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compaq evo notebook n800c series User Manual

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Page 121

Removal and Replacement Procedures
Maintenance and Service Guide5–43
2. Use a flat-bladed tool to release the RTC battery from its 
socket 1 (Figure 5-31).
3. Remove the RTC battery 2.
Figure 5-31. Removing the Disk Cell RTC Battery
✎When replacing an RTC battery, insert the battery with the “+” 
sign facing up.
268135-002.book  Page 43  Thursday, October 24, 2002  4:10 PM 

Page 122

5–44Maintenance and Service Guide
Removal and Replacement Procedures
5.18 System Board
✎When replacing the system board, ensure that the following 
components are removed from the old system board and installed 
on the new system board:
■Memory expansion boards (Section 5.5)
■Mini PCI communications board (Section 5.6)
■Processor (Section 5.16)
■Disk cell RTC battery (Section 5.17)
■Modem cable (Section 5.19)
1. Prepare the computer for disassembly (Section 5.3) and 
remove the following components:
a....

Page 123

Removal and Replacement Procedures
Maintenance and Service Guide5–45
3. Remove the two PM2.0 × 8.0 screws 1 that secure the left 2 
and right 3 display supports to the base enclosure 
(Figure 5-32).
4. Remove the left and right display supports from the base 
enclosure.
Figure 5-32. Removing the Display Supports
268135-002.book  Page 45  Thursday, October 24, 2002  4:10 PM 

Page 124

5–46Maintenance and Service Guide
Removal and Replacement Procedures
✎A plastic fan channel 1 attaches to the right display support. The 
channel has two slots 2 on either end that fit around two tabs 3 
on the display support. The fan channel is included in the 
Miscellaneous Plastics/Hardware Kit, spare part numbers 
285261-001 and 286868-001 (Figure 5-33).
Figure 5-33. Replacing the Fan Channel on the Right 
Display Support
268135-002.book  Page 46  Thursday, October 24, 2002  4:10 PM 

Page 125

Removal and Replacement Procedures
Maintenance and Service Guide5–47
5. Remove the two PM2.0 × 5.5 screws 1 that secure the system 
board to the base enclosure on either side of the MultiBay 
connector (Figure 5-34).
6. Remove the two PM2.0 × 8.0 screws 2 that secure the system 
board to the base enclosure through the processor support 
bracket.
Figure 5-34. Removing the System Board Screws
268135-002.book  Page 47  Thursday, October 24, 2002  4:10 PM 

Page 126

5–48Maintenance and Service Guide
Removal and Replacement Procedures
7. Use the MultiBay connector 1 to lift 2 the front of the 
system board until the board rests at an angle (Figure 5-35).
8. Slide the system board forward at an angle 3 and remove it 
from the base enclosure.
9. Remove the PC Card bezel 4 from the system board.
Figure 5-35. Removing the System Board
Reverse the above procedure to install the system board.
268135-002.book  Page 48  Thursday, October 24, 2002  4:10 PM 

Page 127

Removal and Replacement Procedures
Maintenance and Service Guide5–49
5.19 Modem Cable
✎The modem cable is included in the Miscellaneous Cable Kit, 
spare part number 285268-001.
1. Prepare the computer for disassembly (Section 5.3) and 
remove the following components:
a. LED cover (Section 5.8)
b.
Keyboard and shield (Section 5.9)
c. Display (Section 5.10)
d. Top cover (Section 5.11)
e. Fan (Section 5.15)
f. System board (Section 5.18)
2. Turn the system board bottom side up with the rear panel 
facing...

Page 128

5–50Maintenance and Service Guide
Removal and Replacement Procedures
3. If the modem is installed on the system board, disconnect the 
modem cable from the modem 1 (Figure 5-36).
4. Disconnect the modem cable from the system board 2.
5. Remove the modem cable.
Figure 5-36. Removing the Modem Cable
When installing the modem cable, route the cable as shown in 
Figure 5-36.
268135-002.book  Page 50  Thursday, October 24, 2002  4:10 PM 

Page 129

Maintenance and Service Guide6–1
6
Specifications
This chapter provides physical and performance specifications.
Ta b l e  6 - 1
Computer
Dimensions
Height
Width
Depth1.30 in
12.48 in
10.10 in3.3 cm
31.7 cm
25.0 cm
Weight (varies by configuration)
15.0-inch display, 
MultiBay device,
1 memory expansion 
board
14.1-inch display, 
MultiBay weight 
saver, 1 memory 
expansion board6.40 lb
5.45 lb2.92 kg
2.47 kg
Stand-alone power requirements
Nominal operating 
voltage
Average operating 
power
Peak operating...

Page 130

6–2Maintenance and Service Guide
Specifications
✎Applicable product safety standards specify thermal limits for 
plastic surfaces. The computer operates well within this range of 
temperatures.
Te m p e r a t u r e
Operating
Nonoperating50° to 95° F
14° to 140° F10° to 35° C
-10° to 60° C
Relative humidity (noncondensing)
Operating
Nonoperating10% to 90%
5% to 95%, 101.6° F (38.7° C) maximum wet bulb 
temperature
Altitude (unpressurized)
Operating
Nonoperating0 to 10,000 ft
0 to 30,000 ft0 to 3,048 m
0...
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