Lenovo A7-50 Tablet User Manual

Lenovo A3500Hardware MaintenanceManual

Lenovo A3500 Hardware Maintenance Manual6Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to elect

Safety information7The safety notices in this section are provided in English, French, German, Hebrew, Italian, Japanese, and Spanish.Safety notices:

Lenovo A3500 Hardware Maintenance Manual8Safety notice 2DANGERSome standby batteries contain a small amount of nickel and cadmium. Do not disassemble

Safety information9Safety notice 3DANGERThe battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or shor

Lenovo A3500 Hardware Maintenance Manual10Safety notice 4DANGERThe lithium battery can cause a fire, an explosion, or a severe burn. Do not recharge i

Safety information11Safety notice 5If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affe

Lenovo A3500 Hardware Maintenance Manual12Safety notice 6DANGERTo avoid shock, do not remove the plastic cover that protects the lower part of the inv

Safety information13Safety notice 8DANGERBefore removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the ba

Lenovo A3500 Hardware Maintenance Manual14Some models of Lenovo computer are equipped from the factory with an optical storage device such as a CD-ROM

Safety information15A CD-ROM drive, a DVD-ROM drive, or any other storage device installed may contain an embedded Class 3A or Class 3B laser diode. N

Note:Before using this information and the product it supports, be sure to read the general information under “Notices” on page 70.First Edition (Janu

Lenovo A3500 Hardware Maintenance Manual16This chapter presents the following important service information:• “Strategy for replacing FRUs” on page 16

Important service information17Important notice for replacing a system boardSome components mounted on a system board are very sensitive. Improper han

Lenovo A3500 Hardware Maintenance Manual18RoHS, The Restriction of Hazardous Substances in Electrical and Electronic Equipment Directive (2002/95/EC)

General checkout19This chapter presents the following information:• “What to do first” on page 20• “Power system checkout” on page 21Before you go to

Lenovo A3500 Hardware Maintenance Manual20When you do return an FRU, you must include the following information in the parts exchange form or parts re

General checkout21To verify a symptom, follow the steps below:1. Turn off the computer.2. Remove the battery pack.3. Connect the AC adapter.4. Make su

Lenovo A3500 Hardware Maintenance Manual22Checking the internal battery statusTo check the battery status of the tablet, do either of the following:•

Related service information23This chapter presents the following information:• “Security” on page 23• “Power management” on page 23Security settings i

Lenovo A3500 Hardware Maintenance Manual24This chapter presents the following product-specific service references and product-specific parts informati

Lenovo A350025Ports• Micro-USB (USB 2.0), 5-pin• Earphone, 3.5mm•SIM card slot• T-flash card slotCommunication• WiFi, 802.11b/g/n• WiFi Direct• WiFi d

iiiAbout this manual...ivSafety information...1General safety ...

Lenovo A3500 Hardware Maintenance Manual26This section presents notices related to removing and replacing parts. Read this section carefully before re

Lenovo A350027This section presents exploded figures with the instructions to indicate how to remove and replace the FRU. Make sure to observe the fol

Lenovo A3500 Hardware Maintenance Manual281010 Rear cover and side key1. Open the card slot cover on the rear cover using a guitar pick.Figure 1-1. Op

Lenovo A3500293. Hold the tablet in one hand and use a guitar pick to unlock the rear cover from the tablet along the joint line as shown in the figur

Lenovo A3500 Hardware Maintenance Manual305. Detach the side key from the rear cover using a pair of tweezers.Figure 1-5. Detaching the side key6. Rem

Lenovo A3500311020 Battery packFor access, remove the following FRU:• “1010 Rear cover and side key” on page 281. Remove screw for fixing the steel

Lenovo A3500 Hardware Maintenance Manual322. Remove the steel frame from the front module as shown in the figure below.Figure 2-2. Removing the steel

Lenovo A3500333. Detach the battery FPC from its connector on the PCBA using a guitar pick.Figure 2-3. Detaching the battery FPC4. Detach the battery

Lenovo A3500 Hardware Maintenance Manual345. Remove the battery pack from the front module of the tablet.Figure 2-5. The removed battery pack

Lenovo A3500351030 Rear cameraFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 311. Deta

ivThis manual contains service and reference information for the following Lenovo product:• Lenovo A3500Use this manual to troubleshoot problems.The m

Lenovo A3500 Hardware Maintenance Manual363. Remove the rear camera from the tablet.Figure 3-3. The removed rear camera

Lenovo A3500371040 PCBAFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 31anddetach the

Lenovo A3500 Hardware Maintenance Manual382. Peel off the mylar on the TP FPC connector on the PCBA.Figure 4-2. Position of the mylar3. Unlock the TP

Lenovo A3500394. Detach the TP FPC from the PCBA surface using a thin flat blade while at the same time pulling out the FPC from its connector.Figure

Lenovo A3500 Hardware Maintenance Manual407. Pull out the main FPC from its connector using a pair of tweezers.Figure 4-7. Pulling out the main FPC8.

