MAX225UB - Car radio LG - Free user manual and instructions
Find the device manual for free MAX225UB LG in PDF.
| Product Type | Car Stereo (Single DIN) |
| Brand | LG |
| Model | MAX225UB |
| Dimensions (W x H x D) | 178 x 50 x 160 mm |
| Weight | 1.2 kg |
| Power Supply | 12V DC (negative ground) |
| Maximum Power Output | 4 x 50 Watts |
| RMS Power Output | 4 x 22 Watts (at 4 ohms, 10% THD) |
| Disc Playback | CD, CD-R, CD-RW |
| USB Playback | Yes (MP3, WMA, WAV) |
| AUX Input | Front 3.5 mm jack |
| Bluetooth | Version 4.2 (hands-free and audio streaming) |
| Radio Bands | AM, FM (87.5-108 MHz) |
| Preset Stations | 30 (18 FM, 12 AM) |
| Display | LCD with white backlight |
| Equalizer | Preset EQ (Pop, Rock, Classic, Jazz, Flat) |
| Remote Control | Included (wired or IR, depending on variant) |
| Safety Features | Detachable face panel, anti-theft |
| Cleaning | Use soft dry cloth; avoid solvents |
| Spare Parts | Face panel, wiring harness, mounting sleeve, screws |
| Repairability | Serviceable by LG authorized centers only |
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USER MANUAL MAX225UB LG
Please read this manual carefully before operating your set and retain it for future reference.
MAX220UB / MAX221UB / MAX225UB

Safety Information

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
dangerous voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the product.
Always operate the vehicle in a safe manner. Do not become distracted by the vehicle while driving, and always be fully aware of all driving conditions. Do not change settings, or any functions. Pull over in a safe and legal manner before attempting such operations.
WARNING: Do not install this equipment in a confined space such as a book case or similar unit.
Always operate the vehicle in a safe manner. Do not become distracted by the vehicle while driving, and always be fully aware of all driving conditions. Do not change settings,
or any functions. Pull over in a safe and legal manner before attempting such operations.
Do not use for many hours at extremely low or high temperature. (-10°C to 60°C)
To reduce the risk of electric shock, do not remove the cover or back of this product. There are no user-serviceable parts inside. Refer servicing to qualified service personnel.
To reduce the risk of fire or electric shock, do not expose this product to dripping or splashing water, rain, or moisture.
The temperature outside the unit can be extremely high. Please use the unit only after proper installation in your vehicle.
While driving, keep the sound volume at a proper level.
Do not drop it and avoid heavy impacts at any time.
This unit is for vehicles with a 12-volt battery and negative grounding. Before installing it in a recreational vehicle, lorry, or bus, check the battery voltage. To avoid shorts in the electrical system, be sure to disconnect the battery cable before beginning the installation.
This device is equipped with a portable battery or accumulator.
Safe way to remove the battery or the battery from the equipment:
Remove the old battery or battery pack, following the steps in reverse order of assembly. To prevent contamination of the environment and possible threat to human and animal health, put the old battery or battery pack in the appropriate container at designated collection points. Do not dispose of batteries or battery packs together with other waste. It is recommended that you use local, free reimbursement systems for batteries and accumulators. The battery shall not be exposed to excessive heat such as sunshine, fire, or the like.
Table of Contents
1 Getting Started
2 Safety Information 4 Front panel 4 Remote control (Optional) 5 - Battery Installation
2 Connecting
5 Installation 5 - Basic Installation 5 - Removing the existing receiver unit 5 - ISO-DIN Installation 6 About detachable control panel 7 Connection 7 - Connecting to a car
3 Operating
8 Operation 8 - Basic operations 8 - Turning off the sound temporarily 8 - Using EQ (Equalizer) 8 - Using 3D SOUND
8 - Checking the clock 8 - Turning off the display light 8 - Resetting the unit 8 - Adjusting the general settings 9 Listening to music from an external device 9 - Preventing radical changes in volume when switching sources
9 Listening to the radio
9 - Storing desired frequencies manually
10 - Listening to a preset station
10 - Adjusting TUNER settings
11 Using an USB device
11 - Pausing or restarting USB playback
11 - Searching for a section within a file
11 - Skipping to another file
11 - Moving to another MP3/WMA file/folder
11 - Checking information about your music
11 - Playing back files in a way you want
11 - Moving to another drive
11 - Quick search of a desired file
11 - Playable USB device Requirement
4 Troubleshooting
12 Troubleshooting
5 Appendix
13 Specifications

