Toshiba NB255 - Manuals

NB250/NB255 Series Maintenance Manual v Some operations require you to simultaneously use two or more keys. We identify such operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause (Break) means you must hold down Ctrl and at the same time press Pause (Break) . If t...

NB250/NB255 Series Maintenance Manual vi Table of Contents Chapter 1 Hardware Overview 1.1 Features ............................................................................. Error! Bookmark not defined. 1.2 2.5-inch HDD .................................................................... Error! ...

NB250/NB255 Series Maintenance Manual vii Chapter 3 Tests and Diagnostics 3.1 The Diagnostic Test ............................................................. Error! Bookmark not defined. 3.2 Executing the Diagnostic Test ............................................. Error! Bookmark not defined. 3....

NB250/NB255 Series Maintenance Manual viii Chapter 4 Replacement Procedures 4.1 General .............................................................................. Error! Bookmark not defined. Safety Precautions ............................................................. Error! Bookmark not def...

NB250/NB255 Series Maintenance Manual x Figures Figure 4.1 Removing the Battery Pack ................................... Error! Bookmark not defined. Figure 4.2 Removing the HDD door ....................................... Error! Bookmark not defined. Figure 4.3 Removing the HDD from the HDD bay ......

NB250/NB255 Series Maintenance Manual xi Figure 4.31 Removing the screws from the LCD module ....... Error! Bookmark not defined. Figure 4.32 Removing the LCD Hinge Assembly ................... Error! Bookmark not defined. Figure 4.33 Removing the Camera from the LCD panel ......... Error! Bookmark ...

1 Hardware Overview NB250/NB255 Maintenance Manual 1-ii Chapter 1 Contents 1.1 Features .................................................................................................................. 1-1 1.2 2.5-inch HDD ...............................................................................

1.1 Features 1 Hardware Overview NB250/NB255 Maintenance Manual 1-1 1.1 Features The Toshiba NB200 is a small-size PC notebook equipped with an Intel ® Atom TM Processor, providing high-speed processing capabilities and advanced features. The computer employs a lithium ion battery that allows it to ...

1 Hardware Overview 1.1 Features  Figure 1-1A shows the computer and its system unit configuration. External monitor port Thermal vent holes USB ( USB Sleep and Charge function is supported by this port only. ) Figure 1-1A ID Parts Description Placement Part A NB250/NB255 Maintenance Manual 1-4

1 Hardware Overview 1.2 2.5-inch HDD 1.2 2.5-inch HDD The computer contains a low-profile and light-weight, high-performance HDD. The HDD interface conforms to Serial ATA. Storage capacities supported are 120 and 160 GB. The HDD is shown in Figure 1-2 and some of its specifications are listed in Tab...

1.3 Power Supply 1 Hardware Overview NB250/NB255 Maintenance Manual 1-9 1.3 Power Supply The power supply unit provides constant voltage (19V) for the system board and performs the following functions: 1. Power input monitor  Checks whether the AC adapter (DC power supply) is connected to the compu...

1.4 Batteries 1 Hardware Overview NB250/NB255 Maintenance Manual 1-11 1.4 Batteries The computer has the following two types of batteries:  Main Battery Pack  Real Time Clock (RTC) Battery 1.4.1 Main Battery The main battery pack serves as the computer's main power source when the AC adapter is no...

1 Hardware Overview 1.4 Batteries NB250/NB255 Maintenance Manual 1-12 NOTE: The time required for normal charge depends on the power consumption by the system. Using a fluorescent lamp and frequently accessing the disk consumes more power and lengthens the charge time. Any of the following can stops...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 1 Chapter 2 Contents 2.1 Troubleshooting Introduction ......................................................................................3 2.2 Troubleshooting Flowchart.................................................................

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 2 Figures Figure 2-1 Troubleshooting flowchart (1/2) ....................................................................... 5 Figure 2-1 Troubleshooting flowchart (2/2) ..................................................................

