DENON and YAMAHA as times generation amplifier of two big brand, its products also throughout high school low-end, to caters to young consumption crowd, days Dragon launched has more than 2000 more Yuan of simple models 16 series, these machine materials simple, price lower, quality and five thousand or six thousand Yuan of machine than imagined also is to poor some, we in days Dragon amplifier maintenance in the found these times generation amplifier of fault rate obviously to than other in the end models slightly high.MBJservice manual download site
Denon AVC-2310 PA was listed in 2009 is a midrange product, priced at around 6,000. Teardown observation of internal structure, the great one decoder Board looks like a computer Board was full of large and small chips. Power AC switch, standby 5 volt voltage normalMBJservice manual download site
MBJservice manual download site
Start the standby key, hear relays, display light, is operating normally. Input digital signal identification display, but not hear the sound output relay suction, then what is the reason, is a related circuit protection relay circuit problems? Measurement has all has identifies of voltage are normal, decoding Board following also has a Zhang circuit board, looks to split has check very trouble, to not detours, not waste not necessary of energy, decided first from circuit diagram starts with, through check out circuit diagram found, output following electrical of powered is alone by a only 7824 provides, measurement 7824 of entered output voltage are normal, that will is protection does, according to operation function normal, and digital signal recognition normal to judge, not likeMBJservice manual download site
MBJservice manual download site
Nor should it. Exported from 7824 intends to cut 24 volts to a voltage-side, but then he noticed, 7824 output three lines are on 7824 pin with a plug, gently pull away, try reconnecting the plug, switch on for about five seconds after heard a loud snap sound. Voice back to normal. Faults can be analyzed, old burn while they buy power amplifier depends on the origin still has a grain of truth, processing machines, production in the country seems to be worse for some, this is the fact that people don't want to believe but have to admit

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