(Model N45) Hardware Maintenance Reference

(Model N45) Hardware Maintenance Reference
 May 15, 1992
This pamphlet is intended to be used with the IBM
Personal System/2 Hardware Maintenance Reference
manual (part number 15F2190. form number
S15F-2190-00) and the IBM Personal System/2 Hardware
Maintenance Service manual (part number 15F2200. form
number S15F-2200-00).
Part Number 42G0485
Form Number S42G-0485-00
May 15, 1992
This pamphlet is intended to be used with the IBM
Personal System/2 Hardware Maintenance Reference
manual (part number 15F2190. form number
S15F-2190-00) and the IBM Personal System/2 Hardware
Maintenance Service manual (part number 15F2200. form
number S15F-2200-00).
Part Number 42G0485
Form Number S42G-0485-00
First Edition (June 1992)
The following paragraph does not apply to the United Kingdom or any country where
such provisions are inconsistent with local law: INTERNATIONAL BUSINESS
MACHINES CORPORATION PROVIDES THIS PUBLICATION "ASIS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUTNOT
LIMITEDTO, THE IMPLIED WARRANTIES OFMERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied
warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes
are periodically made to the information herein; these changes will be incorporated in
new editions of the publication. IBM may make improvements and/or changes in the
product(s) and/or the program(s) described in this publication at any time.
It is possible that this publication may contain reference to, or information about, IBM
products (machines and programs), programming, or services that are not announced
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IBM intends to announce such IBM products, programming, or services in your country.
Requests for technical information about IBM products should be made to your IBM
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IBM may have patents or pending patent applications covering subject matter in this
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License inquiries can be sent, in writing, to the IBM Director of Commercial Relations,
IBM Corporation, Purchase, NY 10577.
© Copyright International Business Machines Corporation 1992. All rights
reserved .
Note to U.S. Government Users — Documentation related to restricted rights — Use,
duplication or disclosure is subject to restrictions set forth in GSA ADP Schedule
Contract with IBM Corp.
Trademarks
PS/note is a trademark of the International Business Machines Corporation.
80386SL, 80387SL and 80387SX are trademarks of the Intel Corporation.
Contents
Chapter 1 Introduction
Related Materials . . . .......... . . . .. . . _ _ 1-1
Tools . ....... еее 1-2
Safety Precautions . .............. ... ._ 1-2
Base Computer ........ . .. 1-2
Main Board . ............ ........ . 1-3
DC-to-DC Converter Board ........... E 1-3
Top Cabinet Assembly . . ............. . _ . 1-3
Expansion Memory Board . . .............. 1-4
Hard Disk Drive . . . ......... ....... .. SE 1-4
Diskette Drive . . .......... ....... . .. 1-4
Keyboard . . . .................. ... 1-4
Battery Pack . . . ................... 1-4
Optional Hardware . ............... .. .. 1-4
Chapter 2 Operation
Power Up . .................... ... . 2-1
Resetting the Computer . . . . ...... . ... . .. _. 2-2
The Monitor Program . ............ ... .. . _ 2-3
Entering the Monitor Program . . ........... . 2-4
Booting from Disk . . ............ .... 2-6
Running Extended Diagnostics . ............. 2-6
Reprogramming Flash BIOS . ............. _ 2-10
Ц
Chapter 3 Disassembly and Options
Static Precautions . . . . . . . . HH 3-1
Disassembly .... 22244044 4444004 644 44 4 4800 3-2
Battery Pack ... 2222444444 4444 64 465 +0 3-2
Clearing the Passwords . . . . . . . ... ........... 3-3
Keyboard Assembly . . . . .. ...... 00. 3-4
Cabinet Top . . . . . . . e aerea e e eee 3-6
Battery Cable/Contact Assembly . . . . ............ 3-9
PS/2™ Mouse Board . . . . . . . . 2... e erro 3-10
Diskette Drive Assembly . . . . . . . ............ 3-12
Hard Disk Drive Assembly . . . . . . «vv vv vivo 3-14
Expansion Memory Board . . . . . . ............ 3-16
Expansion Memory Mounting Bracket . . . . ........ 3-18
Backup Battery . . . . . . . e. e. e mear eee. 3-19
Modem Cable/Connector . . . . . nx... 2. ere. 3-21
DC-to-DC Board . ...... .... eee. 3-22
Main Board . . . . . . . . 2. 2» . e... erre. 3-24
Cabinet Bottom . . ... .. .. aaa ae eee ae 3-27
Port Bay Door . . . . . . . «ooo 3-28
Option Installation . . . ... ................. 3-29
Memory Modules .. ... 2.444 4044444444 4406 3-29
Math Coprocessor .... 4224444404 4444 64806 3-33
Modem ...... 22044 4444644044 4444 406 3-35
Contents
Ш
Specifications
Power . . .... eee eno. a S-1
AC Adapter ... 2214124 LL LL A LA LL LL LL LS S-1
Internal DC Conversion . . . . . ............... S-1
Battery Pack . . . . ..... nece. ena S-2
Backup Battery . ...... . . 2... eee... S-2
LED Indicators . . . . . ............ aa S-3
Power . . . . recreo. an. S-3