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 3 2.1 Troubleshooting Introduction Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the computer is causing the computer to malfunction. The FRUs covered are: 1. Display 7. Wireless LAN 13. External ODD 2. HD...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 9 2.3 Power Supply Troubleshooting S T A R T A r e th e D C - I N a n d B a tt e r y L E D s li t? C a n y o u tu r n th e c o m p u te r o n ? A r e t h e in te r n a l p o w e r c o n n e c tio n s s e c u r e ? E N D C h e c k P o...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 10 as instructed. The flowchart in Figure 2-2 gives a summary of the process. The procedures described in this section are: Procedure 1: Power status check Procedure 2: Adaptor / battery replacement Procedure 3: Power supply connecti...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 11 Table 2-2 DC-IN LED DC-IN LED Power supply status Solid on AC power exists (LED is Green). Off No AC power exists. To check the power supply status, install a battery pack and connect an AC adaptor to the DC-IN port on the compute...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 12 Procedure 3 Power supply connection check The power supply wiring diagram is shown below: AC adaptor System board Battery AC adaptor cord AC power cord Any of the connectors may be disconnected. Perform Check 1. Check 1 Disconnect...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 13 Procedure 4 Diagnostic check The power supply may not charge the battery pack. Perform the following procedures: 1. Reinstall the battery pack. 2. Attach the AC adaptor and turn on the power. If you cannot turn on the power, go to...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 14 2.4 Display Troubleshooting P e r f o r m e x t e r n a l d i s p l a y c h e c k ( P r o c e d u r e 1 ) S T A R T D o e s t h e e x t e r n a l d i s p l a y f u n c t i o n o k ? P e r f o r m d i a g n o s t i c c h e c k ( P ...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 15 This section describes how to determine if the computer’s display is functioning properly. The process is outlined in Figure 2-3. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: External d...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 16 Procedure 3 Connector and replacement check The LCD module and system board are connected to the display circuits. Any of these components may be damaged. Refer to Chapter 4, Replacement Procedures, for instructions on how to disa...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 17 2.5 Keyboard Troubleshooting P e r f o r m e x t e r n a l k e y b o a r d c h e c k ( P r o c e d u r e 1 ) S T A R T D o e s t h e e x t e r n a l k e y b o a r d f u n c t i o n o k ? P e r f o r m d i a g n o s t i c c h e c k...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 18 To determine if the computer’s keyboard is functioning properly, perform the following procedures. Figure 2-5 outlines the process. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: External...

2 Troubleshooting Procedures NB250/NB255 Series Maintenance Manual 19 2.5 External USB Devices Troubleshooting R e p l a c e s y s t e m b o a r d ( P r o c e d u r e 2 ) E N D O r i g i n a l U S B d e v i c e i s f a u l t y P e r f o r m e x t e r n a l d e v i c e a n d c o n n e c t i o n c h e...

2 Troubleshooting Procedures NB200 Series Maintenance Manual 21 2.6 TouchPad Troubleshooting START END TouchPad connection check (Procedure 1) TouchPad replacement check (Procedure 2) Replace system board Figure 2-6 Touchpad troubleshooting process

2 Troubleshooting Procedures NB200 Series Maintenance Manual 22 To determine if the computer’s built-in TouchPad is functioning properly, perform the following procedures. Figure 2-9 outlines the process. Start with Procedure 1 and continue as instructed. Procedure 1: TouchPad connection check Proce...

23 2 Troubleshooting Procedures NB200 Series Maintenance Manual 23 2.7 Speaker Troubleshooting S T A R T D o a l l s o u r c e s h a v e s a m e p r o b l e m ? E N D P e r f o r m e a r p h o n e t e s t ( P r o c e d u r e 2 ) D o e a r p h o n e s f u n c t i o n c o r r e c t l y ? P e r f o r m...

25 2 Troubleshooting Procedures NB200 Series Maintenance Manual 25 2.6 Wireless LAN Troubleshooting S T A R T P erform d iagnostic test (P rocedu re 1) W as a w ireless LA N problem d elected? P erform conn ecto r and replacem ent check (P rocedu re 2) R eplace w ireless LA N antenna/u nit R eplace ...

26 2 Troubleshooting Procedures NB200 Series Maintenance Manual 26 computer’s wireless LAN system is functioning properly, perform the following procedures. Figure 2-15 outlines the process. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Diagnostic test Pro...

27 2 Troubleshooting Procedures NB200 Series Maintenance Manual 27 2.7 Camera Troubleshooting Figure 2-9 Camera troubleshooting process

29 2 Troubleshooting Procedures NB200 Series Maintenance Manual 29 2.8 Bluetooth Troubleshooting Figure 2-10 Bluetooth troubleshooting process

31 2 Troubleshooting Procedures NB200 Series Maintenance Manual 31 Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. 2.9 2in1 card Troubleshooting START Do errors occur during 2 IN 1 CARD test? Perform 2 IN 1 card socket replacement check (Pr...

