Brand: Panasonic
Category: Automotive Electronics
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for CQ-C8401U/C8301U/C7401U/C7301U
Uploaded: Nov. 21, 2025, 6:27 p.m.
Warranty Information
The limited warranty covers defects in materials and workmanship for one year for parts and labor, with 90 days for accessories.
Operation Summary
Power On/Off: Press [SRC] (PWR: Power) to turn on. Hold down [SRC] (PWR) until a beep to turn off.
Face Plate Removal/Mounting: Remove the face plate to prevent theft. Press [] (Release) to remove. Slide the left side of the face plate in place and press the right end until it clicks to mount.
Face Plate Motion: Press [] (OPEN) to open/eject the disc. Press [] (OPEN) to close. Hold down [] (TILT) to adjust the viewing angle.
Volume Adjustment: Turn [VOLUME] clockwise or counterclockwise. Press [] (MUTE) to temporarily turn off the volume.
Source Selection: Press [SRC] repeatedly to cycle through Radio, CD Changer, DVD Changer, XM Tuner, CD Player, MP3/WMA Player, and AUX.
Substitutional Subwoofer: Hold down [SBC-SW] for 2 sec. to toggle the rear speaker as a subwoofer.
Troubleshooting and error codes
| Problem | Possible cause | Possible solution |
|---|---|---|
| No power to the unit | Power cord incorrectly connected. | Check wiring. |
| Fuse blows out. | Eliminate cause and replace fuse. | |
| Sound is not generated. | MUTE is set to ON. | Set MUTE to OFF. |
| Incorrect speaker wiring. | Check wiring diagram. | |
| The demonstration screen displayed and no operable | Demonstration screen is active. | Press [DISP] to end. |
| Poor contact/wiring with car battery. | Check battery wiring. | |
| Noise | Electromagnetic-wave generator nearby. | Keep generator away from unit. |
| Poor ground lead contact. | Secure ground lead to unpainted chassis part. | |
| Alternator noise. | Change ground lead wiring position or mount noise filter. |