Diskette Drive . . . . . .................... S-3
Hard Disk Drive . . . . . .. ................. S-3
Charge Status . . . .. .................... S-3
Processors . . . . . . 0 0 aan an ene aa S-4
Standard . . . . . LLL LLL, S-4
Optional . . . .. .......... aa S-4
Memory . ....... 4 4 4 4 LL eee erre. S-5
System Board .. 1.221111 1 4 1 1 1 1 LL LL 10 S-5
Метогу Мар... ....................... 5-6
Input/Output. . ........ aaa S-7
Serial . . eee. e aaa ae ne era S-7
Parallel . .... . narra aa ene e a S-8
Mouse Port . . . . ......... 4 LL LL LL LL LL S-9
Video . . . A LL LL LL LL LL LL LL S-10
Disk Drives .. 2.12 21112 LL 4 4 LL LL LL LL LL LS S-11
Contents
IV
Power Connectors . . . . 2.444444 4444 4 4 4 4 4 4446 S-11
Backlight Power Connector . . . . . ............ S-11
System Power Connector . . . . . . ............. S-12
Keyboard .. 24244444 46 4 4 44 0 4 0 4 4 4 1 ea. S-13
Keyboard LEDs . . . . .. .................. S-13
Cabinet ... 22444 44444 4 4 4 4 4 4 4 4 4 4 4 4 4 24 S-13
Dimensions . . . . . . . . . ... 4 4 4 4 1 41 111140 S-13
Weight . .......... pone ee ae ae e ee ae e S-13
Environmental . . . . .. .. e ereereoe naaa e S-14
Temperature... 2.224 4444 4 44 4 4 4 4 4 4 1 1 2 20 S-14
Humidity 3.222224 1442 4 4 4 4 4 4 4 4 aaa aa S-14
Altitude 2..2. 22. 5-14
Audio ... 22441442 4 41 4 4 4 0 4 4 0 4 4 0 4 4 C4 4 0 S-14
Contents
Chapter 1
Introduction
The PS/note Model N45SL is a Personal Computer AT™compatible
notebook size computer.
-1.
Figure 1
Materials
Related
Hardware Maintenance Service manual
Guide to Operations
Advanced Diagnostics diskette.
1-2
Tools
Use the following tools to service this computer:
Safety
Small flat-bladed screwdriver
#1 phillips screwdriver
Small needle-nosed pliers
Digital voltmeter >
Tri-Connector Wrap Plug.
Precautions
Avoid potential shock and personal injury by using the following
precautions when servicing this computer:
Base
When operating the computer, use a grounded AC power
source.
Disconnect AC power and remove the battery pack before
opening the cabinet.
Computer
The computer consists of ten major assemblies:
Main board
DC-to-DC converter board
Top cabinet assembly
Expansion memory board
Hard disk drive
Diskette drive
Keyboard
Battery pack.
Introduction
1-3
Main Board
The main board contains the:
e CPU (80386SL)
e Math coprocessor, if one is installed
e System RAM '
e Bootstrap ROM
e Flash BIOS ROM
e Serial and parallel ports
e Modem connector
e Keyboard interface
e Mouse/external keyboard assembly
e Real-time clock
e Diskette drive controller
e Hard disk drive interface.
DC-to-DC Converter Board
The internal DC-to-DC converter modifies the input voltage to supply
the following outputs:
e +5 V dc
e —18 V dc for the LCD display
e 300 V ac for the cold cathode fluorescent (CCFL) backlight
e -10 V dc for the computer’s internal components and
subassemblies.
Top Cabinet Assembly
The top cabinet assembly contains the :
e LCD display panel
e Status indicators
e Power switch
e Brightness and contrast controls.
Introduction
1-4
Expansion Memory Board
This board plugs into the main board, and provides three banks of
sockets that allow the RAM to be expanded up to 8M. The lid switch
is also located on this board.
Hard Disk Drive
Contains one internal, 2.5-inch hard disk drive.
Diskette Drive
The internal diskette drive accepts 3.5-inch 1.4M floppy disks.
Keyboard
This keyboard offers all the functions and features of a full-size
AT-compatible keyboard.
Battery Pack
The battery pack contains the charge control circuitry, and provides
approximately 3 hours of battery-powered computing.
Optional Hardware
The following hardware options are available for this computer:
e Math coprocessor (not available from IBM)
e 2M memory expansion modules
e 300/1200/2400 bps modem
e FAX/data modem.
Introduction
Chapter 2
Operation
“
This chapter covers power up, reset, the Monitor program, and other
operating information.
Power Up
Power up the computer by pressing the power button on the top of
the cabinet.
When power is applied:
e The keyboard is reset (status LEDs blink)
e The power LED turns on
e The LCD panel blinks and comes on
e The hard disk drive LED flashes
* The NUM LOCK LED turns on (if configured in the Setup
program)
e The diskette drive access LED flashes
e The hard disk drive LED flashes
e The computer attempts to autoboot (load the operating
system from the device selected in the Setup program).
2-2
If the operating system is not installed, or it is not present on the disk,
one of the following error messages appears:
+++ DISK ERROR: Drive not ready! +++
+++ DISK ERROR: No bootable partitions +++
No system
Not a bootable partition
Refer to the operating system documentation for installing operating
system software. |
If the computer detects faults during the power-up sequence, error
messages may appear on the display (if the computer can drive the
display). For further information on error messages, refer to the
“Error Messages” section of the Hardware Maintenance Service
manual.
