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222 pages, 7.76 Mb
NB250/NB2
55 Series Mai
ntenance M
anual
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Contents
Main
Toshiba Personal Computer NB250/NB255 Maintenance Manual
TOSHIBA CORPORATION
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Preface
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Table of Contents
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Chapter 1 Contents
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1.1 Features
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1.1 Features 1 Hardware Overview
Compal Electronics, Inc.
NB250/NB255 Maintenance Manual 1-5
KAVAA LA-5121P M/B
Block Diagrams
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1.2 2.5-inch HDD
1.3 Power Supply
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1.4 Batteries
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Chapter 2 Contents
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2.1 Troubleshooting Introduction
2.2 Troubleshooting Flowchart
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2 Troubleshooting Procedures
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Figure 2-1 Troubleshooting flowchart (1/2)
2 Troubleshooting Procedures
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Figure 2-1 Troubleshooting flowchart (2/2)
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2 Troubleshooting Procedures
2.3 Power Supply Troubleshooting
END
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AC adaptor System board Battery
A C adaptor cord AC power cord
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2 Troubleshooting Procedures
2.4 Display Troubleshooting
Figure 2-3 Display troubleshooting process
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2 Troubleshooting Procedures
2.5 Keyboard Troubleshooting
Figure 2-4 Keyboard troubleshooting process
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2.5 External USB Devices Troubleshooting
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2.6 TouchPad Troubleshooting
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232 Troubleshooting Procedures
NB200 Series Maintenance Manual
2.7 Speaker Troubleshooting
Figure 2-7 Speaker troubleshooting process
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2.6 Wireless LAN Troubleshooting
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2.7 Camera Troubleshooting
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2.8 Bluetooth Troubleshooting
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2.9 2in1 card Troubleshooting
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2.10 HDD/SSD Troubleshooting
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2.13 CRT Troubleshooting
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2.14 LAN Troubleshooting
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2.16 3D Sensor Troubleshooting
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2. 17 3G Troubleshooting
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3.1 The Diagnostic Test
3.2 Executing the Diagnostic Test
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3.3 Display Configuration
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3.6 Main Battery Charge Test
3. 7 FDD Test
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3.10 Mouse (Pad) Test
3.11 LCD Pixels Mode Test
3.12 Magnetic Switch Test
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3.13 LAN Test
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3.14 RTC Test
3.15 3D G-sensor test
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3.16 1st HDD Test
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3.17 Read DMI
3.18 Write DMI
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3.19 Toshiba Logo set
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3.21 TP TYPE R/W TEST
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3.22 EEPROM Setting
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Chapter 4 Contents
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4.1 General
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4.2 Battery
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4.3 HDD
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4.4 Memory
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4.5 WLAN Card
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4.6 Hinge Cover and Keyboard
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4.7 Power Board
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4.8 Logic Upper Assembly
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4.9 Speaker
4.10 Touch Pad
4.11 Motherboard
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4.12 Thermal Fan Module
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4.13 LCD Bezel Assembly
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4.14 LCD Module
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4.15 Camera module LVDS cable
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Appendix A Handling the LCD Module
Precautions for handling the LCD module
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Appendix B Board Layout
B.1 System Board Top View
B.2 System Board Bottom View
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Appendix C Pin Assignments
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C.5 JWLAN
Table C-5 WLAN/WiMax Connector pin assignments (52-pin)
C.6 JLAN
C.7 JDDR1
Table C-7 SODIMM I/F pin assignments (204-PIN) (2/4)
Table C-7 SODIMM I/F pin assignments (204-PIN) (3/4)
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C.8 JMIC
C.9 JLINE
C.10 JKB
C.11 JUSBA
C.12 JUSBB
C.13 JUSBC
C.14 JPOWER
C.15 JCARD
C.16 JEXMIC
C.17 JSPKR
C.18 JT OUCH
Appendix D Keyboard Scan/Character Codes
Table D-1 Scan codes (set 1 and set 2) (1/4)
Table D-1 Scan codes (set 1 and set 2) (2/4)
Table D-1 Scan codes (set 1 and set 2) (3/4)
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Table D-3 Scan codes in Numlock mode
Table D-4 Scan codes with Fn key
Note: 8. * Refer to Table D-7, No. 126 key scan code.
Table D-5 Scan codes in overlay mode
Table D-6 No.124 key scan code
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NB250/NB255 Series Maintenance Ma nual
F-1
Appendix F Series Screw Torque List (PAV10)
Table F-1 Series Screw Torque List
SCREW P/N SCREW SPEC Q'ty LOCATION SCREW TORQUE
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Appendix G Reliability
