mediacom g501 service manual
DESCRIPTION
Mediacom G501 Service Manual for repair - Riparazione Mediacom G501TRANSCRIPT
N501 C t S iN501 Customer Service Manual
Ⅰ. Mobile phone Introduction1. Features Android4.4 Capacitive Touch screen
/ / / / FM radio /Bluetooth/WIFI/GPS/
2. Product CharacteristicsPl f MTK6582M Platform :MTK6582M
MCP:4GB ROM+512MB RAM (Option:8GB+1GB)
Operate Frequency: GSM 850/900/1800/1900MHZ & WCDMA 900/2100MHZ or 850/1900/2100 or 850/1700/1900850/1900/2100 or 850/1700/1900
Dual SIM :Dual SIM dual standby Display: 5.0 inch FWVGA IPS 480*854 Camera : Back 5.0MP +Front 2.0MPCamera : Back 5.0MP Front 2.0MP Extend T-Flash Card support
3 Specification3. Specification
Size: 142.9*72.6*9mm (L*W*H)
Color: Black
Keypad :NO
Side Key:2 keys (volume key/ power key)
Antenna: Internal RF&BT,WIF&GPS; External FM, ;
Earphone:3.5mm jack
Battery:2200mAh
USB t Mi 5 i USB USB port: Micro 5pin USB
Electroacoustic part:1 mic.,1 spk., 1 vib. 1 Receiver (option: Piezo)
Ⅱ Examination functionⅡ. Examination function
1、IMEI examination order
Inputs the *#06# instruction to check the IMEI NO. inside mobile phone
2、Testing order
Inputs the *983*0# to test all normal functions
3、Download cable
Just use the usb cable to download sw
Ⅲ.Testing and Repair ToolsⅢ.Testing and Repair Tools CMU200 or 8960
DC POWER SUPPLYDC POWER SUPPLY
Oscillograph
Hot gun
Electric iron
Stroboscope
Screwdriver(electromotion) Screwdriver(electromotion)
UP-1024 super speed universal programmer
Disassemble toolsDisassemble tools
Multimeter
CMU200 or 8960 DC Power Supply OscillographCMU200 or 8960 DC Power Supply Oscillograph
Hot gun Electric iron Stroboscope
Screwdriver(electromotion)UP-1024 super speed universal programmer
MultimeterDisassemble tools Disassemble tools MultimeterDisassemble tools Disassemble tools
Glove Soldering tinFabric
Alcohol bottle
Brush fixed clampBrush
Ⅳ.Circuit Chipset/Instructions
CPU:MT6582M (Four Cortex : 1.3Ghz)
MCP:4GB ROM+512MB RAM(option:8GB +1GB )
Power management: MT6323Power management: MT6323
Multimedia:MT6627(WLAN+GPS+BT+FM 4 in 1 IC)
/RF:3G/2G quad-band transceiver MT6166+Power Amplifier SKY77590+SAW +SMD Crystal
TOPGSM PA U401
Battery connector XJ703
Earphone connector
USB connector XJ701
Back camera connector XJ903
CPU U501 MT6582
P U601
Front camera connector XJ908
XJ711
MCP U602
Power manage U601 MT6323
BOT
SIM 1 connector XJ707
SIM 2
TP connector XJ1006
connector XJ708
TF connector XJ706
LCD connector XJ902XJ902
MT6323 managementdiagram circuit:
Charger circuit:Charger circuit:
SIM card circuitSIM card circuit
TF-Flash card circuitTF-Flash card circuit
MIC circuit
Earphone connector circuit
Speaker circuitSpeaker circuit
Battery connector
Camera connector circuit
LCD connector circuit
TP circuit
G-SENSOR circuit
MT6627 circuit(WLAN+GPS+BT+FM 4 in 1 IC)
Ⅵ、Troubleshooting of the problem:Ⅵ、Troubleshooting of the problem:1.Cann’t download software repair guidance2 No power on repair guidance2. No power on repair guidance3. Display Problem (blank display ,white display) repair guidance4. No ring repair guidance5 Audio problem repair guidance5. Audio problem repair guidance6. Camera problem repair guidance7. TF card problem repair guidance8 SIM d bl i id8. SIM card problem repair guidance9. Can’t charge repair guidance10. No vibration repair guidance11 TP bl i id11. TP problem repair guidance12. MT6627 (WIFI\GPS) repair guidance13. FM Can not search signal14 N i l14. No signal
Cann’t download software repair guidance
Cann’t download
YES
Check the files to select from software package Re-download
NO
Y
NO
Check VBAT、VCHG voltage Solder or replace Power management MT6323
NO
Y
NO
Check USB connector if have short circuit or open
circuitSolder or replace usb connector
Y
NOCheck clock frequency32.768kHz (700mV )or
system clock 26MHz(600mV)
Solder or replaceY
NO
Check CPU(MT6582) and circuits round Solder or replaceY
No power on repair guidance
No power on repair guidance
Y
Check the power button,Re-download software
NN
Check if have any creepage,If VBAT、VCHG is short circuit,
If have ESD was damageSolder or replace
N
Y
N
Check if have KEYON signal after press power
key
Solder or replace Power management MT6323Y
yN
Check clock frequency32.768kHz( 700mV)
System clock 26MHz (600mV)Solder or replace
Y
NN
Check CPU( MT6582)Or circuit round Solder or replace
Y
Display Problem (blank display ,white display) repair guidance
Display Problem (blank display ,white display)
Y
