Blu LIFE PLAY MINI Service Manual Download Page 13 | Manualshive

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3.6 Earphone fail

No sound in

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

Y

N

Hot or
change
U1420

OK

Y

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Summary of Contents for LIFE PLAY MINI

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

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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