dell latitude c400 User Manual

							System Board : Dell Latitude C400 Service Manual 
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System Board 
Dell™ Latitude™ C400 Service Manual 
  Removing the System Board
  Replacing the System Board
Removing the System Board
The system boards BIOS chip contains the service tag sequence, which is\
 also visible on a 
barcode label on the bottom of the computer. The replacement kit for the\
 system board 
may include a CD that provides a utility for transferring the service ta\
g sequence to the 
replacement system board.
NOTICE: Disconnect the computer and any attached devices from electrical outlets\
, 
and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the 
following procedure. 
1.  Remove the PC Card or plastic blank, if present, from the PC Card slot. \
2.  Remove the 
hard drive. 
3.  Remove the 
keyboard. 
4.  Remove the 
display assembly. 
5.  Remove the 
palm rest. 
6.  Remove the 
wireless network adapter, if present. 
7.  Remove the 
modem daughter card, if present. 
8.  Remove all installed 
memory modules. 
9.  Remove the 
audio board. 
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							System Board : Dell Latitude C400 Service Manual 
System Board Removal 
 
1 fan
2 reserve battery cable
3 connector for fan extender cable
4 hard-drive connector
5 M2 x 4-mm screw (1)
6 memory module socket
7 guide pins (2)
8 5-mm hex nuts (4)
9 7-mm hex nuts (2)
10.  Remove the four 5-mm hex nuts near each end of the serial and video conn\
ectors. 
11.  Use a flat-blade screwdriver to remove the two 7-mm hex nuts near each e\
nd of the  docking connector. 
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							System Board : Dell Latitude C400 Service Manual 
12.  Remove the two guide pins from the IDE connector. 
13.  Disconnect the cooling fan from the fan extender cable. 
14.  Disconnect the fan extender cable from the connector beside the internal\
 memory socket. 
15.  Disconnect the reserve battery cable from the system board. 
16.  Remove the M2 x 4-mm screw that secures the right front corner of the sy\
stem  board. 
17.  Disengage the system board from the back panel. 
Replacing the System Board
While replacing the system board, pull the fan extender cable aside to a\
void trapping it 
beneath the system board. After replacing the system board, route the ca\
ble between the 
hard-drive connector and the internal memory socket.
After you have replaced the system board, insert the floppy disk or CD t\
hat accompanied 
the replacement system board into the appropriate drive, and turn on the\
 computer. Follow 
the instructions on the screen.
NOTE: After replacing the system board, be sure to enter the computers servic\
e tag 
sequence into the BIOS of the replacement system board. 
Back to Contents Page
 
 
 
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							Battery Latch : Dell Latitude C400 Service Manual 
Back to Contents Page 
Battery Latch 
Dell™ Latitude™ C400 Service Manual 
  Removing the Battery Latch
  Replacing the Battery Latch
Removing the Battery Latch
NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the 
following procedure. 
1.  Remove the PC Card or plastic blank, if present, from the PC Card slot. \
2.  Remove the 
hard drive. 
3.  Remove the 
keyboard. 
4.  Remove the 
display assembly. 
5.  Remove the 
palm rest. 
6.  Remove the 
wireless network adapter, if present. 
7.  Remove the 
modem daughter card, if present. 
8.  Remove all installed 
memory modules. 
9.  Remove the 
audio board. 
10.  Remove the 
system board. 
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							Battery Latch : Dell Latitude C400 Service Manual 
Battery Latch Removal 
 
1 tension spring
2 bottom case
3 battery latch
4 battery release-button tabs
NOTICE: The tabs on the release button are plastic. When squeezing the tabs, 
be careful not to break them. 
11.  On the inside of the bottom case, use needle-nose pliers to gently squee\
ze the  two release-button tabs together and push the tabs down through the hole\
, 
catching the release button on the outside of the bottom case. 
12.  To remove the battery latch, unhook the small tension spring located on \
the  metal post next to the hard drive. 
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							Battery Latch : Dell Latitude C400 Service Manual 
Replacing the Battery Latch
1.  With the inside of the bottom case facing up, place the battery latch in\
 position. 
2.  Turn the bottom case over and align the slot in the battery latch with t\
he release-button slot in the bottom case. 
3.  Holding the battery latch in place, press the release-button tabs throug\
h the  underside of the bottom case and into the battery latch until the tabs s\
nap into 
place. 
4.  Replace the tension spring. 
Back to Contents Page
 
 
 
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							Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual
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Pin Assignments for I/O Connectors 
Dell™ Latitude™ C400 Service Manual
Serial ConnectorUSB Connector
Docking ConnectorIDE Module Bay Connector
Video Connector
 
