Lenovo B590 Hardware Maintenance Manual

Lenovo B590 Manual

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  • Lenovo B590 | Hardware Maintenance Manual - Page 1
    Hardware Maintenance Manual Lenovo B590
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    " on page 95. First Edition (October 2012) © Copyright Lenovo 2012. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration "GSA" contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
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    the battery pack 31 Chapter 4. Related service information 33 Recovering the computer settings 33 Passwords 33 Power-on password 34 Supervisor password 34 Power management 34 Screen blank mode 34 Sleep mode 34 Hibernation mode 35 Chapter 5. Lenovo B590 37 Specifications 37 Status
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    ii Hardware Maintenance Manual
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    Machine Lenovo B590 Machine type (MT) 3761, 6247, 20206, 20208 Use this manual to troubleshoot problems. The manual is divided into the following sections: • The common sections provide general information, guidelines, and safety information required for servicing computers. • The product-specific
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    iv Hardware Maintenance Manual
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    safety information that you need to be familiar with before you service a Lenovo Notebook. • "General safety" on page 1 • "Electrical safety" on page 2 • "Safety inspection guide" on page 3 • "Handling devices that are sensitive to electrostatic discharge" on page 3 • "Grounding requirements" on
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    , you can then operate the switch or unplug the power cord quickly. • Do not work alone under hazardous conditions or near equipment that has hazardous voltages. • Disconnect all power before: - Performing a mechanical inspection - Working near power supplies - Removing or installing main units
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    external ground pin and the frame ground. b. The power cord should be the type specified in the parts list. c. Insulation must not be frayed or worn. 4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of
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    -outside shells on these systems. - Use the round ground prong of the ac plug on ac-operated computers. Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified
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    DANGER DANGER DANGER DANGER DANGER Chapter 1. Safety information 5
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    DANGER 6 Hardware Maintenance Manual
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    Chapter 1. Safety information 7
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    PERIGO PERIGO PERIGO PERIGO PERIGO PERIGO 8 Hardware Maintenance Manual
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    PERIGO PERIGO DANGER DANGER DANGER Chapter 1. Safety information 9
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    DANGER DANGER DANGER DANGER DANGER VORSICHT 10 Hardware Maintenance Manual
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    VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1. Safety information 11
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    VORSICHT VORSICHT VORSICHT 12 Hardware Maintenance Manual
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    Chapter 1. Safety information 13
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    14 Hardware Maintenance Manual
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    Chapter 1. Safety information 15
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    16 Hardware Maintenance Manual
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    Chapter 1. Safety information 17
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    18 Hardware Maintenance Manual
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    Laser compliance statement (multilingual translations) The laser compliance statements in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese Chapter 1. Safety information 19
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    20 Hardware Maintenance Manual
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    Chapter 1. Safety information 21
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    22 Hardware Maintenance Manual
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    Chapter 1. Safety information 23
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    24 Hardware Maintenance Manual
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    Chapter 1. Safety information 25
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    26 Hardware Maintenance Manual
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    Support Web site. • Do not try to update the BIOS settings for any computer unless you have been trained and certified. An untrained person runs the risk of damaging the computer. • Before installing the latest utility, make sure that the battery is fully charged and an ac power adapter is connected
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    error. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the FRU that changed the symptoms. Strategy for replacing a hard disk Manual or direct substitutions can be used. • Compliant FRUs identified in Hardware Maintenance Manual
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    computer that you are servicing sequence might have been altered. If you select an incorrect drive, data or programs might be overwritten. • Replace a FRU only with another FRU of the correct model. When you replace a FRU, make sure that the model Before checking problems with the computer, determine
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    Connect the ac power adapter. 4. Check that power is supplied when you turn on the computer. 5. Turn off the computer. 6. Disconnect the ac power adapter and install the charged battery pack. 7. Check that the battery pack supplies power when you turn on the computer. If you suspect a power problem