36 2 Troubleshooting Procedures NB200 Series Maintenance Manual 36 2.13 CRT Troubleshooting P e r f o r m C R T c o n n e c t i o n c h e c k ( P r o c e d u r e 1 ) S T A R T D o e s r e p l a c e m e n t C R T c a b l e f u n c t i o n p r o p e r l y ? P e r f o r m C R T s e t c h e c k ( P r o ...

38 2 Troubleshooting Procedures NB200 Series Maintenance Manual 38 2.14 LAN Troubleshooting P e r f o r m L A N c o n n e c t i o n c h e c k ( P r o c e d u r e 1 ) S T A R T D o e s r e p l a c e m e n t L A N c a b l e f u n c t i o n p r o p e r l y ? P e r f o r m L A N s e t c h e c k ( P r o ...

39 2 Troubleshooting Procedures NB200 Series Maintenance Manual 39 Procedure 1: LAN connection check Procedure 2: LAN set check Procedure 1 LAN connection check The LAN cable may be damaged or the connections may be loose. Perform Check 1: Check 1 Make sure LAN cable is firmly plugged into both the ...

41 2 Troubleshooting Procedures NB200 Series Maintenance Manual 41 Procedure 2: Connector and replacement check Procedure 1 Diagnostic test Run the functioning Program on Windows model, which will display the MIC test result. If tests and diagnostics result abnormal go to Procedure 2. If an error is...

44 2 Troubleshooting Procedures NB200 Series Maintenance Manual 44 2. 17 3G Troubleshooting S T A R T P e r f o r m d ia g n o s ti c t e s t ( P r o c e d u r e 1 ) W a s a 3 G p r o b le m d e t e c te d ? P e r f o r m c o n n e c to r a n d r e p l a c e m e n t c h e c k ( P r o c e d u r e 2 )...

3. Tests and Diagnostics 1 Chapter 3 Tests and Diagnostics

3. Tests and Diagnostics 3 3.1 The Diagnostic Test This chapter explains how to use the Test & Diagnostic program to test the functions of the (Base on Buffalo 10A/10B/10C/10BL T&D version 1.3) hardware modules. The Test & Diagnostic Program is stored on the T&D diskettes. The progra...

3. Tests and Diagnostics 4 3.2 Executing the Diagnostic Test DOS is required to run the DIAGNOSTICS PROGRAM. To start the DIAGNOSTIC PROGRAM, follow these steps: Insert the diagnostics USB disk drive and turn on the computer. (The diagnostics diskette contains the DOS boot files.) And then follow th...

3. Tests and Diagnostics 3.3 Display Configuration This Item will show the unit configuration. It includes:  CPU (CPU type)  DDRAM SIZE  Panel ID  HDD1 type & capacity (Vendor ID. Model .Firmware)  VRAM size / VGA CHIP TYPE  Battery cell (3cell;6cell)  Wireless type  LAN Type  Bluetooth...

3 Tests and Diagnostics 3.4 Audio sound test The audio sound test allows the user to aurally confirm the speaker functions. And the speaker will send out music during test. NOTE: Remember to tune up the volume as “Maximum” before this test starts. Buffalo only have one speaker, no need test Left/Rig...

3. Tests and Diagnostics 3.6 Main Battery Charge Test NOTE: The AC adaptor should be connected to successfully run this test . 30W with 19V DC for ALL SKU This test shows and measures the main battery:  Battery type (Lion)  Manufacturer (Sanyo/Panasonic/Sony)  Remain charge capacity (0 ~ 100%)  ...

3 Tests and Diagnostics 3.8 Memory check This test will check if the computer’s Memory Frequency and Size is correct in every slot. Before Memory test start, you should choice the below item: 1. Memory Read test 2. Memory Write test 3. Memory Read & Write test 4. Memory INFO test 3. 9 Keyboard T...

3. Tests and Diagnostics The Touch Pad button subtest allows users to test their Touch Pad buttons. If the buttons are clicked, the cursors should appear in the corresponding box of the button figure that is displayed on the screen as below. After checking T/Pad buttons and cursor’s function, use “T...

3. Tests and Diagnostics 640*480 (2/16/256 colors), 800*600 (256 colors) and 1024*768 (256 colors). The screen should display as below, indicating whether the test is passed or failed after the question. 3.12 Magnetic Switch Test The Magnetic switch test checks the Magnetic function of the unit. Whe...

