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Toshiba NB255 Laptop User Manual

1. Synaptics 0 42 300 uS D O Uersion 2 1 support ALL model 01 Write 0 300 2441400 2484300 us 2526300 us 2565000 2604600 2666700 uS 2704800 2769000 us return code 42 00 0 15 15 0 15 15 0 15 15 0 15 AACISJreturn code TP Check by JaFerLan 91 3 on 2009 42 12 M 3 Tests and Diagnostics If write T P type fail the screen would display as below TEST Check by EC JaFerLan U1 3 on 2009 02 12 RETURN CODE OxFEECHO is off HHHHHHHHHHHHHHHHHHHHHHHIHIHI TP TYPE Hrite F IL HHHHHHHHHHHHHHHHHHHHHHHIHIHI Press any key to continue If read T P type fail the screen would display as below 1200 D O Uersion 2 1 support ALL model 91 Write 0 42 900 uS D 00 x TP Check by EC JaFerLan V1 3 on 2009 92 12 HOR RRM BARR
2. XXX XXX CS RC RETURN CODE is off TYPE READ FAIL Press any key to continue 3 Tests and Diagnostics If W R T P type passes the screen would display as below 0 42 900 00 p t s TP Check by JaFerLan 91 3 on 2009 D2 12 Synaptics TP uS 42 2400 D O Uersion 2 1 support ALL model 01 Version 2 1 support ALL model SET 01 Version 2 1 support ALL model SET EE SET 01 Version 2 1 support ALL model Press any keu to continue 3 Tests and Diagnostics 3 22 EEPROM Setting This EE PROM SETTING will set the computer s function status into EEPROM included supported function and no support function NOTE Should perform EE PROM SETTING once change It defined as normal rule The screen should display
3. gt a dD Figure 4 8 Removing the screws from the bottom of the laptop NB250 NB255 Maintenance Manual 4 17 4 Replacement Procedures 4 5 WLAN Card 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 i e 4 Figure 4 9 Detaching three hinge cap hooks 2 Turn the laptop upright and open the LCD cover to the maximum angle 3 Push hinge cover toward the battery bay with an outward rolling motion until the hinge cover tabs are released from the system and the hinge cover comes loose as shown in figure 4 10 4 Remove the hinge cover from the system Figure 4 10 Removing the Hinge Cover NB250 NB255 Maintenance Manual 4 18 4 5 WLAN 4 Replacement Procedures 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 cable connecting it to the motherb
4. Figure IT keyboard NB250 NB255 Series Maintenance Manual 16 French FR Keyboard S m E Entr e lt BACK SPACE 7 gt ESTEE al IE sil si IE E Jr IP rg rra cer c l CTRL 1 Systeme pm ALT GR Figure FR keyboard J EJ FILII Rea Peal Fal m B mua 2 lt gt SHIFT X 3 p Jr LI 2 _ e al rore kielel 17 German GR Keyboard CTRL SS Figure GR keyboard NB250 NB255 Series Maintenance Manual 18 0 20 SPACE 9 5 0 G H TIT Hs ENTER Ll sq Figu
5. Error Bookmark not defined Installing the Logic Upper Assembly Error Bookmark not defined Need ett Dei Error Bookmark not defined Removing the Speaker Error Bookmark not defined Installing Speaket Error Bookmark not defined Touch Pau Error Bookmark not defined Removing the touch pad Error Bookmark not defined Installing the Touch Pad Bracket Error Bookmark not defined tss lel osa tandem Tatas Error Bookmark not defined Removing the Motherboard Error Bookmark not defined Installing the Motherboatrd Error Bookmark not defined Thermal Module ous Error Bookmark not defined Removing the Thermal Fan Module Error Bookmark not defined Installing the Thermal Fan Error Bookmark not defined LCD Bezel Assembly Error Bookmark not defined Removing the LCD Bezel Assembly Error Bookmark not defined Installing the LCD Bezel Assembly Error Bookmark not defined
6. m G 719 DORADO pon Abe ve oR Ave eno e DORA 39 DDR A DW expo 9 Lu DDR AD __ we Don woes __ Ls ewe oR abe oma __ we DORADO __ mo mapas Las 39 9e Las oon aoe NB250 Series Maintenance Manual CONFIDENTIAL C 7 8 159 160 047 Table C 7 SODIMM I F pin assignments 204 PIN 4 4 vo Pinno vo ew oonan nwo oe we Lam eoo 2 Lm e v ars vs Lm press e Lus eno RAP sona Lm ew sepas Laer soeur we _ m ee _ ___ oo mona p 1 oonan ee ee Law Pee avs 7
7. NB250 NB255 Series Maintenance Manual Figure keyboard 29 Canadian Bilingual CB Keyboard z 3 ZA E oJ e Pop oj 22 4 if vi lt MI L 0 L 9 Car Figure CB keyboard gt SPACE gt gt TH J U _ 0 IF IE IEE Di 3 gt a Ia a 1 w F s amp HALLE e Selen 30 Romania RO Keyboard gt 2 LOCK 7 1 D CTRL E ALT NB250 NB255 Series Maintenance Manual keyboard Figure 31 Bulgaria BU Keyboard 222 E Ps e Fe Fe s Lei IE
8. CONFIDENTIAL 7 NB250 NB255 Series Maintenance Manual Table C 8 Internal Microphone Connector assignments 2 ewe 10 wwe ege 10 C 9 JLINE INT MIC AGND Table C 9 HEADPHONE Connector pin assignments 6 pin Somana 19 2 HP LR HP RR 4 NBA PLUG AGND NC C 10 JKB Table C 10 Keyboard Connector pin assignments 34 pin summe 10 o ow 13 15 17 19 21 23 25 27 29 CAPS LED KSI KSI5 514 KSI2 KSO15 KSO11 KSO9 KSO13 KSO6 KSO5 KSO4 KSO1 NC NB250 Series Maintenance Manual k 14 16 18 20 22 24 26 28 30 CONFIDENTIAL 3VS KSI6 KSIO KSI3 KSI7 KSO12 KSO10 KSO8 KSO7 KSO14 KSO3 KSOO KSO2 NC C 9 31 33 2 34 C 11 JUSBA Table C 11 USB Connector pin assignments 4 pin Sewan vo wwe ro USB_VCCA 2 USB20 3 USB20 4 GND 12 JUSBB Table C 12 USB B Connector pin assignments 4 pin 10 Signe USB_VCCA USB20_N1_R 3 USB20_P1_R 4 GND 13 JUSBC Table C 13 USB B Connector pin assignments 4 pin Sigrainame 19 Signainame vo 1 USB_VCCB 2 USB20_N4_R 3 USB20_P4_R 4 GND 14 JPOWER Table C 14 POWEH B
9. H e gt Figure 4 5 Removing the RAM door NB250 NB255 Maintenance Manual 4 13 4 Replacement Procedures 4 4 Memory 4 Spread out the two memory lock latches so that the memory pops up Please follow the procedure as shown in Figure 4 6 o gt Figure 4 6 Removing the RAM from the laptop 5 Pull the memory up and out at an angle using care to avoid touching the connectors Installing the Optional Memory Install the optional memory according to the following procedures after checking that the laptop is turned off CAUTION Install the optional memory after turning off the laptop If this is violated the laptop or memory can be damaged 1 Insert the memory into the connector at an angle of about 30 degrees 2 Press down on the memory module so that it is secured with both memory lock latches 3 Reinstall the optional RAM door 4 Secure the RAM door with one M2 5Dx4 screw After the laptop is turned on check the hardware configuration in the Hardware Setup or TESTUP program to make sure that the installed memory has been recognized by the system If it has not been recognized yet check the connections NB250 NB255 Mai
10. s I 5 LOCK eleli e Appendix E Key Layout lt gt SHIFT 1 2 N 5 zs 2 i E IT NB250 NB255 Series Maintenance Manual BARAR a 3 4 gt A 3 unt 3 gt TEILE A Figure CH keyboard V x r amp C m lt 3 Thai Keyboard im smua CTRL CTRL Figure TI keyboard 4 Korean KO Keyboard eere TEN Fe POTE Figure KO keyboard NB250 NB255 Series Maintenance Manual 5 United Kingdom UK Keyboard a 79 Ie AAR li 0 T1 Fig
11. 1 NB250 NB255 Series Maintenance Manual xi Chapter 1 Hardware Overview 1 Hardware Overview Chapter 1 Contents 1 1 1 2 1 3 14 Features az 1 1 2 5 1nCh HDD ue Se 1 8 Power 1 9 Batteries ae 1 11 1 4 1 Battery rm 1 11 1 4 2 Battery C bargeme Control nit anette io eodeni eae 1 11 1 4 3 1 12 NB250 NB255 Maintenance Manual 1 Hardware Overview Figures Figure 1 1A ID Parts Description Placement Part 1 4 Figure 1 2 S ATA HDD eh 1 8 Tables Table 1 1 HDD SpectHcatlolisz 1 8 Table 1 2 Quick Normal Charging Time n naa 1 11 NB250 NB255 Maintenance Manual 1 1 1 Features 1 Hardware Overview 1 1 Features The Toshiba NB200 is small size PC notebook equipped with an Intel Atom Processor providing high speed processing capabilities and advanced features The computer employs a lithium ion battery that allows it to be battery operated for long periods of time The display uses 10 1 inch WSVGA LCD panel Many features can be Built To Order BTO to customize the system fo
12. 41 3 Tests and Diagnostics 3 1 The Diagnostic Test This chapter explains how to use the Test amp Diagnostic program to test the functions of the Base on Buffalo 10A 10B 10C 10BL T amp D version 1 3 hardware modules The Test amp Diagnostic Program is stored on the T amp D diskettes The program consists of a series of tests that run automatically when the Diagnostics Program items are selected and executed NOTES To start the diagnostics follow these steps 1 Check all cables for loose connections 2 Exit this program when you are at Main Menu The TEST amp DIAGNOSTIC PROGRAM contains the following functional tests You will need the following equipment to perform some of the Diagnostic test programs CONFIG CHECK TEST Audio sound TEST FAN ON OFF TEST MAIN BATTERY CHARGE TEST FDD TEST Memory check KEYBOARD TEST MOUSE PAD TEST LCD PIXELS MODE TEST MAGNETIC SWITCH TEST LAN TEST RTC TEST 3D G sensor test 1 HDD Test RDMI Test WDMI Test Memory Test Toshiba Logo set Dynabook Logo set TP TYPE R W TEST EEPROM Setting The diagnostics USB disk A formatted working diskette for the floppy disk drive test Floppy Disk Drive Test ALAN loopback 3 Tests and Diagnostics 3 2 Executing the Diagnostic Test DOS is required to run the DIAGNOSTICS PROGRAM To start the DIAGNOSTIC PROGRAM follo
13. S ee 15 e pure U36 Figure 1 System Board Layout NB250 NB255 Series Maintenance Manual CONFIDENTIAL B 1 02 B 2 System Board Bottom View B 2 CONFIDENTIAL NB250 NB255 Series Maintenance Manual Table B 1 System Board ICs top and bottom Thermal Sensor 1402 Card Reader RTS5138 GR 10 100 LAN RTL8105E GR LAN Transformer S X FORM 5681695 BIOS ROM Codec ALC259 VB5 GR Table B 2 System Board Connectors top and bottom NB250 Series Maintenance Manual CONFIDENTIAL 3 4 Number Name JLVDS LVDS conn JFAN Fan conn JDDR1 DDRIII conn JCRT CRT conn JPOWER Power B conn JSATA SATA HDD conn JCARD Card Reader conn JMIC Microphone conn JSPKR Speaker conn JLAN LAN conn JWLAN WLAN conn JUSBA USB A conn JUSBB USB B conn JUSBC USB C conn JLINE Headphones conn JEXMIC External MIC conn JKB Keyboard conn JTOUCH TP B conn PJP1 AC Adaptor conn PJP2 CONFIDENTIAL Battery conn NB250 NB255 Series Maintenance Manual Appendix Pin Assignments System Board Table C 1 FAN pin assignments 3 B lw 2 JLVDS Table C 2 LVDS I F pin assignments 20 pin saranane Same L
