Fault 1: All buttons on the remote control do not work Analysis and maintenance: Most of the reasons why all the buttons on the remote control do not work are caused by the damage of the crystal oscillator. If it has been dropped or there is no "beep" sound at all with the radio check, you can directly replace the crystal oscillator with a new one. After replacing the new crystal oscillator, if the fault cannot be eliminated, you should first measure the voltage across the crystal oscillator. When any key is pressed, there will be obvious voltage changes at both ends of the crystal oscillator, which indicates that the oscillator can generate pulse signals. The second is to check whether there is a relatively weak voltage change at the output end of the remote control signal of the integrated block. If there is a change, check whether the driving triode and the infrared emission tube are damaged, otherwise most of the integrated blocks are defective.
The company has officially passed ISO9001:2008 quality system certification and ISO14001:2004 environmental system certification and CE, FCC, REACH certification, and officially produced products that meet RoHS requirements in 2005. Products are widely used in satellite receivers, LCD TVs, IP TVs, DVDs, audio and automotive electronics and other electrical products. The service brands include: DSTV, CISCO, HUMAX, COSHIP, JVC, SANYO, STRONG, STARSAT, QMAX, FTE, SKYWORTH, SMART and other 250 brands.
Founded in 2003, Shenzhen Yangchen Electronics Co., Ltd. is a private enterprise specializing in the R&D and manufacturing of remote controls. The production base of the factory is located in the famous scenic spot in Shenzhen - Shiyan Lake, with an independent workshop area of 16,800 square meters and a monthly output of 3.5 million pieces.