Jensen JWM20 - User Manual

Installation and Owner's Manual
JWM20
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Summary

Introduction to Jensen JWM20

Important Precautions

Provides essential safety guidelines for using the JWM20, covering power supply, service, moisture, and cleaning.

JWM20 Installation Guide

Battery Disconnection Procedure

Instructions on safely disconnecting the vehicle battery before installation, with notes on computer memory.

JWM20 Wiring and Connections

Wiring Diagram and Pinout

Explains the wiring harness connections and provides a detailed pinout with wire colors and descriptions.

Rear Panel Connections

Basic Operation of JWM20

Audio Menu Settings

System Menu Settings

Guide to system settings including Bluetooth, Dimmer, Time format, and Reset.

HDMI Input Operation

Connecting HDMI Devices

How to connect and use HDMI devices, including supported audio formats and streaming device examples.

Tuner Operation Guide

MP3;USB Playback Operations

Media Playback Controls

Connecting and Using USB Devices

Bluetooth Operation and Pairing

Bluetooth Menu Options

Details on system settings available in Bluetooth mode: BT Device, Connect/Disconnect, Lock/Unlock, Delete.

Pairing a Bluetooth Device

Step-by-step guide to pairing a mobile device with the JWM20, including pairing password.

Care, Maintenance, and Safety

FCC Compliance and Warnings

Regulatory information regarding FCC rules, warnings on modifications, and radiation exposure limits.

Troubleshooting Common Issues

Unit Power and Operation Problems

Solutions for when the radio won't turn on or the front panel is unresponsive.

Audio and Display Issues

Troubleshooting steps for no sound, blank display, and Bluetooth connection problems.

Reception and Remote Control Problems

Solutions for AM/FM reception issues, remote control non-responsiveness, and HDMI audio loss.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The JENSEN JWM20 is a mobile audio system designed for recreational vehicles (RVs), offering a comprehensive set of features for entertainment and connectivity. It is engineered to operate with a 12-volt DC, negative ground battery system, which is standard in North American vehicles. The unit boasts a compact design with overall dimensions of 132.8mm (W) x 84.7mm (D) x 115.6mm (H) and mounting dimensions of 96.8mm (W) x 73.8mm (D) x 99.9mm (H), weighing approximately 0.35 KG.

Function Description:

The JWM20 serves as a central hub for audio entertainment in an RV. Its primary functions include:

• Digital AM/FM Tuner: Provides access to radio broadcasts with 30 preset stations (12 AM/18 FM) for quick recall.
• Bluetooth Connectivity: Enables wireless audio streaming from compatible devices via A2DP/AVRCP profiles.
• USB Playback: Supports playback of MP3/WMA files from USB mass storage devices.
• HDMI Input/Output: Features an HDMI input for connecting portable audio/video devices and an HDMI output for pass-through to a display.
• Auxiliary Audio Input/Output: Includes rear RCA auxiliary audio input and output for connecting external audio sources and sending audio to other systems.
• Subwoofer Output: Dedicated RCA output for connecting an external subwoofer.
• Multi-Zone Speaker Output: Provides two independent speaker zones (Zone A and Zone B) with a total of four speaker outputs, each delivering 4 x 6W of power. The amplifier is compatible with 4-8 Ω ohm speakers, with a 4 ohm load minimum.
• Time/Alarm Clock: Integrated clock with alarm functionality.
• Electronic Controls: Offers electronic bass, treble, balance, and fader controls for audio customization.
• Dimmable Backlit LCD Control: A liquid crystal display (LCD) panel shows frequency, time, and active functions, with adjustable backlighting for optimal visibility.
• Wireless Remote Control: Included for convenient operation from a distance.

Important Technical Specifications:

• Power Supply: DC 12 Volts, Negative Ground, Operating Voltage 10-16 VDC.
• FM Tuner:
  • Frequency Coverage (USA): 87.5 to 107.9 MHz
  • Sensitivity: <4 µV
  • Stereo Separation@1 kHz: >25 dB
• AM Tuner:
  • Frequency Range (USA): 530-1710 kHz
  • Sensitivity (S/N=20dB): <63 µV
• Amplifier Output: 4 x 6W, compatible with 4-8 Ω ohm speakers (4 ohm load minimum).
• USB Input: Supplies up to 1A of charging current.
• HDMI Input: Supports audio formats of Dolby Digital, PCM, or Stereo.