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    , do the following: • Windows 7: Launch the Power Manager program and click the Battery tab. • Windows 8: - Press the recovery button to launch the Lenovo Solution Center program, and then click Battery. - Press Fn+Esc to launch the Lenovo Experience program, and then click Battery Health. Note: If
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    32 Hardware Maintenance Manual
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    - Restoring the Windows operating system from a system image - Starting up from an external device For more information about the recovery solutions, refer to the help information system of the programs. Passwords As many as two passwords might be needed for a Lenovo notebook computer: the power
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    to what occurs in screen blank mode: • The LCD is powered off. • The hard disk drive is powered off. • The CPU stops. To enter sleep mode, press Fn+F1. In certain circumstances, the computer goes into sleep mode automatically: • If a "suspend time" has been set on the timer, and the user does not do
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    the lid. • Pressing the power button. Also, the computer goes into hibernation mode automatically in either of the following conditions: • If a "hibernation time" has been set on the timer, and if the user does not do any operation with the keyboard, the hard disk drive, the parallel connector, or
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    36 Hardware Maintenance Manual
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    solid-state drive as a bootable device. The mSATA solid-state drive is used for "cache" function only. Display • Size: 15.6 inches (396 mm) • Resolution: - LCD: 1366-by-768 - External monitor: Maximum 2048-by-1536 • Camera Keyboard • 6-row Lenovo keyboard • Recovery button Interface • Combo audio
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    models) Wireless features • Integrated wireless LAN • Integrated WiMAX • 100/1000 Mbps Ethernet communication Status indicators This chapter presents the system status indicators that show the status of the computer Lock key. 2 Numeric Lock status White: The separate numeric keypad on the keyboard
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    or less. • Off: The battery is detached or the computer is powered off. Fn key combinations The following table describes the functions of Fn key combinations. Table 2. Function key combinations Key combination Fn+Esc Description Launches the camera and audio settings window. Fn+F1 Fn+F2 Fn+F3
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    Table 2. Function key combinations (continued) Key combination Description Fn + up/down arrow Increases or decreases the display brightness level. Fn + left/right arrow Increases or decreases the sound volume. 40 Hardware Maintenance Manual
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    Limited Warranty documentation for full details. Screw notices Loose screws can cause a reliability problem. In the Lenovo notebook computer, this problem is addressed with special nylon-coated screws that have the following characteristics: • They maintain tight connections. • They do not easily
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    is recommended to use new screws for replacements. If you have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table for each step. • Ensure torque screw drivers are calibrated correctly following country specifications. 42 Hardware Maintenance Manual
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    procedures. DANGER Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables. Attention: After replacing a FRU, do not turn on the computer until you have made sure that all screws, springs
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    pack Removal steps of battery pack DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. Unlock the spring-loaded battery latch 1 . Holding the manual battery latch in the unlocked position, remove the battery pack in the direction
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    the cover 2 . 1 1 2 2 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (2) 1030 Optical drive For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 Removal steps of optical drive Remove the screw 1 . 1 Color Black Torque 1.85
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    drive bracket Remove the screws 1 and then remove the optical drive bracket. Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (2) 1040 Memory modules For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 46 Hardware Maintenance
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    the same time in the direction shown by the arrows 1 , and then unplug the memory module in the direction shown by the arrow 2 . 1 1 2 Note: If only one memory module is used on the computer you are servicing, the card must be installed in SLOT-0 ( a : lower slot), but not in SLOT-1 ( b : upper
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    disk drive assembly Remove the screw 1 , then pull the tab in the direction shown by the arrow 2 . 1 2 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) Remove the hard disk drive from the slot 3 . 3 Color Black Torque 1.85 kgf-cm When installing: Ensure that the hard disk
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    (4) Remove the hard disk drive bracket as shown by the arrow 2 . 2 1 Color Silver Torque 4 kgf-cm 1060 PCI Express Mini Card for wireless LAN For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 Chapter 7. Removing and replacing a FRU 49
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    Removal steps of PCI Express Mini Card for wireless LAN In steps 1 , disconnect the cables from the card using the removal tool antenna RF connector (P/N: 08K7159) or pick up (MAIN) into the jack labeled M, and the white cable (AUX) into the jack labeled A on the card. 50 Hardware Maintenance Manual
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    state drive For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on • Before removing the drive, have the user make a backup copy of all the information on it if possible. • Never remove the drive while the computer is operating or is in suspend mode.