Front panel
1 SRC /· OFF
- When pressed, selects function sources. - When pressed and held, powers the unit on or off.
2 >||
Plays and pauses playback. MUTE Temporarily stops the sound.
3 PRESET/LIST/ENTER
(Volume knob) - Adjusts volume level. - Confirms settings. - Checks files or preset stations.
4 DISP
Press to check the clock time. Press and hold to turn the display window and LED button lights on/off.
5 BAND
- Selects a band in Tuner mode. - Moves to the next USB drive. • TA (Optional) - Searches for stations with TA/TP information when pressed and held.
6 Remote Sensor (Optional)
7 Display window
8 USB port

Returns to the previous step.
10 |<>|
Skip / Search / Seek / Tune
11 · MENU
Activates setting menu. FUNC In each mode, sets playback items.
12 ∧/∨
- Moves to the previous or next preset station in TUNER
- Moves 10 MP3 / WMA files backward or forward if there is no folder or one folder on an USB. - Moves to the previous or next folder if there are more than 2 folders on an USB.
13 EQ·3D
Improves sound quality. - When pressed, selects the 1Q function. - When pressed and held, selects the 3D SOUND function.
14
Opens the front panel.
15 AUX
If connected to other portable player, you can enjoy music from it on the unit.
Remote control (Optional)
1 SRC / · OFF
- When pressed, selects function sources. - When pressed and held, powers unit off.
2 FUNC
When pressed, sets playback items in each mode. - MENU When pressed and held, activates setting menu
3 BAND
Selects a band in Tuner mode. DRV Moves to a next USB drive.
4 ▶/Ⅱ Plays or pauses playback.
5 SHF Shuffles playback.
6 MUTE Temporarily stops the sound.
7 VOLUME A / V
Adjusts volume level.



Skip / Search / Seek / Tune

Returns to the previous step.

- List up / down
- Adjusts settings.
- Moves 10 MP3 / WMA files
backward or forward if there is no
folder or one folder on an USB.
- Moves to the previous or next
folder if there are more than 2 folders
on an USB
ENTER / LIST
- Confirms the settings.
- Checks files or preset stations.
DISP
- Press it, you can check the clock
time.
- Press and hold it, you can turn on/
off the display window and the light
of LHD buttons.

Repeats playback.

Intro scan.
12 Numeric buttons (1 to 6)
Selects a numbered preset station in
TUNER.
Battery Installation Type 1
Type 2
Note
- Use only one CR2025 (3 V) lithium battery.
- Remove the battery if the remote control is not used for a long period of time.
- Do not leave the product in a hot or humid place.
- Do not handle the battery with metallic tools.
- Do not store the battery with metallic materials.
Installation
Basic Installation
Before installing, make sure that the ignition-switch is set to OFF and remove the terminal of the car battery to avoid short-circuiting.

Control panel
- Remove the existing receiver unit.
- Make the necessary connections.
- Install the installation sleeve.
- Install the unit into the installation sleeve.
Removing the existing receiver unit
If there is already an installation sleeve for the receiver unit in the dashboard, it must be removed.

- Remove the rear support from the unit.
- Remove the control panel and trim ring from the unit.
- Insert the lever into the hole on one side of the unit. Perform the same operation on the other side and pull the unit out from the mounting sleeve.
ISO-DIN Installation
Control panel
- Slide the unit into the ISO-DIN frame.
- Fit screws removed from the old unit.
- Slide the unit and frame into the dash opening.
- Install the dash panel or adapter plate. (According to models, this step may not be needed.)
- Install the trim ring to the unit.
- Install the control panel to the unit.
Connecting
About detachable control panel
Attaching the control panel

- Align the left side of the panel with the stopper. 2. Push the right side of the panel into the unit until it clicks.
Caution
- The control buttons may not work properly if the control panel is not attached properly. If this occurs, gently press the display.
- Do not leave the control panel in any area exposed to high temperatures or direct sunlight.
- Do not drop the control panel or otherwise subject it to strong impact.
- Do not allow such volatile agents as benzine, thinner, or insecticides to come into contact with the surface of the control panel.
Detaching the control panel
- Press the 🔒 to open the control panel.

