Introduction
This manual provides instructions for the GOUYESHO SF RCU04 Replacement Remote Control. This remote is designed as a direct substitute for original remote controls compatible with Octagon SX87, SX88, SX89, SX887, SX888, and SX889 models.
Constructed from new ABS material, the remote offers improved durability and a premium finish. Its ergonomic arc design ensures comfortable handling. Buttons are responsive and provide pleasant tactile feedback, enhancing the user experience. The remote utilizes Infrared 3.0 technology, providing a strong and responsive signal with a control distance of over 26 feet (8 meters) and a wide operating angle of over 120 degrees.

Image: The SF RCU04 replacement remote control, designed for Octagon TV models, showcasing its layout and compatibility.
Setup
Battery Installation
- Locate the battery compartment on the back of the remote control.
- Slide open the battery compartment cover.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity (+ and - terminals match the markings inside the compartment). Batteries are not included.
- Close the battery compartment cover securely.
No programming or pairing is required for basic functionality. The remote is ready for use immediately after battery installation.

Image: The back of the SF RCU04 remote control showing the battery compartment and indicating the requirement for two AAA batteries.
Learning Procedure (Optional)
The remote includes a learning function for specific keys, typically for TV control functions. Follow these steps to program specific buttons:
- Press and hold the 'SET' key on the SF RCU04 remote for 3 seconds. The red indicator light will begin to flash.
- Align the infrared (IR) emitter of your original TV remote with the IR receiver of the SF RCU04 remote (typically head-to-head, a few centimeters apart).
- Press the desired key on your original TV remote (e.g., 'POWER'). The red indicator light on the SF RCU04 will flash 3 times and then remain steadily lit, indicating successful learning.
- Repeat steps 2 and 3 for any other keys you wish to program.
- Press the 'SET' key again to exit the learning status.

Image: The SF RCU04 remote control with text indicating that no programming or pairing is needed for immediate use after battery installation.
Operating Instructions
The SF RCU04 remote control provides intuitive access to your Octagon SX series device functions. Point the remote directly at your device for optimal performance.
- Power Button: Located at the top right, turns the device on or off.
- Number Pad: Use for direct channel input or menu selections.
- Volume Control (VOL+/-): Adjusts the audio output level.
- Channel Control (CH+/-): Navigates through channels.
- Navigation Pad (Arrow Keys & OK): Used to navigate menus and confirm selections.
- Menu/Exit Buttons: Access and exit device menus.
- Special Function Buttons: Dedicated buttons for features like Info, EPG (Electronic Program Guide), TXT (Teletext), SUBT (Subtitles), TV/Radio, FAV (Favorites), and media playback controls.
The remote's infrared technology ensures precise control from a distance of up to 10 meters (33 feet), even at wide angles, providing a flexible user experience.

Image: The SF RCU04 remote control being used to control a television, illustrating its long-distance and precise control capabilities.
Maintenance
Cleaning
To clean the remote control, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the surface or internal components.
Battery Replacement
Replace batteries when the remote's responsiveness decreases or if the indicator light does not illuminate. Refer to the 'Battery Installation' section under Setup for detailed instructions on replacing the two (2) AAA batteries.
Troubleshooting
- Remote not responding:
- Ensure batteries are inserted correctly with the proper polarity.
- Replace old batteries with new 1.5V AAA batteries.
- Check for any obstructions between the remote and the device's IR receiver.
- Ensure you are within the operating range (up to 10 meters) and pointing the remote directly at the device.
- Specific buttons not working after learning:
- Repeat the 'Learning Procedure' for the problematic buttons, ensuring a clear line of sight between the original remote and the SF RCU04 during the process.
- Remote feels sluggish or unresponsive:
- This often indicates low battery power. Replace the batteries.
If your original remote control is not functioning, this replacement remote can serve as a direct substitute, provided your device is one of the compatible Octagon SX series models.
Specifications
| Feature | Specification |
|---|---|
| Brand | GOUYESHO |
| Model Number | SF RCU 04 |
| Compatible Devices | Octagon SX87, SX88, SX89, SX887, SX888, SX889 (TV Decoder, Television) |
| Connectivity Technology | Infrared (IR 3.0) |
| Color | Dark Grey |
| Special Features | Ergonomic Design |
| Max Operating Range | 10 Meters (33 Feet) |
| Power Source | 2 x AAA Batteries (not included) |
| Material | ABS |
| Number of Buttons | 10 (as per specifications, actual button count may vary based on interpretation) |

Image: Detailed view of the SF RCU04 remote control, including its dimensions for reference.
Support
For any questions regarding your order or the SF RCU04 remote control model, please do not hesitate to contact customer support directly. Customer support typically provides responses within 12 business hours.
While specific warranty information is not provided, the manufacturer is committed to product quality and compatibility.