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    battery For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 Removal steps of backup battery DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. 52 Hardware Maintenance Manual
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    the backup battery hole and push the backup battery until the battery pops up. When installing: Ensure that the connector is attached firmly. 1090 Keyboard For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 Chapter 7. Removing and replacing
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    Remove the screws 1 . 1 1 1 When installing: Ensure that the screws have been fastened to secure the keyboard. Step 1 Screw (quantity) M2.5 × 8 mm, flat-head, nylon-coated (3) Color Black Torque 4.0 kgf-cm Push hard in the direction shown by the arrow 2 to unlatch
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    Remove the keyboard in the direction shown by the arrow 3 . 3 Carefully lift the keyboard until you can see how it's connected. Hold the keyboard above the computer 4 , and then detach the keyboard connector. Chapter 7. Removing and replacing a FRU 55
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    6 5 When installing: Ensure that the keyboard connector is attached firmly. 1100 Keyboard bezel For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1090 Keyboard" on page 53 56 Hardware Maintenance Manual
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    .5 × 8 mm, flat-head, nylon-coated (10) M2 × 3 mm, flat-head, nylon-coated (3) Remove the screws 3 . Color Black Black Torque 4.0 kgfcm 1.85 kgf-cm 3 3 3 Step 3 Screw (quantity) M2 × 5 mm, flat-head, nylon-coated (3) Color Black Torque 1.85 kgf-cm Chapter 7. Removing and replacing a FRU 57
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    Detach the connectors. 5 4 8 9 6 7 When installing: Ensure that all the connectors are attached firmly. Remove the keyboard bezel. 10 10 10 11 10 10 10 1110 LED board For access, remove these FRUs in order: 58 Hardware Maintenance Manual 10 10 10
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    2 . 1 2 1120 Power board and touch pad bracket For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56 Chapter 7. Removing and replacing a FRU 59
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    board Remove the screw 1 and then remove the power board 2 . 2 1 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56
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    firmly to the system board. 1140 I/O board For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56 Chapter 7. Removing and replacing a FRU 61
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    put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface. 62 Hardware Maintenance Manual
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    on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56 • "1130
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    (quantity) M2 × 5 mm, flat-head, nylon-coated (1) Color Black When installing: Ensure that the cable is attached firmly to the system board. 64 Hardware Maintenance Manual Torque 1.85 kgf-cm
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    Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 • "1090 Keyboard" on page 53 • "1100 Keyboard Chapter 7. Removing and replacing a FRU 65
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    on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56 • "1130
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    Loosen the screws 2 to 8 . Note: Different models might have different numbers of screws. 7 6 5 2 3 8 4 Lift the fan assembly in the direction shown by the arrow 9 . Note: Be careful not to damage the connector. 9 Chapter 7. Removing and replacing a FRU 67
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    cover" on page 44 • "1030 Optical drive" on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 68 Hardware Maintenance Manual
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    on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 • "1090 Keyboard" on page 53 Chapter 7. Removing and replacing a FRU 69
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    Keyboard bezel" on page 56 • "1130 Microphone assembly" on page 60 • "1140 I/O board" on page 61 • "1150 System board assembly and USB board" on page 62 • "1160 DC-in connector" on page 65 Removal steps of LCD unit Release the antenna cables from the cable guides along the cable guides. As you guides