- Lift the control panel slightly.
- Push the control panel to the right.

- Pull the control panel out of the unit.
- Put the detached control panel into the protective case.

Note
Periodically wipe the contacts on the back of the control panel with a cotton swab moistened with alcohol. For safety, turn off the ignition before cleaning, and remove the key from the ignition switch.



Connection
Connecting to a car
Before installing, make sure that the ignition switch is set to OFF and remove the terminal of the car battery to avoid short-circuiting.

Operation
Basic operations
- Turn the unit on by pressing any key on the unit.
- Select a source by pressing SRC.
- Rotate the volume knob to adjust the volume on the unit. Or press VOLUME +/- on the remote control.
Turning off the sound temporarily
- Press MUTE to mute your unit. Or press MUTE on the remote control.
- Press it again to cancel.
Using EQ (Equalizer)
EQ is to increase or decrease the signal strength of audio frequencies. The function helps you to enjoy sound more plentifully.
Press EQ on the unit repeatedly. The indicator lights up in the following order.
B-BOOST (BASS BOOSTER) → POP → CLASSIC → ROCK → JAZZ → VOCAL
→ SALSA → SAMBA → REGGAE → RUSSY → USERT → USIR2 → Off (Not displayed)
Using 3D SOUND
This mode delivers outstanding surround sound.
- Press and hold EQ·3D.
- Press and hold it again to cancel.
Note
- 3D SOUND is only available when you use the USB.
Checking the clock
- Press DISP
- Press it again to cancel
Turning off the display light
- Press and hold DISP
- Press and hold it again to turn it on.
Note
Under the light-off condition, press any key, the light is turned on and then off automatically if you don't press it within a few seconds.
Resetting the unit
You can reset the unit when it does not operate properly.
- Detach the control panel. Refer to page 6 for detaching the control panel.
- Press the RESET hole with a sharp object.

