In AV amplifier market Shang although DENON days Dragon no ONKYO Onkyo and YAMAHA Yamaha of products sold, but as Japan four amplifier brand is one of of days Dragon, also is has many senior AV products, like this paragraph AVR-4306 amplifier, was named times flagship, market price about 10,007 around, integrated system supplier has do 20,005 also is normal, can imagine this Taiwan amplifier is has how much, material. HDMI, network, IPOD interface, these popular contents are readily available. Our maintenance department received recently a fault with this model machine, power cannot be turned on, the yellow light keeps flashing. Maintenance after some brief introduction below, for maintenance after difficult to have rules to follow, just brief mentions, mainly some evaluation on this amplifier, the main content from the website for information.V2nservice manual download site
V2nservice manual download site
Repair amp's first step should be to test machine powered on so that users with the phenomenon described is not true, there may be new discoveries, might also happen if the user does not have clear miscarriage of Justice. Before commissioning, you should read the nameplate, see information such as the origin, working voltage, plugged into a 220-volt or 110 volt machine that can expand the failure.V2nservice manual download site
The appearance of the second step is to observe the machine maintenance, such as the fuselage there is no scar, recency and customer reach consensus is to look at the screws are there traces of removed, way, ask the customer if they have a warranty period, there is no maintenance history, if maintenance machine that failed to notice elsewhere.V2nservice manual download site
The third step is to open cover record, see if there are any cracking, corrosion, water marks, smoke and so on, touch any hot place, measure all the DC supply voltage, no matter what appliance is inseparable from the operating voltage, but most circuits use DC voltage within electronic products, in voltage in an electrical fault was not caused by normal faults can be said to account for around 80%. Measuring this standby voltage AVR-4306 normal, light flashing indicating in protected, for quickly finding trouble spots, light bulbs for main power supply relay contacts are shorted, that allows a total power in a load-free State, light bulb will light at this time. Measurement each voltage found main voltage plus or minus 45 v not normal, disconnect Exchange insurance Hou measurement Exchange normal, so suspected Hou level zoom circuit has fault caused protection, measurement each road channel output points found c level that in the reset channel has components short-circuit, disconnect Hou split Xia bulb power try machine no longer protection, normal boot Hou except in the reset channel are can normal work, left of work is maintenance c channel zoom components has.

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