Lenovo A3500419. Detach the power key FPC from the front module of the tablet using a guitar pick or a thin flat blade.Figure 4-9. Detaching the power

Lenovo A3500 Hardware Maintenance Manual4211. Detach the reset key FPC from the front module of the tablet using a guitar pick or a thin flat blade.Fi

Lenovo A35004313. Slowly detach the PCBA (with other parts connected to it at this stage of the removal procedure) from the front module of the tablet

Lenovo A3500 Hardware Maintenance Manual4415. Desolder the power key FPC from the PCBA using a soldering iron and a solder sucker.Figure 4-15. Positio

Lenovo A35004517. Desolder the volume key FPC from the PCBA using a soldering iron and a solder sucker.Figure 4-17. Position of desoldering the volume

Safety information1This chapter presents the following safety information that you need to get familiar with before you service a Lenovo computer:•“Ge

Lenovo A3500 Hardware Maintenance Manual4620. Desolder the reset key FPC from the PCBA using a soldering iron and a solder sucker.Figure 4-20. Positi

Lenovo A35004723. Desolder the FPC of the front camera from the PCBA using a soldering iron and a solder sucker.Figure 4-23. Position of desoldering t

Lenovo A3500 Hardware Maintenance Manual481050 ReceiverFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Batter

Lenovo A3500491060 Power key FPCFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 31and d

Lenovo A3500 Hardware Maintenance Manual501070 Volume key FPCFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020

Lenovo A3500511080 Reset key FPCFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 31and d

Lenovo A3500 Hardware Maintenance Manual521090 Front cameraFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Ba

Lenovo A3500531100 Speaker and antenna assemblyFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack”

Lenovo A3500 Hardware Maintenance Manual543. Detach the RF cable of the speaker and antenna assembly from its connector on the PCBA.Figure 10-3. Detac

Lenovo A3500555. Remove screws for fixing the speaker and antenna assembly onto the front module of the tablet.Figure 10-5. The screws on the speake

Lenovo A3500 Hardware Maintenance Manual2Follow these rules below to ensure general safety:• Observe a good housekeeping in the area where the machine

Lenovo A3500 Hardware Maintenance Manual567. Remove the speaker and antenna assembly from the front module of the tablet.Figure 10-7. The removed spea

Lenovo A3500571110 MicrophoneFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 311. Remov

Lenovo A3500 Hardware Maintenance Manual583. Desolder the wires of the microphone from the small PCB of the main FPC using a soldering iron and a sold

Lenovo A3500591120 Vibrator motorFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 311. R

Lenovo A3500 Hardware Maintenance Manual603. Desolder the wires of the vibrator motor from the small PCB of the main FPC using a soldering iron and a

Lenovo A3500611130 Main FPCFor access, remove the following FRUs:• “1010 Rear cover and side key” on page 28• “1020 Battery pack” on page 31anddesolde

Lenovo A3500 Hardware Maintenance Manual623. Unlock the main FPC connector in the front module using a guitar pick.Figure 13-2. Unlocking the main FPC

Lenovo A3500635. Pull out the main FPC from its connector using a pair of tweezers.Figure 13-4. Pulling out the main FPC6. Detach the small PCB of the

Lenovo A3500 Hardware Maintenance Manual647. Remove the main FPC from the tablet.Figure 13-6. The removed main FPC

Lenovo A350065Front viewReceiverFront cameraSpeakerLocationsab

Safety information3Observe the following rules when working on electrical equipments.• Find the room emergency power-off (EPO) switch for disconnectin

Lenovo A3500 Hardware Maintenance Manual66Rear viewMicro-USB connectionRear cameraEarphone socketSIM card slotT-flash card slotMicrophoneVolume keyPow

Lenovo A350067This section presents the following service parts:• “Overall” on page 67• “Screw” on page 69Overall Parts list

Lenovo A3500 Hardware Maintenance Manual68Table 1. Parts list–OverallNo. FRU FRU No. CRU ID1 A3500 battery pack 89503039 N2 A3500 side key N/A N3 A350

Lenovo A350069ScrewTable 2. Parts list–ScrewFRU P/N CRU IDPhillips flat head screw, M1.4 x 3.0 46104009 NPhillips flat head screw (wide), M1.4 x 2.0 4

Lenovo A3500 Hardware Maintenance Manual70Lenovo may not offer the products, services, or features discussed in this document in all countries. Consul

Notices71Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environme

Lenovo A3500 Hardware Maintenance Manual4• Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, n

Safety information5The purpose of this inspection guide is to assist you in identifying potential unsafe conditions. As each machine was designed and