14. vase 36 ALC272 GR page 22 Debug KB926 D3 Power Circuit DC DC 53 TouchPad Int KBD SPIROM GSENSOR page 29 page 28 page 28 page 27 page 23 Security Classification Compal Secret Data Compal Electronics Inc Issued Date 2009 03 20 Deciphered Date 2010 03 20 Block Diagrams Tas SHEET OF ENGINEERING DRAWING IS THE PROPRIETARY PROPERTY OF COMPAL ELECTRONICS NC AND CONTAINS CONFIDENTIAL m AND TRADE SECRET INFORMATION THS SHEET MAY NOT BE TRANSFERED FROM THE CUSTODY OF THE COMPETENT DIVISION OF RAD A DEPARTMENT EXCEPT AS AUTHORIZED BY COMPAL ELECTRONES NC NEITHER THIS SHEET NOR THE INFORMATION IT CONTAINS LA 5121P 1 MAY BE USED BY OR DISCLOSED TO ANY THIRD PARTY WITHOUT PRIOR WRITTEN CONSENT OF COMPAL ELECTRONICS ING i 209 Shoat NB250 NB255 Maintenance Manual 1 5 1 Hardware Overview 1 1 Features The system unit of the computer consists of the following components Processor The computer is equipped with the following Intel processor Intel Processor Memory The computer has one SODIMM slot which comes standard with 1GB 2GB accepting for your memory requirements It can incorporate up to 1 GB XP or 2 GB Vista Linux of main memory It supports DDR3 at 667MHz BIOS ROM EEPROM The system
15. Error Bookmark not defined 2 4 Display Troubleshooting eee Error Bookmark not defined 2 5 Keyboard Troubleshooting Error Bookmark not defined 2 5 External USB Devices Troubleshooting Error Bookmark not defined 2 6 TouchPad Troubleshooting Error Bookmark not defined 2 7 Speaker Troubleshooting Error Bookmark not defined 2 6 Wireless LAN Troubleshooting Error Bookmark not defined 2 7 Camera Troubleshooting Error Bookmark not defined 2 8 Bluetooth Troubleshooting Error Bookmark not defined 2 9 2 1 card Troubleshooting Error Bookmark not defined 2 12 HDD SSD Troubleshooting Error Bookmark not defined 2 13 Error Bookmark not defined 2 14 LAN Troubleshooting coste Error Bookmark not defined 2 17 Droublesbooting sso eut t Error Bookmark not defined NB250 NB255 Series Maintenance Manual vi Chapter 3 Tests and Diagnostics 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3
16. NB250 Series Maintenance Manual CONFIDENTIAL Table D 3 Scan codes Numlock mode Key Code set 1 Code set 2 Table D 4 Scan codes with Fn key Cap Code set 1 Code set 2 43 ENT 58 L CTRL 60 L ALT 80 Pause 81 Break 121 ARROW 122 NUMERIC 123 Scrl Note 8 Refer to Table D 7 No 126 key scan code D 6 CONFIDENTIAL 7 NB250 NB255 Series Maintenance Manual Table D 5 Scan codes in overlay mode Code set 1 Code set 2 make N oc O gt Table D 6 No 124 key scan code Key Code set 1 Code set 2 Common 37 B7 EO 12 EO 7C EO FO Ctrl Shift Alt NB250 Series Maintenance Manual CONFIDENTIAL D 7 Table D 7 126 key scan code Key top Code set 1 Code set 2 Make Make Pause E1 10 45 El 9D C5 E1 14 77 E1 FO 14 FO 77 Break Common 46 EO 7E EO FO 7E D 8 This key generates only make codes CONFIDENTIAL NB250 NB255 Series Maintenance Manual H Lj 5 0 Figure US keyboard gt 3 lt 2 Traditional Chinese CH Keyboard United Status US Keyboard all nes Pese rs
17. FRUs Check that all the latches are closed securely Check that all the required screws are used to secure FRUs Using wrong screws can damage the threads or heads of the screws or does not ensure that the FRUs are secure After installing a FRU make sure that the FRU and laptop work normally NB250 NB255 Maintenance Manual 4 5 4 Replacement Procedures 4 1 General 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 repair work and reduce the costs for repairing damaged components The equipment and tools required for disassembly and reassembly are One 2 mm Phillips screwdriver One 4 mm flat blade screwdriver Torx screwdriver with type T6 bit Tweezers for pulling out screws ESD mats for the floor and work desks An ESD wrist strap or heel grounder Anti static carpets or flooring Air ionizers for highly electrostatic sensitive areas plastic card in credit card size Screw Tightening Torque To secure screws follow the torque values listed below Over tightening can damage components and screws Under tightening can loosen the screw or cause screws to come off which may result in short circuits or other damage M2 2 mm 0 15 0 20 1 5 2 0 cm M2 5 2 5 mm 0 26 0 30 N m 2 5 3
18. iere ee er LANE DIEN VQ diutina NB250 NB255 Series Maintenance Manual vii Chapter 4 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 Replacement Procedures General Error Bookmark not defined Safety Preca tions casco ca dei au deste Error Bookmark not defined Before You usu zn Error Bookmark not defined Disassembly Procedures Poeti eoe Error Bookmark not defined Assembly PrOGOdUIe ss Error Bookmark not defined LOGS Ang Equipment dex oed e Error Bookmark not defined Screw Tightening Torque Error Bookmark not defined Colors of Screw Shall ks ss te sn bas Error Bookmark not defined Symbols of Screws on the Laptop Error Bookmark not defined Symbol examples Error Bookmark not defined Balle y ec net aa uod Error Bookmark not defined Removing the Battery Pack Error Bookmark not defined Installing the Battery Pack Error Bookmark not defined HDD asnamun eae Error Bookmark not defined Removing the HDD gies ee Error Bookmark not defined histal
19. 1 Remove two M2 5x2 5 screws from the touch pad bracket as shown in Figure 4 19 M2 5x2 5 2 Figure 4 19 Removing the screws from the touch pad bracket 2 Remove the touch pad bracket from the logic upper assembly Installing the Touch Pad Bracket Install the touch pad bracket according to the following procedures 1 Seat touch pad bracket in the correct position 2 Secure the bracket with two M2 5x2 5 screws NB250 NB255 Maintenance Manual 4 30 4 5 WLAN 4 Replacement Procedures 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 arrow in Figure 4 20 M2 5x4 2 Figure 4 20 Removing the motherboard from logic lower assembly NB250 NB255 Maintenance Manual 4 31 4 Replacement Procedures 4
20. 1 Left Right You may use the TAB key to go from one button to the next and ENTER to select After checking T Pad buttons and cursor s function use Tab key or use T Pad cursor to click the column will end this test It will indicate whether the subtests pass or fail after three questions NOTE The above figure has three compartments although the Touch Pad installed may only have two buttons In this case the central compartment in the figure does not correspond to any button 3 11 LCD Pixels Mode Test This LCD pixels mode test checks whether video display is fine This test includes two modes of the test Text Mode including 40 25 16 colors and 80 25 2 16colors 2 VGA Mode including 320 200 4 16 256 colors 640 200 2 16 colors 640 350 2 16 colors 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 When LCD cover closed the Magnetic should enable to turn off the display Follow below steps to run this test 1 Close the LCD cover 2 Open the LCD Then it will indicate whether the test is passed or failed 1 If the Magnetic switch test fail it will show below display 3 Tests Diagnostics Magnetic sw
21. nim Pn zi 2 lt gt Shift BU keyboard Figure 32 Japanese JP Keyboard Baar e e E ER DEL Y SPACE aee Nip p z 9 gt lt p 551 T Figure JP keyboard NB250 NB255 Series Maintenance Manual Series Screw Torque List 10 Table F 1 Series Screw Torque List SCREW P N SCREWSPEC LOCATION TORQUE LCD ASSY MAAA00153G0 M2x3 0 Black 4 Ye LEE 000005 60 2 5 3 Black 4 LCD HINGE L amp R TO LCD COVER 2 5 3 0Kgf cm MAOO000CKGO M2 5x5 Silver 2 LCD BEZEL TO COVER 2 5 3 0Kgf cm MB 000008 0 2 5 NI 1528 2 CONNECTOR d 5 a beaten MAO00008YGO 2 5 NI 189 2 BATTERY CONNECTOR 1 5 2 0Kgf cm 0015360 M2 0x3 black 2 WLANCARD TO MB STANDOFF 1 5 2 0Kgf cm THERMAL MODULE 000005 60 M2 5x3 black 3 THERMAL MODULE TO MB 2 0 2 5Kgf cm HDD AS
22. General 4 1 Safety Sa ha b e M ce he Re 4 2 B fore ot u mann asan su Lui ae 4 4 Disassembly PrOCeGut6s este 4 5 Assembly 0 1 tec itay acaso 4 5 Tools and Equipment E 4 6 screw Tightening 4 6 Colors OF SCE iso 4 7 Symbols of Screws the Laptop Body 4 7 ERAT CS 4 7 Battery 4 8 Removing Battery 4 8 Installing the Battery Pack o us m 4 9 a H 4 10 Removing th HDD 4 10 the HDD a k 4 12 Memory ee 4 13 Removing the Optional ee de 4 13 Installing the Optional Memory 4 14 WEAN ug 4 15 Removing the WLAN 4 15 Installing the WLAN estan erae e eene en eo 4 16 Hinge Cover and Keyboard ato qid ole enu 4 17 Removing Hinge COVED 4 18 Removing the IKeyDOStda eie e
23. TNT IN Us cr Error Bookmark not defined Removing the LCD Module Error Bookmark not defined Installing the LCD Module Error Bookmark not defined Camera module LVDS cable Error Bookmark not defined Removing the Camera module and LVDS Cable Error Bookmark not defined Installing the Camera module and LVDS Error Bookmark not defined NB250 NB255 Series Maintenance Manual 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 Error Bookmark not defined Figure 4 4 Removing the HDD Error Bookmark not defined Figure 4 5 Removing the RAM Error Bookmark not defined Figure 4 6 Removing the RAM from the laptop Error Bookmark not defined Figure 4 7 Removing the WLAN Error Bookmark not defined Figure 4 8 Removing the screws from the bottom of the laptopError Bookmark not defined Figure 4 9 Detaching three hinge cap hooks Error Bookmark not defined Figure 4 10
