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FLY IQ4401 Service Manual
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FLY IQ4401 Service Manual

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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.
Base Chip Set
Transceiver
Camera DSP/MMP
FLY SERVICE SUPPORT
Fly IQ4401 Service Manual
Product Hardware Introduction
BB
PMIC
MT6572A/X
MT6323
MT6166
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Summary of Contents for FLY IQ4401

  • Page 1 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.
  • Page 2 FLY SERVICE SUPPORT GSM PA：VC7584； WCDMA PA：VC5318 RFPA MT6627N MT6627N Audio CODEC&PA SD7DP24C-4G, ， SANDISK Memory IC:FT6206 TP IC 4.0” ，IC: ILI9806E Backlight Driver Peripheral Rear camera:2.0 IC：SP2529 Front camera:0.3IC：SP0A19 CAMERA Configuration T-CARD:32GB Memory Card PIFA antenna Antenna 0.2mA Leakage current 5.2mA...
  • Page 3 FLY SERVICE SUPPORT WCDMA 射频参数 测试信道 Testing channel 测试项目 Band I Band VIII 参考标准 Testing Downlink Downlink Downlink Downlink Downlink Downlink Reference Standard items 10562 10700 10838 2937 3012 3088 Uplink Uplink Uplink Uplink Uplink Uplink 9612 9750 9888 2712...
  • Page 4 FLY SERVICE SUPPORT 最大输入电 平 Maximum BER < 0.001 when Îor = -25 dBm -14.4 -14.4 -14.4 Input Levele) 上行内环功 控 Uplink Inner Loop Pass/Fail PASS PASS PASS PASS PASS PASS Power Control GSM 射频参数 最大发射 功率发射 时参数测 量 发射功率...
  • Page 5 FLY SERVICE SUPPORT paramete rs under maximum transmit power 峰值相 平均相位 接收质量 位误差 灵敏度 RBER＜ 误差 频率误差 (BS=-85) Peak 2.4％ Average Frequency Receiver value Sensitivity Phase error quality phase RBER＜2.4％ error (BS=-85) error 优于 标准 －100dBm 30±2 20±3 10±3 0±4 <5º...
  • Page 6 FLY SERVICE SUPPORT CH251 32.10 22.93 13.00 5.04 0.30 1.12 10.05 -111 最大发射 功率发射 时参数测 量 发射功率 Measured 项目 (dBm) paramete Items Transimt rs under power maximum transmit power 峰值相 平均相位 接收质量 位误差 灵敏度 RBER＜ 误差 频率误差 (BS=-85) Peak 2.4％...
  • Page 7 FLY SERVICE SUPPORT INTRODUCTION Fly IQ444 Main function * 4.0, 480*800 TFT LCD *MTK6572 * Dual SIM stand by *Camera： Rear 5.0MP Camera FF Front camera:0.3MP *BT, FM *Multimedia player *T-Flash Up to 32 GB *MP3,AAC, MIDI ,WAV *Normal keypad Spec：...

  • Page 8: Service Tools

    FLY SERVICE SUPPORT SERVICE TOOLS Iron Hot air gun Voltage regulator Multimeter Solder wire, soldering paste Tweezers Driver upDownlo ad cable Wrist groun ding strap Pick Antistatic gloves Metal tweezers, Screw driver etc Computer and software download cable...

  • Page 9: Disassembly And Assembly

    FLY SERVICE SUPPORT DISASSEMBLY AND ASSEMBLY...
  • Page 10 FLY SERVICE SUPPORT...
  • Page 11 FLY SERVICE SUPPORT...
  • Page 12 FLY SERVICE SUPPORT CIRCUIT INSTRUCTION PCBA A-Side...
  • Page 13 FLY SERVICE SUPPORT SYSTEM BLOCK DIAGRA UNIT CIRCUIT PRINCIPLE INTRODUCTION Baseband CPU circuit introduction for power supply...
  • Page 14 FLY SERVICE SUPPORT MEMORY circuit introduction...
  • Page 15 FLY SERVICE SUPPORT CHARGE circuit introduction...
  • Page 16 FLY SERVICE SUPPORT MEMORY circuit introduction...
  • Page 17 FLY SERVICE SUPPORT...
  • Page 18 FLY SERVICE SUPPORT MEMORY circuit introduction...
  • Page 19 FLY SERVICE SUPPORT BT/WIFI//GPS/FM circuit...
  • Page 20 FLY SERVICE SUPPORT Audio circuit 1,SPEAKER...
  • Page 21 FLY SERVICE SUPPORT...
  • Page 22 FLY SERVICE SUPPORT...

  • Page 23: Camera Circuit

    FLY SERVICE SUPPORT CAMERA circuit...

  • Page 24: Lcd Circuit

    FLY SERVICE SUPPORT LCD circuit...
  • Page 25 FLY SERVICE SUPPORT RF circuit...
  • Page 26 FLY SERVICE SUPPORT...
  • Page 27 FLY SERVICE SUPPORT...

  • Page 28: Troubleshooting Guide

    FLY SERVICE SUPPORT TROUBLE SHOOTING GUIDE Cannot switch on Phone connect current is about 50-100mA and cannot switch on Update software Check and replace Check power output： I/O connector Centre supply VCORE 1.2V Logical supply VDD 2.8V Memory supply VMEM 1.2V Replace or RTC supply: RTCVDD 1.8V...
  • Page 29 FLY SERVICE SUPPORT cannot download cannot download Check phone Check battery is OK or not switch on or not Check applications, Re-install USB driver and USB cable, software is replace USB cable OK or not Re-solder or replace I/O Check I/O connector is...
  • Page 30 FLY SERVICE SUPPORT Does not charge Remind error during charge Remind: “fault connection” “battery overheat” Change battery Re-flash SW Check battery connector testing Pin, if the bias resis and vatge be normal. Check U303,R329,R324,R331,R15 be Replace normal. re-solder Replace or re-solder...
  • Page 31 FLY SERVICE SUPPORT No display or display abnormality No display or display abnormality after power on Check LCD if damage or Change LCD liquid flow out Check LCD FPC is OK Clean/re-solder or not Change or re-solder U2,D706,L4102...
  • Page 32 FLY SERVICE SUPPORT No/Low sound from Speaker No sound or noise Remove the speaker and check if there’s the ring is measure with multimeter to normal see if there’s any sound. Set the phone as The phone is in Replace speaker.
  • Page 33 FLY SERVICE SUPPORT Receiver low voice or no voice Receiver is low. Set the phone as handsfree mode Check if the receiver Replace the is broken or damaged receiver. Test if there’s sound from Replace receiver receiver with multimeter Measure the signal...
  • Page 34 FLY SERVICE SUPPORT CIT TEST 1. Insert T-Flash card and SIM card. After power-on, press *#37*# to enter factory mode for CIT test. 2. Choose Full test menu. To do full test. 3. Test relative items one by one: MMI UI-Test operations guide...