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Summary of Contents for Blu Studio 5.0S
- Page 1 BLU Studio 5.0S Service Manual...
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Page 2: Table Of Contents
INTRODUCTION ..................................4 1 .HARDWARE SYSTEM INTRODUCTION ..........................5 1.1 The framework of the hardware system ........................5 1.2 Studio 5.0S Main Components ............................6 2. The detail of system’s modules ............................9 2.1 RF module ..................................9 2.1.1 Transceiver ................................9 2.1.2 GSM signal’s path .............................. - Page 3 ATTENTION Boards, which contain Electrostatic Sensitive Device(ESD), art indicated. Following information is ESD handling: Service personnel should ground themselves by using 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.
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Page 4: Introduction
INTRODUCTION This document, is the maintenance work guide for the BLU Studio 5.0S. The compile objective is to describe the detail theory of the Studio 5.0S and to offer a maintenance guide for the later mass production and after service. -
Page 5: Hardware System Introduction
1 .HARDWARE SYSTEM INTRODUCTION 1.1 The framework of the hardware system The picture1 is the Studio 5.0S framework of hardware system, which is used on TBW5933。 Figure 1 Studio 5.0S framework of hardware system Studio 5.0S has several main modules as below: Baseband module This module include the mobile phone’s core of BB and AP. -
Page 6: Studio 5.0S Main Components
This module include the mobile phone’s audio devices, such as microphone, speaker, Earpiece and headphone. 1.2 Studio 5.0S Main Components Studio 5.0S hardware circuits mainly include main board, sub board of earpiece, main camera’ FPCA, the reset button’s FPC and ANT’s sub board。 Components of main board U101: it’s complex processor which includes AP and BP. - Page 7 U804：DC-DC, Provide the core power for cpu. U203 、U204：load switch ，in charge of memory’s power voltages. X1101： System’s main clock. Provide clock signal on 19.2MHZ when system was working。 U1101：RF’s transceiver。It‘s in charge of system’s RF signal’ tx and rx under ...
- Page 8 U1320：LCD back light led’s driver. U1708：G-sensor. J5401： The connector between mainboard and ant subboard. U1115：USB’ VBUS power signal’s over voltage protection. J5402：T-flash connector. U5403、U5404：SIM card connector. J1504：The connector between mainboard and main camera FPC. ...
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Page 9: The Detail Of System's Modules
2. The detail of system’s modules U101 is AP&BP complex processor，U202 is a complex memory which includes ddr and rom and be shared for AP and BP. Only 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. - Page 10 When GSM’s high and low bands come out from U1101, after a resistor attenuator network, enter the U1207 from PIN3 and PIN4，then they come out again from U1207’s PIN20 after they be amplified in it. Figure 4 GSM high and low bands signals arrive J1203 after be amplified in U1207 GSM high and low bands signals after through the J1203, then through the RF cable and arrive the J1203 which is on antenna subboard, then after through the antenna match network，were radiated by the antenna.
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Page 11: Wcdma Signal's Path
described above can refer to figure 6 and figure 7. Figure 6 GSM’s rx signal’s path from U1207 to the saw filter 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 below:... - Page 12 band 1 ‘s tx saw filter U1205, it arrives band1’s PA ,then enter in diplexerU1210, then enter the switchU1207。The path described above as below: Figure 8 WCDMA band 1’s tx signal from U1101 to U1207 Band1’s signal comes out from U1207’PIN20.The signal ‘s path after U1207 is same as gsm signal path .The detail can refer to figure 4 and figure 5 .
- Page 13 4 and figure 5, then arrival the diplexer. When the BC1 and BC8’s rx signal arrival their diplexer respectively, BC1’s signal comes out from U1210’s PIN1, then enter in U1101 after through C1252. BC8’s signal comes out from U1201’s PIN1and PIN8 which is a differential signal. Then it enter in U1101 after through a match network and C1201 and C1209.The path was described in figure 10 as below.
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Page 14: Pmu
2.2 PMU U802 is the system’s power manager unit， abbreviation PMU. It‘s responsible for system’s battery’s charge and discharge, boot and shutdown, providing all the power needed by system. 2.2.1 The timing of system’s boot 1. When the power key was pressed down, or the test point TP1412 was short to ground, U802’s pin of K11 which was called by name PHONE_ON_N was became low level. -
Page 15: Memory
Figure 12 The power put out from PMU 13. DC-DC，put out the vdd_c2 voltage, the 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 some any problems, the system will not boot up or the system can’t download the... -
Page 16: Audio Module
system’s program code. This part‘s circuit is relatively simple, if the memory has something wrong, we should check the SMT’s problem first .IF not the SMT’s problem, we should check the memory’s supply voltages .Such as the voltage on C210/206/C219/C220/C221 should be 1.8V，... -
Page 17: Earpiece Circuit
Figure 15 microphone’s differential signal through the filter network 2.4.2 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 from U101, then be amplified by the audio PA U501, at last arrival the speaker. -
Page 18: Audio Jack Circuit
17. Speaker circuit After be amplified, the speaker’s signal arrival the pads on antenna sub board after through the FPC and the connector J5401. 2.4.4 Audio Jack circuit 1. Earpiece detect circuit Before the earpiece inserted, the voltage HS_DETECT_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. -
Page 19: Other Peripherals
Figure 18 audio jack circuit 2.5 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 with U101 through the interface IIC. -
Page 20: Camera Interface Circuit
Figure 20 TP interface circuit 2.5.3 Camera interface circuit TBW5933 has a front Camera (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 J610. Figure 21 main camera circuit 2. -
Page 21: Light Sensor Circuit
2.5.4 Light sensor circuit Light sensor communicates with U101 through the IIC interface. Figure 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 module circuit BT and WIFI module was made up of U1602、... - Page 22 Figure 25 BT module interface circuit Figure 26 Supply power voltage of BT Figure 27 the switch module of WIFI and BT module...
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Page 23: Gps
Figure 28 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 in U1101... -
Page 24: Lcd
2.5.8 LCD LCD module communicates with cpu through the MIPI_DSI interface circuit. The device U1701 is the common filter 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 the voltage on R1326, or check the D1320 and L1320 whether or not is burn out. -
Page 25: Peripheral Interface Circuit
2.6 Peripheral interface circuit 2.6.1 USB interface USB interface is on the 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 is simple, if having something wrong, please refer to the figure 35 and figure 36. - Page 26 Figure 35 Dual SIM card interface circuit Figure 36 T-flash card interface circuit...
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