24. Yes Perform diagnostic check Procedure 2 No Keyboard is not faulty Continue troubleshooting refer to Figure 2 1 Was a keyboard problem detected No Yes Perform connector and replacement check Procedure 3 Replace system board Figure 2 4 Keyboard troubleshooting process NB250 NB255 Series Maintenance Manual 17 2 Troubleshooting Procedures 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 keyboard check Procedure 2 Diagnostic check Procedure 3 Connector and replacement check Procedure1 External keyboard check Connect a USB keyboard to one of the computer s USB ports and then boot the computer The computer automatically detects the external keyboard If the external keyboard works correctly the internal keyboard or its connections may be faulty Go to Procedure 2 If the external keyboard appears to have the same problem as the internal keyboard the system board may be having some problem Replace it with a new one and following the instructions in Chapter 4 Procedure2 Diagnostic check Run the test and Diagnostics Program which will automatically execute the Keyboard Test Refer to Chapter 3 Tests and Diagnostics for mor
25. Enter Shift L No 102 key CONFIDENTIAL NB250 NB255 Series Maintenance Manual Table D 1 Scan codes set 1 and set 2 3 4 wake Ctrl L Alt L Space ALT R Ctrl R Ins Del lt NB250 Series Maintenance Manual CONFIDENTIAL D 4 Table D 1 Scan codes set 1 and set 2 4 4 Code set 1 Code set 2 Break make _ 57 FO 78 PrintSc Fn Scan codes differ by mode Scan codes differ by overlay function Combination with the Fn key gives different codes The Fn key does not generate a code by itself This key corresponds to key No 42 in 102 key model Refer to Table D 6 No 124 key scan code Refer to Table D 7 No 126 key scan code X X X CONFIDENTIAL NB250 NB255 Series Maintenance Manual Table D 2 Scan codes with left Shift key Code set 1 Code set 2 EO EO 35 0 B5 EO FO 12 EO AA EO 52 EO FO 12 AA EO 53 EO FO 12 EO AA EO 4B EO FO 12 EO AA EO 47 EO FO 12 EO AA EO 4F EO FO 12 EO AA EO 48 FO 12 AA EO 50 EO FO 12 EO AA EO 49 EO FO 12 EO AA EO 51 EO FO 12 EO AA EO 4D EO FO 12 EO AA EO 5B EO FO 12 EO AA EO 5D EO FO 12 Note The table above shows scan codes with the left Shift key In combination with the right Shift key scan codes are changed as listed below With left Shift With right Shift Set 1 2 36 Set 2 EO FO 12 FO 59 12 59
26. If an error is located go to Procedure 2 If an error is not located the HDD function 15 functioning properly Procedure2 Connector and replacement check The HDD module or system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure that the HDD module is securely slotted into the system board If the problem persists go to Check 2 Check2 HDD module may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 3 Check3 system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB200 Series Maintenance Manual 34 352 Troubleshooting Procedures NB200 Series Maintenance Manual 35 362 Troubleshooting Procedures 2 13 CRT Troubleshooting Perform CR T connection check Procedure 1 oes replacemen ex CRT cable No cable unction properly YES 4 Perform CRT set check Procedure 2 CRT functioning ok No Use different CRT set YES Check CRT Replace system board gt connection C END Figure 2 13 CRT troubleshooting process To determine if the computer s CRT port is functioning properly perform the following procedures
27. 0 cm M3 3 mm 0 26 0 30 N m 2 5 3 0 cm M2 5x4 screws 0 26 0 30 N m 2 5 3 0 cm M2 5x6 screws 0 26 0 30 N m 2 5 3 0 NB250 NB255 Maintenance Manual 4 6 4 1 4 Replacement Procedures 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 special length are those of a length having decimal places eg 2 5 mm Symbols of Screws on the Laptop Body For easy maintenance the screw types are shown on the laptop body as symbols A symbol consists of a letter representing the screw type and a numeral representing the screw length Screw type Letter Bind screw B stands for bind L Flat head screw F stands for flat head Super flat head screw S stands for super flat head Tapping screw T stands for tapping L Other screws U stands for unique pan head screws studs etc Symbol examples 6 mm bind screw B6 12 mm bind screw B12 5 mm stud 05 The numeral represents rounded length of the threaded portion regardless of entire stud length NB250 NB255 Maintenance Manual 4 7 4 Replacement Procedures 4 2 Battery 4 2 Battery Removing the Battery Pack Remove the battery pack according to the following procedures and Figure 4 1 CAUTION When handl
28. 20 3 21 9 22 The Diagnostic T estos n an age RR RU pO BEN Error Bookmark not defined Executing the Diagnostic est oia Error Bookmark not defined Display Configuration e Error Bookmark not defined Audio SOUT u sua Qua dass nu Error Bookmark not defined Fan ON OFF a aa aa a 9 Battery Chat oe Test e 11 EDD TES iS ote cece eniro nei t Q ph San Quya 11 Memory 14 Keyboard eStore Ito rr I EO RAN T Error Bookmark not defined Mouse Pad Pest as tnana aaa 16 LCD Pixels Mode Test m a sha naa nsn 17 switch Vest 18 EAN TEST cc tata peut a uni usia 20 23 eer uL A 24 IStHDD Test e Pe e V EH IPEA E Dm pu 28 asun etek ema 30 31 Toshiba LOBO SEl ua iso uuu clon thr 33 Dynabook Logo o eh TP TYPE RW TEST ERES pueda DO EEPROM
29. 3 Check3 Bluetooth module may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 4 NB200 Series Maintenance Manual 30 312 Troubleshooting Procedures Check 4 system board may be damaged Replace it with a new one following the instructions in Chapter 4 2 9 2in1 card Troubleshooting START Ne Pu Perform 2 in 1 CARD test Procedure 1 2 IN 1 unit is not faulty Do errors occur during 2 IN 1 CARD test Yes t Perform 2 IN 1 card socket replacement check Procedure 2 Replace system board Figure 2 11 2 1 card troubleshooting process NB200 Series Maintenance Manual 31 322 Troubleshooting Procedures This section describes how to determine if the 2 IN 1 Card is functioning properly The process is summarized in Figure 2 16 Perform the steps below starting with Procedure 1 and continuing with the other procedures as required Procedure 1 2 in 1 card test Procedure 2 2 in 1 card socket check Procedure 1 2 in 1card test The 2 in 1 Card test card contains a 2 in 1 card test program Ensure the card in fully inserted into the socket before running the program If an error occurs during the 2in 1 card test perform Procedure 2 If no error occurs it is likely that the original 2 in 1 card was faulty 2 2in 1 Card socket check The 2 i
30. 5 WLAN Card 2 Remove the plate from the logic lower assembly 2 Figure 4 21 Removing the DC IN plate 3 Gently pull the cable out of the routing channel in the logic lower assembly from right to left as shown in Figure 4 22 I L O Figure 4 22 Removing the DC IN connector and cable NB250 NB255 Maintenance Manual 4 32 4 5 WLAN 4 Replacement Procedures 4 Use your hands to pick up the motherboard in the direction of the arrows as shown in figure 4 23 Figure 4 23 Picking up the motherboard 5 Remove the motherboard from the logic lower assembly NB250 NB255 Maintenance Manual 4 33 4 Replacement Procedures 4 5 WLAN Card 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 pressed 2 Align the connectors on the left side to their corresponding holes in the logic lower assembly as shown in Figure 4 24 Figure 4 24 Aligning the motherboard connectors 3 Seat motherboard down in the lower logic assembly NB250 NB255 M
31. 5400 RPM 5400 NB250 NB255 Maintenance Manual 1 8 1 3 Power Supply 1 Hardware Overview 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 computer Checks whether the battery pack is connected to the computer Monitors the DC power supply input voltage AC Adapter output voltage 2 Power supply s internal control Turns on and off the battery pack charging power supply Issues a charging current instruction to the PWM control IC of the battery pack charging power supply Controls the supply of DC power supply input AC Adapter output to the power supply unit Controls the supply of power to the system block load logic circuit side Controls forced shutdown if the power supply malfunctions 3 Logic circuit control Instructs the gate array to enable disable tuning the power on Controls power on off operation 4 Status display Turns on the Power LED Green Battery indicator in Green or Amber DC IN indicator in Green 5 External interface Performs communication through the I2C bus via the internal EC KBC Transfers the power supply operation mode NB250 NB255 Maintenance Manual 1 9 1 Hardware Overview 1 3 Power Supply 6 Output monitor Monitors the voltage output to the system block load logic circu
32. BIOS and Keyboard BIOS share single 1024K flash ROM The flash utility can be used to program both system and keyboard BIOS at the same time System Controllers ACPI2 0b and Windows Logo Program 3 0 compliant Support SMBus specification V2 0 Hot keys for system control Battery scope report and control m m Audio volume output control m Power switch control m Internal Keyboard country selection Graphics Controller B Intel NM10 Express Chipset for integrated graphics display B TVAP and Smart External Monitor Support NB250 NB255 Maintenance Manual 1 6 1 1 Audio Controller B Realtek Azalia ALC272 One Audio in port Mic in Line in One Audio out port Headphone out Line out Internal Microphone MIC with echo cancellation Volume control Digital control Hot keys Fn 3 Fn 4 Microsoft inbox audio driver support Wireless LAN Controller Atheros 802 11 bg HB95 1 1 B WPS supported NB250 NB255 Maintenance Manual 1 Hardware Overview 1 7 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 Table 1 1 Figure 1 2 S ATA HDD Table 1 1 HDD Specifications Capacity GB 160 GB 250G Rotational Speed RPM
33. GND 1 5VS LPC_FRAME _R LPC_AD3_R LPC_AD2_R LPC AD1 R LPC ADO R GND OFF PLT_RST 3V_WLAN GND 41 5VS CLK SMBCLK CLK SMBDATA GND USB20 N4 USB20 P4 GND LED NC NC 1 5VS GND 3V_WLAN NB250 Series Maintenance Manual CONFIDENTIAL 3 4 6 JLAN Table C 6 LAN Connector pin assignments 12 pin Ow RJ45 MIDIO 2 RJ45 MIDIO RJ45_MIDI1 4 RJ45 8 3 LAN 10 LAN SK LAN 3V LAN 12 LAN ACTIVITY CONFIDENTIAL NB250 NB255 Series Maintenance Manual JDDR1 Table C 7 SODIMM I F assignments 204 PIN 1 4 suae 10 Sanne 10 1 DIMM_VREF 2 3 GND 4 DDR_A_D4 5 DDR_A_DO 6 DDR_A_D5 7 DDR_A_D1 8 GND 9 GND 10 DDR A 005 0 11 DDR 12 DDR A DQSO 13 GND 14 GND 15 DDR A D2 16 DDR A D6 17 DDR A 03 18 DDR A D7 19 GND 20 GND 21 DDR A D8 22 DDR A D12 23 DDR A D9 24 DDR A D13 25 GND 26 GND 27 DDR DQS 1 28 DDR A DMf1 29 DDR A 0051 30 DRAMRST 31 GND 32 GND NB250 Series Maintenance Manual CONFIDENTIAL 7 6 Table 7 SODIMM pin assignments 204 2 4 vo vo m DpRAD Ls ee 9e props