Serial Connector 
Pin Signal
1 DCD
2 RXDA
3  TXDA 
4  DTR 
5  GND 
6  DSR 
7  RTS 
8  CTS 
9  RI 
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							Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual
Docking Connector 
PinSignal
1 STRB#/5V
2 PD0
3  PD1 
4  PD2 
5  PD3 
6  PD4 
7  PD5 
8  PD6 
9  PD7 
10  GND 
11  DOCK_SPKR 
12  DOCK_MIC 
13  DOCK_LINE 
14  DOCK_CDROM 
15  GND 
16  NC 
17  POWER_SW# 
18  QPCIEN# 
19  S1.6M_EN# Pin Signal
51  HSYNC 
52  VSYNC 
53  GND 
54  DOCKED 
55  USB_VD1+ 
56  USB_VD1- 
57  GND 
58  USB_VD2+ 
59  USB_VD2- 
60  DOCKOC1# 
61  RUN_ON# 
62  GND 
63  NC 
64  DOCK_SCLK 
65  DOCK_LRCK 
66  DOCK_MCLK 
67  GND 
68  +12V 
69  AFD# 
70  ERROR# 
71  ACK# PinSignal
101  VGA_GRN 
102  GND 
103  VGA_RED 
104  GND 
105  VGA_BLU 
106  DOCK_SD/MODE 
107  D_IRTX 
108  D_IRRX 
109  GND 
110  SPIRQB# 
111  SPIRQC# 
112  DAT_DDC2 
113  CLK_DDC2 
114  SPAR 
115  SPME# 
116  GND 
117  SSERR# 
118  SPERR# 
119  SLOCK# 
120  SSTOP# 
121  GND PinSignal
151  GND 
152  CLK_SPCI 
153  GND 
154  SAD0 
155  SAD1 
156  SAD2 
157  SAD3 
158  SAD4 
159  SAD5 
160  SAD6 
161  GND 
162  SAD7 
163  SAD8 
164  SC/BE0# 
165  SAD9 
166  SAD10 
167  SAD11 
168  SAD12 
169  GND 
170  SAD13 
171  SAD14 
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							Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual
20 DFDD/LPT# 
21  GND 
22  NC 
23  NC 
24  D_ACTLED 
25  D_PWRLED 
26  DOCK_PWR_SRC 
27  DOCK_PWR_SRC 
28  DOCK_PWR_SRC 
29  GND 
30  +5VDOCK 
31  +5VDOCK 
32  +5VDOCK 
33  +5VDOCK 
34  +5VDOCK 
35  GND 
36  DOCK_PWR_SRC 
37  DOCK_PWR_SRC 
38  DOCK_PWR_SRC 
39  DOCK_PWR_SRC 
40  GND 
41  DOCK_+DC_IN 
42  DOCK_+DC_IN 
43  DOCK_+DC_IN 
44  DOCK_+DC_IN 
45  DOCK_+DC_IN 
46  DOCK_+DC_IN 
47  DOCK_+DC_IN 
48  DOCK_+DC_IN 72  GND 
73  INIT# 
74  SLCT_IN# 
75  BUSY 
76  PE 
77  SLCT 
78  GND 
79  DAT_SMB 
80  DCLK_SMB 
81  SMB_INIT# 
82  GND 
83  DAT_DOCKSM1 
84  CLK_DOCKSM1 
85  DAT_DOCKKBD 
86  CLK_DOCKKBD 
87  GND 
88  RI0 
89  CTS0 
90  RTS0 
91  DSR0 
92  GND 
93  DTR0 
94  TXD0# 
95  RXD0# 
96  DCD0 
97  NC 
98  +5VSUS 
99  NC 
100 NC122 SDEVSEL# 
123  STRDY# 
124  SIRDY# 
125  SFRAME# 
126  SCLKRUN# 
127  GND 
128  SGNTA# 
129  SREQA# 
130  SGNT0# 
131  SREQ0# 
132  SPCIRST# 
133  SH1SEL# 
134  GND 
135  SWRPRT# 
136  SDSKCHG#/DRQ 
137  SDIR# 
138  STRK0# 
139  SSTEP# 
140  SDRV1# 
141  GND 
142  SMTR1# 
143  SWRDATA# 
144  SWGATE# 
145  SRDATA# 
146  SINDEX# 
147  GND 
148  NC 
149  +5VALW 
150 NC172 SAD15 
173  SAD16 
174  SC/BE1# 
175  CD/BE2# 
176  GND 
177  SAD17 
178  SAD18 
179  SAD19 
180  SAD20 
181  SAD21 
182  GND 
183  SAD22 
184  SAD23 
185  SAD24 
186  SC/BE3# 
187  SAD25 
188  GND 
189  SAD26 
190  SAD27 
191  SAD28 
192  SAD29 
193  SAD30 
194  SAD31 
195  GND 
196  NC 
197  NC 
198  NC 
199  NC 
200 GND
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							Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual
49 GND 
50 LOW_PWR
 
Video Connector 
PinSignal
1 RED
2 GREEN
3  BLUE 
4  NC 
5  GND 
6  GND 
7  GND 
8  GND  Pin
Signal
9  CRT_VCC 
10  GND 
11  NC 
12  DAT_DDC2 
13  HSYNC 
14  VSYNC 
15  CLK_DDC2 
USB Connector 
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