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    on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 51 • "1080 Backup battery" on page 52 • "1090 Keyboard" on page 53 • "1100 Keyboard bezel" on page 56 • "1130
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    several kinds. Apply those labels listed when you replace the base cover. For the labels which to the new one. Note: If you replace a part with the Windows Certificate of Authentication (COA) label 11 , computer and the information on the label, such as the part number, serial number, and product key
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    remove these FRUs in order: • "1010 Battery pack" on page 44 • "1190 LCD unit" on page 69 3 4 5 6 7 8 9 7 Brazil wireless LAN label or wireless LAN label for United States/Canada/Taiwan 8 PPT label 9 Malaysia SIRIM label 10 Vodafone label 12 Rating label Chapter 7. Removing and replacing a FRU 73
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    1.85 kgf-cm When installing: Make sure that all the latches are attached firmly. Then secure the bezel with the screws. 2020 Camera For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1190 LCD unit" on page 69 • "2010 LCD front bezel" on page 73 74 Hardware Maintenance
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    the following illustration. Note: The camera is stuck on the top center of the LCD cover. 1 2 When installing: Stick the camera to the top center of the order: • "1010 Battery pack" on page 44 • "1190 LCD unit" on page 69 • "2010 LCD front bezel" on page 73 Chapter 7. Removing and replacing a FRU 75
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    the LCD panel 3 . Remove the LCD cable. Color Black Torque 1.85 kgf-cm 5 4 3 When installing: Ensure that the cable is attached firmly. 76 Hardware Maintenance Manual
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    For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1190 LCD unit" on page 69 • "2010 LCD front bezel" on page 73 • "2020 Camera" on page 74 • "2030 LCD panel, LCD cable, and hinges" on page 75 1 Color Black Torque 1.85 kgf-cm Chapter 7. Removing and replacing a FRU 77
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    the LCD rear cover assembly and from the hinges in the direction shown by the arrows 1 . 1 1 Cable routing: Route the antenna cables along the cable guides and secure the antenna boards with adhesive tapes. As you route the cables, make sure that they are not subjected to any tension. Tension could
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    presents the locations of the Lenovo B590 hardware components. Right-side view 2 1 2 4 15 14 3 4 13 12 11 5 6 7 10 8 9 Figure 1. Lenovo B590 right-side view 1 Camera (on some models) 2 Wireless module antennas 3 Status indicators1 4 Speakers 5 ac power connector 6 USB connector 7 Optical
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    1 2 3 4 10 5 6 7 8 9 Figure 2. Lenovo B590 bottom view 1 Battery lock 2 Battery pack 3 Battery latch 4 Security keyhole 5 Fan louvers 6 Monitor connector 7 Ethernet connector 8 HDMI port 9 USB 3.0 connector 10 Bottom slot cover1 1 The memory modules, hard disk drive, and wireless cards are
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    for full details. Lenovo computers contain the following types of CRUs: - Self-service CRUs: These CRUs unplug or are held by no more than two screws. Examples of these types of CRUs include the ac power adapter, power cord, battery, and hard disk drive. Other self-service CRUs depending
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    Overall 22 h g 21 20 19 18 17 16 15 14 f 13 Table 3. Parts list-Overall No. FRU (Overall) 1 LCD unit (see "LCD FRUs" on page 85.) 2 LB59A Power Board 3 LB58 LED Board W/Cable 82 Hardware Maintenance Manual 1 2 a 3 4 b 5 6 7 c 8 9 d 10 e 11 12 FRU no. CRU ID 90001037 N 90200814 N
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    ODD, 12.7mm Tray-in Rambo, Sony Optiarc, AD-7740H 25201106 * 10 ODD, 12.7mm Tray-in Rambo, TSST, SN-208AB 25201108 * 10 ODD, 12.7mm Tray-in Rambo, HLDS, GT50N 25201635 * 11 LB58 IO Board 90000234 N 12 LB59A Memory Door 90201905 N 13 HDD, 320GB 5400rpm,, MN500S WD3200LPVT-08G33T1 16200265
