Lenovo IdeaPad 3i Chromebook Owner's manual

IdeaPad 3i Chromebook (15″, 6)
Hardware Maintenance Manual

First Edition (August 2021)
© Copyright Lenovo 2021.

Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. afety information . . . . . . 1
General sa ety . . . . . . . . . . . . . . . . 1
Electrical sa ety . . . . . . . . . . . . . . . . 1
Sa ety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Sa ety notices (multilingual translations) . . . . . . 4
Chapter 2. General checkout . . . . . 21
What to do irst . . . . . . . . . . . . . . . 21
CRU list . . . . . . . . . . . . . . . . . . 22
Chapter 3. Idetifying FRUs (CRUs) . . 23
Locate FRUs and CRUs . . . . . . . . . . . 23
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 27
Service tools . . . . . . . . . . . . . . . . 27
General guidelines. . . . . . . . . . . . . . 27
Remove the lower case . . . . . . . . . . . . 28
Remove the battery pack . . . . . . . . . . . 29
Remove the Wi-Fi card . . . . . . . . . . . . 30
Remove the I/O board . . . . . . . . . . . . 31
Remove the I/O board bracket . . . . . . . . . 33
Remove the I/O board upper cable . . . . . . . 33
Remove the I/O board lower cable . . . . . . . 34
Remove the touch pad cable. . . . . . . . . . 35
Remove the system board. . . . . . . . . . . 36
Remove the speakers . . . . . . . . . . . . 37
Remove the upper case. . . . . . . . . . . . 38
Remove the hinge cover . . . . . . . . . . . 39
Remove the LCD bezel . . . . . . . . . . . . 40
Remove the LCD module . . . . . . . . . . . 41
Remove the hinges . . . . . . . . . . . . . 42
Remove the antennas . . . . . . . . . . . . 43
Remove the camera board . . . . . . . . . . 43
Remove the microphone rubbers . . . . . . . . 45
Trademarks . . . . . . . . . . . . . . . . xlvii
© Copyright Lenovo 2021 i

ii IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

About this manual
This manual contains service and re erence in ormation or the ollowing Lenovo products.
Machine Machine type (MT)
IdeaPad 3 Chrome 15IJL6 82N4
Important:
• This manual is intended only or trained service technicians who are amiliar with Lenovo products.
• Be ore servicing a Lenovo product, be sure to read all the in ormation under Chapter 1 “Sa ety
in ormation” on page 1.
© Copyright Lenovo 2021 iii

iv IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

Chapter 1. afety information
This chapter presents the ollowing sa ety in ormation that you need to be amiliar with be ore you service a
Lenovo notebook computer.
General safety
Follow these rules to ensure general sa ety:
• Observe good housekeeping in the area o the machines during and a ter maintenance.
• When li ting any heavy object:
1. Make sure that you can stand sa ely without slipping.
2. Distribute the weight o the object equally between your eet.
3. Use a slow li ting orce. Never move suddenly or twist when you attempt to li t.
4. Li t by standing or by pushing up with your leg muscles; this action removes the strain rom 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 per orm any action that causes hazards to the customer, or that makes the equipment unsa e.
• Be ore you start the machine, make sure that other service technicians and the customer's personnel are
not in a hazardous position.
• Place removed covers and other parts in a sa e place, away rom all personnel, while you are servicing the
machine.
• Keep your tool case away rom walk areas so that other people will not trip over it.
• Do not wear loose clothing that can be trapped in the moving parts o a machine. Make sure that your
sleeves are astened or rolled up above your elbows. I your hair is long, asten it.
• Insert the ends o your necktie or scar inside clothing or asten it with a non-conductive clip, about 8
centimeters (3 inches) rom the end.
• Do not wear jewelry, chains, metal- rame eyeglasses, or metal asteners or your clothing.
Attention: Metal objects are good electrical conductors.
• Wear sa ety 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.
• A ter service, reinstall all sa ety shields, guards, labels, and ground wires. Replace any sa ety device that
is worn or de ective.
• Reinstall all covers correctly be ore returning the machine to the customer.
• Fan louvers on the machine help to prevent overheating o internal components. Do not obstruct an
louvers or cover them with labels or stickers.
Electrical safety
Observe the ollowing rules when working on electrical equipment.
Important: Use only approved tools and test equipment. Some hand tools have handles covered with a so t
material that does not insulate you when working with live electrical currents.Many customers have, near
their equipment, rubber loor mats that contain small conductive ibers to decrease electrostatic discharges.
Do not use this type o mat to protect yoursel rom electrical shock.
• Find the room emergency power-o (EPO) switch, disconnecting switch, or electrical outlet. I 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 be ore:
– Per orming a mechanical inspection
– Working near power supplies
© Copyright Lenovo 2021 1