Resetting the Computer
The computer can be reset in one of the following ways:
e Press and hold the CTRL+ALT+DEL keys, then release
them. This reinitializes the computer and begins the
autoboot sequence.
e Press and hold the CTRL+ALT+INS keys, then release
them. This reinitializes the computer and enters the
Monitor program.
e Press and hold the lid switch and then press the power
button. All circuits are reset to the power-on state.
e Tum the computer off, wait 15 seconds, then turn it back
on. All circuits are reset to the power-on state.
Operation
2-3
The Monitor Program
The MFM-300 Monitor program contains:
e Power-up tests to detect problems that would prevent
additional tests or an operating system from loading.
e The boot command to load the operating system into
memory from any drive.
e User-selectable tests to check the disk drives, keyboard, and
memory.
e Video commands to set video and scroll modes.
e A machine language debugger.
e The Setup program to set and store hardware configuration
information.
e Flash BIOS reprogramming capability.
Operation
2-4
Entering the Monitor Program
There are two ways to enter the Monitor program:
CTRL+ALT+INS — Press and hold the CTRL+ALT+INS keys, and
then release them. A message similar to the following appears:
MFM-300 Monitor, Version X.X
Memory size: 640K + xxxxK + 64K Cache
Enter "?" for help
—>
The first line indicates the ROM version. The second line indicates
how much memory is installed, including base, extended, and cache
memory. The third line gives the syntax for the help command. The
last line shows the Monitor prompt (—>).
CTRL+ALT+ENTER — If the CTRL+ALT+INS key combination
does not force the computer to enter the Monitor program, press and
hold the CTRL+ALT+ENTER keys, and then release them. The CPU
register contents are displayed on the screen followed by the Monitor
prompt.
Note: In some cases the CPU can lock up, preventing access to the
Monitor program by either method. If this happens, turn off the
computer, wait 15 seconds, then turn it back on. This clears the CPU
and allows you to use the CTRL+ALT+INS key combination.
Operation
2-5
Once the computer has entered the Monitor program, type a question
mark (?) and press ENTER to display the Monitor program command
summary menu.
MFM-300 Command Summary
Cmd: Explanation Syntax
?: Help ?
B: Boot from disk B[{F W}][{0I 11 21 3! }][< partition> ]
C: Color bar C
D: Display memory D[<range>]
E: Examine memory E<addr>
F: Fill memory F<range>,{<byte>|"<string>"}...
G: Execute (Go) G[=<addr>][,<breakpoint>]...
H: Hex math H<number1>,<number2>
Е Input from port I<port>
M: Move memory block M<range>,<dest>
O: Out to port O<port>,<value>
R: Examine Registers R[<register>]
S: Search memory S<range>,{<byte>l"<string>"}...
T: Trace program T[<count>]
U: Unassemble program U[<range>]
V: Video Scroll V[M<mode>][S<scroll>}
Where <range> is: <addr>{,<addr>IL<length>}
TEST: Extended diagnostics TEST
SETUP: Define hardware Setup SETUP
NEWBIOS: Reprogram Flash BIOS NEWBIOS [filename]
—>
Type the command, using the syntax (entry format) shown, and then
press ENTER. If the syntax is wrong, the computer reports that an
invalid command was entered. The command syntax uses the
following conventions:
e Brackets [option] indicate optional entries
e Braces {choicd choice} indicate a choice of entries
e Angle braces <variable> indicate variables.
Operation
2-6
The following sections describe booting from disk, running Monitor
Diagnostics, and reprogramming the Flash BIOS. The other
commands in the command summary are described in the Guide to
Operations.
Booting from Disk
The boot process loads the operating system from a disk into
computer memory. The command syntax is:
BI{FIW}I{{O0111213}][:<PARTITION>]
To boot the diskette drive, type BF (boot from floppy) and press
ENTER. To boot the hard disk drive, type BW and press ENTER. If the
drive is partitioned, add the appropriate drive or partition number to
the boot command. Refer to the operating system documentation for
additional information.
Error messages appear if an attempt is made to boot from a
non-existent drive. To correct this, access the Monitor program and
enter the correct boot command. For more information about error
messages, refer to the Hardware Maintenance Service manual.
Running Monitor Diagnostics
The Monitor program contains five user-selectable tests. To access the
test menu, type TEST at the Monitor prompt and press ENTER. The
following menu appears:
CHOOSE ONE OF THE FOLLOWING:
DISK READ TEST
KEYBOARD TEST
BASE MEMORY TEST
EXTENDED MEMORY TEST
POWER-UP TEST
EXIT
Oy Ul WN
ENTER YOUR CHOICE:
Operation
2-7
To run a test, type the number that corresponds to the test. With the
exception of the keyboard test, each test continues to run until an
error 1s detected or the test is halted.
To stop a test, press the ESC key once. Press the ESC key a second
time to return to the test menu. Select another test or select EXIT to
return to the Monitor prompt.
All tests, except for the keyboard test, display a test count similar to
the following:
SAMPLE TEST
TEST COUNT = X
TYPE <ESC> TO ABORT
If an error is detected during the test, information about the error
appears on the display.
Disk Read Test — This test continuously reads the first sector of
track 0 on the test drive. To change the test drive, manually boot
from the drive you want to test. It is not necessary for the boot
operation to actually load the operating system. To run the test, there
must be a formatted disk in the drive.
Successful completion of this test indicates only that the drive can
read from the disk. If the computer still fails to boot, problems could
exist with memory or related control circuits.
