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Denon AVR-1604 - Service Manual

Denon AVR-1604
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SERVICE MANUAL
MODEL
AVR-1604/684
AVC-1580
AV SURROUND RECEIVER / AMPLIFIER
16-11, YUSHIMA 3-CHOME, BUNKYO-KU, TOKYO 113-0034 JAPAN
X0174V.02 DE/CDM 0311
For U.S.A., Canada, Europe, U.K.,
Asia, China,Taiwan R.O.C., Korea
& Japan model
サービスをおこなう前に、このサービスマニュアルを
必ずお読みください。本機は、火災、感電、けがなど
に対する安全性を確保するために、さまざまな配慮を
おこなっており、また法的には「電気用品安全法」に
もとづき、所定の許可を得て製造されております。
従ってサービスをおこなう際は、これらの安全性が維
持されるよう、このサービスマニュアルに記載されて
いる注意事項を必ずお守りください。
本機の仕様は性能改良のため、予告なく変更する
ことがあります。
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
修理の際は、必ず取扱説明書を参照の上、作業を
行ってください。
本文中に使用しているイラストは、説明の都合上
現物と多少異なる場合があります。
補修用性能部品の保有期間は、製造打切後8年です。
注 意
For purposes of improvement, specifications and
design are subject to change without notice.

Other manuals for Denon AVR-1604

Questions and Answers

  • B
    Brenda KirbySep 10, 2025
    Why is sound only produced from one channel on my Denon AVR-1604 Stereo Receiver?
    • S
      Stephen CraneSep 10, 2025
      Sound coming from only one channel typically means there's an incomplete connection. Check that your speaker cords and input/output cords are securely connected.
  • J
    Jeffrey LewisAug 22, 2025
    Why is my Denon Receiver not working with the remote control?
    • J
      Jonathan JonesAug 22, 2025
      If your Denon Receiver isn't responding to the remote control, here's what you can check: 1. Replace the batteries with new ones, as the current ones may be dead. 2. Make sure you're close enough to the unit; the remote might be too far away. 3. Remove any obstacles between the remote and the receiver. 4. Ensure you're pressing the correct button. 5. Verify that the batteries are inserted correctly, with the < and > ends in the proper orientation.
  • A
    Amy FloresAug 25, 2025
    How to fix a Denon Receiver with no display and sound when turned on?
    • H
      hardinkathleenAug 25, 2025
      If the Denon Receiver display is not lit and no sound is produced when the power operation switch is on, check that the power supply cord is securely plugged in. Also, try turning the power off with the remote control after turning the POWER operation switch on.
  • M
    mirandahernandezAug 26, 2025
    What to do if Denon Receiver display is off and power indicator flashes rapidly?
    • K
      Kevin TorresAug 26, 2025
      If the display of your Denon Receiver is not showing anything and the power indicator is flashing rapidly, it could be due to a short circuit in the speaker terminals or blocked ventilation holes, or continuous high power operation with inadequate ventilation. Turn the power off, ensure the speakers are properly connected, and make sure the ventilation holes are unblocked to cool down the unit. Then, turn the power back on.
  • C
    Charles RobinsonAug 27, 2025
    Why is my Denon AVR-1604 Stereo Receiver display lit but no sound is produced?
    • T
      Thomas PatelAug 27, 2025
      Several factors can cause this issue: * Speaker cords might not be securely connected, ensure they are. * The audio function button might be in an improper position; set it correctly. * The volume control could be set to the minimum; increase the volume. * MUTING might be on; switch it off. * If you've selected a digital input, ensure digital signals are being input, or select the correct input jacks.
  • T
    Tiffany ReillyAug 29, 2025
    What to do if the Denon AVR-1604 Stereo Receiver display is not lit and no sound is produced when the power switch is on?
    • D
      Deborah DominguezAug 29, 2025
      If the display isn't lit and no sound is produced when the power switch is on, make sure the power cord is securely plugged in. After turning the POWER operation switch on, turn the power off with the remote control unit.
  • V
    Vincent MannSep 18, 2025
    Why are the instruments reversed on my Denon Stereo Receiver during stereo playback?
    • D
      David HudsonSep 18, 2025
      If the instruments sound reversed during stereo playback on your Denon Stereo Receiver, the left and right speakers or the left and right input/output cords may be reversed. Check the left and right connections to correct this.
  • D
    daleyoungSep 12, 2025
    How to fix reversed instrument positions during stereo playback on my Denon Stereo Receiver?
    • K
      Krystal PattersonSep 12, 2025
      If the instrument positions are reversed during stereo playback, it's likely due to reversed connections of the left and right speakers, or the left and right input/output cords. Double-check these connections to ensure they are correct.
  • B
    Brittney CantuSep 8, 2025
    What to do if the Denon AVR-1604 display is not displayed and the “ON/STANDBY” LED flashes at a high rate?
    • D
      David LopezSep 8, 2025
      This issue can arise due to a few reasons: * Speaker terminals might be short-circuited. If so, switch the power off, connect the speakers properly, and then switch the power back on. * The ventilation holes of the set might be blocked. In this case, turn off the set’s power, ventilate it well to cool it down, and then turn the power back on. * The unit might be operating at continuous high power conditions and/or inadequate ventilation. If that's the case, turn off the set’s power, then ventilate it well to cool it down. Once the set is cooled down, turn the power back on.
  • J
    joanne32Sep 4, 2025
    Why are the stereo positions reversed on my Denon Receiver?
    • S
      Sandra PayneSep 5, 2025
      If the instrument positions are reversed during stereo playback on your Denon Receiver, check the left and right connections of the speakers or the input/output cords. Make sure they are correctly connected.

