Company confidential LV81-LV82 Trouble Shooting презентация

Содержание

Function Block

Слайд 1LV81-LV82 Trouble Shooting
Publisher：NJD HW Team
Date：2014.2.14

Слайд 2Function Block

Слайд 3USB Conn.
M/B Top Placement #1
MT6582
MCP
MT6323
Audio Jack
Receiver
Front Camera

Backup Batt.
SKY77593
MT6166

Слайд 4M/B Top Placement #2

MIC
LCM Conn.

Speaker

Слайд 5M/B Bottom Placement #1
Batt. Conn.
SD Socket
SIM Socket #1
SIM Socket #2
Sidekey FPC
Main

Camera

MT6627

G-Sensor

TP Conn.

Слайд 6M/B Bottom Placement #2

Vibrator

Слайд 7BB Common Question
BB-1 Can not power on
BB-2 Can not download
BB-3

Can not charging
BB-4 SIM Card Identification error
BB-5 Can not display
BB-6 sensor function fail
BB-7 Touch Panel no function
BB-8 Vibrator no function
BB-9 Camera can not turn on
BB-10 MIC no function
BB-11 Speaker no function
BB-12 Audio function fail
BB-13 SD Card no function

Слайд 8BB-1 Can not power on (無法開機) (1/4)
1. Check VBATT (TP09 >

3.6V)
2. Check J802 short to GND?
3. Check below?
PWRKEY(TP11 > 2.8V)
TP11short to GND

TP09 > 3.6V

J802

TP11 > 2.8V

Слайд 95. Check power level MT6323 good or bad?
VPROC_PMU at R109 (0.9V~1.1V)
VSYS_PMU

at L303 (1.8V)

BB-1 Can not power on (無法開機) (2/4)

VSYS_PMU

VPROC_PMU

Слайд 10BB-1 Can not power on (無法開機) (3/4)
Debug Flowchart

Слайд 11BB-1 Can not power on (無法開機) (4/4)
VCORE≈0.7V~1.3V
VPORC≈0.7V~1.3V
VIO18=1.8V
VIO28=2.8V
VM12_INT=1.2V
VA1=2.5V
VA2=2.5V
VUSB=3.3V
VTCXO=2.8V
VMC=3.3V
VMCH=3.3V
RESET=1.8V




MT6323 Power On/Off sequence

Слайд 12BB-2 Can not download (無法更新軟件) (1/3)
1. Check power voltage。（around 0.109A)
2. Check

F07001

提供CPU内部USB驱动电路供电电源,电压为3.3V左右

Слайд 13BB-2 Can not download (無法更新軟件) (2/3)
3. Check RF transceiver 26MHz and

RF chip good or bad when can’t get into META mode.




Sysclk由Y1301通过RF transceive output reference clock for MTK6582 .此异常会造成开机后电流维持在60mA.



Слайд 14BB-2 Can not download (無法更新軟件) (3/3)
4. Check com port good or

bad



1: It should be show MTK USB Port when plug DL

2:It should be show META mode after DL and open
BB/RF META tool

Слайд 15BB-3 Can not charging (無法充電) (1/2)
1. Check R332 Pin1 (BAT_ID) around

10kΩ.
2. check voltage >4.5V
3. Check J801 USB connector good or bad?










Слайд 16BB-3 Can not charging (無法充電) (2/2)
4. check CHR_LDO good or bad

when plug USB

Check charger

Check Ω

Charging current sense

Battery voltage sense

Слайд 17BB-4 SIM Card Identification error (SIM卡無法識別) (1/2)
1. SIM detect good or

bad?
2. check J3200, J3201soldering good or bad?
3. check SRST, VSIM,SIO and SCLK signal




Слайд 18BB-4 SIM Card Identification error (SIM卡無法識別) (2/2)




Слайд 19BB-5 Can not display (畫面無法顯示或顯示異常) (1/2)
1. check J1200 soldering good or

bad?
2. replace LCM.
3. check R1202, R1203 and L1202, L1203, L1204 good or bad?
4. check LCM voltage(VIO28_PMU and VIO18_PMU)?
5. if no back light，check U901, R1914, R915, D901, R903



Backlight正負極

LCM兩組工作電壓

Слайд 20BB-5 Can not display (畫面無法顯示或顯示異常) (2/2)
Debug Flow

Слайд 21G-sensor voltage = VIO18
BB-6 sensor function fail (感測器不良)
All sensor control by

I2C, if one of sensor function fail, you need to check all of them
G-sensor


G-sensor no function






Слайд 22BB-7 Touch Panel no function (無法觸屏) (1/2)
1. check TP Connector ?
2.

replace TP，
3. check J2001?
4. check TP vlotage (VDD28_PMU and VDD1V8_PMU)?
5. check I2C, Reset, INT good or bad?


Слайд 23BB-7 Touch Panel no function (無法觸屏) (2/2)
TP circuit
TP voltage = 2.8V/1.8V

Слайд 24BB-8 Vibrator no function (馬達無振動)
1. check vibrator = 30Ω
2.check vibrator good

or bag?
3. check C3331 good or bad?
4. check the voltage of VIBR_PMU when power on





Слайд 25BB-9 Camera can not turn on (無法攝像) (1/3)
1. check the camera

connector?
2. replace Camera module.
3. check J902?
4. check EMI901, EMI902, EMI903?
5. check Camera voltage (VCAMD_IO_PMU, VCAMA_PMU)?

