Yu-Day Overview :021 -51698043; 51,698,042 
 Shanghai Yu Network Technology Co., Ltd. was established in days of December 2002, is a collection of notebook computers, data recovery, projector repair, office equipment maintenance, networking, training as one of the Technology Co., Ltd.. Now has a number of small and medium enterprises to provide IT outsourcing services and notebook repair, notebook repair training and network maintenance has accumulated a wealth of experience mainly in the maintenance department of the company laptop (chip-level) maintenance. 
 1, equipped: the solution of the Japanese white welding device, the BGA soldering station ERSA, Germany and other advanced equipment.. We have opened data recovery software and hardware recovery tools equipment and various software. 

 2, complete accessories: a variety of boards, access slots, chips, BGA chips, power adapter, battery, memory, hard drives, floppy drives, optical drives, PC cards. 

 3, strong technical force: the company hired a number of experts with years of experience in the maintenance level maintenance engineers: one technical director, one (many years of experience troubleshooting computer hardware laptop), maintenance engineers, two (years of chip-scale BGA repair and welding experience 2 years ), two apprentices (six removable notebook computer experience), a software engineer. Highly skilled and skilled, experienced, diligent professional. Can in the shortest possible time, the fastest repair your computer motherboards and peripheral hardware. Provide "technical advice", "hardware maintenance", "Software Debug", "information service" and other services. 

 4, with major notebook manufacturers have established good cooperative relations: domestic and international famous enterprises have set up my company authorized service center, authorized service stations and Star service award certificates, fully affirmed: "customer first" corporate services commitment and quality standards. As small and medium enterprises and individuals of outstanding IT industry, third-party service providers. 
 No matter what industry you are in, we sincerely hope to organic in conjunction with you, for each customer to provide the best quality service is our aim to make every customer satisfied is our wish. Friends hope to have the strength to work together and seek common development! 
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 Shanghai Yu-day maintenance of network (Laptop Repair Division), the National free advice hotline :400 -820-2620 
 24-hour service hotline: 13651691065 13918159346 
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 | Yu-Days Inn Shanghai convenience of repair address (repair hotline nationwide :400-820-2620) | 
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 | Pudong repair | ADD: No. 309 Fushan Road, Room 601, | TEL :021-5169 - 7346 | 
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 | Putuo repair | ADD: No. 1436, Changde Road, Tak Shing House, Block B, 27th Floor, | TEL :021-5169 - 8042 | 
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 | Yangpu repair | ADD: No. 1548, Dalian Road, Lake House, 9G Block | TEL :021-5103 - 5723 | 
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 | Minhang repair | ADD: 36, Lane Silver Biquan Road, Building B, Room 1604 night | TEL :021-5169 - 8304 | 
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 | Xu report repair | ADD: 50, Lane Po Tang Road, Building 2, Meeting Room 706, | TEL :021-3126 - 6487 | 
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 | Huangpu repair | ADD: Zhongshan South Road, No. 1752 | TEL :021-5103 - 6452 | 
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 Characteristics of surface acoustic wave touch screen 

 Higher definition, better light transmission rate. Highly durable, scratch resistance good (as opposed to resistors, capacitors, which are the surface degrees film). Responsive. Independent of temperature, humidity and other environmental factors, high resolution, long life (maintenance of a good case, 50 million times); transmission rate (92%), to maintain a clear bright image quality; not drift, just installed a correction; a third axis (ie the pressure axis) response, is currently in public use more. Surface acoustic screen requires frequent maintenance, as dust, oil stains and even liquid beverage in the screen surface, the surface of the touch screen will block waveguide slot, so that the waves can not be properly launched, or to wave the controller can not properly identify the change, which affects the normal use of the touch screen, the user must pay strict attention to sanitation. Must often wipe the surface of screen surface to keep the screen clean, and regularly conduct a full and complete erasure. ? 

 Touch-screen Principle 

 Screen Surface Acoustic Wave 

 Acoustic screen paste with the three angles are X, Y direction of the transmitting and receiving acoustic transducer (Transducer: made of special ceramic material, divided into transmitter transducer and receiver transducer. Is to control via the touch screen cable into electrical signals sent to and from the reflective stripes acoustic surface wave energy converging into electrical signals.), the four sides of the reflection of ultrasonic reflecting surface engraved stripes. When the fingers touch screen or soft objects, some acoustic energy is absorbed, thus changing the received signal, after the controller handling and touch the X, Y coordinates. 

 Four-wire resistive screen 


 Four-wire resistive screen in the surface protective coatings and grass cover between the conductive layer with two layers of transparent ITO (ITO: Indium, weak conductors, properties down to 1800 when the thickness of Egypt (Egypt = 10-10 m) below will suddenly become transparent, then thin down transmittance declines and to 300 Egyptian transmittance and thickness increase. is the resistance of all the main screen and capacitive screen materials.), and two corresponding X, Y axis, it is the door fine particles with a transparent insulation between the insulation, when the pressure generated when the touch so that the two conductive layer connected to, the changes in resistance and touch the X, Y coordinates. 

 Five-wire resistive screen 


 Five-wire resistive screen covered with grass-roots on the X, Y two directions of the voltage field added to the transparent conductive layer with a layer of ITO, the outermost layer of gold conductive layer of nickel (nickel deposit conductive layer: five-wire resistive touch screen of the outer conductive scalability is a good layer of nickel gold coating materials, conductive outer layer due to the frequent touch, use a good ductility nickel deposit materials in order to extend the service life.) is only used as a pure conductor, when touched, with the sub- contact point when the detection axis X axis and Y measured voltage value method the location of touch points. Inner layer of ITO to be four-lead, the outer one, a total of 5 leads. 

 Capacitance screen 


 Capacitance screen coated with a transparent conductive layer ITO, voltage connected to the four corners of the Ministry of scattered small-screen surface of DC, to form a uniform electric field, when the hands touch the body as a pole coupling capacitance, current from the screen, the other four corners together to form the coupling capacitor one pole, passed through the controller calculates the current touch position coordinates of the relative distance and touch. 

 Infrared Screen 


 IR touch screen is the use of X, Y direction to detect clouds and infrared matrix locate the user's touch. Infrared touch screen in front of the monitor frame to install a circuit board, circuit board arranged on the screen edges and infrared receiver infrared emission control tubes, one to one to form if they had crossed the infrared matrix. Users touch the screen, the finger will be blocked if they had been the location of two infrared, which can determine the location of touch points on the screen. Any object can change the contact on the touch-infrared and implement a touch screen operation.