Jensen MPR2121 - Mechless Receiver Manual
- 1 Preparation
- 2 Wiring Diagram
- 3 Control Locations
- 4 General Operation
- 5 AM/FM Tuner Operation
- 6 USB Operation
- 7 RGB Color Operation
- 8 Bluetooth Operation
- 9 Jensen J-Link P2 App Operation
- 10 Voice Activation
- 11 Front 3.5mm Aux Input
- 12 Limited One Year Or Two Year Warranty
- 13 Specifications
- 14 Troubleshooting
- 15 References
- 16 Download manual
- 17 In Other Languages

Preparation
Please read entire manual before installation.
Before You Start
- Disconnect negative battery terminal. Consult a qualified technician for instructions.
- Avoid installing the unit where it would be subject to high temperatures, such as from direct sunlight, or where it would be subject to dust, dirt or excessive vibration.
Mounting the Head Unit
Typical DIN mounting
- Insert the mounting sleeve into the installation kit or dashboard.
- Bend multiple mounting tabs around the mounting sleeve until the mounting sleeve is secure.
- Connect all wiring harnesses and slide the head unit into the mounting sleeve until it clicks into place.
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- Use the removal keys to remove the unit.
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Wiring Diagram

FUSE
When replacing the fuse, make sure new fuse is the correct type amd amperage. Using an incorrect fuse could damage the radio. The unit uses one 10 amp ATM fuse located beside the Heat Sink
Control Locations

- Power / Mute
- Voice Control
- Tune/Track Down
- Volume Knob
- Bluetooth Talk
- Tune/Track Up
- USB Port
- Display
- Auxiliary Input
- Reset
- Dimmer
- Preset 6 / Folder Up
- Preset 5 / Folder Down
- Preset 4 / Random
- Source
- Preset 3 / Repeat
- Preset 2 / Intro
- Preset 1 / Play/Pause
- Band / Go Back
- Microphone
General Operation
| Power On/Off | Press the button to turn the unit on. Press again to turn the unit off. |
| Changing Sources | Press SOURCE to select between Radio, USB, Auxiliary Input and Bluetooth. Modes of operation are shown in the display. |
| Volume | Adjust volume using the volume knob (00-40). |
| Mute | Press to silence the audio. Press again to resume listening at the previously selected volume. |
| Auxiliary Input | Insert a 3.5mm cable in the unit's front AUX port. |
| Reset | Press the RESET button to reset the unit back to the factory settings if abnormal operation occurs. The reset button is located on the front panel. |
| Setting the Clock | With the unit on, press DISP to display clock time. Press and hold DISP until the hours begins to flash, then release. Rotate the volume knob to adjust the time. Press and hold DISP to finish the clock setting. |
| Display | Press DISP to toggle display between various displayed information. |
| Audio / Menu | Press the volume knob momentarily to select between audio functions. Press and hold the volume knob for more than two seconds to select between the menu functions. Rotate the volume knob left/right to adjust or activate the desired function/audio. |
AM/FM Tuner Operation
| Seek Tuning | Press TUNE or TUNE to seek to the previousor next strong station. |
| Manual Tuning | Press and hold TUNE or TUNE to enter manual tuning mode, then press TUNE or TUNE momentarily to change radio frequency up or down one step at a time. Press and hole TUNE or TUNE to advance quickly. |
| Band | Press BAND to select between FM1, FM2, FM3, AM1 and AM2 bands. Up to six presets can be programmed for each band, enabling up to 18 FM stations and 12 AM stations to be stored in memory. |
| Storing Presets | Up to 18 FM and 12 AM stations can be stored. To store a station, select the desired band and station. Press and a station, select the desired band and station. Press and hold the desired preset button (1-6) for more than two seconds. When stored, the preset number will appear in the display. |
| Recalling Presets | Preset stations can be recalled any time by pressing the corresponding preset button. |
| Automatically Store | Press and hold MENU for more than 2 seconds, then press DISP to store 18 FM stations and 12 AM stations automatically. |
| Preset Scan | Touch PS to recall each preset station that has been stored in memory for each band. (Available with the Jensen Smart Remote App only) |
USB Operation
| Playing MP3 & FLAC Files | To play MP3 files, insert a USB device containing MP3 or FLAC files. |
| Track Select | Press TUNE to skip to the beginning of the next track. Press TUNE to skip to the beginning of the previous track. |
| Fast Forward and Reverse | Press and hold TUNE or TUNE to fast forward or reverse a track. |
| Pause | Press to temporarily stop USB playback. stop USB playback.Press again to resume playback. |
| Folder Access | Folders can be found by pressing Folder Up or Folder Down. About one second after the folder name is displayed, the first file under the selected folder will be displayed and playback will begin. |
| Repeat | Press RPT to toggle between the following options:
|
| Random | Press RDM to play tracks in random order; press again to cancel the RDM function. |
| Intro | Press INT to play the first 10 seconds of each track; press again to cancel the INT function. |
RGB Color Operation
| Dimmer | Press DIM to adjust the dimmer level for the buttons and LCD, and turn the volume knob left or right to select HIGH (default)/MID/LOW. |
| Quick Preset Color | Press the volume knob while the dimmer level is being displayed to select one of 7 preset colors. |
| Setting the Color Mode | Press and hold the volume knob for more than two seconds to enter the color setting menu. Turn the volume knob left and right to select Color Auto (default)/Preset/Custom/Flash mode. Press and hold the volume knob for more than 2 seconds again to enter each color mode. |
| Auto Color | Set the unit to rotate between all illumination colours automatically. |
| Preset Color | Select one of the 7 colours (Blue/Green/Red/Yellow/Violet/Cyan/White). |
| Custom Color | Adjust each red, green and blue in the range of 0-32 to customise your colors for over 32K combination. Note: Adjusting each red, green and blue level to 0 will turn off all the lights on the LCD and buttons. To turn the lights back, press DIM and change the color again in the color setting. |
| Flash Color | Select one out of six different color and flash effect lights or turn it off. Flash lights will be demonstrated for about 30 seconds, and back to setting mode. The adjusted color will be flashed when there is an incoming Bluetooth call. |
Bluetooth Operation
| Preparation | Before using a Bluetooth device, it must be paired and connected. Ensure that Bluetooth is activated on your device before beginning the pairing process. |
| Pairing a New Device | The head unit broadcasts the pairing signal constantly when no devices are connected. Complete the pairing sequence from your Bluetooth device. Refer to the owner's manual for your device for more details. The device name is "Jensen Media Player" Note: The head unit can be in any mode of operation when pairing is performed. |
| Streaming Audio Troubleshooting | The head unit supports A2DP wireless streaming audio from a Bluetooth mobile device directly to your head unit. The following functions can be used to control the music:
|
Jensen J-Link P2 App Operation
The Jensen J-Link P2 Smart App is the ultimate remote control for your receiver. Change the mode, station, song, volume, and settings directly from your smartphone without being in the receiver's line of sight.
Download the Jensen J-Link P2 Smart App from Apple App Store or Google Play Store and install it on your smartphone or tablet (QR code download link on the right).