Слайд 26BB-9 Camera can not turn on (無法攝像) (2/3)


Camera I2C

Слайд 27BB-9 Camera can not turn on (無法攝像) (3/3)
1:camera function fail, check

/reset/CLK/PWD good or bad
2:balck screen: check camera DATA。

VREF/HREF: Sensor垂直/水平參考信號
MCLK:來自CPU的主時鐘輸出
PCLK:象數時鐘輸入

Слайд 28BB-10 MIC no function (麥克風無作用)
1. check J1003 Microphone around 0.95KΩ
2.

check Mic around voltage



MIC周邊電路


MIC

Слайд 29BB-11 Speaker no function (喇叭無聲)
1. check Speaker around 8Ω
2. check Speaker

voltage



SPK周邊電路


SPK

Слайд 30BB-12 Audio function fail (Audio 不良) (1/4)
Audio
1:wave play back fail? check

SPK
2:receiver fail ?check receiver.
3:headset fail ?check headset.
4:phone mic to headset fail ?check MIC .
5:headsetmic to headset fail ?check headset to Mic.
As below

Слайд 31BB-12 Audio function fail (Audio 不良) (1/4)
Check Speaker:




Слайд 32BB-12 Audio function fail (Audio 不良) (2/4)
Check receiver路径:





Check MIC

CPU


MIC1
MIC


Слайд 33BB-12 Audio function fail (Audio 不良) (3/4)
Check Headset:



audio jack
MIC

Слайд 34BB-12 Audio function fail (Audio 不良) (4/4)
Check MIC:



MIC?PMU
PMU

Слайд 35BB-13 SD Card no function (SD Card無作用)
SD card signal
SD card clock
SD

card 供電端

If SD card fail,check check U1604 and U1605 CMD/CLK/DET/DATA

SD card control signal

SD card data transfer

1.check SD connector。
2.check voltage around good or bad?

Слайд 36BB-13 SD Card no function (SD Card無作用)






SD card

Слайд 37WIFI/BT/GPS
I/Q Signal

SCLK,DataSignal
Connect to CPU MT6582
Singal 26M TCXO，Output Clock to MT6627

WIFI/BT/GPS 功能使用的IC為MTK

MT6627

Слайд 38MT6627 Power supply
WIFI/BT/GPS

From PMU MT6323


Output to MT6627


Слайд 39GSM PA + Switch
GSM Vbat 供電
GSM LB Tx input路徑
GSM HB Tx

input路徑

WCDMA Band HB/LB TRx 路徑

GSM HB/LB Rx 路徑

Logic control signal

Logic control table

Слайд 40GSM RX
GSM HB/LB電路:
2G LB Rx
2G HB Rx
Balance output to transceiver LB

Port

Balance output to transceiver HB Port

Слайд 41WCDMA Band1/8 TRx (LV82)
Tx : from Transceiver
Band 8 Tx
Rx :

balance to transceiver

TRx: connect with ANT Switch

Rx : balance to transceiver

TRx: connect with ANT Switch

Band 1 Tx

Слайд 42WCDMA Band2/5 TRx (LV81)
Tx : from Transceiver
Band 5 Tx
Rx :

balance to transceiver

TRx:connect with ANT Switch

Rx: balance to transceiver

TRx:connect with ANT Switch

Band 2 Tx

Слайд 43RF introduction: MT6166 Function Block

Слайд 44RF introduction: MT6166 Pin assignment

Слайд 45RF introduction: Antenna Circuit
Antenna Circuit
RF included 2G/3G/WIFI/GPS,

Main

ANT RF Paths

WIFI ANT RF Paths

Wifi /BT path

GPS path

Слайд 46RF introduction:2G/3G Main Antenna Position
2G/3G Matching


Слайд 47RF introduction: WIFI Antenna Position


Слайд 48RF常見問題
RF-1:internet fail
RF-2:GSM problem
RF-3:WCDMA problem
RF-4:GSM/WCDMA Rxproblem
RF-5:WIFI problem



Слайд 49RF-1:internet fail
Check signal ,SIM card good or bad? Coaxial cable?

Слайд 50RF-2:GSM Trouble shooting (1/3)
Check GSM

Tx I/Q Signal

Слайд 51RF-2:GSM Trouble shooting (2/3)
GSM
Check voltage of 2G PA and ASM into

U1302?
Check below voltage



Слайд 52RF-2:GSM Trouble shooting (3/3)
GSM
Check shooting voltage
Use spectrum probe to check



High band GSM signal




Слайд 53RF-3:WCDMA Trouble shooting (1/5)
WCDMA
Check IQ
check wave


Слайд 54RF-3:WCDMA Trouble shooting (2/5)
WCDMA
Check wave





Слайд 55RF-3:WCDMA Trouble shooting (3/5)
WCDMA
Transceiver-3G PA, PA-Duplexer


From MT6166

WCDMA BAND 1/2 signal


From MT6166

WCDMA

BAND 1/2 signal

Слайд 56RF-3:WCDMA Trouble shooting (4/5)
WCDMA
Check ASM voltage
Check wave



Слайд 57RF-3:WCDMA Trouble shooting (5/5)
GSM PA+ASM
ASM-RF Con (GSM + WCDMA)



Слайд 58RF-4:GSM/WCDMA Trouble shooting
receive
Check Antenna switch Module control voltage
Check wave



Слайд 59RF-5:WIFI/BT Trouble shooting(1/3)
Check U1501 output 26MHz



WIFI/BT Tx/Rx

26MHz

Слайд 60RF-5:WIFI/BT Trouble shooting(2/3)
WIFI Tx/Rx
U15004
U15000
26MHz

Слайд 61RF-5:GPS Trouble shooting(3/3)
Check GPS xLNA output




GPS Rx

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