Operation
2-8
Keyboard Test — This test checks the operation of most keys on
the keyboard. Valid entries display an ASCII character or symbol and
a key scan code each time a key is pressed. The following keys cannot
be tested:
e PRTSCR
e SYSREQ
e NUMLOCK
e PADLOCK
e PAUSE
e SCROLILOCK
e CAPSLOCK
e SHIFT
e CTRL
e ALT
e FN.
Operation
2-9
Base Memory Test — This test checks all memory in the first
megabyte of the system memory map, including video memory.
While the test is running, a clicking sound can be heard. When the
test reaches the video memory area, a series of moving patterns is
displayed on the screen.
Extended Memory Test — This test checks all installed memory
above the 1 megabyte base memory area. Since no video memory
exists in this area, no patterns appear.
Power-Up Test — This test continuously repeats the power-up tests
used during startup. This test checks the following:
Crystal frequencies
Interrupt controllers
DMA controllers
Disk drive controller
Timer 1 interrupt
CPU
ROM
RAM.
Operation
2-10
Reprogramming Flash BIOS
The NEWBIOS function in the Monitor program provides a means for
reprogramming (or updating) the Flash ROM containing the system
BIOS code.
Note: Perform the NEWBIOS function only while operating on AC
power.
To reprogram the Flash ROM:
1. Access the Monitor program with the CTRL+ALT+INS key
combination.
2. Insert the Advanced Diagnostics diskette in drive A.
3. Type NEWBIOS, then press ENTER.
If NEWBIOS is entered without an accompanying filename,
NEWBIOS looks on the diskette in drive A for a file named
ROMIMAGE.BIN. If NEWBIOS is followed by a space and a filename,
then NEWBIOS looks for the designated file on drive A. The specified
filename must include the extension. Any extension containing three
valid characters 1s acceptable.
The NEWBIOS function performs three tests on the file before
reprogramming the Flash ROM. The tests determine the size of the
file, the computer type, and the checksum of the file. After all three
tests are completed successfully, the Flash ROM is reprogrammed.
The following prompt is displayed:
Programming success. Press ENTER key to reboot
system...
In order for the computer to read the new code, the system must be
rebooted. Press ENTER to reboot the system.
If the NEWBIOS function fails and displays any error messages, turn
the computer off, wait 15 seconds, then turn the computer back on. If
the Flash ROM is corrupt, the computer will initiate the NEWBIOS
function automatically. Refer to the Hardware Maintenance Service
manual for information on Flash ROM-related error messages.
Operation
Chapter 3
Disassembly and Options
This chapter provides computer disassembly procedures and optional
hardware installation instructions.
Static Precautions
To protect ICs (integrated circuits) and circuit boards:
e Do not remove any static-sensitive device from its protective
packaging until you are ready to install it.
e Equalize static electricity between the work surface, the
device, and you by touching the work surface with one
hand and then picking up the device with the other hand.
e Once you remove the device from its protective packaging,
do not set it down until it is either installed in the computer
or returned to its protective packaging.
Note: An electrostatic discharge (ESD) strap should be used to
establish personal grounding.
AA
Caution: Hazardous voltages are present inside the computer when it
is connected to an AC power source, even when the power switch on the
computer is turned off. To prevent an electrical hazard during
service, maintenance, or adding enhancements, disconnect
the power cord from the AC outlet, disconnect the external
AC adapter, and remove the NiCad battery pack before
removing the computer cover.
3-2
Disassembly
Battery Pack
1. Disconnect the AC adapter and all peripherals.
2. Turn the computer over.
3. Push the latches D to release the battery pack.
Figure 3-1. Battery Pack Latches
4 Lift the battery pack from the computer.
Figure 3-2. Removing the Battery Pack
5. To install the battery pack, reverse the process in the above steps.
Disassembly and Options
3-3
Clearing the Passwords
1.
2.
3.
4.
Turn the computer upside down.
Remove the battery pack as described earlier.
Remove the math coprocessor access panel.
Using alligator clips, connect a jumper wire O between the two
pins on each side of the socket.
Figure 3-3. Connecting a Jumper Wire
9.
Reinstall the battery pack.
Turn the computer on. Leave the computer on until the LEDs on
the LED board blink and the computer locks up. This should not
take over 20 seconds.
Remove the jumper wire.
Press and hold the lid switch, and press the power button to
perform a cold reset.
Turn the computer off.
10. Replace the math coprocessor access panel.
Disassembly and Options
3-4
Keyboard Assembly
1. Remove the battery pack as described earlier.
2. Remove the modem cover as described later in the “Modem”
section.
3. Remove the screws that secure the keyboard assembly to the
cabinet bottom.
4. With a small flat-bladed screwdriver, separate the keyboard
assembly D from the cabinet bottom.
Figure 3-4. Separating the Keyboard Assembly from the Cabinet Bottom
Disassembly and Options
3-5
5. Disconnect the keyboard cables O from CN8 @and CN9 ® on the
main board.
6. Lift the keyboard assembly and keyboard cables from the
computer.
Figure 3-5. Removing the Keyboard Assembly
7. To install the keyboard, reverse the process in the above steps.
Disassembly and Options
3-6
Cabinet Top
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel ® as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4. Remove the keyboard assembly as described earlier.