34. NB255 Series Maintenance Manual 2 Troubleshooting Procedures 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 connection check Procedure 4 Diagnostic check Procedure 5 Internal connection check Procedure1 Power Status Check The following LEDS indicate the power supply status i Battery LED DC IN LED The power supply controller displays the power supply status through the Battery and the DC IN LEDS as listed in the tables below Table 2 1 Battery LED Battery LED Lights Amber Battery has been charging and AC adapter is connected Lights Green Battery is fully charged and AC adapter is connected Flashes Amber charge is low The AC adaptor must be connected to recharge the battery Doesn t light Any condition other than those above NB250 NB255 Series Maintenance Manual 10 2 Troubleshooting Procedures 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 computer and to a power supply If the DC IN LED or Battery LED is not lit go to Procedure 2 Procedure2 Adaptor battery replacement A faulty adaptor may not suppl
35. Procedure 4 Ifthe battery LED does not light go to Check 6 Make sure the battery pack is installed in the computer correctly If the battery is properly installed and the battery LED still does not light go to Procedure 4 NB250 NB255 Series Maintenance Manual 12 2 Troubleshooting Procedures Procedure4 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 Procedure 5 3 Run the Diagnostic test following the procedures described in Chapter 3 Tests and Diagnostics If no problem is detected the battery is functioning normally Procedure5 Replacement check The system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures Check the connection between the AC adaptor and the system board After checking the connection perform Check 1 Check 1 Use a multi meter to make sure that the fuses on the system board not blown If a fuse is not blown go to Check 2 If a fuse is blown go to Check 3 Check 2 sure that the battery cable is firmly connected to the system board If it is connected firmly go to Check 3 Check3 system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB250 NB255 Series Maintenance Manual 13 2 Trouble
36. Removing the Hinge Cover Error Bookmark not defined Figure 4 11 Removing the Error Bookmark not defined Figure 4 12 Removing the Power Error Bookmark not defined Figure 4 13 Removing three screws from under the keyboard Error Bookmark not defined Figure 4 14 Freeing cables and antennas from the logic upper assemblyError Bookmark not defined Figure 4 15 Removing the first pair of screws from the hinge saddleError Bookmark not defined Figure 4 16 Removing the second pair of screws from the hinge saddleError Bookmark not defined Figure 4 17 Detaching the cables from under the keyboard Error Bookmark not defined Figure 4 18 Removing the Error Bookmark not defined Figure 4 19 Removing the screws from the touch pad bracketError Bookmark not defined Figure 4 20 Removing the motherboard from logic lower assemblyError Bookmark not defined Figure 4 21 Removing DC IN plate Error Bookmark not defined Figure 4 22 Removing DC IN connector and cable Error Bookmark not defined Figure 4 23 Picking up the motherboard Error Bookmark not defined Figure 4 24 Aligning the motherboard connectors Error Bookmark not defined Figure 4 25 Installing th
37. could cause overheating smoke or fire If you replace the battery pack or RTC battery be sure to use only the same model battery or an equivalent battery recommended by Toshiba Installation of the wrong battery can cause the battery to explode NB250 NB255 Series Maintenance Manual iii manual is divided into following parts Chapter 1 Hardware Overview describes the Satellite Series system unit and each FRU Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve FRU problems Chapter 3 Test and Diagnostics describes how to perform test and diagnostic operations for maintenance service Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs Appendices appendices describe the following Handling the LCD module Board layout Pin assignments Keyboard scan character codes Key layout Screw torque list Reliability Conventions This manual uses the following formats to describe identify and highlight terms and operating procedures Acronyms On the first appearance and whenever necessary for clarification acronyms are enclosed in parentheses following their definition For example Read Only Memory ROM Keys Keys are used in the text to describe many operations The key top symbol as it appears on the keyboard is printed in boldface type Key operation NB250 NB255 Series Maintenance Manual iv Some operations require you to simultaneously u
38. eh nba cile en id 4 18 Figure 4 11 Removing the Pr IR S Se See ARI 4 19 Figure 4 12 Removing Power Board te 4 2 Figure 4 13 Removing three screws from under the 4 23 Figure 4 14 Freeing cables and antennas from the logic upper assembly 4 24 Figure 4 15 Removing the first pair of screws from the hinge saddle 4 25 Figure 4 16 Removing the second pair of screws from the hinge saddle 4 26 Figure 4 17 Detaching the cables from under the keyboard 4 27 Removing the Speaker 4 29 Figure 4 19 Removing screws from touch pad bracket 4 30 Figure 4 20 Removing the motherboard from logic lower assembly 4 31 Figure 4 21 Removing DC IN plate 4 32 Figure 4 22 Removing DC IN connector and 4 32 Figure 4 23 Picking up the motherboard 4 33 Figure 4 24 Aligning the motherboard connectors 4 34 Figure 4 25 Installing the DC IN connector obtener lect oes Uia tute 4 35 Figure 4 26 Removing the Thermal Fan Module eee 4 36 Figure 4 27 Applying the
39. log file onto diskette is necessary This action will be executed when key pressed D MAIN BATTERY TEST KAVAA KAVAE NAVAA PAV IO T amp D Function test 1 3 2010 4 11 Please select a test item _ Sl 3 Tests and Diagnostics It will skip this process if N key pressed And then it will check if it s necessary to leave this program Program will quit when key pressed and it will back main menu for next test if N key pressed Buffalo 10A 10B 10C 10BL Function T amp D DISKETTE MENU KAVAA KAVAE NAVAA PAV IO T amp D Function test 1 3 2010 4 11 3 Tests and Diagnostics 3 3 Display Configuration This Item will show the unit configuration It includes CPU CPU type DDRAM SIZE Panel ID type amp capacity Vendor ID Model Firmware VRAM size VGA CHIP TYPE Battery cell 3cell 6cell Wireless type LAN Type Bluetooth screen should display as below DD FUJITSU HJAZ160BH G2 RAMS IZE amp VGATY PE Inte 1945GSE ARE YOU TEST 1 _ 8 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 Right Speaker The screen should display as below indicating whe
40. panel 4 If water or other liquid is left on the panel s surface for a long period it can change the screen s tint or stain it Be sure to quickly wipe off any liquid CONFIDENTIAL NB250 NB255 Series Maintenance Manual 5 Glass is used in panel so be careful not to drop it or let it strike a hard object which could cause breakage or cracks N ws 6 CMOS LSI circuits are used in the module so guard against damage from electrostatic discharge Be sure to wear a wrist or ankle grounding device when handling the module NB250 Series Maintenance Manual CONFIDENTIAL A 3 7 not expose module to direct sunlight or strong ultraviolet rays for long periods 8 Do not store module at temperatures below its specifications Cold can cause liquid crystals to freeze lose their elasticity or otherwise suffer damage 9 Do not disassemble LCD module Disassembly can cause malfunctions A 4 CONFIDENTIAL NB250 NB255 Series Maintenance Manual 10 If you transport module do not use packing material that contains epoxy resin amine or silicon glue alcohol or oxime These materials can release gas that can damage the panel s polarization Naw X NB250 Series Maintenance Manual CONFIDENTIAL A 5 Appendix B Board Layout B 1 System Board Top View JTOUCH L 5121 18 2009 03 25 Made In Tainan e JKB
41. procedures are given in Chapter 4 The following tools are necessary for implementing the troubleshooting procedures Phillips screwdriver 2 mm 6mm nut driver for the helix screw nuts on the rear ports for RAM door 2DD or 2HD formatted work disk for floppy disk drive testing Torx screw driver with type T6 bit for HDD door USB memory disk Multimeter External monitor ODD USB compatible keyboard Multimedia sound system with line in and line out ports 10 Headphones 11 USB test module and USB cable 12 MIC line 2 2 Troubleshooting Flowchart gt If you know location of malfunction turn directly to appropriate section of this chapter If the problem is unspecified use the flowchart in Figure 2 1 as a guide for determining which troubleshooting procedures to execute Before performing any troubleshooting procedures verify the following Askthe user if a password is registered if it is ask him or her to enter the password Verify with the customer that Toshiba Windows XP Vista Linux is installed on the hard disk Operating systems that were not preinstalled by Toshiba can cause the computer to malfunction NB250 NB255 Series Maintenance Manual 2 Troubleshooting Procedures Make sure all optional equipment is removed from the computer NB250 NB255 Series Maintenance Manual 2 Troubleshooting Procedures START Connect the AC adapter to the DC IN s