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    2x2 11abgn + BT4.0 Combo, Broadcom 43228 + 20702 17 WLAN, Intel 2x2 11bgn + BT4.0 Combo, Jackson Peak 1 17 WLAN, Non-Intel 1x1 11bgn, Broadcom BCM4313 1*1 BGN MOW 17 WLAN, Non-Intel 1x1 11bgn, Realtek bgn 1x1 HMC WLAN Stockton 18 Memory Module, DDRIII 1600 2GB, Samsung, M471B5773DH0-CK0 DDR3 1600
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    Intel B830 1.8G Q0 2M 2c PGA Processor 20 CPU, Intel I3-2328M 2.2G J1 3M 2c PGA Processor 21 LB59A Thermal Module DIS W/FAN 21 LB59A Thermal Module UMA W/FAN 22 Keyboard (see "Keyboard" on page 87.) - ac power adapter (see "ac power adapters In Lenovo B590 models, the type of LCD is 15.6-inch high
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    6 k Table 4. Parts list - LCD No. FRU 1 LB59A LCD Bezel WO/Camera Hole 1 LB59A LCD Bezel W/Camera Hole 2 LB58 Hinge L+R 3 LB58 Antenna R 4 LB58 Camera 0.3M 5 LB59A LCD Cover 6 LB58 Antenna L 7 Panel, 15.6 HD Wedge Glossy, SEC, LTN156AT24-L01 7 Panel, 15.6 HD Wedge Glossy, LGD, LP156WH4-TLN1 7 Panel
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    No. FRU 7 Panel, 15.6 HD Wedge Anti-Glare, CMI, N156BGE-L11 7 Panel, 15.6 HD Wedge Anti-Glare, LGD, LP156WH4-TLP1 Keyboard Table 5. Parts list - Keyboard (Dafon) Language Arabic 25204622 25204616 25204613 25204612 25204638 FRU NO. (Windows 8 ) 25209766 25209774 25209767 25209780 25209760 25209779
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    U.S. English U.S. English (International, with a Euro symbol) Table 7. Parts list - Keyboard (Chicony) Language Arabic Belgian Brazilian Portuguese Bulgarian 88 Hardware Maintenance Manual FRU NO. (Windows 7) 25204656 25204664 25204657 25204670 25204669 25204663 25204659 25204654 25204650 25204655
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    7. Parts list - Keyboard (Chicony) (continued Miscellaneous parts Table 8. Parts list - Miscellaneous parts FRU (a) LB58 Power Board Cable (b) LB58 USB Cable (c) LB58 DC-IN Bracket (d) LA48 HDD Bracket 60.4TE08.001 FRU NO. (Windows 7) 25204609 25204603 25204599 25204595 25204591 25204596 25204600
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    -65FD AA PA-1650-71I A065R049L Delta ADP-65SB A, EPA model Liteon PA-1650-53I, EPA model Chicony Power A065R028L, EPA model FRU no. 36200289 36200291 36200293 36200143 36200144 36200210 CRU ID * * * * * * Table 10. Parts list-3-pin (65 W) ac power adapters FRU Delta ADP-65FD BA Liteon PA-1650-72I
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    -1900-72I, EuP model Chicony A090A058L, EuP model Liteon PA-1900-54I, EPA model Delta ADP-90ZH DA, EPA model Chicony Power HP-BT090E13LF, EPA model FRU no. 36200294 36200296 36200298 36200030 36200031 36200032 CRU ID * * * * * * Power cords A Lenovo power cord for a specific country or region is
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    • LINETEK LP-30B + SPT-2 + LS15 1 m Table 14. Parts list - 3-pin power cords (Longwell) Country or region Argentina • Longwell LP-24+H03VV-F+LS-18 1 m Australia, New Zealand Longwell LP-37+H03VV-F+LS-18 1 m 92 Hardware Maintenance Manual FRU no. CRU ID 145000597 * 145000588 * 145000593 *
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    LP-71+VCTF+LS-33 1 m U.K. • Longwell LP-61L+H03VV-F+LS-18 1 m UL • Longwell LP-30B+SPT-2 18AWG+LS-18 1 m Table 15. Parts list - 3-pin power cords (Volex) Country or region Argentina • VOLEX VA2073+H03VV-F+VAC5S 1 m Australia, New Zealand • VOLEX AU10S3+H03VV-F+VAC5S 1 m Brazil • VOLEX CH10S3+H03VV
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    power cords (Linetek) Country or region Africa • LINETEK PE364("O")+H03VVH2-F+LS7H 1 m Argentina • LINETEK LP40+H03VVH2-F+LS7H 1 m Australia • LINETEK LP15A+H03VVH2-F+LS7 1 m Brazil • LINETEK LP25+H03VVH2-F+LS7H 1 m CCC • LINETEK PC205+RVV 0.75/2C+COC03 1 m CE • LINETEK LP21+H03VVH2-F+ LS7 1 m India
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    to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user's responsibility to evaluate and verify the operation
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    on Class B digital devices, refer to the corresponding information in the User Guide. Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Lenovo OneKey Windows is the trademark of the Microsoft group of companies. Intel is the trademark of
  • Lenovo B590 | Hardware Maintenance Manual - Page 103
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    Part Number: Printed in China (1P) P/N: *1P*
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Hardware Maintenance Manual
Lenovo B590