Denon AVR-1906 - Service Manual

Other manuals for Denon AVR-1906

Operating Instructions67 pages

Brochure & Specs2 pages

Questions and Answers

S
Steven HamiltonAug 16, 2025
What to do if my Denon Stereo Receiver display is lit but no sound is produced?
- N
  Nicole JohnsonAug 17, 2025
  If the display is lit but no sound is coming from your Denon Stereo Receiver, there are several possible reasons: * Check that the speaker cables are securely connected. * Ensure the FUNCTION knob is set to a suitable position. * Verify that the volume control is not set to the minimum; turn it up to a suitable level. * Make sure MUTING is switched off. * Confirm that digital signals are being input, or select the correct input terminals for digital signals.
J
johnwoodsAug 19, 2025
Why is sound produced only from one channel on my Denon Stereo Receiver?
- A
  Anthony MartinezSep 12, 2025
  If sound is only coming from one channel on your Denon Stereo Receiver, it is likely due to an incomplete connection of the speaker cables or the input/output cables. Ensure that all connections are securely made.
R
Ryan MontgomeryAug 22, 2025
What to do if my Denon AVR-1906 Stereo Receiver display is not lit and sound is not produced when the power is on?
- C
  Chloe LambertAug 22, 2025
  If the display is not lit and no sound is produced when the power switch is on, it could be that the power supply cord is not securely plugged in. Check the power cord to ensure it's properly inserted. After turning the POWER switch on, try turning the power on with the remote control unit.
M
Matthew WashingtonAug 25, 2025
Why is my Denon Stereo Receiver display not lit but sound not produced?
- A
  Ana SmithAug 26, 2025
  If the display is not lit and no sound is produced when the power switch is on, it could be due to the power supply cord not being securely plugged in. Check the insertion of the power supply cord plug. Alternatively, try turning the power on with the remote control after turning the POWER switch on.
J
John SmithAug 27, 2025
What to do if my Denon AVR-1906 Stereo Receiver display is not lit and the power indicator is flashing rapidly?
- D
  Debbie MartinezAug 27, 2025
  If the display of your Denon Stereo Receiver is not lit and the power indicator is flashing rapidly, it could be due to a short-circuit in the speaker terminals. Switch the power off, connect the speakers properly, and then switch the power back on. Another possibility is that the ventilation holes are blocked, or the unit is operating at continuous high power with inadequate ventilation. In this case, turn off the power, ventilate the unit well, allow it to cool down, and then turn the power back on.
R
Robert Carter MDAug 30, 2025
Why are the positions of instruments reversed during stereo playback on my Denon Stereo Receiver?
- J
  James JarvisAug 30, 2025
  If the positions of instruments are reversed during stereo playback on your Denon Stereo Receiver, it's probably due to reversed connections of the left and right speakers or the left and right input/output cables. Check the left and right connections to ensure they are correct.
M
Michael MontesSep 2, 2025
Why is there a howling noise produced when the volume is high on my Denon AVR-1906 Stereo Receiver?
- J
  Jacqueline PowersSep 2, 2025
  A howling noise when the volume is high on your Denon Stereo Receiver can be caused by speaker systems being too close together; separate them as much as possible. It can also occur if the floor is unstable and vibrates easily; use cushions to absorb speaker vibrations transmitted by the floor.
R
Randy CrawfordSep 4, 2025
Why is my Denon Stereo Receiver remote control not working?
- L
  Lisa JenkinsSep 4, 2025
  Your Denon Stereo Receiver remote might not be working due to several reasons: * The batteries may be dead, so replace them with new ones. * You might be too far from the unit, so move closer. * There could be an obstacle between the remote and the unit, so remove it. * You might be pressing the wrong button, so ensure you are pressing the correct one. * The batteries might be inserted incorrectly, so insert them properly.
K
kathybakerSep 7, 2025
Why does my Denon AVR-1906 display not light up and the power indicator flashes rapidly?
- C
  Christopher WilliamsSep 7, 2025
  If the display is not lit and the power indicator is flashing rapidly, it could be due to: * Short-circuited speaker terminals: Switch the power off, connect the speakers properly, and then switch the power back on. * Blocked ventilation holes: Turn off the power, ventilate the unit well, and allow it to cool down before turning it back on. * Continuous high power operation with inadequate ventilation: Turn off the power, ventilate the unit well, and allow it to cool down before turning it back on.
A
Alec JonesSep 10, 2025
How to fix howling noise when volume is high on Denon Stereo Receiver?
- H
  Holly GarciaSep 10, 2025
  If you're experiencing a howling noise when the volume is high on your Denon Stereo Receiver, it could be due to: * Speaker systems being too close together: Separate them as much as possible. * An unstable floor causing vibrations: Use cushions to absorb speaker vibrations transmitted by the floor. If your turntable lacks insulators, consider using audio insulators (sold separately).

Summary

Service Manual Overview

Model Identification

Safety Precautions

Leakage Current Check Procedure

Details the procedure for checking leakage current.

General Service Safety Guidelines

Electrical Shock Hazard Warning

Warns about the risk of electric shock during servicing.

Critical Component Usage

Post-Service Safety Checks

Outlines necessary safety checks after service completion.

Servicing Precautions

AV Receiver Initialization Procedure

Details the process for initializing the AV receiver after component replacement.

Adjustment Procedures

Audio Section Idling Current Adjustment

Describes the procedure for adjusting the idling current in the audio section.

Video Section Adjustments

Component Video Level Adjustment

Details adjustment of component video signal levels.

Block Diagram Overview

Parts List Notes

P.W.B. Unit Parts List

CPU;Front PCB Parts List

Input-Vol PCB Parts List

Input-Vol-E3 PCB Parts List

Ext-In-E3 PCB Parts List

COMP PCB Parts List

D-Video;Pre-Out PCB Parts List

Exploded View: USA & Canada Model

Exploded View Parts List

Wiring Diagram

Schematic Diagram Notes

Schematic Diagrams (1;15): Main Board

Schematic Diagrams (2;15): Pre-Amp & 2 CH-Amp Boards

Schematic Diagrams (3;15): Front, Function, Main SW, H;P, Opt-In Boards

Schematic Diagrams (15;15): Tuner Board

Exploded View: Europe Model

Denon AVR-1906 Specifications

Power Amplifier Section

front power output (8 ohms)	85 W + 85 W
front power output (6 ohms)	120 W + 120 W
center power output (8 ohms)	85 W
center power output (6 ohms)	120 W
surround power output (8 ohms)	85 W + 85 W
surround power output (6 ohms)	120 W + 120 W
surround back power output (8 ohms)	85 W + 85 W
surround back power output (6 ohms)	120 W + 120 W

Preamplifier Section

input sensitivity/impedance	200 mV/47 kohms
output level/load impedance	SUBWOOFER 1.2 V/10 kohms
frequency response	10 Hz - 100 kHz (+1, -3 dB)
signal-to-noise ratio	98 dB (IHF-A weighted)
tone control treble	±12 dB at 10 kHz
tone control bass	±12 dB at 100 Hz

FM Section