S. Tilt the LCD display all the way back.
6. Remove the hinge covers D by applying pressure to the hinge
cover sides and pulling them from the cabinet top @.
7. Remove the base hinge screws @ from the cabinet top.
8. Remove the screws @ securing the cabinet top to the cabinet
bottom.
9. Remove the left and right hinge ground plates ® from the
cabinet top.
Figure 3-6. Removing the Hinge Covers and Ground Plates
Disassembly and Options
3-7
10. Disconnect the backlight power cable © from CN4 on the
DC-to-DC board @.
11. Disconnect the LED/power switch board assembly cable © from
CN16 on the main board.
12. Lift the cabinet top and shielding from the computer and set
them aside.
Figure 3-7. Removing the Cabinet Top and Shielding
13. Disconnect the backup battery but do not remove.
14. Remove the expansion memory board as described later in the
“Expansion Memory Board” section.
Disassembly and Options
3-8
15. Remove the expansion memory mounting bracket © as described
later in the “Expansion Memory Mounting Bracket” section.
16. Remove the ground wire @ and disconnect the LCD drive cable
O from CN12 O on the main board and remove the cabinet top.
17. To install the cabinet top, reverse the process in the above steps.
Be sure to reroute the LCD drive cable exactly as shown.
Figure 3-8. Rerouting the LCD Drive Cable
—'Q
O
Disassembly and Options
3-9
Battery Cable/Contact Assembly
1.
2.
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove the modem cover as described later in the “Modem”
section.
Remove the keyboard assembly as described earlier.
Remove the cabinet top as described earlier, but do not remove
the LCD display from the cabinet top.
Remove the battery contact assembly O from between the
compartment © and the floppy disk drive assembly.
Disconnect the battery cable from CN1 ® on the DC-to-DC board
O.
Figure 3-9. Removing the Battery Cable/Contact Assembly
8.
To install the battery cable/contact assembly, reverse the process
in the above steps.
Disassembly and Options
3-10
PS/2™ Mouse Board
1.
2.
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove the modem cover as described later in the “Modem”
section.
Remove the keyboard assembly as described earlier.
Remove the cabinet top as described earlier.
Disassembly and Options
3-11
6. Disconnect the PS/2 mouse board cable from CN7 O on the main
board.
7. Remove the screw that secures the PS/2 mouse board O to the
cabinet bottom O.
8. Spread the tabs apart with a small flat-bladed screwdriver and
lift the board out of the computer.
9. To install the PS/2 mouse board, reverse the process in the
above steps.
Disassembly and Options
3-12
Diskette Drive Assembly
Notice: Use static precautions.
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4. Remove the keyboard assembly as described earlier.
5. Remove the cabinet top as described earlier.
6. Remove the screws securing the diskette drive to the cabinet bottom.
Disassembly and Options
3-13
7. Disconnect the diskette drive cable ® from CN5 @ on the main
board located under copper shield tape.
8. Lift the diskette drive assembly © from the computer.
Figure 3-11. Removing the Diskette Drive Assembly
9. To install the diskette drive, reverse the process in the above
steps.
Disassembly and Options
3-14
Hard Disk Drive Assembly
Notice: Use static precautions.
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4. Remove the keyboard assembly as described earlier.
5. Remove the cabinet top as described earlier.
6. Remove the diskette drive assembly as described earlier.
7. Turn the computer over and remove the screw securing the hard
disk drive assembly ® to the cabinet bottom.
8. Turn the computer right side up and disconnect the hard disk
drive cable @ from CN6 ® on the main board.
Disassembly and Options
3-15
9. Lift the hard disk drive assembly out of the computer.
Figure 3-12. Removing the Hard Disk Drive Assembly
10. To install the hard disk drive, reverse the process in the above
step.
11. Run PREP (refer to Appendix À of the Hardware Maintenance
Service manual).
12. Have the customer run DOS “FDISK” or equivalent command to
partition the hard disk.
Disassembly and Options
3-16
Expansion Memory Board
1.
2.
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove the modem cover as described later in the “Modem”
section.
Remove the keyboard assembly as described earlier.
Remove the cabinet top as described earlier.
Remove the three screws from the expansion memory board D
and move the shielding @ out of the way.
Disassembly and Options
3-17
Notice: Do not crease the shielding. This could break the foil conductor.
7. Lift the expansion memory board out of sockets CN2 ® and CN3
@ on the main board.
Figure 3-13. Removing the Expansion Memory Board
8. To install the expansion memory board, reverse the process in
the above steps.
Disassembly and Options
3-18
Expansion Memory Mounting Bracket
1.
2.
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove the modem cover as described later in the “Modem”
section.
Remove the keyboard assembly as described earlier.
Remove the cabinet top as described earlier.
Remove the expansion memory board as described earlier.
Remove the two screws O from the expansion memory mounting
bracket @ and lift the bracket out of the computer.
Figure 3-14. Removing the Expansion Memory Mounting Bracket
8.
To install the expansion memory mounting bracket, reverse the
process in the above steps.
Disassembly and Options
3-19
Backup Battery
Notice: This procedure deletes all configuration information stored in
CMOS RAM. Note the current Setup data before removing the backup
battery so you can re-enter the correct information after installing the new
battery.
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4. Remove the keyboard assembly as described earlier.
5. Remove the cabinet top as described earlier.
Note: When removing the cabinet top, it is not necessary to
disconnect the LCD drive cable from CN12 on the main board.