Check LCD is ok or not Replace LCD to test
N
Y
N
Check LCD Connector if have any short solder etc Solder or replace XJ902
N
Y
N
Check Backlight circuit U901 Solder or replace U901Y
N
check MT6582 Solder or replaceY
No ring repair guidance
No ring or voice
Y
Check speaker if have assemble ok Repeat fixed
N
Y
N
Check speaker if have damage Replace to test
N
Y
N
Check speaker round circuit Solder or replace Y
N
Solder/replace
YCheck power IC MT6323
Check CPU MT6582 Solder or replace
NY
receiver problem repair guidance
Audio problem (Cann’t got voice when making call)
Y
Check Receiver FPC if have connect ok Repeat fixed
N
Y
N
Check Receiver damage or not ReplaceN
NN
Check receiver round circuit Solder or replaceY
Check CPU MT6582 Solder or replace
N
Y
Camera problem repair guidance
Cann’t take picture or mistiness
Y
Check camera if have damage Replace to test
N
Y
N
Check camera connector XJ903/XJ908 Solder or replaceY
NN
Check CPU MT6582 Solder or replaceY
TF card problem repair guidance
TF card not be identify
Y
Check TF connector is damage or not Solder or replace XJ706
N
Y
N
Check data \clock\power to TF connector Solder or replaceY
NN
Check CPU MT6582 Solder or replaceY
SIM card problem repair guidance
SIM card not be identify
Check Sim connector if have damage Solder or replace XJ707/XJ708
YY
Check Sim connector if have damage Solder or replace XJ707/XJ708
N
Ch k SIM d i i if h l MT6323 S ld lY
Check SIM card circuit,if have power supply MT6323 Solder or replace
N
Check and replace MT6582
Can’t charge repair guidance
Can’t charge
Y
Check battery connector and USB connector Solder or replace
N
Y
N
Check charge circuit Solder or replaceY
Solder or replaceY
Check circuit: Power supply MT6323
Solder or replaceCheck CPU MT6582
NY
p
No vibration repair guidance
No vibration
Y
Check assembly are in good condition Solder or replace
N
Y
N
Check whether the motor cable ifdisconnection or not Solder or replace
Y
NN
Check power supply MT6323 Solder or replaceY
TP problem repair guidance
No TP function
Y
Check TP FPC if have connecting Repeat fixed
N
Y
N
Check TP if have damage ReplaceY
NN
Solder or replaceY
Check connector circuit XJ1006
Check CPU MT6582 Solder or replaceY
N
MT6627 (WIFI\GPS) repair guidance
MT6627 Chi i i WIFI\BT\FM i iMT6627 Chip inteqration WIFI\BT\FM circuit。
GPS/WIFI can’t work
Check BT and WIFI address Write the address
YY
N
Check the antenna contacts are in good condition replaceY
N
Check chip(MT6627) Solder or replaceY
FM Can not search signal
Y
Check antenna connect circuit Solder
N
Y
N
Check earphone or earphone connector Solder or replaceY
N
Check MT6627 Solder or replaceY
2.RF circuit
No signal
Check whether the antenna connection is good replaceY
Check RF PA Solder or replace
NO TX
Y
N
Check circuit round Solder or replaceY
N
Check Filter circuit,26M OSC circuit Solder or replaceY
Solder or replace
N
Y
Check RF transceiver MT6166 Solder or replace
N
Check CPU MT6582
Ⅴ Di blⅤ. Disassembly1 Open the battery cover as below1.Open the battery cover as below
Camera lens
Battery cover
2. Take out cover of bottom as below2. Take out cover of bottom as below
Battery cover
3. Take out 12 screws with Screwdriver as below
4 S t f t d b l4. Separate front case and rear case as below:
Rear caseVolume key
Power key
5 T k t M i PCBA f f t5. Take out Main PCBA from front case
1) Remove the fixed 4PCS screws
2)Disassembly components from main PCBA) y p
Speaker
Motor
TP FPC
Keypad FPC
LCD FPC
MicrophoneMicrophone
3).Take out Main PCBA from front case
Main PCBA
Front case
6. Remove those components(speaker, motor, microphone, keypad FPC) from main PCBA
speaker
motorKeypad FPC
microphone
Remove front camera ,back camera from main PCBA
Back camera Front camera
7. Disassembly components distribution as below
i
Rear caseFront case
receiver
Main PCBA
Touch panel
Mic
Battery cover Back camera
Front camera Power key FPC
motor
speakerVolume keyPower key
8. Disassemly TP&LCDDisassembly the mobile phone to front housing subassembly only (just have LCD/touch lens/front housing) then along the round(black area) on Touch lenshousing), then along the round(black area) on Touch lens to heat even about 20seconds with Hot Gun as below pic
9.once finished to heat up by Gun. take the Guitar p yplectrum insert the gap between Touch lens and front housing (take care :the Guitar plectrum didn’t be insert too deep ,or will hurt the LCD). then prize the touch lens along the round as below picg p
1 2
3 4
THE ENDTHE END