3. Tests and Diagnostics Set method of PC <4> Front Uppe r Test 5: Set method of PC <5> Uppe r Left Test Result A test result is displayed when a test is completed. A display of result is O.K. or NG. And an error flag is returned at the end of a program. 26

3. Tests and Diagnostics 3.16 1 st HDD Test The HDD test allows the user to verify the 1 st HDD ok or not. First, please select HDD test method, Screen would display as below: After you select the method, then input password: “hard disk”, if input password is Right, the screen would display as below...

3. Tests and Diagnostics NOTE: should input correct DMI data, and should reboot the system that can make the setting effective. 3.19 Toshiba Logo set Set the computer’s Toshiba Logo for other region except Japan SKU. The screen should display as below, indicating whether the test is passed or failed...

3. Tests and Diagnostics If an error is detected and a test fails, the following message displays: 3.20 Dynabook Logo set Set the computer’s Dynabook Logo for Japan SKU. 35

4 Replacement Procedures NB250/NB255 Maintenance Manual 4-ii Chapter 4 Contents 4.1 General ................................................................................................................... 4-1 Safety Precautions ........................................................................

4.1 General 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-1 4.1 General This chapter explains how to disassemble the laptop and replace Field Replaceable Units (FRUs). Some replacement procedures may not require you to remove all the surrounding FRUs to replace only one FRU. The chart be...

4 Replacement Procedures 4.1 General NB250/NB255 Maintenance Manual 4-2 Safety Precautions Before you begin disassembly read the following safety precautions carefully. Be sure to follow them while you are working. DANGER: 1. Always use the original batteries or replacement batteries authorized by T...

4 Replacement Procedures 4.1 General NB250/NB255 Maintenance Manual 4-4 Before You Begin Before you begin to disassemble the laptop, keep in mind the precautions and advice in this section. Always begin disassembly by removing the AC adapter and battery pack. Remove the optional parts and accessorie...

4.1 General 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-5 Disassembly Procedures The cable connectors come in these two basic types:  Pressure plate connectors  Normal pin connectors To remove a pressure plate connector, pull up the tabs on either side of the connector's plastic pres...

4 Replacement Procedures 4.1 General NB250/NB255 Maintenance Manual 4-6 Tools and Equipment For your safety and that of other people in the working environment, it is strongly recommended that you use electrostatic discharge (ESD) equipment. The proper use of this equipment will ensure successful re...

4.1 General 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-7 Colors of Screw Shanks For easy identification of the correct screws, the screw shanks are colored according to their lengths, as follows:  Screws of an odd-numbered length Blue  Screws of a special length Black (Screws of a s...

4 Replacement Procedures 4.2 Battery NB250/NB255 Maintenance Manual 4-8 4.2 Battery Removing the Battery Pack Remove the battery pack according to the following procedures and Figure 4.1. CAUTION: When handling the battery packs, use care not to short circuit the terminals. Do not drop, hit, twist, ...

4.2 Battery 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-9 Installing the Battery Pack Install the battery pack according to the following procedures. CAUTION: The battery packs contain a lithium ion battery, which can explode due to improper replacement, use, handling, or disposal. Alw...

4 Replacement Procedures 4.3 HDD NB250/NB255 Maintenance Manual 4-10 4.3 HDD Removing the HDD CAUTION: Do not press on the top or bottom of the drive. Applying such pressure can either corrupt the data in the drive or damage the drive. Remove the HDD (hard disk drive) according to the following proc...

4 Replacement Procedures 4.3 HDD NB250/NB255 Maintenance Manual 4-12 5. To separate the plate from the HDD, remove four M3x3 screws as shown in Figure 4.4. Figure 4.4 Removing the HDD plate CAUTION: Do not apply pressure to the top or bottom of the drive. Installing the HDD Install the HDD according...

4.4 Memory 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-13 4.4 Memory Removing the Optional Memory Remove the optional memory according to the following procedures and Figure 4.5 and 4.6 after checking that the laptop is turned off. CAUTION: Remove the optional memory after turning off ...

