Blu STUDIO 5.0 S Service Manual Download | Manualshive

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BLU Studio 5.0S

Service Manual

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Summary of Contents for STUDIO 5.0 S

Page 1: ...1 BLU Studio 5 0S Service Manual...

Page 2: ...2 The voltages put out from PMU 14 2 3 Memory 15 2 4 Audio module 16 2 4 1 Microphone circuit 16 2 4 2 Earpiece circuit 17 2 4 3 Speaker circuit 17 2 4 4 Audio Jack circuit 18 2 5 Other peripherals 1...

Page 3: ...a wrist strap when exchange system boards When repairs are made to a system board they should spread the floor with anti static mat which is also grounded Use a suitable grounded soldering iron Keep...

Page 4: ...tail theory of the Studio 5 0S and to offer a maintenance guide for the later mass production and after service The readers of the document should be the debug worker of SMT and after service It will...

Page 5: ...Studio 5 0S has several main modules as below 1 Baseband module This module include the mobile phone s core of BB and AP Such as system s processor memory power manager unit and so on 2 Radio Frequen...

Page 6: ...n camera FPCA the reset button s FPC and ANT s sub board 1 Components of main board U101 it s complex processor which includes AP and BP It mainly was used to control the BB s RF module audio and othe...

Page 7: ...cies And on the time it can amplify the qual band GSM radio signal U1206 The saw filter on the rx path of GSM1800 and GSM1900 U5605 The saw filter on the rx path of GSM850 and EGSM900 U1205 The saw fi...

Page 8: ...board and main camera FPC J5732 The connector between mainboard and front camera FPC J1401 JTAG s connector U1403 U1404 The common mode filter of front camera s MIPI_CSI interface U1405 U1406 U1407 Th...

Page 9: ...nly they all work normally the system can boot normally 2 1 RF module 2 1 1 Transceiver U1101 is the transceiver which supports GSM and WCDMA mode Figure 2 RF transceiver 2 1 2 GSM signal s path 1 Tx...

Page 10: ...igure 5 GSM high and low bands signals arrive antenna subboard through the RF cable 2 Rx path GSM s signal was received by antenna and reach the J1203 on main board after through the path on Figure 5...

Page 11: ...r U5605 and U1206 Figure 7 GSM s rx signal s path from he saw filter U5605 and U1206 to U1101 2 1 3 WCDMA signal s path STBW5933 supports the wcdma mode on band1 and band 8 They will be described as b...

Page 12: ...r circuit shared by wcdma s band1 and band8 which is used to detect the tx power by U1101 2 wcdma band 8 tx signal s path Band 8 s tx path is same as band 1 The tx signal comes from U1101 and then thr...

Page 13: ...through a match network and C1201 and C1209 The path was described in figure 10 as below Figure 10 WCDMA s rx signal path from diplexer to U1101 After BC1 s signal entered in U1101 in order to improve...

Page 14: ...the pinN11 to low and turn on the switch of system s power MOSFET U803 3 PMU puts out all the voltage according to the boot timing 4 PMU pulls the pin PON_RESET_N to high level and reset the U101 5 Af...

Page 15: ...he core voltage of cpu After the boot end all the voltage from PMU and the clock signal should keep stable 2 3 Memory SDRAM NAND Flash Memory save the program code and run the program If they have som...

Page 16: ...should be a clock signal through the resistor R212 Memory module s supply voltage as below figure 14 Figure 13 memory s supply voltage 2 4 Audio module 2 4 1 Microphone circuit U101 can provide the a...

Page 17: ...Earpiece circuit Earpiece s P M signal arrival the pads through the filter network as below after they come out from U101 Figure 16 Earpiece s circuit 2 4 3 Speaker circuit Speaker s signal come out...

Page 18: ...T_N is high level when the earpiece inserted PMIC_HPH_LS will be low level then the CPU detects the event that having a earpiece be inserted 2 Headphone s microphone circuit MB_IN signal is used to de...

Page 19: ...Other peripherals 2 5 1 Vibrator VBAT is the anode VIB_DRV_N puts out the low level to drive the vibrator to shock Figure 19 vibrator s driver circuit 2 5 2 Touch panel circuit The TP communicates wi...

Page 20: ...era 0 3m and a main camera 5M 1 Main camera circuit Main Camera is welded on camera FPC and the peripherals are welded on main board The camera and main board connect together through the connector J6...

Page 21: ...23 Light sensor circuit Light sensor s failure often was caused by sealed not well or other devices shared IIC have something wrong 2 5 5 G sensor circuit Figure 24 g sensor circuit 2 5 6 BT WIFI modu...

Page 22: ...1 Figure 25 BT module interface circuit Figure 26 Supply power voltage of BT Figure 27 the switch module of WIFI and BT module...

Page 23: ...8 WIFI module circuit 2 5 7 GPS The GPS signal through the saw filter U1801 low noise amplifier U1802 saw filter U1803 then arrivals U1101 Figure 29 GPS front end circuit Figure 30 GPS s signal enters...

Page 24: ...ilter for data and clock signal of MIPI_DSI interface Figure 31 LCD s interface circuit The following figure 31 is the back light driver circuit If the back light led has some problems please check th...

Page 25: ...antenna sub board the U1115 is the OVP ic for USB s Ubus voltage Figure 33 USB s OVP circuit 2 6 2 Volume key Figure 34 volume key and key circuit 2 6 3 T flash card and USIM card interface This part...

Page 26: ...1 Figure 35 Dual SIM card interface circuit Figure 36 T flash card interface circuit...

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