Summary

Safety and Service Precautions

Leakage Current Check

Ensures electrical safety by checking leakage current before returning the unit.

General Service Precautions

Guidelines for safe servicing, including shock prevention and part handling.

Safety-Critical Parts

Identifies and emphasizes the use of critical replacement parts marked with ▲.

Initialization Procedure

Steps to initialize the AV SURROUND RECEIVER after component replacement.

System Diagrams

Level Diagrams

Illustrates signal levels across various audio channels within the unit.

Block Diagram

Provides an overview of the unit's internal architecture and signal flow.

Wiring Diagram

Shows external connections and inter-board wiring of the unit.

Adjustment Procedures

Tuner Alignment

Steps for aligning the FM and AM tuner sections using measuring instruments.

Idling Current Adjustment

Procedure for adjusting the idling current in the audio section's amplifier circuits.

Component Identification and Layouts

Semiconductor ICs and Pinouts

Details on major ICs, their functions, and pin configurations.

FL Display Details

Information on the front panel display, including assignments and assignments.

Printed Wiring Board Layouts

Component placement diagrams for various internal circuit boards.

Parts Lists

Parts List Notes and Conventions

Explains symbols, codes, and conventions used in the parts lists.

PWB Parts Lists

Detailed lists of parts for each Printed Wiring Board assembly.

Exploded View Parts Lists

Parts identification based on exploded views for different regional models.

Packing and Accessory Parts

Lists of items included in the product packaging and accessories.

Schematic Diagrams

Input;Volume and DSP Units Schematics

Circuit diagrams for the Input/Volume and DSP sections.

CNT, Pre Amp, SB Amp Units Schematics

Circuit diagrams for CNT, Pre Amp, and SB Amp boards.

Main and CPU Units Schematics

Circuit diagrams for the Main and CPU boards.

Video and Tuner Units Schematics

Circuit diagrams for Video and Tuner related units.

Denon AVR-1604 Specifications

General IconGeneral
Speakers connectivity type-
Receiver typeSurround
Audio output channels6.1 channels
Power output per channel (1KHz@6 Ohm)110 W
Power output per channel (20-20KHz@8 Ohm)75 W
Ethernet LANNo
Supported radio bandsAM, FM
Product colorBlack
Audio decodersDTS Neo:6, DTS-ES (Discrete 6.1), DTS-ES (Matrix 6.1), Dolby Digital, Dolby Digital EX, Dolby Pro Logic II
Weight and Dimensions IconWeight and Dimensions
Depth417 mm
Width434 mm
Height147 mm

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