Manual for DX-J21

Brand: JVC

Category: Audio System

Document Type: Manual

Language: EN

Available Languages: EN , ES

Uploaded: Nov. 21, 2025, 6:48 p.m.

Warranty Information

This limited warranty covers defective materials and workmanship for 1 year from the date of original purchase.

Power On/Off

Press the power button to turn the system on. The STANDBY lamp will turn off. To turn off, press the power button again; the STANDBY lamp will light red.

Source Selection

Press source buttons (DVD/CD, USB MEMORY, TAPE A, TAPE B, FM/AM/AUX) to select the desired source. Playback may start automatically.

Volume Adjustment

Use the VOLUME +/- buttons on the remote or the main unit to adjust the sound level.

Listening to Radio

Select FM or AM/AUX. Use tuning buttons to find stations. Use preset buttons to store and recall stations.

Disc/File Playback

Insert a disc or connect a USB device. Use playback controls (play, pause, stop, skip) to navigate content.

Troubleshooting and error codes

Problem	Possible Cause	Solution
Adjustments or settings are suddenly canceled	Time limit	Repeat procedure again.
Operations are disabled	Microprocessor malfunction due to external interference	Unplug and replug the AC power cord.
Unable to operate from remote control	Obstruction between remote and sensor; Batteries exhausted	Remove obstruction; Replace batteries.
No sound is heard	Speaker connections incorrect/loose; Headphones connected	Check speaker connections; Disconnect headphones.
No picture appears on screen	Video cord connections incorrect/loose	Check video cord connections.
Disc does not play	Wrong Region Code; Disc upside down	Insert disc with correct Region Code; Place disc label-side up.
Disc sound is discontinuous	Disc is scratched or dirty	Clean the disc.
Playback sounds strange	Vocal Masking or Key adjustment activated	Cancel Vocal Masking or Key adjustment.
No subtitle appears	Disc programmed to always display no subtitle	Press SUB TITLE after starting play.
Audio language is different	Disc programmed to always use original language	Press AUDIO/MPX after starting play.
Disc tray does not open/close	AC power cord not plugged in; Child Lock is on; Program Play is in use	Plug in AC power cord; Cancel Child Lock or Program Play.