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FLY SERVICE SUPPORT

 

 

 

 

Fly IQ4401 Service Manual 

 

   

 

 

 

 

 

CAUTIONS 

 

Please refer to the phone’s user’s guide for instructions relating to operation, care, and maintenance, which include important 

safety information. 

Servicing and alignment must be undertaken by qualified personnel only. 

Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn. 

Use only approved components as specified in the parts list. 

Ensure all components, modules, screws, and insulators are correctly re-fitted after servicing and alignment 

Ensure all cables and wires are repositioned correctly 

Electrostatic discharge can easily damage the sensitive components of electronic products. Therefore, every service supplier 

must observe the precautions which mentioned above.   

 

 

 

Product Hardware Introduction 

Base Chip Set 

BB 

MT6572A/X 

PMIC 

MT6323 

Transceiver 

MT6166 

Camera DSP/MMP 

/ 

All manuals and user guides at all-guides.com

all-guides.com

Содержание IQ4401

Страница 1: ...orn Use only approved components as specified in the parts list Ensure all components modules screws and insulators are correctly re fitted after servicing and alignment Ensure all cables and wires ar...

Страница 2: ...mory Card T CARD 32GB Antenna PIFA antenna Basic Performance Indicators Leakage current 0 2mA Standby current 5 2mA Call current as maximum power GSM900 32 1dbm DCS1800 29 1dbm Board Tri SIM stand by...

Страница 3: ...26 55 08 56 18 56 01 Occupied Bandwidth 5MHz Not exceed 5MHz 4 141 4 163 4 125 4 136 4 144 4 147 ACLR ACLR request 33 dB 5 MHz 43 dB 10 MHz Pass Fail PASS PASS PASS PASS PASS PASS EVM 17 5 Not exceed...

Страница 4: ...rror Frequency error BS 85 Receiver quality BS 85 RBER 2 4 Sensitivity RBER 2 4 Standdard 33 2 23 3 14 3 5 3 5 20 90 23 RX 27 102dBm Less than 102dBm CH1 32 11 22 87 12 87 5 19 0 38 1 35 17 86 25 110...

Страница 5: ...15 19 96 9 99 0 73 0 63 2 39 34 86 25 110 00 CH885 29 20 20 26 10 56 1 06 0 64 2 37 28 57 25 110 00 Items dBm Transimt power Measured paramete rs under the maximum transmit power L5 L10 L15 L19 Avera...

Страница 6: ...ue phase error Frequency error BS 85 Receiver quality BS 85 RBER 2 4 Sensitivity RBER 2 4 Standdard 30 2 20 3 10 3 0 4 5 20 180 23 RX 27 100dBm Less than 100dBm CH512 29 05 19 75 9 42 0 56 0 62 2 31 3...

Страница 7: ...th 3 0 HS A2DP HFP EDRD Camera Rear 5 0MP Camera FF Front camera 0 3MP Size 122 63 12 7mm Battery 2500mAh Fly IQ444 Main function 4 0 480 800 TFT LCD MTK6572 Dual SIM stand by Camera Rear 5 0MP Camera...

Страница 8: ...ultimeter Iron Hot air gun Solder wire soldering paste Computer and software download cable Metal tweezers Screw driver etc Pick Driver Tweezers Wrist groun ding strap Antistatic gloves SW upDownlo ad...

Страница 9: ...FLY SERVICE SUPPORT DISASSEMBLY AND ASSEMBLY All manuals and user guides at all guides com...

Страница 10: ...FLY SERVICE SUPPORT All manuals and user guides at all guides com...

Страница 11: ...FLY SERVICE SUPPORT All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 12: ...FLY SERVICE SUPPORT CIRCUIT INSTRUCTION PCBAA Side All manuals and user guides at all guides com...

Страница 13: ...FLY SERVICE SUPPORT SYSTEM BLOCK DIAGRA UNIT CIRCUIT PRINCIPLE INTRODUCTION Baseband CPU circuit introduction for power supply All manuals and user guides at all guides com...

Страница 14: ...FLY SERVICE SUPPORT MEMORY circuit introduction All manuals and user guides at all guides com...

Страница 15: ...FLY SERVICE SUPPORT CHARGE circuit introduction All manuals and user guides at all guides com...

Страница 16: ...FLY SERVICE SUPPORT MEMORY circuit introduction All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 17: ...FLY SERVICE SUPPORT All manuals and user guides at all guides com...

Страница 18: ...FLY SERVICE SUPPORT MEMORY circuit introduction All manuals and user guides at all guides com...

Страница 19: ...FLY SERVICE SUPPORT BT WIFI GPS FM circuit All manuals and user guides at all guides com...

Страница 20: ...FLY SERVICE SUPPORT Audio circuit 1 SPEAKER 2 All manuals and user guides at all guides com...

Страница 21: ...FLY SERVICE SUPPORT 3 All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 22: ...FLY SERVICE SUPPORT 4 5 All manuals and user guides at all guides com...

Страница 23: ...FLY SERVICE SUPPORT CAMERA circuit All manuals and user guides at all guides com...

Страница 24: ...FLY SERVICE SUPPORT LCD circuit All manuals and user guides at all guides com...

Страница 25: ...FLY SERVICE SUPPORT RF circuit All manuals and user guides at all guides com...

Страница 26: ...FLY SERVICE SUPPORT All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 27: ...FLY SERVICE SUPPORT All manuals and user guides at all guides com...

Страница 28: ...switch on Replace or re solder the BB chip U101 NO YES YES YES End Check power output Centre supply VCORE 1 2V Logical supply VDD 2 8V Memory supply VMEM 1 2V RTC supply RTCVDD 1 8V Replace U101 Upda...

Страница 29: ...ES Check I O connector is OK or not YES Re solder or replace I O connector NO Check applications USB cable software is OK or not Re install USB driver and replace USB cable NO YES Check C310 have VBAT...

Страница 30: ...battery overheat Replace or re solder U301 Remind error during charge Check U303 R329 R324 R331 R15 be normal Check battery connector testing Pin if the bias resis and vatge be normal Change battery...

Страница 31: ...splay or display abnormality after power on Check LCD FPC is OK or not Change or re solder U2 D706 L4102 Check LCD if damage or liquid flow out Change LCD Clean re solder FPC NO YES YES NO All manuals...

Страница 32: ...lograph No sound or noise Remove the speaker and measure with multimeter to see if there s any sound Replace speaker The phone is in Silent mode Check if the volume is in lowest mode Turn up the volum...

Страница 33: ...l with oscillograph under calling mode Receiver is low Check if the receiver is broken or damaged Test if there s sound from receiver with multimeter Replace receiver Replace CPU U101 Set the phone as...

Страница 34: ...st relative items one by one MMI UI Test operations guide Version check ADC Calibration Info Battery Keyboard test LCD test RTC Vibrator Backlight test Main loopback test Camera test Bluetooth test He...

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