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FE170CG System RepairGuides
1
FE170CG System Repair Guides No Power Display Error Camera Error Touch Error Audio Error Bluetooth Error SD/ SIM Card Error 2/3G Voice Error BT/WIFI Error GSP Error
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No Power Display Error Camera Error Touch Error Audio Error Bluetooth Error SD/ SIM Card Error 2/3G Voice Error BT/WIFI Error GSP Error
No PowerNo Power
Check Battery voltageless 3.7v
Press Power button, and LCD nodisplay
ConnectAdapt to charge battery
Y
N
3
Change LCD moduleand Try to power on
Remove Speakerand try to power on
Remove AMIC and Vibratorand try to power on
Change LCD FFCand Try to power on
Replace main PCBA
Display ErrorDisplay color
error
Check LCD FFCConnector damage or not
Replace LCD FFC
Display Flick or color error
4
Replace PCBA
Replace LCD
Camera ErrorCamera Error
Check image version
Open cam app failOr capture fail
Check EMMC free spaceless 100Mb
Update image or FOTA
Move data to SD card orclear redundancy data
N
N
Y
5
Replace cam module
Replace PCBA
Y
Y
Touch ErrorTouch Error
Touch can’t use
Using MPAP tocheck sensor is ok or not
Check touch FPC /connector is damage or not
Touchabnormal
Using MPAP tocheck touch sensor
YCheck FW Version
Update FW
N
Check touch FPC /connector is damage or not
6
Check touch FPC /connector is damage or not
ReplaceTouch sensor module
Replace PCBA
Update FW
External AbnormalExternal Normal
Plug in Headphoneand mic-phone and
test if the audiofunctions are normal
Audio error
Audio Error
7
Replace PCBA
Replace Speaker totry at first
Checking volume mutesetting
Check SD Connector isdamage or not
Change other brandSD card
SD Card error
SD Card Error
Detect SD card fail
Y
N Change other brand sd card
8
Replace PCBA
Update image
N Change other brand sd card
Check SIM Connector isdamage or not
Check IMEI &MODEM image &
kernal image
SIM Card error
SIM Card ErrorDetect SIM card fail
Y
NUpdate image
9
Replace PCBA
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Phone FunctionTest Process
Insert Test SIM &Check Tester Status Make call Test Complete
CheckAntenna
ConnectionStatus
(Change ifnecessary)&Make a call
Yes
No
10
Connectphone and
tester with RFcable &
make call
Check TXpower withphone tool
Check eachcomponent @TX/RX path
CheckAntenna
ConnectionStatus
(Change ifnecessary)&Make a call
Change PhoneAntenna
Re-download OSimage &
Re-calibration
No
Check the power @each test point inTX/RX path and
change component
No
No
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Check thesignal BPFis normal
Yes
No
Yes
Replace the WiFiModuleU4101
Replace the BT/GPS Module
U4402
11
RF IOSignal is
Normally orNot
NoTest Complete
Yes
NoTurn On Device
Yes
Yes
CheckBT/WiFiTrace
No
Check thesignal
Switch isnormal
Can BT/WiFiFunction
Worknormally?
No
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Check theSignalLNA isNormal
Yes
Replace theBT/GPSModuleU4402
Yes
12
Check theSignalSAW isNormal
Check theDevice
Can ReceiveCorrect C/N
GPS Test Complete
Yes
Turn On DeviceYesNo
No No
Check theGPS trace
and AntennaPattern
