Saturday, 21 September 2013

How to Hard Reset Sony Ericsson Xperia X10

Today im gona share how to hard reset your Sony Ericsson Xperia X10, this just can be apply to Xperia X10, All you need  is a SEUS update.

Then What is SEUS? SEUS (Sony Ericsson Update Service) is program which helps you to connect to the main Sony Ericsson Web Site easily and upgrade your phone with the latest software available for it. It can be downloaded from the main SE web page. Visit this official webpage for sony ericsson handsets support and follow the instructions there.

For soft reset follow the instruction below: 1 From the Xperia 10 Home screen, tap the applications bar. 2 Tap Settings > SD card & phone storage > Factory data reset > Reset phone. 3 Enter your screen unlock pattern. 4 Tap Erase everything.
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Sunday, 6 January 2013


DIAGRAM SMALL 6WATT POWER AMPLIFIERThe TA7222 is a power amplifier for consumer application.

It is designed for high power, low distortion and low noise.

It also contains various kind of protectors.

It is suitable for car – audio power amplifier with high performance.

Operating Supply Voltage Range Vcc = 9~18volt

High power is 6Watt




R1=27 kO










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PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by changing the value of the external capacitor. Pin assignments and application circuits are optimized for easy PCB Layout and cost saving advantages.

CMOS Technology

2-Channel Input

3-Channel Output (Including 1 stereo Output and Subwoofer Output)

Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%)

High S/N Ratio (S/N Ratio <-87dB, A-weighting)

Least External Components

Adjustment of Frequency response by changing the value of the external component

Single Power Supply: 3 to 8.5 Volts

Available in 20 pins, DIP or SO Package



2------ R1,R2--------------  --------- 10k / 1% / metal film


2------ C9,C10-------------    -------- 4.7nF / 63V / polyester / raster R. 5mm

3------ C1,C7,C8--------   ----------- 47nF / 63V / polyester / raster R. 5mm

1------ C16----------------   --------- 100nF / 63V / polyester / raster R. 5mm

1------ C13-----------------   -------- 220nF / 63V / polyester / raster R. 5mm

2------ C3,C4-------------    --------- 2.2uF / 50V / polyester / raster R. 5mm

5------ C5,C6,C11,C14,C15--- 3.3uF / 100V / electrolytic / vertical / raster R. 5mm

1------ C12-------------------------- 10uF / 35V / 105°C / electrolytic / vertical / raster R. 5mm

1------ C17----------------- --------- 100uF / 16V / 105°C / electrolytic / vertical / raster R. 5mm

1------ C2---------------------------- 470uF / 35V / electrolytic / vertical / raster R. 5mm

Integrated Circuits

1------ U1---------------------------- 78L08 / +8V voltage regulator / TO-92

1-------U2---------------------------- PT2350 / stereo tone control, subwoofer low pass filter IC / DIP20


1------ D1---------------------------- 1N4153


1------ J1----------------------------- 2 pole wire connector (terminal block) to pcb / raster r. 5 mm / hight 9.7 mm

1------ P1----------------- ----------- 10k log stereo potentiometer / 6 mm saft

2------ P2,P3------------------------ 100k lin stereo potentiometer / 6 mm saft

5------ J2 to J5---------------------- RCA female to PCB, straight, Hosiden any colour

NOTICE ABOUT J2 to J18 !!! if you make one stereo input device you need 5 pcs of RCA female as listed in parts list

If you make 2 x 6 input device, you need total quantity of 15 pcs RCA female and also 2 x 6 changeover switch.

Code of J2 to J18 RCA female to PCB, straight, Hosiden, any colour

SW1 2 x 6 changeover High quality DIP rotary switch to PCB 2 x 6, Alcos witch DRS 2-6, 3.2mm saft

Frequency response of tone control unit is flat between 20 Hz … 20 kHz when treble and bass pots are in middle.

Overall gain is approx. 6 dB when treble and bass pots are in middle.

Treble and bass tone control range is approx. 10 dB (50Hz / 4 kHz) with given component values.

Subwoofer cut off frequency can be adjusted by bass potentiometer… with component values as listed above it is as follows : bass pot in minimum (left) -3dB point, 240 Hz / -12dB 450 Hz, bass pot (middle) -3dB point 100 Hz /-12dB 200 Hz, bass pot maximum (right) -3dB point 60 Hz / -12dB 120 Hz.

Distortion was < 0.1 % when input level was < 0.3V rms.

There is no balance adjustment potentiometer in this application, if you need balance, you must add it separately in this device.
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Actrk 600W schematic

Actrk 600W schematicTwo versions of a robust module capable of delivering high powwer for extended periods. The Actrk400 uses 6 n-channel Mosfets in the output stage to deliver around 400 watts into 4 ohms while the Actrk600 uses 12 n-channel Mosfets in the output stage to deliver power in excess of 600 watts into 4 ohms. One constructor has achieved almost 900 watts with the Actrk600 layout using 12 IRFP460 Mosfets.
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2x15w stereo power amplifier circuits based TDA1521

2x15w stereo power amplifier circuits based TDA1521
With remarkable features make it the true Hi-Fi amplifier.

Using only active component (the right and left channel) Philips TDA1521 monolithic integrated circuit, which contains a double line-end audio amplifier completely independent, each capable of providing from 10 to 12 W to the load 8 ohm or 15 W into 4 ohms (30 W music). Voltage gains of the amplifier is fixed at 30 dB.

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Output Power : 200Watts
Load Resistance : 8ohms
Input impedance : 55K
Maximum supply voltage : (+95v)-0-(-95v)
Recommended supply voltage : (+66v)-0-(-66v)

This complete high quality, low noise mono audio power amplifier is based around the Hybrid Integrated Circuit STK4050 manufactured by Sanyo. The circuit incorporates volume and has a maximum music output power of 200W. The circuit incorporates an on board power supply; therefore, only centre tapped transformer is required to power the circuit. I t has very good quality sound. U can use it with your Home Theatre your PC & etc... You can also use it as Subwoofer Amplifier. It is a compact package for THIN-TYPE Audio sets. Easy Heat sink design to disperse heat generated in THIN-TYPE audio sets. Constant-Current circuit to Reduce supply switch-ON and switch-OFF shock noise. External supply switch-On and switch-OFF shock noise muting, Load short-circuit protection, thermal shutdown and other circuits can be tailored-designed.
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