Lenovo A328 User manual

LENOVO
1
A328 SERVICE MANUAL
V1.0

LENOVO
2
Documents statement:
zThis document is intended for use by qualified service
personnel only.
zThe documents only are used for service reference.

LENOVO
3
TABLE OF CONTENT
Section page
1. Product Figures ..........................................................................5
1-1. Exploded view...................................................................5
1-2. Product Main Function ......................................................7
1-3. General Specification........................................................7
2. Block Diagrams ..........................................................................8
2-1. System Diagrams..............................................................8
2-1-1 BBIC Diagrams.........................................................8
2-2. Power Management Diagrams..........................................9
3. Flow Chart of Troubleshooting .................................................11
3-1.Baseband.........................................................................11
3-1-1. Phone does not start up troubleshooting...............11
3-1-2. SIM troubleshooting...............................................14
3-1-3. MIC troubleshooting...............................................15
3-1-4. T-Flash troubleshooting.........................................20
3-1-5. Speaker troubleshooting........................................21
3-1-6. Receiver troubleshooting.......................................21
3-1-7. Vibra troubleshooting.............................................22
3-1-8. Camera troubleshooting ........................................24
3-1-9. FM radio troubleshooting.......................................28
3-1-10. Display troubleshooting .......................................30
3-1-11. Bluetooth WIFI GPS troubleshooting...................32
3-1-12. Keyboard troubleshooting....................................32
3-1-13. Charge troubleshooting .......................................34

LENOVO
4
3.2 RF.....................................................................................38
3-2-1.GSM/DCS RX troubleshooting ...............................38
3-2-2.DCS/GSM TX Part..................................................39
4. Main Element Specifications ....................................................39
4-1 Baseband part..................................................................39
4-1-1.BBIC(U108) ............................................................39
4-1-2. Power Management Control(U501).......................49
4-1-3. WIFI/GPS/FM/BT IC(U1102) .................................52
4-1-4. Charge IC(U502) ...................................................55
4-1-5. NAND+SDRAM(U401)...........................................56
4-2. RF part ............................................................................59
4-2-1. RF PA(U101) .........................................................59
4-2-2. RF TRANSCEIVER (U201) ...................................60
5. Test Instructions .......................................................................67
6. Glossary ...................................................................................68
7. Warnings and cautions.............................................................70

LENOVO
5
1. Product Figures
1-1. Exploded view
U101 RF PA
Damage caused by failure：：
Call fault
U501 Power Management
Damage caused by failure：
large currents;does not boot;
U108 BBIC
Damage caused by failure
does not boo;crashes
U401 NAND SDRAM
Damage caused by failure：
does not boot; showing white;
storage failures,;software
problems
U204/U205 RX filter
Damage caused by failure：
Call failed
U106 RF-TR
Damage caused by failure：
RF faults，Call fault
X1101 X101 26M Crystals
Damage caused by failure：：
Can not boot;WIFI、GPS、BT、
FM test fail
U1102 MT6627 IC
Damage caused by failure：
WIFI/GPS/FM/BT does not
work
U801 G-sensor IC
Damage caused by failure: The
screen can not be rotated
U701 Backlight driving chip
Damage caused by failure：
NO display
U502 Charger IC
Damage caused by failure：
Does not charge：
U303Audio PA IC
Damage caused by failure：：
Call fault