25
/
43
CANNOT POWER ON-LARGE CURRENT
Check if the phone
leakage (current 0mA is
normal)
Check and replace
RF IC, BT IC, WiFi
IC, FM IC, CPU
END
Check and
replace RF PA,
Audio PA, PM IC
Check if the
capacitance,
varistor, LDO tube
leakage
Use the touch
method to check and
replace the heat
spare parts
Make the phone connect the power
supply and then press power key
find large current make the phone
heat
Summary of Contents for STUDIO 5.0 HD LTE
Page 1: ...1 43 BLU STUDIO 5 0 HD Service Manual...
Page 8: ...8 43 Finished Remove the LCD 19...
Page 12: ...12 43 Finished Fasten the 10 screws 19 Install the battery cover 20...
Page 15: ...15 43 Side A layout Side B layout...
Page 17: ...17 43 5 2 Baseband CPU circuit introduction for power supply CPU power supply part...
Page 18: ...18 43 5 3 Introduction for baseband chip CPU signal output part circuit...
Page 22: ...22 43 SKY7775XX POWER AMPLIFIER MODULE FOR CDMA WCDMA HSDPA HSUPA HSPA LTE DAND...
Page 24: ...24 43 MT6323 power manage supply output...
Page 33: ...33 43 Speaker circuit To speaker From power IC Audio detector Audio PA IC...