42. the LCD panel and secure them with four M2x3 screws 2 Seatthe LCD module in the correct position in the LCD cover assembly 3 Secure the LCD module to the LCD cover assembly with four M2 5x4 screws NB250 NB255 Maintenance Manual 4 43 4 Replacement Procedures 4 15 Camera module LVDS cable 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 place it face down on a protective surface such as a foam pad 2 Disconnect the camera from the connector and remove it as shown in Figure 4 33 Figure 4 33 Removing the Camera from the LCD panel NB250 NB255 Maintenance Manual 4 44 4 15 Camera module LVDS cable 4 Replacement Procedures 3 Carefully peel up the LVDS cable starting from the top as shown in Figure 4 34 Once the LVDS cable has been peeled up disconnect it from the LCD panel taking care not to damage the connector Remove the LVDS cable 7 Figure 4 34 Removing the LVDS cable from LCD module NB250 NB255 Maintenance Manual 4 45 4 Replacement Procedures 4 15 Camera module LVDS cable 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 routed cables can become pinch
43. the computer s Diagnostics disk This program checks the display controller on the system board Insert the Diagnostics disk in the computer s floppy disk drive turn on the computer and run the test Refer to Chapter 3 Tests and Diagnostics for details If an error is detected go to Procedure 3 If an error is not detected the display is functioning properly NB250 NB255 Series Maintenance Manual 15 2 Troubleshooting Procedures Procedure3 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 disassemble the computer and then perform the following checks Check 1 Make sure the DDR module is seated properly Test display again If the problem still exits replace the DDR RAM module If the problem still exists perform Check 2 Check 2 Replace the LCD module with a new one and test display again If the problem still exists perform Check 4 Check3 Replace the LCD cable with a new one and test display again If the problem still exists perform Check 5 Check 4 system board may be damaged Replace it with a new NB250 NB255 Series Maintenance Manual 16 2 Troubleshooting Procedures 2 5 Keyboard Troubleshooting C START D Perform external keyboard check Procedure 1 Does the external eyboard function ok
44. three M2 5x3 screws securing the thermal fan module to the motherboard in order as shown in Figure 4 26 2 Remove the thermal module from the motherboard 2 5 3 3 gor Figure 4 26 Removing the Thermal Fan Module NB250 NB255 Maintenance Manual 4 36 4 5 WLAN Card 4 Replacement Procedures 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 fan module remove any release papers on the thermal pads first Figure 4 27 Applying the thermal pad on the thermal module 2 Seat the thermal fan module in the correct position on the motherboard and secure it with three M2 5x3 screws in reverse order 3 2 1 of that shown in Figure 4 26 NB250 NB255 Maintenance Manual 4 37 4 Replacement Procedures 4 13 LCD Bezel Assembly 413 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 Remove the two mask seals that cover the screws 2 Remove two M2 5x5 screws as shown in Figure 4 28 2 5 5 2 TOBSHIBA Figure 4 28 Removing screws from th
45. wo amp e G pn AD s oona m borane _ Ap oo ew s _ oo __ 7 _ T 9 DDR CKEO DDR CKE 1 DI MMA s DDR DOR AWA m p os sw oon Awa ___ 8 ooa os sw sow ___ ees porke av CONFIDENTIAL 7 NB250 NB255 Series Maintenance Manual Table C 7 SODIMM I F pin assignments 204 3 4 Pinno Signainame 10 Signal Name vo oor awa __ onamo sw sw weucoo oe Lm o sw sw Law owe 1 DOR ABS oor asso no sw ne sw 113 DDR A 114 DDR 50 DIM Ls boca won _ X AN DDR 13 120 e m Lus
46. 13 Removing three screws from under the keyboard NB250 NB255 Maintenance Manual 4 23 4 Replacement Procedures 4 5 WLAN Card 2 Remove any tape and then gently free the camera cable microphone cable and antennas from their trough as indicated in Figure 4 14 Figure 4 14 Freeing cables and antennas from the logic upper assembly 3 Remove one LVDS cable from the motherboard 4 Take the cables and antennas from the left and right sides of the display hinge and move out of the way from the hinge screws NOTE When removing the hinge screws the cables and antennas on the left and right sides will be obstacles Be sure to move any cables securely out of the way to ensure no scratching or damage occurs NB250 NB255 Maintenance Manual 4 24 4 5 WLAN 4 Replacement Procedures 5 Close the laptop Remove two M2 5x6 screws from the hinge saddle as shown in Figure 4 15 M2 5x6 2 Figure 4 15 Removing the first pair of screws from the hinge saddle NB250 NB255 Maintenance Manual 4 25 4 Replacement Procedures 4 5 WLAN Card 6 Open the laptop and remove two M2 5x6 screws from the hinge saddle as shown in Figure 4 16 M2 5x6 2 Figure 4 16 Re
47. 4 Replacement Procedures 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 pressure plate and gently pull the cable out of the connector To reconnect the cable to the pressure plate s connector raise the pressure plate up to a satisfactory height and slide the cable into the connector Secure the cable in the correct position by pressing down the sides of the pressure plate so that the plate is flush with the sides of the connector Grasp and pull the cable gently to check that the cable is connected firmly If the cable came off the connector reinsert the cable by raising the pressure plate up to a satisfactory height Normal pin connectors are used for all the other types of cables These connectors can be installed or removed by simply inserting them or pulling them out Assembly Procedures You have to reassemble the laptop after you have disassembled the laptop and fixed the component that caused the problem When reassembling the laptop keep the following general guidelines in mind Take your time to carry out the suggested instructions completely Hurried reassembly can often cause problems Check that all the cable and connectors are fastened securely Before securing the FRUs or other parts check that the cables are not caught by the screws
48. 63 SET TO SUPPORT Write f5 gt 63 Successfult ress any to continue If this unit has no MIC function press then program will set MIC disable automatically as below 851 SET CHECK PROGRAM Ver 1 0 651 SHDL1 Read f5 631 SET NO I MIC TO SUPPORT 1 5 gt 231 Successful ress anu to continue Then press any key go back to EE PROM SETTING option as below Set Set Set Set Set Set Set Set 3 Tests and Diagnostics select Check or Disable Function MIC Function Status in EE PROM Disable Enable HDMI Function Status in EE PROM Disable Enable Language Function Status in EE PROM Disable Enable 3G Function Status in EE PROM Disable Enable Wimax Function Status in EE PROM Disable Enable NON OS function flag in EE PROM NONEOS HAUEOS No Support Function Disable and check SKUID status Set Check Back To Test Title 1 2 3 4 5 6 7 8 912 _ If press 7 to disable all no support function program will perform automatically as below 851 SPEAKER EQ VALUE SET CHECK PROGRAM V1 1 651 SHDL Read ef fc SET Nonbrand speakers EQ Hrite ef gt fc Successful 851 Display PROGRAM Uer 1 0 A51 SHDL1 Read f5 gt df SET Display TO SUPPORT Write f5 gt df Successfult Front Edge Logo LED Setting program V1 0 CASI SHDL Read f5 631 Disable LOGO LED Funtio
49. AN 10 100 megabits per second 10 100BASE T It employs a Realtek 8105E for 10M 100Mbit LAN Wireless LAN BTO Some computers in this series are equipped with a Wireless LAN WLAN card This WLAN module may come with the following types depending on the model Atheros 802 11 bg HB95 1 1 NB250 NB255 Maintenance Manual 1 3 1 1 1 Hardware Overview Figure 1 1A shows the computer and its system unit configuration Figure 1 1 ID Parts Description Placement Part A 1 4 NB250 NB255 Maintenance Manual 1 1 Features 1 Hardware Overview 5 Confidential Intel Diamondville SC Thermal Sensor Clock Generator File Name LA 5121P 8 437 Pins 22 22 4 5 H_D 0 63 Intel Calistoga GSE FCBGA998 Memory BUS DDRII LED Conn 27 27 1 8V DDRII 400 533 page 6 7 8 9 10 Card Card WiMax 3G USB port USB port USB PCleMini Card PCleMini Cara WLAN GPS intel ICH7M PCle port 2 USB port 5 19 19 652 PCIe 1x 31x31mm RTLSIOSEL 10 100M TAI Uem PCle port3 24 21 Card Redder USB page 15 16 17 18 8769159 21 USB 3 page 25 HD Audio 3 3V 24 576MHz 48Mhz EI DC DC Interface CKT 3
50. Break Quit hank you very much ARE YOU TEST 1 UK keyboard 3 Tests and Diagnostics Uersion 1 80 4 pad sequential test Buffalo 86 Key UK 14 Press lt Fnt Up gt and lt FntDown gt key Ctrl Fn Break Quit hank you very much ARE YOU TEST 1 NOTE The Fn key cannot be tested in the keyboard test To determine whether the Fn key is working correctly press Fn F6 or 7 keys to check if LCD display brightness change gradually 3 10 Mouse Pad Test The Mouse test allows the user to select and assign values to the following using the Touch Pad or Tab key to move between selections 1 Mouse Speed on a scale from slow to fast 2 Acceleration Off Low Medium High 3 Button Assignments Left Right Right button either Unassigned or Drag Lock 4 Swap Buttons Left Right NOTE The Touch Pad test cannot be used to test an external USB mouse 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 Logitech Mouse Control Center Mouse Speed Acceleration Off Medium Low High Button Assignments Left Right Right Button Unassigned Unassigned Drag Lock Drag Lock Swap Buttons
51. EDVDD LCDVDD_L 3 5 LCD PWM BKOFF LVDS_SDA LVDS_SCL GND LVDS LVDS 0 GND LVDS A1 LVDS 1 GND LVDS A2 LVDS_A2 GND LVDS_ACLK LVDS_ACLK GND USB_N7_R USB_P7_R 5VS NB250 NB255 Series Maintenance Manual CONFIDENTIAL 2 4 JCRT Table C 3 CHT pin assignments 15 pin Suneimame 10 Pinto Sgnainame vo 1 CRT RL 2 CRT GL 3 CRT BL 4 NC 5 GND 6 GND 7 GND 8 GND 9 10 GND 11 NC 12 CRT DDC DAT 13 HSYNC 14 VSYNC 15 CRT CLK JSATA 11 13 15 17 19 21 Table C 4 HDD I F pin assignments 22 sane _ SATA ITX DRX NO SATA IRX DT X NO GND 3VS GND GND 5VS GND GND NC CONFIDENTIAL 10 12 14 16 18 20 22 SATA ITX DRX GND SATA IRX DT X PO 3VS 3 8 GND 5VS 5VS NC NC NC NB250 NB255 Series Maintenance Manual 5 JWLAN Table C 5 WLAN WiMax Connector pin assignments 52 pin 1 2 3 WLAN BT DATA 4 5 WLAN BT CLK 6 7 WLAN_CLKREQ 8 9 GND 10 11 WLAN 12 13 WLAN 14 15 GND 16 17 NC 18 19 NC 20 21 GND 22 23 PCIE PTX C IRX N 24 2 25 PCIE PTX C IRX P 26 2 27 GND 28 29 GND 30 31 PCIE ITX C PRX N 32 2 33 PCIE ITX C PRX P 34 2 35 GND 36 37 GND 38 39 3 WLAN 40 41 3V_WLAN 42 43 GND 44 45 NC 46 47 NC 48 49 EC_TX_P80_DATA 50 51 EC_RX_P80_CLK 52 Signal Name 3V_WLAN