6. Remove the expansion memory board as described earlier.
7. Remove the expansion memory mounting bracket as described earlier.
Disassembly and Options
3-20
8. Disconnect the backup battery cable ® from CN3 @ on the DC-to-DC
board O.
9. Lift the backup battery @ and the double-sided tape ® out of the
computer.
Figure 3-15. Removing the Backup Battery
Note: Dispose of the battery according to prevailing regulations.
10. To install the backup battery, reverse the process in the above steps.
Make sure the battery is as far forward as possible to leave room for
top cover.
Disassembly and Options
3-21
Modem Cable/Connector
1.
2.
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove the modem cover as described later in the “Modem” section.
Remove the keyboard assembly as described earlier.
Remove the cabinet top as described earlier.
Remove the modem, if installed.
Remove the screws securing the modem cable/connector ® to
the modem frame @.
Disconnect the modem cable/connector from CN14 © on the
main board, and lift the modem cable/ connector out of the computer.
Figure 3-16. Removing the Modem Cable/Connector
9.
To install the modem cable/connector, reverse the process in the
above steps.
Disassembly and Options
3-22
DC-to-DC Board
Notice: Use static precautions.
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4. Remove the keyboard assembly as described earlier.
5. Remove the cabinet top as described earlier.
6. Remove the expansion memory board as described earlier.
7. Remove the expansion memory mounting bracket as described
earlier.
8. Disconnect the backup battery cable as described earlier.
9. Remove the modem cable/connector as described earlier.
Disassembly and Options
3-23
10.
11.
12.
13.
Disconnect the battery cable D from CN1 O on the DC-to-DC
board ®.
Remove the screws securing the DC-to-DC board to the main
board.
Carefully lift up the front side of the DC-to-DC board to unplug it
from the main board socket O.
Remove the DC-to-DC board and the shielding 6 and insulator
O from the computer.
Figure 3-17. Removing the DC-to-DC Board
14. To install the DC-to-DC board, reverse the process in the above
steps.
Disassembly and Options
3-24
Main Board
Notice: Use static precautions.
1. Remove
2. Remove
the battery pack as described earlier.
the memory module access panel as described later in
the “Memory Modules” section.
3. Remove the modem cover as described later in the “Modem”
section.
4, Remove
5. Remove
6. Remove
7. Remove
8. Remove
9. Remove
earlier.
10. Remove
11. Remove
12. Remove
the keyboard assembly as described earlier.
the cabinet top as described earlier.
the diskette drive as described earlier.
the hard disk drive as described earlier.
the expansion memory board as described earlier.
the expansion memory mounting bracket as described
the backup battery as described earlier.
the modem cable/connector as described earlier.
the DC-to-DC board as described earlier.
Disassembly and Options
3-25
13. Remove the modem frame © screws.
14. Lift the modem frame and the modem shield/insulator @ out of
the computer.
Figure 3-18. Removing the Modem Frame
Disassembly and Options
3-26
15. Disconnect the speaker cable from CN18 © and the PS/2 mouse
board cable from CN7 O on the main board O.
16. Turn the bottom assembly over and remove the screws below the
port bay door O.
17. Turn the bottom assembly over and remove the main board
screws.
18. Lift the main board out of the bottom assembly.
Figure 3-19. Removing the Main Board
19. To install the main board, reverse the process in the above steps.
Note: Make sure you transfer the math coprocessor (if installed) to
the new board.
Disassembly and Options
3-27
Cabinet
1.
2.
10.
11.
12.
13.
14.
15.
16.
17.
Bottom
Remove the battery pack as described earlier.
Remove the memory module access panel as described later in
the “Memory Modules” section.
Remove
Remove
section.
Remove
Remove
Remove
Remove
Remove
Remove
Remove
earlier.
Remove
Remove
Remove
Remove
the math coprocessor access panel.
the modem cover as described later in the “Modem”
the keyboard assembly as described earlier.
the cabinet top as described earlier.
the PS/2 mouse board as described earlier.
the diskette drive assembly as described earlier.
the hard disk drive assembly as described earlier.
the expansion memory board as described earlier.
the expansion memory mounting bracket as described
the backup battery as described earlier.
the modem cable/connector as described earlier.
the DC-to-DC board as described earlier.
the main board as described earlier.
Remove the port bay door as described later in the “Port Bay
Door” section.
To install the cabinet bottom, reverse the process in the above
steps.
Disassembly and Options
3-28
Port Bay Door
1. Open the port bay door D on the back of the computer.
2. Slightly bow the port bay door and remove it from the computer.
Figure 3-20. Removing the Port Bay Door
3. To install the port bay door, reverse the process in the above
steps.
Disassembly and Options
3-29
Option Installation
Memory Modules.
Notice: Use static precautions.
The computer's RAM can be expanded from 2M to 4M, 6M, or 8M by
installing one, two, or three 2M memory modules. The possible
memory configurations are listed in Table 3-1.
Table 3-1. Possible Memory Configurations
TOTAL
MEMORY BANK 1 BANK2 BANK3 DESCRIPTION
2M Factory setting
4M YES First expansion
6M YES YES Second expansion
8M YES YES YES Third expansion
Disassembly and Options
3-30
1. Remove the battery pack as described earlier.
2. Remove the memory module access panel O by pressing on the
sides and lifting. A screwdriver, inserted into the slot on the rear
of the cover, may be used to pry it off.
