Shiko Guangzhou Medical Devices Co., Ltd. specializes in maintenance services of medical equipment to do a professional third-party service company, since its inception, the starting point positioning, lead the domestic medical equipment industry, third-party service, the company's main endoscopic ultrasound and maintenance, testing, upgrades, maintenance, warranty, leasing, spare parts and supplies sales and other services related case studies phenomenon: the grating light suddenly dark image convulsively suddenly dark. Analysis: The screen light suddenly dark, without any rules, and sometimes a boot, symptoms appeared, sometimes over ten minutes to appear, and the time interval between light and dark and no law, from the impact of the phenomenon of view raster four-dimensional ultrasound maintenance, parts should be in the host signal transmission section, the power section, the display section. Check: AC 220V power supply voltage is normal, part of the normal transport signal, the display brightness when found abnormal circuit with 47 stalls x1k multimeter ohm potentiometer measuring the brightness, contrast potentiometer wiper multimeter pointer rotates the jump phenomenon. Repair: Remove the display cover 2-4 screws, remove the back cover, find potentiometer brightness, contrast potentiometer installation location, replace the potentiometer, potentiometer resistance 値 can choose between 20K-50K is also available 95 % alcohol rinse after use, the service life of more than 2 years after treatment by the test machine, image stabilization normal troubleshooting. Cause: The brightness potentiometer, the contrast potentiometer is bad Shiko Guangzhou Medical Devices Co., Ltd. specializes in maintenance services of medical equipment to do a professional third-party service companies. Brands can provide services include GE, Siemens ultrasound repair, Philips, Aloka, Hitachi GE ultrasound repair, Toshiba, Yum, Madison and so on. Maintenance contents include: color Doppler ultrasound machine Siemens repair, monitor, power supply, motherboard and other cases: a sudden power ultrasound analysis: Consider voltage fault. Siemens ultrasound service, ultrasound probe repair (certified), Nanchang, Guangzhou Shiko ultrasound service provided by medical equipment maintenance Services Limited. Shiko Guangzhou Medical Devices Maintenance Services Limited (www.zhihengmed.com) (www.zh-med.com) is a leader in Guangzhou, medical devices, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shiko leadership in Guangzhou with the staff warmly welcome all inquiries negotiations to create a better future Shiko Guangzhou.