Blu LIFE PLAY MINI Скачать руководство пользователя

Страница: 14 / 18

3.7 Vibrator fail

3.8 Side key fail

Motor doesn’t work

Supply 3.3V for
motor, test motor
can work or not

Change a
new Motor

Check VIBR_PMU ok
or not, Check SUB
PCB reverses or not

Hot U1420 or
Change a new one

Change uncorrected
component or sub
PCB

Side key no function

Is key switch soldering
OK?

Re-solder or
change new
one

Is R1435, R1469 and
R710, NC or not?

Check
U200

Solder 1K resistance

Re-sold or change
U200

Содержание LIFE PLAY MINI

Страница 1: ...BLU SPORT 4 5 SERVICE MANUAL...

Страница 2: ...uit 6 3 Trouble Shooting 8 3 1 Fail to startup power on 8 3 2 Fail to charge 9 3 3 Fail to display 10 3 4 Fail to call 11 3 5 Speaker no sound 12 3 6 Earphone fail 13 3 7 Vibrator fail 14 3 8 Side key...

Страница 3: ...electrostatic sensitive components on the handset 4 If disassembling operation is necessary for repairing comply with mechanical structure disassembling work instruction Otherwise disassembling opera...

Страница 4: ...2 Technology summarize 2 1 Description of main board component map...

Страница 5: ...hree parts as below Digital baseband function Memory LCM GPIO interface Keypad interface etc Analog baseband function AUDIO including MIC Receiver Speaker Camera Video Ambient light and Proximity sens...

Страница 6: ...aptive operating voltage from 1 05V to 1 26V MD MCU subsystem 1 ARM Cortex R4 processor with maximum 491 5MHz operation frequency 2 32KB I cache 16KB D cache 3 256KB TCM tightly coupled memory 4 DSP f...

Страница 7: ...mable slew rate for memory controller s IO pads 7 Advanced bandwidth arbitration control Operating conditions 1 Core voltage 1 15V 2 Processor DVFS voltage 1 15V 1 26V Typ 1 15V sleep mode 1 05V 3 Pro...

Страница 8: ...aintain connect the power on test point to GND then check below voltage in sequence BBWAKEUP VRTC VPROC VCORE VSRAM VSYS VIO18 VEMC3V3 VA28 VIO28 VM VUSB VMC VMCH VTCXO RESETB ok not Fourth if the cur...

Страница 9: ...k T2020 whether reverse check C2020 resistance is very big or not check B2020 B2021 solder ok or not Fourth check U1420 solder ok or not re hot U1420 or change a new one No charge Check battery can po...

Страница 10: ...change a new module check whether can display normal Third check L1850 D1850 U1850 solder ok or not Fourth use oscilloscope to test LCD_BACKLIGHT_EN check it whether high if not check U200 solder ok...

Страница 11: ...f all ok change a new receiver also fail check CPU re hot U200 or change a new one Call 112 if can hear voice it may microphone problem change a new microphone check C1633 C1634 C1635 B1642 B1643 ok o...

Страница 12: ...eck B1220 B1221 T1220 T1221 solder ok or not Third check U1420 re hot or change a new one No sound Is speaker OK Replace Speaker Are B1220 B1221 NC or not Check T1220 T1221 ok or not Check U1420 ADD B...

Страница 13: ...earphone Is earphone connector OK Replace earphone Is J1620 soldering well Are All TVS right direction Related R C right Re solder J1620 Re solder uncorrected TVS Re solder uncorrected R C Y N N N Y...

Страница 14: ...Motor Check VIBR_PMU ok or not Check SUB PCB reverses or not Hot U1420 or Change a new one Change uncorrected component or sub PCB OK Y N N Y Side key no function Is key switch soldering OK Re solder...

Страница 15: ...good SIM is damaged Replace it Change a new one Check if VSIM1 VSIM2 are OK Change U1420 N Y N N Y Y Y Check each signal on SIM is OK Hot U1420 or change a new one N N Fail to flash IMEI Could it powe...

Страница 16: ...M_RST CAM_MCLK CAM_PCLK MIPI_DATA and MIPI_CLK If signals abnormal check U1200 re hot or change a new one Camera fail Is camera connector soldering well Re solder or change new one Check camera ok or...

Страница 17: ...r normal Fourth test related signals such as MCCK MCCM0 MCDA0 MCDA1 MCDA3 if abnormal check U200 re hot or change a new one T F Card is not identified Change a new TF card to test T F card is damaged...

Страница 18: ...4 BGA related GND or no function pad Red no function pad White GND pad 4 1 CPU and memory pin map 4 2 PMU pin map...