Figure 3-21. Removing the Memory Module Access Panel
Disassembly and Options
3-31
3. Select a memory module socket pair. Use the lowest bank
numbered socket pair available.
Figure 3-22. Selecting a Memory Module Socket Pair
Disassembly and Options
3-32
4. Align the memory module above the sockets, then firmly and
evenly press it into place.
Figure 3-23. Installing a Memory Module
5. Replace the memory module access panel.
6. Update the memory size in the Setup program.
7. Run the Advanced Diagnostics memory tests to thoroughly check
the memory module.
Disassembly and Options
3-33
Math Coprocessor
Notice: Use static precautions.
1. Remove the battery pack as described earlier.
2. Remove the math coprocessor access panel © by prying it up
with a small flat-bladed screwdriver.
Figure 3-24. Removing the Math Coprocessor Access Panel
Disassembly and Options
3-34
3. Carefully move the shielding to expose the coprocessor socket.
Notice: Do not crease the shielding. This could break the foil conductor.
4. Position the IC O above the socket @ so that the notched corner
of the IC and the notched corner of the socket are lined up, then
press the IC firmly into the socket.
Figure 3-25. Installing the Math Coprocessor
5. Replace the shielding and the math coprocessor access panel.
6. Turn the computer right side up.
7. To remove the math coprocessor, lift up on the corners with an
IC extraction tool.
Disassembly and Options
3-35
Modem
Notice: Use static precautions.
1. Make sure the computer is truly off and not just suspended.
2. Remove the battery pack as described earlier.
3. Remove the modem cover screws D and pull the modem cover ©
from the computer.
Figure 3-26. Removing the Modem Cover
4. Press the tabs 9 and remove the plug from the phone line hole.
Figure 3-27. Removing the Modem Cover Plug
Disassembly and Options
3-36
5. Slide the modem © into the computer. Be sure the modem is
fully inserted in its connector.
6. Replace the modem cover @.
Figure 3-28. Installing a Modem
7. Enter the new configuration information in the Setup program.
8. To remove the modem, reverse the process in the above steps.
Disassembly and Options
Specifications
Power
AC Adapter
Input 90 to 264 V ac at 48 to 62 Hz,
0.5A at 110 V ac,
0.3A at 240 V ac.
Output 22 V dc +10% at 1.27A.
AC Adapter Connector
PIN SIGNAL
1 Charge voltage
2 System voltage
3 Charge control
4 Ground
5 Ground
Internal DC Conversion
Input AC Adapter: +22 V dc +10% at 1.27A
Battery Pack: +14.4 V dc at 1.70A.
Output +5 Vdc +5% at 2.00A
—10 V dc +20% at 0.05A
—18 Y de +2 V dc at 0.03A
300 V ac £100 V ac 30kHz, 5 watts
maximum.
S-2
Battery Pack
Initial Charge Time
Normal Recharge
Time
Charge Current
Battery Pack Connector
+14.4 V de, 1.7 ampere hours, 24.48 watt
hours, with overcharge and short circuit
protection. Typical life is 1000
charge/discharge cycles.
10 hours.
3 hours.
Fast: 1.27A +15%
Normal: 0.27A +15%
Trickle: 0.08A +30%.
PIN SIGNAL
1 Output (14.4V/22V)
2 Ground
3 Error
4 System monitor (8V/12V)
5439] > Trickle charge/fast charge
(8V/12V)
Backup Battery
+4.8 V dc, 0.6 amperes, 2.88 watt hours,
NiCad backup battery provides backup
power to real-time clock and CMOS
memory. It also provides power to the
computer while in rest mode.
Specifications
S-3
LED Indicators
Power
Diskette Drive
AMBER — Indicates the computer is
operating under AC power.
GREEN — Indicates the computer is
operating under battery power.
RED (flashing) — Indicates the battery
pack 1s almost discharged.
RED (steady) — Indicates the battery pack is
fully discharged.
NA
Hard Disk Drive
GREEN — Indicates floppy disk drive
activity.
O
~ | 7
Charge Status
GREEN — Indicates hard disk drive activity.
a [Г ")
GREEN — Indicates the battery pack is
fully charged or not installed.
AMBER — Indicates the battery pack is
being charged.
RED — Indicates the battery pack may be
faulty.
Specifications
S-4
Processors
Standard
Type Intel 80386SL.
Clock Speed 25 MHz or 6.25 MHz. Slow mode runs at
6.25 MHz for compatibility and power
conservation.
Optional
Type Intel 80387SX or 80387SL math
coprocessors.
Clock Speed 25 MHz.
Specifications
S-5
Memory
System Board
RAM
EMS
Cache
Bootstrap ROM
Flash ROM
EEPROM
CMOS
2M dynamic RAM standard, expandable to
8M using 2M expansion modules.
OK LIM 4.0, expandable to 7M.
64K static RAM.
128K; stores startup code and initial
hardware configuration information.
128K; stores BIOS code and Monitor
program code; functionality is transferred
to RAM at power up.
Provides nonvolatile password and
hardware configuration information
storage.
256 bytes in the 82360SL I/O controller IC;
battery backup; used for storage of
configuration data.