52. EI EEEIEI at aL gt Figure BE keyboard NB250 NB255 Series Maintenance Manual 25 Yugoslavian YU Keyboard U FETT raamacrrca Figure YU keyboard 26 Norwegian NW Keyboard mim TE IRI TET Fr 3 E ENTER y gt samasaa amas 7 AAE E Figure NW keyboard NB250 NB255 Series Maintenance Manual 27 Scandinavian ND Keyboard ND BREAK p PGUP m SES Ct 8 Home 8 PP 72 lt SPACE 0 U K Figure ND keyboard 28 Canadian Multinational AC Keyboard e e E Tm E l 00 e t 8 6 x 5 2 8 b
53. Figure 2 7 outlines the process Start with Procedure 1 and continue as instructed NB200 Series Maintenance Manual 36 372 Troubleshooting Procedures Procedure 1 CRT connection check Procedure 2 CRT set check Procedure 1 CRT connection check The CRT cable may be damaged or the connections may be loose Perform Check 1 Check 1 Make sure CRT cable is firmly plugged into both the CRT set and the CRT port of the computer If the cable is connected correctly go to Check 2 Check 2 Make sure the CRT port is firmly secured to the system board of the computer If the malfunction remains go to Check 3 Check3 CRT cable may be damaged Replace with a good cable If malfunction remains go to Procedure 2 Procedure2 CRT set check The CRT set may be faulty Perform Check 1 Check 1 Try using set for CRT reception If it does not work the set may be damaged If the set does work perform Check 2 Check 2 Try connecting a different CRT to the computer If the replacement CRT works the original set may be damaged If the replacement set does not work the system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB200 Series Maintenance Manual 37 382 Troubleshooting Procedures 2 14 LAN Troubleshooting Perform LAN connection check Procedure 1 oes replacemen Eid LAN cable No N cable unction pro
54. NB200 Series Maintenance Manual 25 262 Troubleshooting Procedures 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 Procedure 2 Connector and replacement check Procedure 1 Diagnostic test Run the Diagnostic Program which will automatically execute the wireless LAN test Test and Diagnostic for more information on the program If an error is located go to Procedure 2 If an error is not located the wireless LAN system is functioning properly Procedure2 Connector and replacement check The wireless LAN antenna wireless LAN unit or system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure that the wireless LAN antenna is firmly connected to the Wireless LAN module refer to Chapter 4 for instructions and that the wireless LAN module is securely slotted into the system board If the problem persists go to Check 2 Check 2 Check that the wireless communication function is enable by BIOS setup and 8 and then make sure that the wireless communication LED on the front panel is light If the LED 15 light but the wireless LAN function is still faulty the antenna may be damaged Replace with a new antenna followin
55. SY M3x3 BZn 4 4 HDD BRACKET TO HDD 2 0 2 5Kgf cm LOG UP MAC925025G0 M2 5x2 5 black 2 BRACKET TO LOG UP 2 0 2 5Kgf cm LOG LOWER ASSY 000009 60 SCREW 2 SPEAKER TO LOG LOW 2 5 2 5Kgf cm LOGIC ASSY 2504060 M2 5x4 Black 2 MBTOLOGLOW 2 0 2 5Kgf cm 2504060 M2 5x4 Black 2 LOGLOWToLOGUP Rea 2 5 3 0Kgf cm MAO000062G0 2 5 6 Black 5 LOGLOWTOMBTOLOGUP 2 5 3 0Kgf cm MAO000062G0 2 5 6 Black 1 LOGUPTOMBTOLOGLOW _ 2 5 3 0Kgf cm MAO000062G0 M2 5x6 Black LOGUP TO LOG LOW 2 5 3 0Kgf cm MAO000062G0 M2 5x6 Black 2 LOG LOW TO KEYBOARD 2 0 2 5Kgf cm MAO000066G0 2 5 4 2 HDD DOOR TO LOG LOW 2 5 3 0Kgf cm 000009 60 2 5 2 2 1 8L Black 1 LOW QN s 5 5 slit om NB250 NB255 Series Maintenance Manual CONFIDENTIAL F 1 LOGIC amp LCD ASSY MAO0000062GO0 2 5 6 Black 4 HINGE BRACKET TO LOGIC 2 0 2 5Kgf cm MACK25040G0 2 5 4 Black 3 LOG LOW UP HINGE COVER 2 0 2 5Kgf cm 2 CONFIDENTIAL NB250 Series Maintenance Manual Appendix G Reliability The following table shows MTBF Mean Time Between Failures for each component Table G 1 MIBF Time hours Keyboard 64400 Optical DVD CD drive 60 000 AC adaptor 50 000 NB250 NB255 Series Maintenance Manual CONFIDENTIAL G 1
56. Toshiba Personal Computer NB250 NB255 Maintenance Manual TOSHIBA CORPORATION Copyright 2010 by Toshiba Corporation rights reserved Under the copyright laws this manual cannot be reproduced in any form without the prior written permission of Toshiba No patent liability is assumed with respect to the use of the information contained herein Toshiba Personal Computer NB250 NB255 Maintenance Manual First edition April 2010 Disclaimer The information presented in this manual has been reviewed and validated for accuracy The included set of instructions and descriptions are accurate for the Satellite Series at the time of this manual s production However succeeding computers and manuals are subject to change without notice Therefore Toshiba assumes no liability for damages incurred directly or indirectly from errors omissions or discrepancies between any succeeding product and this manual Trademarks IBM is a registered trademark and OS 2 and PS 2 are trademarks of IBM Corporation Microsoft MS DOS Windows DirectSound and DirectMusic are registered trademarks of Microsoft Corporation Intel and Pentium are registered trademarks and SpeedStep is a trademark of Intel Corporation Sound Blaster is a registered trademark of Creative Technology Ltd Centronics is a registered trademark of Centronics Data Computer Corporation Photo CD is a trademark of Eastman Kodak other properties are trademarks or registered
57. ack G6 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 amp Write test 4 Memory INFO test MEMORY R amp W Test lease check the Memory read or write Test Memory Read test Memory Write test Memory Read Write test 4 Memory INFO test 1 2 3 41 _ 3 9 Keyboard 3 Tests and Diagnostics The keyboard test checks the all keys function NOTE The Num Lock and the Overlay mode must be off to execute the keyboard test Before keyboard test starts the keyboard matrix code should be chosen as below display 1 S US for America 2 J Japan for Japan 3 K UK for Europe When you execute this test the keyboard layout is drawn on the display When any key is pressed the corresponding key on the screen changes to black as shown below It will indicate whether the sub test is passed or failed after the question US Keyboard Version 1 80 4 pad sequential test Buffalo 85 Key US matrix Press lt Fn Up gt and lt FntDown gt key Ctrl Fn Break Quit hank you very much ARE YOU TEST OK IY N1 3 Tests and Diagnostics Japan keyboard Uersion 1 80 pad sequential test Buffalo 85 Key JP matrix Press lt Fn Up gt and lt FntDown gt key Ctrl
58. aintenance Manual 4 34 4 5 WLAN 4 Replacement Procedures 4 Putthe DC IN connector in the lower DC IN trough and route the cable from left to right under the ribs as shown in Figure 4 25 Fasten with tape lt fa 2 52 16 o0 aH 9 al g SIT n Dg Figure 4 25 Installing the DC IN connector 5 Seat DC IN plate in its correct position 6 Secure two M2 5x4 screws and attach FAN cable to the motherboard as indicated by the arrow in Figure 4 20 NB250 NB255 Maintenance Manual 4 35 4 Replacement Procedures 4 5 WLAN Card 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 1 The unit become very hot during operation Be sure to let it cool down before starting the repair work Use care when removing and disassembling the unit in order to avoid damage If you remove the thermal module please use a soft cloth with alcohol to clean the thermal fan module If you use a new module please make sure to remove any release paper first 1 Remove
59. al 19 2 Troubleshooting Procedures To determine if the computer s external USB devices are functioning properly perform the following procedures Figure 2 6 outlines the process Start with Procedure 1 and continue as instructed Procedure 1 External device and connection check Procedure 2 Replace system board Procedure 1 External device and connection check The USB device may be damaged or the connection may be faulty Perform Check 1 Check 1 Make sure USB device cable is firmly plugged into one of the USB sockets If the cable is connected correctly go to Check 2 Check2 Plug the USB device into another USB socket there are three in all If the USB device still does not work go to Check 4 If the device functions correctly when connected to another USB port go to Check 3 Check3 Make sure that the USB socket is firmly secured to the system board of the computer If the malfunction remains the system board or USB small board may be damaged Go to Procedure 2 Check 4 Connect an alternative USB device to one of the computer s USB ports and then boot the computer The computer automatically detects the external device If the alternative USB device works correctly the original device may be damaged and should be replaced If the alternative USB device appears to have the same problem as the original device the system board or USB small board may be damaged Go to Procedure 2 Procedure2 Replace system board If t
