3 To remove a MultiBay device from the drive cage:
a) To unlock the MultiBay device, push down on the green locking lever located on top of
the MultiBay drive cage, then push the lever to the right (see Figure 3 below).
b) Eject the MultiBay device by sliding the front-mounted eject lever to the left, and then
pull the device out of the device bay (see Figure 4 below).
4 To remove the MultiBay riser card, grasp the green handle on top of the riser card
assembly and lift it straight up (see Figure 5 below).
5 To remove the front panel assembly (see Figure 6 below):
a) Lift up on the two green locking lever release tabs on the right side of the bezel. This
will unlatch the front panel assembly and push it about 1.3 cm (1/2 inch) out of the
chassis.
b) Disconnect the fan cable from the system board.
c) Remove the panel assembly by pulling it straight out of the chassis.
6 Remove the memory modules.
7 To remove the heatsink (see Figure 7 below):
a) Disconnect the thermal sensor and heatsink fan cables from the system board.
b) Unscrew the four screws that secure the heatsink to the system board, and then lift the
heatsink from the system board.

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SYSTEM BOARD cont
8 To remove the power supply (see Figure 8 below):
a) Disconnect the power supply cable from the hard drive and the 6-pin power supply
cable on the system board alongside the heatsink.
b) Slide the power supply toward the front of the chassis about 1.3 cm (1/2 inch), and then
slide the power supply toward the center of the chassis and rotate it up to access the
main cable connection beneath it.
c) Disconnect the power cable from the system board.
NOTE: There are slots on the chassis that match with clips on the bottom of the power
supply for positive retention.
d) Remove the power supply from the chassis.
9 Disconnect all cables connected to the system board.
10 To remove the system board (see Figure 9 below):
a) Remove the thumbscrew that secures the system board to the chassis.
b) Slide the system board toward the front of the chassis, making sure that all keyhole
retainers are clear before lifting the system board from the chassis.
BATTERY
Locate the battery and battery holder on the system board. Depending on the type of battery
holder on the system board, complete the following instructions to remove the battery:
TYPE 1 BATTERY HOLDER (see Figure 10 below)
Lift the battery out of the holder.
TYPE 2 BATTERY HOLDER (see Figure 11 below)
To release the battery from its holder, squeeze the metal clamp that extends above one edge of
the battery. When the battery pops up, lift it out.
TYPE 3 BATTERY HOLDER (see Figure 12 below)
Pull back on the clip that holds the battery in place, and then remove the battery.
POWER SUPPLY
1 Disconnect all power cables from all devices.
2 Slide the power supply toward the front of the chassis about 1.3 cm (1/2 inch) then slide it
toward the center of the chassis and rotate it up to access the main cable connection
beneath it (see Figure 13 below).
NOTE: There are slots on the chassis that match with clips on the bottom of the power
supply for positive retention.
3 Remove the power supply from the chassis.

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POWER SUPPLY PRINTED CIRCUIT ASSEMBLY
1 Remove the nine screws that secure the power supply cover. Note that eight of the screws
are on the top, while one is on the back of the power supply (see Figures 14 & 15 below).
2 Snip the two plastic cable clamps that secure wires to the power supply chassis
(see Figure 16 below).
3 Lift the cover off the power supply.
4 Using a pair of diagonal cutters (dikes), snip the black and white power connector wires
(see Figure 17 below).
5 Remove the two screws that secure the printed circuit assembly to the chassis
(see Figure 18 below).
6 Lift the PCA to gain access to the speaker wire.
7 Cut or unplug the speaker wire (see Figure 19 below).
8 Lift the PCA out of the chassis.
9 Cut the two green capacitors from the board (see Figure 20 below).
10 Cut or pry off the two large blue capacitors lying horizontally on the board
(see Figure 20 below).

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3.2 ILLUSTRATIONS
FIGURE 1: Removing the mounting stand
FIGURE 2: Removing the computer cover
FIGURE 3: Unlocking the MultiBay device
FIGURE 4: Ejecting the MultiBay device

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FIGURE 5: Removing the riser card FIGURE 6: Removing the front panel
assembly
FIGURE 7: Removing the heatsink assembly
FIGURE 8: Removing the power supply

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FIGURE 9: Removing the system board
FIGURE 10: Type 1 battery holder
FIGURE 11: Type 2 battery holder
FIGURE 12: Type 3 battery holder

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FIGURE 13: Removing the power supply FIGURE 14: Power supply screw locations
FIGURE 15: Power supply screw location FIGURE 16: Cut plastic cable clamps

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FIGURE 17: Cut black and white wires FIGURE 18: PCA screw locations
FIGURE 19: Cut or unplug speaker wire
FIGURE 20: Cut two capacitors