Adjusting the general settings
You can adjust [SOUND], [LIGHT] and [OTHER] settings.
On the unit
- Press and hold • MENU.
- Rotate the volume knob to select [SOUND], [LIGHT], or [OTHER] and press it.
- Rotate the volume knob to select the item and press it.
- Rotate the volume knob clockwise or counterclockwise to adjust the level.
- Press the volume knob to confirm the setting.
If you want to return to the previous
step, press
On the Remote Control
- Press and hold FUNC / · MENU
- Press ▲ / ▼ to select [SOUND], [LIGHT], or [OTHER] and press ENTER.
- Press ▲ / ▼ to select the mode and press ENTER.
- Press ▲ / ▼ to adjust the level.
- Press ENTER to confirm the setting. If you want to return to the previous
step, press
For [SOUND] setting
You can adjust sound quality by adjusting the level BA (left/right speaker), FAD (front/rear speaker), SW (Subwoofer), SW-F (Subwoofer frequency), A-EQ (Auto EQ). - When you set the EQ to USER 1/2 mode. - You can adjust the level of BAS (bass), MID (middle), TRB (treble).
- SW (Subwoofer, MAX221UB only) You can adjust the volume of subwoofer.
- SW-F (Subwoofer frequency, MAX221UB only) OFF/SW 55 Hz/SW 85 Hz/SW 120 Hz You can enable the subwoofer.
- A-EQ (Auto EQ) OFF/ON AUTO EQ operates only in the music file supported with genre in the device. When you set AUTO EQ to ON, POP, CLASSIC, ROCK, or JAZZ is automatically selected according to the music genre.
![LG MAX225UB - For [SOUND] setting - 1](/content/2026/06/1377055/images/e9ad030070897090e54e0bbf9cb11d7266c1f30525c5f4587089fdf8b9810a9e.jpg)
For [LIGHT] setting
You can adjust the light effects by adjusting DIM, or DIM I.V.
- DIM (Dimmer) OFF / ON : You can change the brightness of the display window during the power-on status.
| Settings Description |
| DIM ON The display window becomes dark. |
| DIM OFF The display window becomes bright. |
- DIM LV (Dimmer Level): When you set DIM to ON, you can adjust the dimmer level. (-2,-1,0,+1,+2)
For [OTHER] setting
- AUX (Auxiliary) ON / OFF It is possible to use auxiliary equipment with this unit. Activate the auxiliary setting when using auxiliary equipment connected to this unit.
- DEMO OH / ON You can change the initial indication on the display to information name (function name, EQ name, etc...) while listening to a source.
- BEEP 2ND / ALL BEEP 2ND: The beep is generated when a key is pressed for longer than 2 seconds. BEEP ALL: The beep is generated when any key is pressed.
- CLK (Clock)
For the model RDS is not supported unit or even for a RDS supported unit.
- When RDS CT information is not received and then you set CT to OFF, you can adjust the time by yourself. Set the clock as follows;
- Select a source to TUNER.
- Press FUNC to select CT, then set CT to OFF. (Refer to 'Adjusting TUNER settings' on page 10 for setting CT (Clock Time) ON/OFF.)
- Press and hold MENU on the unit to select [OTHER], then select CLK by rotating the volume knob.
- Set the hour by rotating the volume knob.
- Press the volume knob to confirm the hour.
- Set the minute by rotating the volume knob.
- Press the volume knob to confirm the minute.
- When RDS CT information is received, the clock is displayed according to the RDS CT information.
- When RDS is not supported, set the clock according to steps 3 to 7.
Listening to music from an external device
- Connect an external device to the AUX jack using a line input cable.
- Select AUX as the source.
- Play the connected auxiliary equipment.
Preventing radical changes in volume when switching sources
Only when you set AUX to ON when switching sources, you can adjust the volume level of each source to prevent radical changes in volume by selecting GAIN 0/+6.
- Press FUNC on the unit. Or press FUNC / • MINU on the remote control.
- Rotate the volume knob on the unit. Or press ▲ / ▼ on the remote control to set the option. (GAIN 0 / +6)
- Press the volume knob on the unit. Or press ENTER on the remote control to confirm the setting.
- If you want to return to the previous step, press ↗. Or press ↙ on the remote control
Listening to the radio
- Press SRC repeatedly to select a source to TUNER.
- Press BAND repeatedly to select a desired band.
- For manual search, press and hold |<</>>| on the unit until "MANUAL" is displayed. Then press it repeatedly to select a desired frequency. Or press and hold ◀◀/▶▶ on the remote control.
For auto search, press |<</>>| on the unit. Then "SEARCH" is displayed. (Except MW) Or press ◀◀/▶▶ on the remote control.
Storing desired frequencies manually
- Press BAND to select a desired band you want to store.
- Select the desired frequency by using |<</>>| on the unit Or use ◀◀/▶▶ on the remote control.
- Press the volume knob and rotate it to select a preset station among 1 to 6, then press and hold the volume knob until a beep sound is heard.
Or press and hold one of the preset buttons (1 to 6) on the remote control until a beep sound is heard.
- Repeat steps 1 to 3 to preset other stations.