4 Replacement Procedures 4.4 Memory NB250/NB255 Maintenance Manual 4-14 4. Spread out the two memory lock latches so that the memory pops up. Please follow the procedure as shown in Figure 4.6. Figure 4.6 Removing the RAM from the laptop 5. Pull the memory up and out at an angle, using care to avoid...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-15 4.5 WLAN Card Removing the WLAN Card Remove the WLAN card according to the following procedures and Figure 4.7. 1. Detach the two antennas on the WLAN card. 2. Remove two M2x3 screws that secure the WLAN card as shown in Figu...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-16 Installing the WLAN Card Install the WLAN card according to the following procedures. 1. Insert the WLAN card into the connector. 2. Press the card down and secure it with two M2x3 screws. 3. Attach the two antennas to the WL...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-17 4.6 Hinge Cover and Keyboard Remove the Hinge Cover and Keyboard according to the following procedures and Figure 4.8, 4.9 and 4.10. 1. Remove the following twelve screws as shown in Figure 4.8:  seven M2.5x6 screws  five M...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-18 Removing the Hinge Cover Remove the hinge cover according to the following procedures. 1. Use your fingers to unclasp three hinge cap hooks as indicated in Figure 4.9. Figure 4.9 Detaching three hinge cap hooks 2. Turn the la...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-19 Removing the Keyboard Remove the Keyboard according to the following procedures and Figure 4.11. 1. Open the laptop. 2. Unfasten the four hooks on the sides of the logic upper assembly. Lift up the keyboard and remove the cab...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-20 Installing the Hinge Cover and Keyboard Install the hinge cover and keyboard according to the following procedures. 1. Attach the cable from the underside of the keyboard to the connector on the logic upper assembly. 2. Seat ...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-21 4.7 Power Board Removing the Power Board Remove the power board according to the following procedures and Figure 4.12. 1. Use tweezers to release the latches on the left and right sides of the connector by pushing in the dire...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-22 Installing the Power Board Install the power board according to the following procedures. 1. Seat the power board in the correct position on the logic upper assembly. 2. Slide the power board to the end of the track until the...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-23 4.8 Logic Upper Assembly Removing the Logic Upper Assembly Remove the logic upper assembly according to the following procedures and Figure 4.13, 4.14, 4.15, 4.16 and 4.17. 1. Remove four 2.5x6 screws from the logic upper ass...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-27 7. Remove the LCD display assembly from the logic assembly. 8. Detach the Touch Pad cable and the Thermal Fan cable as shown in Figure 4.17. (Detach the touch pad cable by using tweezers to push the left and right latches of ...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-29 4.9 Speaker Removing the Speaker Remove the Speaker according to the following procedures and Figure 4.18. 1. Remove two M2.5x7.7 screws as shown in Figure 4.18. 2. Detach the speaker cable from the motherboard and remove the...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-30 4.10 Touch Pad Removing the touch pad bracket Remove the touch pad bracket according to the following procedures and Figure 4.19. 1. Remove two M2.5x2.5 screws from the touch pad bracket as shown in Figure 4.19. Figure 4.19 R...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-31 4.11 Motherboard Removing the Motherboard Remove the motherboard according to the following procedures and Figure 4.20, 4.21, 4.22 and 4.23. 1. Remove two M2.5x4 screws and FAN cable from the motherboard as indicated by the a...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-34 Installing the Motherboard Install the motherboard according to the following procedures and Figures 4.24 and 4.25. 1. Before seat the motherboard on the logic lower assembly, pull out the any cables to avoid them being press...

4 Replacement Procedures 4.5 WLAN Card NB250/NB255 Maintenance Manual 4-36 4.12 Thermal Fan Module Removing the Thermal Fan Module Remove the thermal fan module according to the following procedures and Figures 4.26 and 4.27. CAUTION: When removing the thermal fan module, keep the following in mind:...

4.5 WLAN Card 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-37 Installing the Thermal Fan Module Install the Thermal Fan Module according to the following procedures and Figure 4.27. 1. Apply a new thermal pad on the thermal fan module as shown in Figure 4.27. If you use a new thermal fa...

4 Replacement Procedures 4.13 LCD Bezel Assembly NB250/NB255 Maintenance Manual 4-38 4.13 LCD Bezel Assembly Removing the LCD Bezel Assembly Remove the LCD bezel assembly according to the following procedures and Figures 4.28, 4.29 and 4.30. 1. Remove the two mask seals that cover the screws. 2. Rem...

