Audio-Video Sound Receiver (2004-06)
Dimensions: 434 x 171 x 429mm
Tuning range: FM, MW
Power output: 120 watts per channel into 8Ω (stereo)
Surround output: 120W (front), 120W (center), 120W (rear)
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 0.05%
Input sensitivity: 2.5mV (MM), 200mV (line)
Signal to noise ratio: 74dB (MM), 102dB (line)
Output: 150mV (line)
Speaker load impedance: 6Ω to 16Ω
Digital inputs: optical, coaxial
Video Connections: component, composite, SVHS
There are few technical issues which is very common we found in Denon AVR-3805 that we will discuss here:-
Solution:- If there is no power or no LED light or no display then 1st you need to check the power socket by changing with some other device, if other device is working fine in the same socket that means power socket(AC line voltage) absolutely fine. Now you need to check the power cable which should be connected firmly at the AC power socket of Denon AV receiver which is built at the backside cabinet. If it is connected properly that means system has technical issues which can be solved by doing this, just remove the back cabinet by unscrew the 8 screws, then check the power supply PCB (circuit) which is built vertically at the AC power input section/side, then check the main fuse, if it is blown then change the main fuse with the same value( fuse value is measured by Ampere) now probably your system will turn on and your problem is solved. If the fuse blown again after changing by new one within a fraction of second that means the power supply circuit(PCB) is short and you should visit to authorized service centre to check/ change the main Switching IC, bridge rectifier diode, main filter capacitor, 4148 diode, quarter watts resistor and few low voltage zener diode. After doing this your power supply will be absolutely fine and your AV receiver/amplifier will work like earlier.
Fault:- No audio from any channel.
Solution:- Make the system factory reset by press and hold the tuner + and tuner – button together in standby condition, release the two button when display start flashing at interval of about 1 second, then follow the instruction on TV or projector screen, finish all the steps on screen, when complete it then try with input signal through HDMI cable. Hopefully it will work.
If the problem still persists then try to update the firmware through USB which is freely available online.
If the problem still persists then check all the input signals like analogue coaxial and optical too, if there is no sound on any kind of signal mode that means the problem is in HDMI card and it has to be replaced or to be repaired by authorised service Center.
If you found the HDMI card is perfect then the problem is in pre amplifier or main power amplifier section.