This amp to be repaired when the symptom is, after power up the power on for about five seconds the display turns off, and then power on again after a few seconds, and this phenomenon is typically CPU fault protective circuit check to shut down, AV amplifiers have this function in General.Zdiservice manual download site
Models the cover, found the machines are new, although some dust, but the circuits are intact, no traces of repairs, customers are also used for years without any trouble, this is used when it suddenly stopped working a few days ago. Due to power on boot after a few seconds to protect, this time to a pair of amplifier output to zero voltage, relay, of course no suction measurement only transistor's emitter, after troubleshooting amplifier amplifier circuit is no problem,Zdiservice manual download site
Protection time can also illustrate the problem, generally zero point overvoltage protection time was like a second or two, off very quickly. And continues to measurement other circuit of work voltage, check to are 24 v normal, are 5 v normal, are 15 v normal, but negative 15 v measurement 0.7 v, power measurement negative 15 v line on to not short-circuit, estimated is powered wrong, powered from 7915, measurement 7915 subsection 1.2 feet Zhijian 26 v, description is 7915 bad has, replaced Hou negative 15 v normal has, boot try machine no again protection, access various signal are normal work.Zdiservice manual download site
TL-AV-R series amplifier model number is mostly midrange models, such as the AV-R1803,AV-R1604,AV-R1404 and other models we repair before, machine internal circuits are similar, basic operating voltage is above mentioned that several groups, maintenance is also key to check the contents.Zdiservice manual download site
Zdiservice manual download site
Particular attention to the replacement of components must be restored, not manufacturing problems, not expansion, repair is a no pressure in more detail than embroidery work, computers now, check the component information is also very convenient, almost all Taobao buy, so there is absolutely no need to feel free to substitute components that make the circuit board is a mess. Denon amplifier repair need is circuit knowledge and experience, and with these basic requirements will no longer be a difficult repair basic power amplifier failure.Zdiservice manual download site