Note:
When a station is stored on a preset number that already has a station of the same band, the previously preset station is automatically erased.
Listening to a preset station:
- Press BAND repeatedly to select the desired band.
- Press the volume knob on the unit, or press ENTER on the remote control.
- Rotate the volume knob to select a preset station, or press ▲/▼ on the remote control.
- Press the volume knob, or press ENTER on the remote control, or
Press BAND and then press the desired preset button (1 to 6) on the remote control.
Or press A/V on the unit to move to the previous or next preset station.
Adjusting TUNER settings
On the unit
- Press FUNC.
- Rotate the volume knob to select an item and press it.
- Rotate the volume knob to set the option and press it.
- If you want to return to the previous step, press ↗.
On the Remote Control
- Press FUNC /·MENU.
- Press ▲ /▼ to select an item and press ENTER.
- Press ▲ / ▼ to set the option and press ENTER.
- If you want to return to the previous step, press ↻
- PTY (Program type, RDS (OPTIONAL)) It searches the radio stations by program type of FM tuner.
The program types are displayed as follows.
| NEWS FINANCE EASY M | |
| AII FAIRS CHILDRIEN LIGHT M | |
| INFO SOCIAL CLASSICS | |
| SPORT RELIGION OTHER M | |
| EDUCATE PHONE IN JAZZ | |
| DRAMA TRAVEL COUNTRY | |
| CULTURE LEISURE NATION M | |
| SCIENCE DOCUMENT OLDIES | |
| VARIED POP M FOR K M | |
| WEATHER ROCK M | |
• A/S (Auto Store) The six strongest broadcasting frequencies will be stored under preset button 1 to 6 in the order of their signal strength. To cancel, press the volume knob. - P / S (Preset scan) Each preset station appears. To cancel, press the volume knob. • SENS (Tuner sensitivity) MID / HI / LOW In an area in which signal reception is weak, it helps the tuner to search more stations. The weaker the reception is, the lower option you should set to.
RDS (OPTIONAL)
- AF (Alternative frequency) ON/OFF When the reception quality drops, the tuner automatically changes to another station in the network, broadcasting a better reception quality, using the PI and AF codes.
- REG (Region) ON / OFF REG ON: The unit switches to another station, within the same network, broadcasting the same program when the receiving signals from the current station become weak. REG OFF: The unit switches to another station, within the same network when the receiving signals from the current station become weak. (In this mode, the program may differ from the one currently received.) • TA (Traffic Announcement) ALARM / SEEK
TA ALARM: When the tuned station has no TP information for 5 seconds, a double beep sound is output.
TA SEEK: When the tuned station does not receive TP information for 5 seconds, the receiver returns to the next station that has the TP information.
- PI (Programme Identification) SOUND / MUTE PI SOUND: When the frequency of a tuned station switches to an AF (Alternative frequency) with an unidentified PI, it keeps the sound. PI MUTE: When the frequency of a tuned station switches to an AF with an unidentified PI, it mutes the sound until the PI is identified.
- CT (Clock Time) ON/OFF You can use the RDS CT information to update the time. When RDS CT information is not received and then you set CT to OFF, you can adjust the time by yourself. Refer to the page 9 for setting the clock.
2017



Using a USB device
- Open the USB cover.
- Connect the USB device.
- Press SRC repeatedly to select a source to USB.
Pausing or restarting USB playback
Press \gg 11 on the unit to pause playback. Or press ▶/Ⅱ on the remote control. 2. Press it to resume playback.
Searching for a section within a file
- Press and hold |<</>>| on the unit for about 1 second during playback. Or press and hold ◀◀/▶▶ on the remote control.
- Press >|| on the unit at the point you want.
Or press ▶/Ⅱ on the remote control.
Skipping to another file
Press |<</>>| on the unit.
Or press ◀◀ / ▶▶ on the remote control.
control.