4 Replacement Procedures 4.13 LCD Bezel Assembly NB250/NB255 Maintenance Manual 4-40 Installing the LCD Bezel Assembly Install the LCD bezel assembly according to the following procedures. NOTE: Take extra care in routing cables and antennas on the LCD module. Improperly routed cables can become pin...

4.14 LCD Module 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-41 4.14 LCD Module Removing the LCD Module Remove the LCD module according to the following procedures and Figures 4.31 and 4.32. 1. Remove four M2.5x4 screws securing the LCD module to the LCD cover assembly. 2. Pull up the c...

4.14 LCD Module 4 Replacement Procedures NB250/NB255 Maintenance Manual 4-43 Installing the LCD Module Install the LCD module according to the following procedures. 1. Seat the LCD hinges in the correct positions on the LCD panel and secure them with four M2x3 screws. 2. Seat the LCD module in the c...

4 Replacement Procedures 4.15 Camera module LVDS cable NB250/NB255 Maintenance Manual 4-44 4.15 Camera module LVDS cable Removing the Camera module and LVDS Cable Remove the Camera module and LVDS cable according to the following procedures and Figures 4.33 and 4.34. 1. Turn the LCD panel over and p...

4 Replacement Procedures 4.15 Camera module LVDS cable NB250/NB255 Maintenance Manual 4-46 Installing the Camera module and LVDS Cable Install the camera module and LVDS cable according to the following procedures. NOTE: Take extra care in routing cables and antennas on the LCD module. Improperly ro...

Appendix A Appendix A Handling the LCD Module Precautions for handling the LCD module The LCD module can be easily damaged during assembly or disassembly. Observe the following precautions when handling it to prevent damaging it. 1. When installing the LCD module in the display assembly, make sure t...

Appendix B Appendix B Board Layout B.1 System Board Top View JLVDS JPOWER JMIC JKB U35 U36 U4 JCARD JFAN JTOUCH U29 JSPKR Figure B-1 System Board Layout (Top) NB250/NB255 Series Maintenance Manual [CONFIDENTIAL] B-1

B.2 System Board Bottom View Figure B-2 System Board Layout (Bottom) JWLAN UL3 UL1 UC1 U15 JLAN JLINE JEXMIC JCRT U2 PJP2 UA2 JDDR1 JSATA PJP1 U1 JUSBC JUSBB JUSBA B-2 [CONFIDENTIAL] NB250/NB255 Series Maintenance Manual

Table B-1 System Board ICs (top and bottom) Number Name U1 Intel Atom_ U2 Thermal Sensor_EMC1402 U4 Clock Generator_RTM875N-397-GR U15 South Bridge_Intel NM10 U29 EC_KB926QFE0 U35 FAN Control IC_APL5607KI-TRG U36 BIOS ROM UA2 Codec_ALC259-VB5-GR UC1 Card Reader_RTS5138-GR UL1 10/100 LAN_RTL8105E-GR ...

C. Appendix C Pin Assignments System Board C.1 JFAN Table C-1 FAN I/F pin assignments (3-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 +FAN1 2 FAN_SPEED1 3 GND C.2 JLVDS Table C-2 LVDS I/F pin assignments (20-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 +LEDVDD 2 NC 3 +LCDVDD_L 4 ...

C.3 JCRT Table C-3 CRT pin assignments (15-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 CRT_R_L 2 CRT_G_L 3 CRT_B_L 4 NC 5 GND 6 GND 7 GND 8 GND 9 +CRT_VCC 10 GND 11 NC 12 CRT_DDC_DAT 13 HSYNC 14 VSYNC 15 CRT_DDC_CLK C.4 JSATA Table C-4 HDD I/F pin assignments (22-pin) Pin No. Signal name ...

C.5 JWLAN Table C-5 WLAN/WiMax Connector pin assignments (52-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 NC 2 +3V_WLAN 3 WLAN_BT_DATA 4 GND 5 WLAN_BT_CLK 6 +1.5VS 7 WLAN_CLKREQ# 8 LPC_FRAME#_R 9 GND 10 LPC_AD3_R 11 CLK_PCIE_WLAN# 12 LPC_AD2_R 13 CLK_PCIE_WLAN 14 LPC_AD1_R 15 GND 16 LPC_AD...

