Tip & How-To about Denon Reciever Dra-345r

DENON DRA-345R Memory Loss/Reset issues FIX

My 24 OLD Denon Receiver showed Radio Frequency settings Memory Loss, Power UP reset issues, loss of selected inputs. After reviewing the schematic I found a gold cap (big yellow ELKO) that is responsible of keeping uC Vdd under steady Voltage to keep all settings. According original spec it should keep all data 1 month minimum. I do not know if the issue is that the leakage current has increased somewhere, or that the capacitor lost its capacity. It concerns C643 8.2mF capacitor, near IC605 and D605. I replaced the capacitor with a PANASONIC EECS5R5V155 1.5F capacitor. WIth this capacitor it does not matter if the problem is caused by leakage current, as the 1.5F is >100x more capacity. The first time when the cap needs to be charged, the unit responded little strange, but since 2nd power up this problem is fully solved. The PANASONIC device fits excellent on the C643 position, no bending of wires needed.

BTW, compliments to DENON, the original components are soldered with low amount of solder, easy to remove with manual vacuum solder remover(don't know the UK word for it), so no baking, simply remove solder, take out component, place new one.

Unit is now working again as new.

Regards and success with the repair

PS: I found the component at tme.eu

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Instructions
  1. How to Reset Denon Receivers
    • 1 Save the information currently stored in your Denon receiver, such as device commands and multi-zone controls. Some Denon receivers can control multiple rooms and each room needs to be setup properly to provide the correct controls. If the receiver was installed professionally it may be best to contact the installer before resetting the device.
    • 2 Press the "Power" button or the "On/ Standby" button to shut off the receiver. On some receivers it is best to press the button on the device instead of the remote as the remote will normally put the receiver in standby mode. Ensure the display and all other lights on the device are off. Do not unplug the Denon receiver as it will not reset.
    • 3 Press the "Power" button and at the same time press two buttons on the front panel, which are determined by the model Denon you own. Most receivers identify the two buttons inside the user's manual, while some older Denon receivers require you contact Denon for the right button combination. For example, some Denon models require the "Standard" and "DSP Simulation" buttons to be pressed simultaneously.
    • 4 The display will start flashing at about one second intervals. Release the two buttons. Turn on the receiver by pressing the "Power" or the "On/ Standby" button to verify the previous settings and saved radio stations have been erased. If the interface does not flash, the reset was not complete and needs to be re-done. Re-enter the previous settings to ensure there are no further issues with the receiver.

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how to reset denon avr4800 thx receiver?


These are the following steps to reset your Denon receiver:
1. Save the information currently stored in your Denon receiver, such as device commands and multi-zone controls. Some Denon receivers can control multiple rooms and each room needs to be setup properly to provide the correct controls. If the receiver was installed professionally it may be best to contact the installer before resetting the device.


2.Press the "Power" button or the "On/ Standby" button to shut off the receiver. On some receivers it is best to press the button on the device instead of the remote as the remote will normally put the receiver in standby mode. Ensure the display and all other lights on the device are off. Do not unplug the Denon receiver as it will not reset.




3.Press the "Power" button and at the same time press two buttons on the front panel, which are determined by the model Denon you own. Most receivers identify the two buttons inside the user's manual, while some older Denon receivers require you contact Denon for the right button combination. For example, some Denon models require the "Standard" and "DSP Simulation" buttons to be pressed simultaneously.


4.The display will start flashing at about one second intervals. Release the two buttons. Turn on the receiver by pressing the "Power" or the "On/ Standby" button to verify the previous settings and saved radio stations have been erased. If the interface does not flash, the reset was not complete and needs to be re-done. Re-enter the previous settings to ensure there are no further issues with the receiver.






Read more: How to Reset Denon Receivers ' eHow.com http://www.ehow.com/how_7441680_reset-denon-receivers.html#ixzz1wpEtIRTB


If the information helped you out please give some me some ratings. Thanks

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Denon avr-3805 suddenly picture went out on tv (says no signal). Denon shows 'voff' on the screen. I cant figure out what happened.


I called customer support and they had not heard of this problem, and could not even tell me what the "V.Off" showing on the display represents. But, . . . the problem was solved by resetting the memory - by powering off, and powering back on while holding down both the Mode and Analog input buttons. Although this wiped out all my settings, the "V.Off" on the display disappeared, and the video now works. Problem solved.

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how do i assign a record player to ''aux ''input terminals of a denon avr 1507 amplifier


Depends on the record player (turntable). If it's old-school it will need a PHONO preamplifier to raise the level and frequency-balance the output according to the RIAA curve. Otherwise it will be uselessly low in volume and tinny sounding.

Phono preamps are available at a lot of electronics stores online. Google it. If you have an old school receiver with a PHONO function you could use IT for the TT and send its output to the Denon.

If it's a newer TT it may have its own internal (selectable) preamp. Then it would drive any standard Line Level audio input.

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You may have had the receiver set to "Stereo" mode, or Analog instead of "Digital" or "Auto" (automatically switches to digital when it detects a signal) modes. Also, setting it to "Direct" (2-channel from an analog source) could result in loss of center channel. Or your Surround Parameter dial (on the higher-end Denons, at least) could be set to a 2-channel mode.
Finally, if your digital inputs are incorrectly assigned (e.g., COAX1 instead of OPT1, or OPT2 instead of OPT1) for that source, the receiver will use the Analog signal which is stereo-only. You could get a center channel via Dolby Pro Logic II but it would be a "matrixed" signal, not the "real" center channel you could get via digital input using Dolby Digital or DTS.
(If all else fails, re-check your center channel speaker wire connections. It's very unlikely, but also possible, that either the receiver center channel amp or the speaker has failed.)

Feb 13, 2010 | Denon AVR-682 Receiver

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