W
Wesley BarkerSep 23, 2025
What does “CANNOT REC” mean on my JVC DX-J21?
- BBridget GibsonSep 23, 2025
The System cannot perform recording.
To Next PageTo Next PageWhat does “CANNOT REC” mean on my JVC DX-J21?
The System cannot perform recording.
What to do if there is no sound coming from my JVC DX-J21 Stereo System?
Check that the speaker connections of your JVC Stereo System are correctly connected and not loose. Also, ensure headphones are not connected, as this will mute the speakers.
Why won't my JVC Stereo System play the disc?
If your JVC Stereo System displays “REGION ERR”, you may have inserted a DVD Video whose Region Code is not “1.” If not, make sure the disc is placed with the label side up.
What to do if no picture appears on the screen of my JVC DX-J21?
Make sure the video cord connections of your JVC Stereo System are correctly connected and not loose.
What to do if operations are disabled on my JVC DX-J21 Stereo System?
The built-in microprocessor of your JVC Stereo System may have malfunctioned due to external electrical interference. Unplug the AC power cord and then plug it back in to resolve this.
Why can't I open the cassette holder on my JVC Stereo System?
The power supply from the AC power cord has been cut off while the tape was running. Turn on the JVC Stereo System.
Why is the karaoke scoring result wrong on my JVC DX-J21?
It is recommended to sing more than 3 minutes to obtain a correct scoring result on your JVC Stereo System. Also, check the microphone connection and input level.
Why doesn't the timer work on my JVC DX-J21 Stereo System?
The Timer starts working only when the JVC Stereo System is turned off. It will not work if the System has been turned on when the on-time comes.
Why is the audio language wrong on my JVC DX-J21 Stereo System?
Some discs/files are programmed to always use the original language initially. If this happens on your JVC Stereo System, press AUDIO/MPX after starting play.
What to do if the playback sounds strange on my JVC Stereo System?
Cancel Vocal Masking and Key adjustment on your JVC Stereo System.
General| Brand | JVC |
|---|---|
| Model | DX-J21 |
| Category | Stereo System |
| Language | English |
Safety warnings against opening the unit to prevent electrical shock risks.
Information regarding FCC rules and potential radio frequency interference.
Note for CATV system installers regarding proper cable grounding.
Warning to protect the appliance from rain, moisture, and electric shock.
Precautions to reduce risks of electrical shock, fire, and damage from moisture.
Caution about potential hearing loss from excessive sound pressure from headphones.
Important safety instructions for Class 1 Laser Products, advising against opening.
Instructions to prevent personal injury or damage during unpacking and installation.
Guidelines for proper appliance placement and protection from environmental hazards.
Details on maintaining adequate air paths around the system for optimal heat dissipation.
Specific placement advice to ensure correct ventilation and prevent overheating.
Overview of playable disc/file types and supported audio formats.
Explanation of symbols and conventions used in the manual for clarity.
Guidelines for installing the system and safely handling power sources.
Precautions regarding moisture condensation and internal heat buildup.
Advice on general handling, disconnection, and a warning against disassembly.
Instructions for connecting video/audio components and AM/FM antennas.
Guidance on connecting speakers, subwoofer, and the main power cord.
Detailed steps for connecting to TVs, monitors, and digital audio equipment.
Instructions for assembling and connecting AM and FM antennas for optimal reception.
Steps for connecting auxiliary audio devices and the main power cord.
Detailed instructions for connecting the main speakers and the subwoofer.
Steps for connecting USB storage and preparing the remote control.
Instructions for canceling the demonstration mode and changing the TV color system.
Explanation of indicators related to audio sources and karaoke functions.
Details on indicators for disc/tape status and FM reception.
Explanation of indicators for timers, playback modes, and sound modes.
Information on the main display area and the USB indicator.
Steps for turning the system on/off and selecting playback sources.
Guidance on adjusting volume and using headphones for private listening.
Detailed steps for adjusting volume and tuning radio stations.
Instructions on how to store and recall preset radio stations.
Procedures for inserting discs and connecting USB mass storage devices.
Explanation of basic playback controls and on-screen guide icons.
Methods for selecting specific discs, titles, groups, chapters, and tracks.
How to use the disc menu and search for specific parts of media.
Instructions for playing SVCD/VCD discs with PBC, including menu navigation.
Details on inserting, playing, rewinding, and controlling tape direction.
How to adjust speaker output balance and reinforce bass sound.