– Removing or installing main units
• Be ore you start to work on the machine, unplug the power cord. I you cannot unplug it, ask the customer
to power-o the wall box that supplies power to the machine, and to lock the wall box in the o position.
• I you need to work on a machine that has e posed electrical circuits, observe the ollowing precautions:
– Ensure that another person, amiliar with the power-o controls, is near you.
Attention: Another person must be there to switch o the power, i 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 rom passing through your body.
– When using testers, set the controls correctly and use the approved probe leads and accessories or
that tester.
– Stand on suitable rubber mats (obtained locally, i necessary) to insulate you rom grounds such as
metal loor strips and machine rames.
Observe the special sa ety precautions when you work with very high voltages; Instructions or these
precautions are in the sa ety sections o maintenance in ormation. Use extreme care when measuring high
voltages.
• Regularly inspect and maintain your electrical hand tools or sa e operational condition.
• Do not use worn or broken tools and testers.
• Never assume that power has been disconnected rom a circuit. First, check that it has been powered o .
• Always look care ully or possible hazards in your work area. Examples o these hazards are moist loors,
non-grounded power extension cables, power surges, and missing sa ety grounds.
• Do not touch live electrical circuits with the re lective sur ace o a plastic dental mirror. The sur ace is
conductive; such touching can cause personal injury and machine damage.
• Do not service the ollowing parts with the power on when they are removed rom their normal operating
places in a machine:
– Power supply units
– Pumps
– Blowers and ans
– Motor generators
– Similar units as listed above
This practice ensures correct grounding o the units.
• I an electrical accident occurs:
– Use caution; do not become a victim yoursel .
– Switch o power.
– Send another person to get medical aid.
afety inspection guide
The purpose o this inspection guide is to assist you in identi ying potentially unsa e conditions. As each
machine was designed and built, required sa ety items were installed to protect users and service
technicians rom injury. This guide addresses only those items. You should use good judgment to identi y
potential sa ety hazards due to attachment o non-Lenovo eatures or options not covered by this inspection
guide.
I any unsa e conditions are present, you must determine how serious the apparent hazard could be and
whether you can continue without irst correcting the problem.
Consider these conditions and the sa ety hazards they present:
• Electrical hazards, especially primary power (primary voltage on the rame can cause serious or atal
electrical shock)
• Explosive hazards, such as a damaged cathode ray tube (CRT) ace or a bulging capacitor
• Mechanical hazards, such as loose or missing hardware
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To determine whether there are any potentially unsa e conditions, use the ollowing checklist at the
beginning o every service task. Begin the checks with the power o , and the power cord disconnected.
Checklist:
1. Check exterior covers or damage (loose, broken, or sharp edges).
2. Power o the computer. Disconnect the power cord.
3. Check the power cord or:
a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground
continuity or 0.1 ohm or less between the external ground pin and the rame ground.
b. The power cord should be the authorized type speci ied or your computer. Go to: http://
www.lenovo.com/serviceparts-lookup
c. Insulation must not be rayed or worn.
4. Check or cracked or bulging batteries.
5. Remove the cover.
6. Check or any obvious non-Lenovo alterations. Use good judgment as to the sa ety o any non-Lenovo
alterations.
7. Check inside the unit or any obvious unsa e conditions, such as metal ilings, contamination, water or
other liquids, or signs o ire or smoke damage.
8. Check or worn, rayed, or pinched cables.
9. Check that the power-supply cover asteners (screws or rivets) have not been removed or tampered
with.
Handling devices that are sensitive to electrostatic discharge
Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a di erence in charge between objects.
Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the
person handling the part are all at the same charge.
Notes:
1. Use product-speci ic ESD procedures when they exceed the requirements noted here.
2. Make sure that the ESD protective devices you use have been certi ied (ISO 9000) as ully e ective.
When handling ESD-sensitive parts:
• Keep the parts in protective packages until they are inserted into the product.
• Avoid contact with other people.
• Wear a grounded wrist strap against your skin to eliminate static on your body.
• Prevent the part rom touching your clothing. Most clothing is insulative and retains a charge even when
you are wearing a wrist strap.
• Use a grounded work mat to provide a static- ree work sur ace. The mat is especially use ul when
handling ESD-sensitive devices.
• Select a grounding system, such as those listed below, to provide protection that meets the speci ic
service requirement.
Note: The use o a grounding system to guard against ESD damage is desirable but not necessary.
– Attach the ESD ground clip to any rame ground, ground braid, or green-wire ground.
– When working on a double-insulated or battery-operated system, use an ESD common ground or
re erence point. You can use coax or connector-outside shells on these systems.
– Use the round ground prong o the ac plug on ac-operated computers.
Chapter 1.Sa ety in ormation 3

Grounding requirements
Electrical grounding o the computer is required or operator sa ety and correct system unction. Proper
grounding o the electrical outlet can be veri ied by a certi ied electrician.
afety notices (multilingual translations)
The sa ety notices in this section are provided in the ollowing languages:
• English
• Arabic
• Brazilian Portuguese
• French
• German
• Hebrew
• Japanese
• Korean
• Spanish
• Traditional Chinese
DANGER
DANGER
DANGER
4IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

DANGER
DANGER
DANGER
DANGER
DANGER
Chapter 1.Sa ety in ormation 5

6IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

PERIGO
PERIGO
PERIGO
Chapter 1.Sa ety in ormation 7

PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
8IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

DANGER
DANGER
DANGER
DANGER
Chapter 1.Sa ety in ormation 9

DANGER
DANGER
DANGER
DANGER
VOR ICHT
10 IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual

VOR ICHT
VOR ICHT
VOR ICHT
VOR ICHT
Chapter 1.Sa ety in ormation 11

VOR ICHT
VOR ICHT
VOR ICHT
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Chapter 1.Sa ety in ormation 13

14 IdeaPad 3i Chromebook (15″, 6) Hardware Maintenance Manual