Voice Activation
Bluetooth should be paired between your smartphone and the receiver. Press the voice activation button, and the receiver will switch into Bluetooth mode, This will activate Siri or Google Assistant on your smartphone. You will need to manually switch back to the previous or desired mode once this operation is terminated.
Front 3.5mm Aux Input
Connect an optional audio source into the 3.5mm (front panel) input. Select Auxiliary input from the Main Menu to listen to audio. Adjust volume on the external audio source as needed (if connected to the headphone output of the device).
Limited One Year Or Two Year Warranty
For more information and for the location of the nearest authorised service centre please contact us by one of the following methods:
- Call us toll-free at (888) 921-4088
- E-mail us at cs@jensenmobile.com
Specifications
| FM Tuner | Tuning range: 87.5MHz-107.9MHz Usable sensitivity: 8.5dBf 50dB quieting sensitivity: 10dBf Stereo separation @ 1kHz: >30dB Frequency response: 30Hz-13kHz |
| AM Tuner | Tuning range: 530kHz-1710kHz Usable sensitivity: <42dBu Frequency response: 30Hz-2.2kHz |
| General | Speaker output impedance: 4~8 ohms Line output voltage: 2 Volts RMS Dimensions: 7" x 3.8" x 2" (178 x 97 x 50 mm) |
Design and specifications subject to change without notice.
CEA-2006 Power Standard Specifications
(reference: 14.4VDC +/- 0.2V, 20Hz~20kHz)
Power Output: 16 Watts RMS x 4 channels at 4 ohms and < 1% THD+N
Signal to Noise Ratio: 75dBA (reference: 1 watt into 4 ohms)
Troubleshooting
| Problem | Cause | Action |
Unit will not turn on/no power | Yellow wire not connected or incorrect voltage Red wire not connected or incorrect voltage | Check connections for proper voltage (11~16VDC) |
| Black wire not connected | Check connection to ground | |
| Fuse blown | Replace fuse | |
Unit has power but no sound | Speaker wires not connected | Check connections at speakers |
| One or more speaker wires touching each other or touching chassis ground | Insulate all bare speaker wires from each other and chassis ground | |
Unit blows fuses | Yellow or red wire touching chassis ground | Check for pinched wire |
| Speaker wires touching chassis ground | Check for pinched wire | |
| Incorrect fuse rating | Use fuse with correct rating | |
NO FILE appears on display | No playable MP3 files found on the device | Check the device for valid MP3 files |
NO SUPPORT appears on display | An invalid ID3 tag version is present | Version 1.0 to 2.0 ID3 tags are supported. |
Customer Support
1-888-921-4088
(Monday-Friday, 9AM-5PM EST)
Visit https://www.jensenmobile.com
References
Download manual
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Jensen MPR2121 - Mechless Receiver Manual


button to turn the unit on. Press
or TUNE
to seek to the previousor next strong station.
to temporarily stop USB playback. stop USB playback.
to skip to the next available audio track.
to skip to the previous audio track.
to toggle between play and pause during playback. 