Maintenance AVR-1611 maintenance a Denon amplifier does not power up, Denon amplifier AVR-1611 is a recently popular machine, mainly because it has more features and lower prices, including new interfaces such as HDMI, the Apple interface, USB, the advantages of price is less than 3,000. A few days ago had a client send a 1611 repair, said he had actually bought two years nor how to use, the machine is still very new, no worse than it was before the first repair.BJWservice manual download site
Apart Hou found 1611 and days Dragon AVR1622 of power as, standby voltage are using has switch power, by a alone of circuit board installation in power line imports of location, the Board Shang has a article five bit of row line output 5.2 v voltage to decoding Board available CPU work, this article line actual is three root, two root for are, two root for negative, another a root is boot following electrical control line. Measured 5.2 volts only 0.7 volts, which of course is the reason does not boot up. Measuring 300 Volt switch power supply voltage rectifier, oscillation and primary share a thick membrane block TOP258N, which also has no experience in the measurement of integrated circuits, direct replacement of the test machine, the output voltage of 4.5 volts, this phenomenon is somewhat strange,BJWservice manual download site
Voltage feedback circuit and the optical coupling part inspection found no problems, full inspection, this power supply has few parts anyway, check over all took little time. Results found a way in the starting resistor, and start a resistance made up of 5 1M resistor, resistance ever encountered this position damages are caused by voltage-free output. When you replace the resistor output voltage is normal, after all circuits on test machine is working properly, the Denon 1611 amplifier repair completed successfully.BJWservice manual download site