C.6 JLAN Table C-6 LAN Connector pin assignments (12-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 RJ45_MIDI0+ I/O 2 RJ45_MIDI0- I/O 3 RJ45_MIDI1+ I/O 4 NC 5 NC 6 RJ45_MIDI1- I/O 7 NC 8 NC 9 +3V_LAN 10 LAN_SK_LAN_LINK# 11 +3V_LAN 12 LAN_ ACTIVITY# C-4 [CONFIDENTIAL] NB250/NB255 Series Maint...

C.8 JMIC Table C-8 Internal Microphone Connector pin assignments (2-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 INT_MIC 2 AGND C.9 JLINE Table C-9 HEADPHONE Connector pin assignments (6-pin) Pin No. Signal name I/O Pin No. Signal Name I/O 1 AGND 2 HP_L_R 3 HP_R_R 4 NBA_PLUG 5 AGND 6 NC C....

Appendix D Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (1/4) Code set 1 Code set 2 Cap No. Keytop Make Break Make Break Note 01 ‘ ~ 29 A9 0E F0 0E 02 1 ! 02 82 16 F0 16 03 2 @ 03 83 1E F0 1E 04 3 # 04 84 26 F0 26 05 4 $ 05 85 25 F0 25 06 5 % 06 86 2E F0 2E 07 6 ^ ...

Table D-1 Scan codes (set 1 and set 2) (4/4) Code set 1 Code set 2 Cap No. Keytop Make Break Make Break Note 122 F11 57 D7 78 F0 78 *3 123 F12 58 D8 07 F0 07 *3 124 PrintSc *6 *6 *6 *6 *6 X Fn — — — — *4 X Win E0 5B E0 DB E0 1F E0 F0 1F x App E0 5D E0 DD E0 2F E0 F0 2F Notes: 1. * Scan codes differ ...

Table D-2 Scan codes with left Shift key Code set 1 Code set 2 Cap No. Key top Make Break Make Break 55 / E0 AA E0 35 E0 B5 E0 2A E0 F0 12 E0 4A E0 F0 4A E0 12 75 INS E0 AA E0 52 E0 D2 E0 2A E0 F0 12 E0 70 E0 F0 70 E0 12 76 DEL E0 AA E0 53 E0 D3 E0 2A E0 F0 12 E0 71 E0 F0 71 E0 12 79  E0 AA E0 4B ...

Table D-5 Scan codes in overlay mode Code set 1 Code set 2 Cap No. Keytop Make Break Make Break 09 8 (8) 48 C8 75 F0 75 10 9 (9) 49 C9 7D F0 7D 11 0 (*) 37 B7 7C F0 7C 23 U (4) 4B CB 6B F0 6B 24 I (5) 4C CC 73 F0 73 25 O (6) 4D CD 74 F0 74 26 P (–) 4A CA 7B F0 7B 37 J (1) 4F CF 69 F0 69 38 K (2) 50 ...

Appendix E Key Layout 1. United Status (US) Keyboard Figure US keyboard 2. Traditional Chinese (CH) Keyboard Figure CH keyboard NB250/NB255 Series Maintenance Manual

5. United Kingdom (UK) Keyboard Figure UK keyboard 6. US International (UI) Keyboard NB250/NB255 Series Maintenance Manual

NB250/NB255 Series Maintenance Manual 18. Greek (GK) Keyboard Figure GK keyboard 19. Hungarian (HG) Keyboard

Figure TR keyboard 22. Turkish F (TF-F) Keyboard Figure TF-F keyboard NB250/NB255 Series Maintenance Manual

27. Scandinavian (ND) Keyboard Figure ND keyboard 28. Canadian Multinational (AC) Keyboard NB250/NB255 Series Maintenance Manual

Figure JP keyboard NB250/NB255 Series Maintenance Manual

NB250/NB255 Series Maintenance Manual [CONFIDENTIAL] F-1 F. Appendix F Series Screw Torque List (PAV10) Table F-1 Series Screw Torque List SCREW P/N SCREW SPEC Q'ty LOCATION SCREW TORQUE LCD ASSY MAAA00153G0 M2x3.0 (Black ) 4 LCD HINGE BRK ASSY L&R TO LCD PANEL 17W" 1.2~1.5Kgf.cm MA000005WG0...

Appendix G Appendix G Reliability The following table shows MTBF (Mean Time Between Failures) for each component. Table G-1 MTBF Component Time (hours) LCD 10,000 Keyboard 64400 HDD 300,000 Optical (DVD/CD) drive 60,000 AC adaptor 50,000 NB250/NB255 Series Maintenance Manual [CONFIDENTIAL] G-1