60. as below select Check or Disable Function MIC Function Status in EE PROM Disable Enable Set HDMI Function Status EE PROM Disable Enable Set Language Function Status in EE PROM Disable Enable Set 3G Function Status EE PROM Disable Enable Set Wimax Function Status in EE PROM Disable Enable Set NON 05 function flag in EE PROM NONEOS HAVEOS Set No Support Function Disable Set and check SKUID status Set Check Back To Test Title 1 2 3 4 5 6 7 8 913_ If press 1 to set MIC function status EE PROM the screen should display as below select Check or Disable Function MIC Function Status in EE PROM Disable Enable Set HDMI Function Status in EE PROM Disable Enable Set Language Function Status EE PROM Disable Enable Set 3G Function Status in EE PROM Disable Enable Set Wimax Function Status in EE PROM Disable Enable Set NON 05 function flag in EE PROM NONEOS HAUEOS set No Support Function Disable Set and check SKUID status Set Check Back To Test Title 1 2 3 4 5 6 7 6 9171 1 Please check SPEC of this unit whether has MIC N NOMIC Y N Please check related information to judge this unit whether has MIC function 3 Tests and Diagnostics If this unit has MIC function press then program will set MIC enable automatically as below 51 I MIC SET CHECK PROGRAM 1 0 651 SHDL1 Read f5
61. connector pin assignments 4 pin 10 PWR PWR ON LED 3 ON OFFBTN _R 4 GND C 10 CONFIDENTIAL NB250 NB255 Series Maintenance Manual 15 JCARD Table 15 CARD connector pin assignments 11 19 SigraiName 1 SD DATA3 2 SDCMD 3 GND 4 VCC 5 SDCLK 6 GND 7 SD MS DATAO 8 SD 9 SD DATA2 10 SDWP 11 SDCD 16 JEXMIC Table C 16 EXMIC connector pin assignments 6 pin Lew io AGND MIC1_L L MIC1_L R 4 MIC_SENSE AGND 6 NC C 17 JSPKR Table C 17 SPKH connector pin assignments 2 pin Summae VO Sgnainame 10 1 SPK R1 2 SPK R2 NB250 Series Maintenance Manual CONFIDENTIAL C 11 18 Table 18 T P connector pin assignments 6 pin Pinno 1 GND 2 TP SWR TP SWL 4 TP DATA TP CLK 6 5VS C 12 CONFIDENTIAL NB250 NB255 Series Maintenance Manual Appendix D Keyboard Scan Character Codes Table D 1 Scan codes set 1 and set 2 1 4 Kou 1 Code set 2 eytop 030223002388 250 255 Series Maintenance Manual CONFIDENTIAL D 1 D 2 Table D 1 Scan codes set 1 and set 2 2 4 se mae Caps Lock A
62. d when using an external USB device perform the External USB Devices Troubleshooting procedures in Section 2 6 2 Ifan error is detected when using the speakers perform the Speaker Troubleshooting procedures in Section 2 8 3 error is detected when using the Wireless LAN perform the Wireless LAN Troubleshooting procedures in Section 2 10 4 Ifanerror is detected when using the Bluetooth perform the Bluetooth Troubleshooting procedures in Section 2 12 5 error is detected when using the MIC perform the MIC troubleshooting procedures in Section 2 16 NB250 NB255 Series Maintenance Manual 2 Troubleshooting Procedures 2 3 Power Supply Troubleshooting Check Power Supply Status Procedure 1 Are the DC IN and Battery LEDs lit Replace adaptor battery Procedure 2 Yes 2 Check power supply connections Procedure 3 Run diagnostic program Procedure 4 Can you turn the Yes computer on No Perform internal connection No gt check Procedure 5 Are the internal power connections secure Yes Replace system board NUN 4 gt END Figure 2 2 Power Supply Troubleshooting Process The power supply controls many functions and components To determine if the power supply is functioning properly start with Procedure 1 and continue with the other Procedures NB250
63. dure 1 Diagnostic test Run the Diagnostic Program which will automatically execute the 3G test Test and Diagnostic for more information on the program If an error is located go to Procedure 2 If an error is not located 3G system is functioning properly Procedure2 Connector and replacement check The 3G antenna 3G unit or system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure that the 3G antenna is firmly connected to the 3G module refer to Chapter 4 for instructions and that the 3G module is securely slotted into the system board If the problem persists go to Check 2 Check 2 Check the wireless communication function is enabled by BIOS setup and 8 and then make sure that the wireless communication LED on the front panel is light If the LED is light but the 3G function is still faulty the antenna may be damaged Replace with a new antenna following the steps in Chapter 4 Replacement Procedures If the problem persists or if the wireless LAN LED is not light when the wireless communication function is enabled by BIOS setup and 8 go to Check 3 Check3 unit may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 4 Check 4 system board may be damaged Replace it with a new one following the instruct
64. e DC IN connector Error Bookmark not defined Figure 4 26 Removing the Thermal Fan Module Error Bookmark not defined Figure 4 27 Applying the thermal pad on the thermal module Error Bookmark not defined Figure 4 28 Removing screws from the LCD Bezel AssemblyError Bookmark not defined Figure 4 29 Removing the bezel from the hinge wall Error Bookmark not defined Figure 4 30 Removing the bezel from the display assembly Error Bookmark not defined NB250 NB255 Series Maintenance Manual X Figure 4 31 Removing screws from 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 not defined Figure 4 34 Removing the LVDS cable from the LCD moduleError Bookmark not defined Appendices Appendix A Handling the LCD Modules secessus mi e diet toad 1 Appendix B Board ESyoUt a cues estar 1 Appendix S H a SQ N A a aS 1 Appendix D Keyboard Scan Character Codes D 1 Appendix E 1 Appendix P Series Screw a an a 1 Appendix G
65. e LCD Bezel Assembly NB250 NB255 Maintenance Manual 4 38 4 13 LCD Bezel Assembly 4 Replacement Procedures 3 Remove the bezel from each side of the hinge wall in the order shown in Figure 4 29 NOTE The sides of the bezel are secured tightly Remove slowly and take extra caution to prevent your nails from becoming broken or from scratching the LCD surface Figure 4 29 Removing the bezel from the hinge wall 4 Push bezel from the left and right side as shown in Figure 4 30 and remove the bezel from the display assembly TOSHIBA Figure 4 30 Removing the bezel from the display assembly NB250 NB255 Maintenance Manual 4 39 4 Replacement Procedures 4 13 LCD Bezel Assembly 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 pinched or damaged and cause malfunction 1 Seatthe LCD bezel assembly in the correct position 2 Press the bezel hinge wall against the cover hinge wall Press the left and right side of the bezel as shown in Figure 4 31 Make sure the bezel clicks into place 3 Secure it to the display assembly with two M2 5x5 screws 4 Adhere the two mask seals to the screws NB250 NB255 Maintenance Manual 4 40 4 14 LCD Module 4 Replacement Procedures 414 LCD Module Removing the LCD Mod
66. e information on how to run the program If an error is located go to Procedure 3 If an error does not occur the keyboard is functioning ok Procedure3 Connector and replacement check The keyboard and or system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure the keyboard cable is firmly connected to the system board If the connection is loose reconnect firmly and repeat Procedure 2 If there is still an error go to Check 2 Check2 keyboard may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 3 Check3 system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB250 NB255 Series Maintenance Manual 18 2 Troubleshooting Procedures 2 5 External USB Devices Troubleshooting 5 Perform external device and connection check Procedure 1 Check USB port Yes connection oes the device function when connected toa different USB port Does an alternative USB device function correctly Original USB Yes device is faulty No Replace system board Procedure 2 END gt Figure 2 5 External USB device troubleshooting process NB250 NB255 Series Maintenance Manu
67. e test Connect a set if earphones or external speakers If these function correctly go to Procedure 3 If they do not function correctly the system board may be defective or damaged Replace it with a new one Procedure3 Connection check Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and make sure the speaker cable is firmly connected to the audio board If the speakers are still not functioning properly go to Procedure 4 Procedure 4 Replacement check If the monaural speakers don t sound properly the monaural speakers may be defective or damaged Replace them with new ones If the monaural speakers still do not work properly try replacing in turn the audio board and system board NB200 Series Maintenance Manual 24 252 Troubleshooting Procedures 2 6 Wireless LAN Troubleshooting START Perform diagnostic test Procedure 1 Wireless LAN system Was a wireless LAN problem delected No gt troubleshooting refer c to Figure 2 1 Yes Perform connector and replacement check Procedure 2 Replace wireless LAN antenna unit Replace system board Figure 2 8 Wireless LAN troubleshooting process The wireless LAN antenna wire wireless LAN unit or system board may each be the source of a wireless LAN fault Any of these components may be damaged To determine if the
68. each test to perform automatically Is an error detected by any of the diagnostics tests After confirming which diagnostics test has detected an error perform the appropriate procedure as outlined below No Y System is normal Figure 2 1 Troubleshooting flowchart 2 2 NB250 NB255 Series Maintenance Manual 2 Troubleshooting Procedures If the diagnostics program cannot detect an error the problem may be intermittent The test program should be executed several times to isolate the problem When a problem has been located perform the appropriate troubleshooting procedures as follows l If an error is detected by the battery test perform the Power Supply Troubleshooting procedures in Section 2 3 error is detected by the display test perform the Display Troubleshooting procedures in Section 2 4 If an error is detected by the keyboard test perform the Keyboard Troubleshooting procedures in Section 2 5 If an error is detected by the TouchPad test perform the TouchPad Troubleshooting procedures in Section 2 7 If an error is detected by the audio test perform the Speaker Troubleshooting procedures in Section 2 8 and the Optical Drive Troubleshooting Procedures in Section 2 9 NB250 NB255 Series Maintenance Manual 2 Troubleshooting Procedures Other problems that are not covered by the diagnostics program may be discovered by a user 1 Ifanerror is detecte
