Introduction
This manual provides instructions for the proper use and maintenance of your WTTHAI RM-SC3 replacement remote control. This remote is designed to be compatible with various Sony Mini Hi-Fi Stereo Systems, offering full functionality for your audio equipment.
Product Overview

This image displays the front of the RM-SC3 remote control, highlighting its button layout and ergonomic shape.
The RM-SC3 remote control is a replacement unit designed for specific Sony Mini Hi-Fi Stereo Systems. It features a gray ergonomic design with clearly labeled buttons for various functions, ensuring ease of use.
Setup
Battery Installation
The RM-SC3 remote control requires two 1.5V AAA alkaline batteries (not included).
- Locate the battery compartment on the back of the remote control.
- Slide open the battery compartment cover.
- Insert two AAA batteries, ensuring correct polarity (+ and -) as indicated inside the compartment.
- Close the battery compartment cover securely.
No programming or setup is required; the remote is ready for use once batteries are installed.
Operating Instructions
The RM-SC3 remote control provides full access to all original functions of your compatible Sony Mini Hi-Fi Stereo System. Point the remote directly at the system's infrared receiver for optimal performance.
Button Functions
| Button | Function |
|---|---|
| I/O (Power) | Turns the stereo system on or off. |
| SLEEP | Activates or deactivates the sleep timer function. |
| DISPLAY | Changes the information displayed on the system's screen. |
| CLOCK/TIMER, SELECT, SET | Used for setting the clock and timer functions. |
| TUNER MEMORY | Stores or recalls radio station presets. |
| PLAY MODE/TUNING MODE | Selects playback modes (e.g., repeat, shuffle) or tuning modes for the radio. |
| REPEAT/FM MODE | Toggles repeat playback or switches FM radio modes. |
| TAPE, CD, TUNER, FUNCTION | Selects the audio source (Tape, CD, Tuner) or cycles through available functions. |
| REWIND, FAST FORWARD, PLAY, PAUSE, STOP, SKIP | Standard media playback controls for CD and Tape functions. |
| CLEAR | Clears entries or selections. |
| ENTER | Confirms selections. |
| EQ | Adjusts equalizer settings. |
| VOLUME (+/-) | Increases or decreases the audio volume. |
| DISC SKIP | Skips to the next or previous disc in a multi-disc changer. |
| ALBUM (+/-) | Navigates between albums or folders on compatible media. |
Maintenance
- Clean the remote control regularly with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Avoid exposing the remote to extreme temperatures, humidity, or direct sunlight.
- If the remote will not be used for an extended period, remove the batteries to prevent leakage.
Troubleshooting
If the remote control does not operate correctly, refer to the following troubleshooting steps:
Problem: Remote control does not respond.
- Check if the batteries are inserted correctly with the correct polarity.
- Replace old batteries with new 1.5V AAA alkaline batteries.
- Ensure there are no obstructions between the remote control and the stereo system's infrared receiver.
- Verify that the remote control is pointed directly at the stereo system.
Problem: Only some buttons function.
- Ensure the remote is compatible with your specific Sony Mini Hi-Fi Stereo System model. Refer to the 'Compatible Models' section.
- Clean the remote control buttons and surface to remove any dirt or debris that might be interfering with button presses.
Specifications
- Brand: WTTHAI
- Model Number: RM-SC3
- Connectivity Technology: Infrared
- Power Supply: 2 x 1.5V AAA Alkaline Batteries (not included)
- Compatible Devices: Sony Mini Hi-Fi Stereo System
- Color: Gray
- Button Quantity: 26
- Item Weight: 1.76 Ounces (approximately 50g)
Compatible Models
This remote control is compatible with the following Sony Mini Hi-Fi Stereo System models:
- MHC-GX450
- LBT-ZX9
- MHC-LX10000
- HCD-LX10000
- LBT-ZX8
- HCD-ZX8
- LBT-ZX6
- HCD-ZX6
- MHC-GX555
- HCD-GX555
- MHC-GX9900
- HCD-GX9900
- MHC-GX355
- HCD-GX355
- CMT-CPX22
- HCD-CPX22
- CMT-HPX7
- HCD-HPX7
- CMT-NE5
- HCD-NE5
- CMT-GPX6
- HCD-GPX6
- CMT-HPX10W
- HCD-HPX10W
- CMT-HPX9
- HCD-HPX9
- MHC-GX750
- HCD-GX750
- MHC-GX9000
- HCD-GX9000
Warranty and Support
For product support or inquiries, please contact the manufacturer, WTTHAI, through your purchase platform.
Information regarding warranty coverage may be available from your retailer at the time of purchase.