Using the VARIO BASS function to customize bass sound characteristics.
Guide to choosing from various preset sound effect modes.
Steps to create and store personalized sound modes.
How to activate the 3D Phonic feature for a spatial sound experience.
Setting automatic sound level increase for DVD Video playback.
How to adjust picture tone settings and system display brightness.
Instructions for setting the internal clock for timer functions.
How to choose different audio tracks and subtitle languages during playback.
Options for changing camera angles and reviewing playback quickly.
Detailed steps for subtitle selection, view angle changes, and quick playback review.
How to use pause, frame-by-frame, and slow-motion playback features.
Instructions on how to use the zoom feature to magnify the picture.
Steps for arranging playback order of chapters/tracks/files up to 99.
How to play loaded discs in a random order and exit the mode.
Steps for checking, modifying, or exiting a programmed playback sequence.
How to set repeat playback for discs, tracks, files, and programs.
Using A-B Repeat for specific sections and enabling the Child Lock.
Explanation of the on-screen bar elements and their meanings.
Visual representation of on-screen bars for DVD, CD, VCD, USB, and file playback.
Details on playback information, conditions, and operation icons.
How to use the on-screen bar to access menus for repeat settings.
How to change time displays and select repeat play modes.
Detailed steps for A-B repeat and searching by elapsed time.
Instructions for searching and playing specific chapters using the on-screen bar.
Step-by-step guide to searching for specific playback times.
Step-by-step guide to searching for specific chapters.
Explanation of the control screen for DVD-VR playback.
Explanation of the control screen for AV and JPEG file playback.
Details on source, file information, playback modes, and highlight bar.
How to start playback for JPEG, Video, and DVD-VR files using the control screen.
Setting repeat modes for various file types via the control screen.
How to activate and use the zoom function on JPEG/ASF files.
Steps for inserting a recordable cassette into deck B and preparing it.
How to check and change tape direction and reverse mode settings.
Identifying the sources available for recording onto tape.
Basic procedures for starting and stopping tape recording operations.
How to dub tapes between decks and perform synchronized recording.
Using the one-track recording feature for specific tracks/files.
Initial setup for karaoke, including microphone connection and MIC LEVEL.
How to sing along to music and record your vocals.
Adjusting microphone volume and managing mic mixing settings.
Instructions for activating, deactivating, and managing mic mixing.
How to adjust vocal masking, channels, and temporary vocal recovery.
Using the system to score your karaoke singing performance.
How to apply echo effects and adjust the key for vocals.
Setting the difficulty of karaoke scoring and controlling fanfare.
Steps to adjust the microphone volume for karaoke.
How to program a sequence of songs for karaoke playback.
Instructions for setting automatic recording and daily timers.
Details on how timers activate and select playback sources.
How to set the volume level when using timer functions.
How to set the sleep timer to turn off the system automatically.
Explanation of how different timers interact and prioritize.
Basic procedure for accessing and navigating the system's setup menu.
Configuring language preferences and monitor type for picture display.
Setting screen saver options and selecting playback file types.
Configuring digital audio output and down mix for audio equipment.
Adjusting dynamic range compression and resume playback features.
Activating/deactivating on-screen guides and other miscellaneous settings.
Instructions for controlling TV power, input mode, volume, and channels.
Recap of system features and notes on changing the color system.
Details on playable file types for USB mass storage devices.
Technical details and recommendations for playing JPEG, MPEG, and ASF files.
References to other sections for sound, unique playback, special picture, and advanced operations.
Summaries of on-screen operations and general recording procedures.
Overview of karaoke operations, sound track adjustments, and scoring.
Guidelines for maintaining system performance and handling discs.
Instructions for handling tapes, protecting recordings, and cleaning the system.
Common problems and solutions for general operation and radio reception.
Solutions for issues related to playing discs, files, and tapes.
Addressing problems with recording, karaoke functions, and timer operations.
Technical specifications for optical digital audio output signals from DVD Video and DVD-VR discs.
Technical specifications for optical digital audio output signals from other disc and file types.
A comprehensive list of language codes for reference.
Detailed technical data for the amplifier, speakers, and subwoofer.
Specifications for the tuner, media players, USB storage, and cassette deck.
Overall system specifications and a list of supplied accessories.
Information on how to get help from JVC for setup, operation, and service.
A crucial warning against attempting self-service and referring to qualified personnel.
Details on the limited warranty terms, coverage, exclusions, and customer responsibilities.