Usage Features:

• Basic Operation: Power on/off, volume control (increase/decrease), and standby mode.
• Audio Menu: Access and adjust bass, treble, balance (L7/R7), fader (R7/F7), and loudness settings. The loudness feature boosts bass/treble at low volumes.
• System Menu: Configure Bluetooth devices (lock/unlock, connect/disconnect, delete), turn Bluetooth on/off, adjust dimmer on/off and level (0-8), set preset volume (1-40), and set time display (12/24 hours). A reset option restores factory default settings.
• Tuner Operation:
  • Band Selection: Switch between FM1, FM2, FM3, AM1, and AM2 bands.
  • Manual Tuning: Step up/down through stations.
  • Auto Seek Tuning: Automatically seek the next or previous strong station.
  • Preset Stations: Store and recall up to six stations per band using numbered preset buttons.
  • Auto Store/Preset Scan (AS/PS): Automatically scan and store the strongest stations or scan through stored preset stations.
• MP3/USB Operation:
  • USB Device Connection: Connect a USB mass storage device to the front USB interface for playback. The unit displays "READING" during file loading.
  • Play/Pause: Suspend or resume playback.
  • Next/Previous File: Select the next or previous track.
  • Folder Up/Down: Navigate through higher or lower folder levels.
  • Repeat Options: Cycle through RPT ONE, RPT OFF, RPT ALL, and RPT FOLD.
  • Random Shuffle: Play files in random order.
  • Fast Forward/Reverse: Quickly navigate within a track.
• Bluetooth Operation:
  • Pairing: Initiate pairing with Bluetooth-enabled devices. The unit displays "PAIR" and counts down for 120 seconds during the process.
  • Device Management: View a list of previously paired devices, with options to lock/unlock, connect/disconnect, or delete devices. Up to 5 devices can be stored.
  • Audio Streaming (A2DP): Play songs from a connected Bluetooth device.
  • Call Handling: Bluetooth audio pauses when answering a call and may resume automatically or require manual play.
• Time Display: Alternate between playing time and clock time in various modes.
• Time Menu Setup: Configure alarm (on/off, set), sleep timer (0, 15, 30, 45, 60 minutes), and clock set.
• Speaker Output Control: Independently turn Zone A and Zone B speakers on or off.
• Remote Sensor: Infrared receiver on the front panel for remote control signals.
• Reset Button: Used for initial installation, resolving unresponsive function buttons, or clearing error symbols.

Maintenance Features:

• General Care: Keep the product dry, wipe it dry immediately if it gets wet to prevent corrosion. Protect from dust and dirt to avoid premature wear. Handle gently to prevent damage to circuit boards and cases.
• Cleaning: Clean the front panel with a slightly damp cloth. Avoid harsh chemicals, cleaning solvents, or strong detergents.
• Temperature: Use and store in normal temperature environments to prevent damage to electronic devices, batteries, and plastic parts.
• Ignition Noise Suppression: The manual addresses common ignition noise in reception, suggesting the use of radio suppression type high voltage ignition wire and suppressor resistors, or additional noise suppressors, to mitigate interference that varies with engine speed.
• Radio Interference: Acknowledges that radio reception in a moving environment differs from stationary reception. AM reception may deteriorate under bridges or near high voltage lines but can receive signals from great distances due to broadcasting signals following the earth's curvature and reflecting off the upper atmosphere.
• FCC Compliance: The device complies with FCC Class B digital device limits. Users are advised to reorient/relocate the receiving antenna, increase separation between equipment and receiver, connect to a different circuit, or consult a radio/TV technician if interference occurs. Warnings are provided against unauthorized modifications that could void user authority to operate the equipment and emphasize maintaining a minimum distance of 20cm between the radiator and the body for radiation exposure limits.

Jensen JWM20 Specifications