Chapter5
54
TROUBLE SHOOTING
Test flow chart of test SIM card
Could not read
SIM
Check if points
of SIM card are
OK
Clean or
replace
SIM
socket
NO
End
OK
Check if SIM card
Is invalid
Yes
Replace
SIM card
Connect to the voltage
regulator and check if the
current is OK
Power may be damaged.
Test if the voltage PIN of
SIM card isn’t 2.8V and
if the third, forth, fifth
pins have pulse voltage
YES
MT6739 may have
fault
YES
NO
NO
NO
Replace MT6739
YES
Summary of Contents for VIVO ONE
Page 1: ...BLU Model VIVO ONE VIVO ONE SERVICE MANUAL ASSEMBLY DISASSEMBLY 1 ...
Page 2: ...Chapter 1 EXPLODED VIEW AND COMPONENT DISPOSAL EXPLODED DIAGRAM 2 ...
Page 14: ...DISASSEMBLY AND ASSEMBLY SERVICE TOOLS 14 ...
Page 16: ...Chapter 2 SYSTEM BLOCK DIAGRAM 16 ...
Page 17: ...Chapter 3 INSTRUCTION OF THE UNIT CIRCUIT Circuit instruction of CPU 22 ...
Page 18: ...23 ...
Page 19: ...24 ...
Page 20: ...25 ...
Page 21: ...26 ...
Page 22: ...27 ...
Page 23: ...28 ...
Page 24: ...CPU input of the keypad 29 ...
Page 25: ...The circuit of SIM1 SIM2 T FLASH 30 ...
Page 26: ...EMMC MCP 31 ...
Page 27: ...Bluetooth WIFI GPS FM 32 ...
Page 28: ...Power supply port 33 ...
Page 29: ...29 ...
Page 30: ...30 ...
Page 31: ...31 ...
Page 32: ...Battery connector 37 ...
Page 33: ...Charger Circuit 38 ...
Page 34: ...I O connector 39 ...
Page 35: ...40 RF TX RX ...
Page 36: ...41 ...
Page 37: ...42 ...
Page 38: ...43 REC MIC ...
Page 39: ...44 HEADSET REC MIC ...
Page 40: ...LCD POWER LCD BACKLIGHT 45 ...
Page 41: ...Rear Camera Connector 46 ...
Page 42: ...47 Front Camera Connector ...
Page 43: ...48 Flash LED ...
Page 44: ...49 ALPS G SENSOR ...
Page 45: ...50 Finger print ...
Page 46: ...Chapter4 PCB Layout chart PCB layout SIDE A 51 ...
Page 47: ...PCB layout SIDE B 52 ...
Page 48: ...53 ...