69. eck Procedure 1 Diagnostic test Run the functioning Program in windows which will display the Camera test result If tests and diagnostics result abnormal go to Procedure 2 If an error is not located the Camera system is functioning properly Procedure2 Connector and replacement check The Camera board or system board may be disconnected or damaged Disassemble the computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure that the Camera board cable is securely slotted into the system board If the problem persists go to Check 2 Check 2 Camera board may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 3 Check3 system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB200 Series Maintenance Manual 28 292 Troubleshooting Procedures 2 8 Bluetooth Troubleshooting START Preform diagnostic test Procedure 1 YES Bluetooth is not faulty NO Continue troubleshooting refer to Figure 2 1 Was a Bluetooth problem detect YES Y Perform connector and replacement check Procedure 2 5 v Replace Bluetooth antenna moudle YES Replace system board Figure 2 10 Bluetooth troubleshooting process NB200 Series Maintenance Manual 29 302 T
70. ed or damaged and cause malfunction Connect the LVDS cable to the connector on the back of the LCD module 2 Adhere the LVDS cable in the correct position on the LCD module 3 Connect the camera to the camera connector on the LVDS cable NB250 NB255 Maintenance Manual 4 46 Appendix 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 that you seat it so that it is properly aligned and maximum visibility of the display is maintained OK 4 Eso 2 careful to align holes at four corners of LCD module with corresponding holes in the LCD cover before securing the module with screws Do not force the module into place because stress can affect its performance Note The panel s polarized surface is easily scratched and damaged so handle it carefully NB250 NB255 Series Maintenance Manual CONFIDENTIAL A 1 2 3 panel s surface gets dirty or moist wipe it with cotton or a soft cloth If it is still dirty try breathing on the surface to create a light condensate and wipe it again If the surface is very dirty we recommend a CRT cleaning agent Apply the agent to a soft cloth and then wipe the surface Do not apply cleanser directly to the
71. ed to be removed before removing the suspect FRU After you determine those FRUs go to the appropriate sections according to the section numbers shown in the boxes Then start removal and replacement 4 2 Battery 4 3 HDD 4 4 Memory 4 15 LCD Bezel Assembly 4 6 Hinge Cover 4 5 WLAN Card and Keyboard 4 7 Power Board 4 16 LCD Module 4 17 4 8 Logic Upper module and LVDS Assembly cable 4 9 Speaker 4 12 Motherboard 4 10 Touch Pad 4 13 Thermal 4 14 WiMax 4 11 Bluetooth Fan Module Module Optional Card How to use the chart two 4 2 Battery 4 3 HDD 4 4 Memory 4 16 LCD Bezel examples Assembly r emoving the 4 5 WLAN Card 4 7 4 18 First remove parts from 4 6 4 8 Logic Upper 1 ssemb Hinge Cover amp Keyboard 4 7 Assembly Power Board and 4 8 Logic 4 9 Speak 4 12 Motherboard sh Pz Upper Assembly and D 410 Touch Pad 4 13 Thermal 4 14 3G Module 4 15 WiMax 4 11 Bluetooth e For removing the LCD V Fan Module Optional Module Optional Card Module First remove Logic Upper Assembly then remove the LCD Bezel Assembly Microphone NB250 NB255 Maintenance Manual 4 1 4 Replacement Procedures 4 1 General Safety Precautions Before you begin disassembly read the following safety precautions caref
72. eed1B true Pass Error B Debug true Txtimeout 58 AutoRun true x Pass in debugging mode Press ESC key to exit If an error is detected and a test fails the following message displays JE IL ress any key to continue 3 Tests and Diagnostics 3 14 RTC Test Checks the computer s RTC Real Time Clock and calendar functions by comparing the DOS and CMOS values The test runs automatically The screen should display as below indicating whether the test is passed or failed when finished lease Check the result after test ress any key to continue ait for zero counter 22 33 48 4 81228 4 CMOS TIME 22 33 48 8122888 99 19 2882 CMOS DATE 09 19 2002 DATE amp TIME test PASS ress any key to continue 3 Tests and Diagnostics 3 15 3D G sensor test NOTE please keep 90 degree between logic upper and LCD panel when test The display of a test program and the set method of PC are shown below Display of a Test Program The portion which PC and Test Fixture contact is green Upper Set method of PC A If the picture shows as below it means the 3D G sensor function is OK Test 2 Rear Upper Set method of PC B Test 3 Right Upper Set Method of PC 3 Test 4 3 Tests and Diagnostics Front Upper Set method of PC 4 Left Upper Set method of PC 5 Test Result A test res
73. er board in the direction indicated in figure 4 12 and slide the power board out 4 Remove the power board from the logic upper assembly Figure 4 12 Removing the Power Board Note Be careful not to damage the Power Board when connecting it with the cable Make sure the card is seated in the correct position NB250 NB255 Maintenance Manual 4 21 4 Replacement Procedures 4 5 WLAN Card 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 latch clicks into place 3 Place the power board cable into the connector on the motherboard 4 Use tweezers and a finger to push down on the left and right latches of the connector Both latches must be pushed simultaneously to secure the power board cable 5 Secure the power board cable with adhesive tape NB250 NB255 Maintenance Manual 4 22 4 5 WLAN 4 Replacement Procedures 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 Remove four 2 5x6 screws from the logic upper assembly M2 5x6 4 Figure 4
74. eu tot vedi tds 4 19 Installing the Hinge Cover and 4 20 Power BO at EE 4 21 Removing Power Board ses 4 21 NB250 NB255 Maintenance Manual 4 ii 4 Replacement Procedures Installing the Power Board sai eoe eed deed dd 4 22 4 8 Loic Upper Assembly aq 4 23 Removing Logic Upper Assembly 4 23 Installing the Logic Upper Assembly 4 27 4 9 Speaker 4 29 Removing tlie Speaker 4 20 Installing the Speaker uos inea niv Qan ci un DAR 4 29 4 10 POUCH 4 30 Removing touch pad bracket ein ted 4 30 Installing the Touch Pad Bracket iater ges 4 30 4 11 Motherboard e252 PR 4 31 Removing Motherboard 4 31 Installing the Motherboard eerte terr torte ter eter 4 34 4 12 Thermal Fan Module 4 36 Removing Thermal Fan 4 36 Installing the Thermal Fan 4 37 4 13 ECD Bezel Assembly a saa 4 38 Removing the LCD B
75. ezel 4 38 Installing LCD Bezel 4 40 4 14 ECD Module 4 eon tse nud c 4 41 Removing LCD Module aieo taco 4 41 Installing the Module dioe D 4 43 4 15 Camera module LVDS 4 44 Removing Camera module and LVDS Cable 4 44 Installing the Camera module and LVDS 4 46 NB250 NB255 Maintenance Manual 4 iii 4 Replacement Procedures Figures Figure Removing the Battery uo ede paene fecu 4 8 Figure 4 2 Removing HDD door eee a eu 4 10 Figure 4 3 Removing the HDD from the HDD eee 4 11 Figure 4 4 Removing HDD plate e 4 12 Figure 4 5 Removing the RAM door etie a edie eo nde need 4 13 Figure 4 6 Removing the RAM from the 1 4 14 Figure 4 7 Removing WLAN 4 15 Figure 4 8 Removing the screws from the bottom of the laptop 4 17 Figure 4 9 Detaching three hinge cap hooks 4 18 Figure 4 10 Removing the Hinge COVBF o outre eo
76. g the steps in Chapter 4 Replacement Procedures If the problem persists or if the wireless LAN LED is not light when the wireless communication function is enabled by BIOS setup and 8 go to Check 3 Check3 wireless LAN unit may be damaged Replace it with a new one following the instructions in Chapter 4 If the problem still exists perform Check 4 Check 4 system board may be damaged Replace it with a new one following the instructions in Chapter 4 NB200 Series Maintenance Manual 26 272 Troubleshooting Procedures 2 Camera Troubleshooting START v Preform diagnostic test Procedure 1 Camere 1s not faulty Continue troubleshooting refer to Figure 2 1 Was a Camera problem detect Yes Perform connector and replacement check Procedure 2 YES v Replace Camera B YES Y Replace system board Figure 2 9 Camera troubleshooting process NB200 Series Maintenance Manual 27 282 Troubleshooting Procedures The Camera board or system board may be the reason of a Camera fault Either of these two components may be damaged To determine if the computer s Camera is functioning properly perform the following procedures Figure 2 14 outlines the process Start with Procedure 1 and continue with the other procedures as instructed Procedure 1 Diagnostic test Procedure 2 Connector and replacement ch
77. harge capacities is 100 The screen should display as below if the charge function is OK will show Series Battery Test 591 91 8 2002 07 23 attery Type Lion anufacturer Sony emain charge capacity 88 8 harge Test gt to continue If the charge function is NG the screen will display as 3 Tests and Diagnostics 3 7 Main Battery Change Test series Battery Test 5911 91 8 2002 07 23 attery Lion anufacturer Sony emain charge capacity 86 5 harge Test gt ress any key to continue 3 7 FDD Test NOTE Before running the FDD test prepare a formatted work diskette 1 44 MB Need to insert FDD when power on machine Otherwise the Floppy can be not detected The Floppy Disk Test includes three subtests of the 1 Sequential seek verify function Range Track 0 79 2 Funnel code seek verify function Range Track 0 79 3 Write Read Compare pattern function Range Track 75 79 NOTE The write protected device of this formatted diskette should be Disable The subtests ru