LENOVO THINKBOOK PLUS GEN 6 ROLLABLE I (02) PDF Document

Follow these rules to ensure general safety:

Observe good housekeeping in the area of the machines during and after maintenance.

When lifting any heavy object:

1. Make sure that you can stand safely without slipping.

2. Distribute the weight of the object equally between your feet.

3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back. Do not attempt to lift any object that weighs more than 16 kg (35 lb) or that you think is too heavy for you.

Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

Before you start the machine, make sure that other people are not in a hazardous position.

Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine.

Keep your tool case away from walk areas so that other people will not trip over it.

Do not wear loose clothing that can be trapped in the moving parts of a machine. Make sure that your sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.

Insert the ends of your necktie or scarf inside clothing or fasten it with a non-conductive clip, about 8 centimeters (3 inches) from the end.

Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.

Attention: Metal objects are good electrical conductors.

Wear safety glasses when you are hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

Reinstall all covers correctly before returning the machine to the customer.

Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan louvers or cover them with labels or stickers.

Observe the following rules when working on electrical equipment:

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.

Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, 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

Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position.

If you need to work on a machine that has exposed electrical circuits, observe the following precautions:

Ensure that another person, familiar with the power-off controls, is near you.

Attention: Another person must be there to switch off the power, if necessary.

Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back.

Attention: An electrical shock can occur only when there is a complete circuit. By observing the above rule, you may prevent a current from passing through your body.

When using testers, set the controls correctly and use the approved probe leads and accessories for that tester.

Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; Instructions for these precautions are in the safety sections of maintenance information. Use extreme care when measuring high voltages.

Regularly inspect and maintain your electrical hand tools for safe operational condition.

Do not use worn or broken tools and testers.

Never assume that power has been disconnected from a circuit. First, check that it has been powered off.

Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, non-grounded power extension cables, power surges, and missing safety grounds.

Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage.

Do not service the following parts with the power on when they are removed from their normal operating places in a machine:

Power supply units

Pumps

Blowers and fans

Motor generators

Similar units as listed above

This practice ensures correct grounding of the units.

If an electrical accident occurs:

Use caution; do not become a victim yourself.

Switch off power.

Send another person to get medical aid.

The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service technicians from injury. This guide addresses only those items. You should use good judgment to identify potential safety hazards due to attachment of non-Lenovo features or options not covered by this inspection guide.

If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

Consider these conditions and the safety hazards they present:

Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock)

Explosive hazards, such as a damaged cathode ray tube (CRT) face or a bulging capacitor

Mechanical hazards, such as loose or missing hardware

To determine whether there are any potentially unsafe conditions, use the following checklist at the beginning of every service task. Begin the checks with the power off, and the power cord disconnected.

Checklist:

Check exterior covers for damage (loose, broken, or sharp edges).

Power off the computer. Disconnect the power cord.

Check the power cord for:

a. A third-wire ground connector is in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and the frame ground.

b. The power cord should be the authorized type specified for your computer.

c. Insulation must not be frayed or worn.

Check for cracked or bulging batteries.

Remove the cover.

Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo alterations.

Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

Check for worn, frayed, or pinched cables.

Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Before the computer is powered on after FRU replacement, make sure that all screws, springs, and other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble a standby battery, recharge it, throw it into fire or water, or short-circuit it. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack. Use of an incorrect battery can result in ignition or explosion of the battery.

The lithium battery can cause a fire, an explosion, or a severe burn. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing.

To avoid shock, do not remove the plastic cover that protects the lower part of the inverter card.

Though the main batteries have low voltage, a short-circuited or grounded battery can produce enough current to burn personnel or combustible materials.

Unless hot swap is allowed for the FRU being replaced, do as follows before removing it: power off the computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any interconnecting cables.

The CRU list for the Model: ThinkBook Plus G6 Rollable (MT: 21TR) is as follows:

When removing or replacing a FRU, ensure that you observe the following general guidelines:

It is recommended that only certified trained personnel perform service on the computer. For customers electing to repair their own machines, please follow all instructions carefully.

Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs are listed at the beginning of each FRU replacement procedure. Remove them in the order in which they are listed.

Follow the correct sequence in the steps for removing a FRU, as shown in the illustrations by the numbers in square callouts.

When removing a FRU, move it in the direction as shown by the arrow in the illustration.

To install a new FRU in place, perform the removal procedure in reverse and follow any notes that pertain to replacement.

When replacing a FRU, carefully retain and reuse all screws.

When replacing the base cover, reapply all labels that come with the replacement base cover. If some original labels are not included with the replacement base cover, peel them off from the original base cover and paste them on the replacement base cover.

Before removing any FRU or CRU, shut down the computer and unplug all power cords from electrical outlets.

Attention: After replacing a FRU, do not turn on the computer until you have ensured that all screws, springs, and other small parts are in place and none are loose inside the computer. Verify this by shaking the computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to and can be damaged by ESD. Before touching it, establish personal grounding by touching a ground point with one hand or by using an ESD strap (P/N 6405959).

Thermal interface materials are typically applied between a heat sink and a CPU (and/or GPU) die to enhance the heat transfer capability of the heat sink. If thermal interface materials are exposed during computer servicing, such as when replacing the heat sink or system board, it is important to handle the thermal interface materials properly.