Specifications
S-6
Memory Map
6M
BOOTSTRAP ROM 128K
FLASH ROM 128K
EXTENDED
OR EXPANDED
USER MEMORY
39K
USER RAM AREA
INTERRUPT VECTORS 1K
10000: 0000
FECOO: 0000
FCOO: 0000
639K
0000: 0400
0000: 0000
SYSTEM BIOS СОРЕБОК
(SLUSHED)
SCRATCHPAD RAM 4K
UNUSED 160K
LITE BASIC 8K
VIDEQ BIOS CODE 24K
(SLUSHED)
VGA VIDEO RAM 128K
EXTENDED BIOS TK
DATA SEGMENT
10000: 0000
F 000: 1000
F 000: 0000
C000: 8000
C000: 6000
СООО: 0000
A000: 0000
9000: FCOO
Specifications
Input/Output
Serial
Serial Connector
One RS-232C asynchronous, male, serial
port; configurable as COM1 or СОМ2;
supports baud rates of 50 to 19,200;
selectable protocols.
2
SIGNAL
Carrier detect (CD)
Receive data (RXD)
Transmit data (TXD)
Data terminal ready (DTR)
Ground (GND)
Data set ready (DSR)
Request to send (RTS)
Clear to send (CTS)
Ring indicator (RI)
O O YI © WE WN =
Specifications
S-8
Parallel
Parallel Connector
One Centronics-type, female, bidirectional
port; configurable as LPT1 or LPT2.
PIN SIGNAL
1 Strobe
2-9 Data bits 0-7
10 Acknowledge
13 | 11 Busy
Conan) 12 Paper out
000000000000 13 Select
25 М 14 Auto feed
15 Error
16 Initialize
17 Select input
18-25 Ground
Specifications
S-9
Mouse Port
Connector
Adapter (optional)
Mouse Port Connector
Interface connector provides 100% support
for PS/2-compatible pointing device.
Permits the user to connect a full-size
AT-compatible keyboard or a keypad.
PIN SIGNAL
1 Serial data
ç 2 Not connected
ао + 3 Ground
AE 4 +5 V de
5 Clock
6 +5 V dc
Specifications
S-10
Video
Compatibility
Video Display
Memory
LCD Display
External Monitor
Horizontal Scan
Vertical Scan
Signal Type
100% VGA register- and BIOS-level
compatible.
256K DRAM.
640 x 480 pixel black and white
transmissive liquid crystal display with cold
cathode fluorescent (CCFL) backlighting.
32 shades of gray supported.
31.49 kHz.
60 to 70 Hz.
Analog RGB, 0 to 0.714 V; 75 Q impedance
0 volts represents black.
External VGA Monitor Video Connector
PIN SIGNAL
1 Red analog video output
2 Green analog video output
3 Blue analog video output
4 Not connected
5 Ground
6 Ground
7 Ground
8 Ground
9 No pin in connector
10 Ground
11 Not connected
12 Not connected
13 Horizontal sync control
14 Vertical sync control
15 Not connected
Specifications
S-11
Disk Drives
Hard Disk Drive Supports one 2.5-inch 85M hard disk drive,
type #102.
Diskette Drive Supports one 3.5-inch 1.4M internal
diskette drive.
Power Connectors
Backlight Power Connector
This connector is labeled CN4, and is
located on the DC-to-DC board.
|
Backlight Power Connector
PIN SIGNAL
1 AC (300V)
2 NC
3 NC
4 Ground
Specifications
S-12
System Power Connector
This connector is labeled CN604, and is
located on the DC-to-DC board.
coos Ddzezazozt
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System Power Connector
PIN SIGNAL
1 Battery dead
2 System VCC (5V normal, OV rest)
3 Backlight on command
4 System VCC (5V normal, OV rest)
5 Power management VCC On command
6 Power management VCC (5V)
7 System VCC on command
8 Power management VCC (5V)
9 Modem enable command
10 Modem (-10V)
11 LCD power command
12 Battery error
13 Contrast
14 VEE (-18V)
15 Brightness
16 DC in (22V)
17 Trickle charge/fast charge (8V/12V)
18 Battery voltage (14.4V normal, 22V charging)
19 2-hour charge command
20 Backup battery voltage (4.8V)
21 Ground |
22 Ground
23 Ground
24 Ground
Specifications
Keyboard
Keyboard LEDs
S-13
CAPS NUM PAD SCROLL
LOCK LOCK LOCK LOCK
C1 C1 C1
CAPS LOCK, NUM LOCK, PAD LOCK, and
SCROLL LOCK. These green LEDs provide a
visual indication of the status of the keys.
Cabinet
Dimensions
Width 12.4 inches (315 mm).
Depth 8.27 inches (210 mm).
Height
Lid Closed: 1.83 inches (46.5 cm).
Weight
Computer 6.8 lbs (3.08 kg) with battery pack.
Specifications
S-14
Environmental
Temperature
Operating
Non-operating
Gradient
Humidity
41 to 95°F (5 to 35°C).
—4 to 140°F (-20 to 60°C).
20 C/hr maximum.
Operating
Non-operating
Altitude
10% to 80% relative humidity
(non-condensing).
10% to 80% relative humidity
(non-condensing).
Operating
Non-operating
Audio
Speaker
—200 feet to 10,000 feet (—60 to 3,000
meters).
—200 feet to 40,000 feet (-60 to 12,000
meters).
Single channel through a miniature piezo
transducer.
Specifications
Printed in the United States of America
S42G-0485-00
P42G0O485
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