Denon DVD-3930 - Service Manual

Other manuals for Denon DVD-3930

Operating Instructions54 pages

Questions and Answers

V
Veronica GuerraAug 17, 2025
What to do if picture does not appear with HDMI connections on Denon DVD-3930?
- J
  Julie PhamAug 17, 2025
  If you're not getting a picture with HDMI connections, first, check the HDMI connections and the lighting conditions of HDMI-related indicators. Next, ensure that the compatible input formats of your connected monitor device match the DVD player's input format (HDMI FORMAT). Finally, verify that “VIDEO OUT” in the pure direct settings is not set to “OFF” or “ALL OFF.”
C
christinagrayAug 19, 2025
Why does picture not appear on my Denon DVD Player?
- H
  Haley JohnsonAug 19, 2025
  If the picture does not appear, check the connections to your Denon DVD player and ensure they are secure. Also, verify that “VIDEO OUT” in the pure direct settings is not set to “OFF” or “ALL OFF”. Finally, make sure the TV’s input is set to “video.”
M
Matthew JimenezAug 22, 2025
Why is there no sound from my Denon DVD-3930, or the sound is hard to hear?
- J
  John NortonAug 22, 2025
  If you experience no sound or the sound is hard to hear, check all connections. Ensure the proper inputs are selected on your TV or stereo system. Also, check the “DIGITAL OUTPUT” and “COMPRESSION” settings. Note that digital signals are not output for Super Audio CDs, so use analog or DENON LINK 3rd connections. Also, when HDMI connections are made with a device not compatible with HDMI Ver. 1.1, the audio signals of DVD-Audio discs that are copyright protected with CPPM are not output. No audio signals are output from the HDMI terminal if “VIDEO OUT” or “DIGITAL OUTPUT” in the pure direct settings is set to “OFF” or “ALL OFF”.
Q
qbakerAug 25, 2025
What to do if playback does not start even when the 1 button is pressed on Denon DVD-3930, or starts but stops immediately?
- J
  Jeffrey ChavezAug 26, 2025
  If playback doesn't start when you press the 1 button, or if it starts and stops immediately, consider these possibilities: * Condensation may have formed. Let the unit sit for 1 to 2 hours. * You might be trying to play a disc that is not compatible. * The disc may be dirty. Wipe the dirt off or replace the disc.
C
Christopher EllisAug 27, 2025
What to do if I forgot password for restricting viewing on my Denon DVD-3930?
- M
  Mark MurphyAug 27, 2025
  To reset a forgotten password for viewing restrictions, reset all initial settings to the factory defaults. In stop mode, simultaneously press the 1 and 9 buttons on the main unit. Ensure that the “INITIALIZE” indicator turns off on the TV screen.
L
Luis GarciaAug 30, 2025
How to fix power if it does not turn on Denon DVD Player?
- R
  Raymond McguireAug 30, 2025
  If the power does not turn on, ensure the power supply cord is properly plugged into the power outlet.
R
Renee BlanchardSep 2, 2025
What to do if playback does not start when a title is selected on Denon DVD Player?
- J
  jonesjamesSep 2, 2025
  If playback doesn't start when you select a title, check the "Viewing restriction level" setting.
M
mossbrandiSep 5, 2025
Why is the audio or subtitle language not the language set in the initial settings on my Denon DVD-3930 DVD Player?
- J
  jacob60Sep 5, 2025
  If the audio or subtitle language is not the language set in the initial settings, it's likely because the DVD does not contain sound or subtitles in that language.
A
Angela NunezSep 7, 2025
How to change the aspect ratio on Denon DVD-3930?
- C
  Carl CurtisSep 8, 2025
  If the picture is not displayed in the correct 4:3 (16:9) aspect ratio, set the “TV ASPECT” and “SQUEEZE MODE” items correctly for your TV. Also, either set the keystone correction setting to “0” or readjust it.
B
Bryan BrownSep 10, 2025
How to change menu screen language on Denon DVD-3930 DVD Player?
- C
  Colin FordSep 10, 2025
  If the menu screen messages are not displayed in the desired language, check the “DISC MENUS” setting at “LANGUAGE SETUP” in the initial settings.

Summary

SERVICE MANUAL

注意 (CAUTION)

Important safety precautions before performing service.

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK

Check leakage current or line to chassis resistance before returning unit.

LASER RADIATION

Do not stare into beam or view directly with optical instruments.

CAUTION

Points to heed during servicing and inspection.

DISASSEMBLY

Disassembly and abandonment

Procedures for disassembling the unit and abandoning parts.

1. Top cover & Inner cover

1.1. トップカバー (Top cover)

Procedure for removing the top cover.

4. Power P.W.B. assy etc.

4.1. 電源基板 assy (Power P.W.B. assy)

Steps to remove the power supply board assembly.

DIAGNOSTICS OF OPTICAL PICKUP AND REPLACING TRAVERSE UNIT

光ピックアップの故障診断とトラバースユニットの交換 (Failure diagnostics and Traverse Unit replacement)

Procedure for diagnosing optical pickup failure and replacing traverse unit.

1. Iop checked Method

1.1. DVD laser current check

Procedure to check DVD laser current.

SERVICE MODE

1. Aging Mode

Procedure for entering and performing the aging mode.

4. Test mode

4. テストモード (4. Test mode)

Instructions for entering and selecting modes in the test mode.

(7) Test mode detailed table

Table 1: Servo adjustment value display mode details

Detailed table for servo adjustment value display modes.

TROUBLE SHOOTING

1. GU-3750-2 (DIGITAL POWER UNIT)

Troubleshooting steps for the Digital Power Unit (GU-3750-2).

ELECTRICAL ADJUSTMENT FOR VIDEO

1. SETTING

Initial setup procedures for video adjustment.

BLOCK DIAGRAM

SEMICONDUCTORS

1. IC’s

List and pin functions of major integrated circuits used.

PRINTED WIRING BOARDS

GU-3749 MAIN;A. VIDEO P.W.B. UNIT

Component layout diagram for the Main/Video PWB Unit.

NOTE FOR PARTS LIST

Resistors

Explanation of resistor codes and markings.

PARTS LIST OF P.W.B. UNIT (for E3 model)

SEMICONDUCTORS GROUP

List of semiconductor components on the PWB.

EXPLODED VIEW

Parts marked with this symbol have critical characteristics.

Warning about parts with critical characteristics.

WIRING DIAGRAM

MEASURING METHOD AND WAVEFORMS

NOTES

Notes regarding measurement methods and waveforms.

NOTE FOR SCHEMATIC DIAGRAM

WARNING:

Warning about critical parts in schematics.

SCHEMATIC DIAGRAMS (1;20)

Schematic diagram of the Main Unit (Part 1 of 20).

PRINTING THE SERVICE MANUAL

TO PRINT FULL SIZE SCHEMATIC DIAGRAMS

Instructions for printing full-size schematic diagrams.

Denon DVD-3930 Specifications

General

Audio D/A Converter	192 kHz/24-bit
Progressive Scan	Yes
HDMI Output	Yes
Dolby Digital Decoding	Yes
DTS Decoding	Yes
Disc Types	DVD-Video, DVD-Audio, CD
Video Output	Composite, S-Video, Component
Audio Output	Coaxial, Optical
Upscaling	Up to 1080p