Note
To skip to the previous file, press briefly I<< within 3 seconds of playing time.
Moving to another MP3/WMA file/folder
Press A/V on the unit.
Or press ▲ /▼ on the remote control.
- Moves 10 MP3 / WMA files backward or forward if there is no folder or one folder on a USB. - Moves to the previous or next folder if there are more than 2 folders on a USB.
Moves forward if there is no folder or one folder on a USB. Moves to the previous or next folder if there are more than 2 folders on a USB.
Checking information about your music
MP3 / WMA files often come with tags. The tag gives the Title, Artist or Album.
Press DISP repeatedly during MP3 / WMA file playback. If there is no information, 'NO TEXT' will be shown in the display window.
Playing back files in a way you want
For using applicable buttons
- Press INT / RPT / SHF
- Press it again to cancel.
Or
Using the FUNC button
On the unit
- Press FUNC.
- Rotate the volume knob to select an item and press it.
- Rotate the volume knob to select the option.
- Press the volume knob to set the option. If you want to return to the previous step, press ↗.
On the Remote Control
- Press FUNC /·MENU.
- Press ▲ /▼ to select an item and press it.
- Press ▲ / ▼ to select the option.
- Press ENTER to set the option. If you want to return to the previous step, press ↻.
• RPT (Repeat) The current selected file (1 RPT) or files in the current selected folder (■ RPT) is played repeatedly. - SHF (Shuffle)
All files (SHF) or each files in the current selected folder (■ SHF) are played randomly. During random playback, even if you press I<<, you won't go back to the previous file. - INT (Intro Scan) The first 10 seconds of all files (INT) or each files in the current selected folder (■ INT) are played.
Moving to another drive
When connecting this unit to multi reader, press BAND on the unit (or DRV on remote control) to go the next drive. Each time you press the button, the driver modes change.
Quick search of a desired file
- Press the volume knob on the unit. Or press ENTER on the remote control.
- Rotate the volume knob on the unit to select a desired ROOT or folder and press it.
Or press ▲ / ▼ and press ENTER on the remote control.
- Rotate the volume knob on the unit to select a desired file and press it.
Or press ▲ / ▼ and press ENTER on the remote control.
Playable USB device requirements
- Do not extract the USB device during operation (play, etc.).
- A USB device which requires additional program installation when connected to a computer is not supported.
- Regular backup is recommended to prevent data loss.
- If you use a USB extension cable, USB hub, USB multi-reader, or external HDD, the USB device may not be recognized.
- When you connect a partitioned USB device to the unit, only the first partition is recognized.
- Some USB devices may not work with this unit. Digital cameras and mobile phones are not supported.
- The USB port of the unit cannot be connected to a PC. The unit cannot be used as a storage device.
- Using the NTFS file system is not supported. (Only FAT (16/32) file system is supported.)

Troubleshooting 12
Troubleshooting
| Symptoms | Cause Solution | |
| Power doesn't turned on.The unit doesn't operate. | Leads and connectors are not properly. Confirm once more that all connections are correct. | |
| The fuse is blown. | Rectify the problem that caused the fuse to blow, and then replace it. Be very sure to install the correct fuse with the same rate. | |
| Noise and other factors are causing the built in microprocessor to operate incorrectly. | Turn the unit off and then on again. | |
| No sound is heard. Cables are not connected correctly. Connect the cables correctly. | ||
| There's audio skipping. This unit is not firmly secured. Secure this unit firmly. | ||
| Radio stations cannot be tuned in. The signal strength of the stations is too weak (When tuning in with automatic tuning.) | Tuned in the stations manually. | |
| No station has been preset or preset stations have been cleared. (When tuning by scanning preset stations.) | ||
| The unit does not operate correctly even when the appropriate remote control buttons are pressed. | Battery power is low. Load a new battery. | |
Appendix 13
Specifications
General
Output Power: 53 W x 4 CH (Max.)
Power Source: DC 12V
Speaker impedance: 4 Ω
Ground System: Negative
Dimensions (W x H x D): (178 x 50 x 168)
mm (without Control Panel)
Net Weight: 0.97 kg
TUNER
FM Tuning Range:
87.5 MHz to 108.0 MHz
S/N Ratio: 55 dB
Distortion: 0.7%
Usable Sensitivity: 12 dBμV
AM (MW) Tuning Range:
(520 to 1720) kHz or (522 to 1670) kHz
S/N Ratio: 50 dB
Distortion: 1.0%
Usable Sensitivity: 28 dBμV
AUX
Frequency Response: 20 Hz to 20 kHz
S/N Ratio: 80 dB
Distortion: 0.1%
Channel Separation (1 kHz): 45 dB
Max Input Level (1 kHz): 1.1 V
USB
Version: USB 1.1 or USB 2.0 Full Speed
Bus Power Supply (USB)
DC 5V---1.5A
Line OUT (Optional)
Frequency Response: 20 Hz to 20 kHz
Output Voltage: 2 V (Max.)
Subwoofer (Optional)
Frequency Response: 20 Hz to 120 Hz
Output Voltage: 2 V (Max.)
- Design and specifications are subject to change without notice.