You need to completely remove the old thermal interface materials from the CPU and/or GPU die.

You need to apply new thermal interface materials onto the heat sink according to the type, quantity, and application areas specified in this publication.

The table below provides information on the type and quantity of thermal interface materials, as well as the specific area on the heat sink where these materials should be applied:

When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether the LCD functions normally. To run LCD Self Test:

Ensure that the computer is connected to ac power. Then, press the power button for about seven seconds to turn off the computer.

Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in sequence across the entire screen, it indicates that the LCD functions normally.

Note: As per design, when the computer is turned off to run the LCD self-test, its screen is rolled in and cannot fully display the five colors.

The test lasts for about 20 seconds and then exits automatically. You also can press the power button to exit the test.

Make sure the computer has been shut down before servicing the computer.

Step 1. Place the computer upside down on a flat surface with the hinge facing the operator, and remove eight screws.

Table 4. Screw measurements, torque and quantity

Step 2. Place your right hand against the lower right corner and grasp the upper right corner with your left hand. Twist the lower case with your left hand and pull it down to remove it.

Make sure the following FRUs (or CRUs) have been removed:

“Remove the lower case” on page 28

Step 1. Remove the WLAN mylar, disconnect the antenna cables from the wireless adapter and pull them out of the cable guides on the battery, and then disconnect the battery connector.

Attention: Use your fingernail to pull the battery connector to unplug it. Do not pull the cable.

Step 2. Remove four screws and then remove the built-in battery.

Table 5. Screw measurements, torque and quantity

Make sure the following FRUs (or CRUs) have been removed:

“Remove the lower case” on page 28

“Remove the built-in battery” on page 29

Step 1. Loosen four screws (label 1), remove two screws (label 2), and then remove the heat sink (label 3).

Table 6. Screw measurements, torque and quantity

“Remove the lower case” on page 28

“Remove the speakers” on page 31

Step 1. Disconnect two connectors (label 1), remove six screws (label 2), and then remove the speakers (label 3).

Table 7. Screw measurements, torque and quantity

“Remove the lower case” on page 28

“Remove the speakers” on page 31

Step 1. Disconnect the FPC connector (label 1) and pull the cable out (label 2), remove two screws (label 3), and then remove the audio board FPC (label 4).

Table 8. Screw measurements, torque and quantity

“Remove the lower case” on page 28

Step 1. Remove two screws and then remove the left and right back walls.

“Remove the lower case” on page 28

Step 1. Remove one screw, pull the solid-state drive out, and then peel off the foil around the solid-state drive.

Table 9. Screw measurements, torque and quantity

“Remove the lower case” on page 28

Step 1. Remove four screws, disconnect the left and right fan cables, and then remove the fans.

Table 10. Screw measurements, torque and quantity

“Remove the lower case” on page 28

“Remove the built-in battery” on page 29

“Remove the heat sink” on page 31

“Remove the speakers” on page 31

“Remove the audio board FPC” on page 32

“Remove the M.2 solid-state drive (SSD)” on page 34

“Remove the fan” on page 35

Step 1. Remove fourteen screws (label 1) on the system board and then remove two screws (label 2) on the screw bracket.

Step 2. Remove the screw bracket, disconnect four connectors, and then remove the system board.

Table 12. Screw measurements, torque and quantity

Some key product information and settings are stored in the ROMs of the PC’s system board. The information and settings are essential for using and servicing a Lenovo PC. After replacing a system board for a Lenovo PC, you need to use a Lenovo-provided software tool to write key information-including machine type model (MTM), serial number (SN), and product name-as well as settings such as keyboard language to the replacement system board.

For users, follow the following steps:

Attention: Take extra caution when entering the MTM and SN and when selecting the product name and keyboard language. Carefully verify these details before committing the writing action. Once recorded on the system board, they cannot be altered. Consult Lenovo service if you are uncertain about the MTM, SN, and product name for your PC.

Step 1. Connect the ac power adapter and turn on the computer.

Step 2. Download the tool package and double-click the WinMBDWizard.exe file to run the tool. To download the tool, go to https://support.lenovo.com/solutions/HT516532.

Step 3. Follow the on-screen instructions to input the MTM and SN, select the product name and keyboard language of the computer.

Step 4. Click Start Update to update the product information.

Step 5. Click Yes in the confirmation window to continue the update.

Step 6. Click Finish to close the tool.

Step 7. Click Yes in the confirmation window to restart the computer and apply the configuration on the system board.

Note: Do not turn off the computer or disconnect the computer from ac power during the whole process.

“Remove the lower case” on page 28

“Remove the heat sink” on page 31

“Remove the fan” on page 35

“Remove the system board” on page 36

Step 1. Remove five screws (label 1), remove the I/O board FPC (label 2), and then lift the power board (label 3).

Step 2. Remove two screws that secure the fingerprint reader frame to the base cover (label 1), remove the fingerprint reader frame (label 2), and remove the power board with the fingerprint reader board (label 3).

Table 13. Screw measurements, torque and quantity

Step 3. Disconnect the connectors on the power board (label 4) and pull out the fingerprint reader FFC (label 5). Then, tear off the fingerprint reader board from the power board (label 6).

Table 14. Screw measurements, torque and quantity

Replacement parts:

Power board

I/O board FPC

Fingerprint reader board