1. Introduction
This manual provides instructions for the ALLIMITY SX RCU 03 replacement remote control. This remote is designed to function with various Octagon SX Series receivers without requiring complex programming. Please read this manual carefully to ensure proper use and to maximize the functionality of your remote control.
Compatible Models:
- Octagon SX88, SX88+, SX88+ SE S2, SX88+ SE WL S2, SX88+ SE C/T2, SX88+ SE WL C/T2
- Octagon SX87 S2, SX87WL S2
- Octagon SX89 S2, SX89 WL
- Octagon SX887, SX887 WL, SX888, SX889, SX889WL
- Octagon SX88 Optima, SX88 Optima combo
- Octagon SF8008
2. Setup
2.1 Battery Installation
The ALLIMITY SX RCU 03 remote control requires two AAA batteries (not included) for operation.
- Locate the battery compartment cover on the back of the remote control.
- Press down on the tab and slide the cover off.
- Insert two AAA batteries, ensuring the positive (+) and negative (-) terminals align correctly with the markings inside the compartment.
- Slide the battery compartment cover back into place until it clicks securely.
The remote is ready for use immediately after battery installation for compatible Octagon SX Series receivers.

Image 1: Front view of the ALLIMITY SX RCU 03 remote control, showing all buttons and layout.
3. Operating the Remote Control
The ALLIMITY SX RCU 03 remote control is designed to replicate the functions of your original Octagon SX Series remote. No programming is required for basic receiver functions; simply insert batteries and point the remote at your receiver.
3.1 Button Functions Overview
The remote features standard buttons for TV control and receiver functions. Refer to Image 1 for button layout.
- Power (Red Button): Turns the receiver on or off.
- TV Control Section (Blue Buttons): VOL-, VOL+, SET, TV/AV. These buttons are typically used for basic TV functions and may require the learning function for full compatibility with your television.
- Number Buttons (0-9): For direct channel selection.
- Navigation Cluster (OK, Arrows): Used to navigate menus and confirm selections.
- Menu: Accesses the main menu of the receiver.
- Exit: Exits current menu or screen.
- VOL+/VOL-: Adjusts receiver volume.
- CH+/CH- (Page+/Page-): Changes channels or navigates pages.
- F1, F2, F3, F4 (Color Buttons): Function buttons, their specific use depends on the receiver's software or current menu.
- Media Control Buttons (Play, Pause, Stop, Rewind, Fast Forward, Skip): For controlling media playback.
- Dedicated App Buttons (NETFLIX, KODI, YuTbe, WEBTV): Direct access to these applications if supported by your receiver.
- Other Buttons: INFO, AUDIO, SUBTITLE, TEXT, OPTION, IPTV, RECALL, SAT, TV/RADIO, V.FORMAT, RESOLUTION, SLEEP. These buttons provide access to various receiver features.
4. Learning Function (for TV Control)
The ALLIMITY SX RCU 03 remote control includes a learning function to program basic TV control buttons (Power, Volume, TV/AV) from your original TV remote. This allows you to control both your receiver and basic TV functions with a single remote.

Image 2: Back view of the remote control, displaying the "Learning Procedure" instructions.
Learning Procedure:
- Press and hold the "SET" key for 3 seconds until the red light illuminates brightly.
- Press the "POWER" key in the TV CONTROL area. The red light will flash slowly.
- Keep your original TV remote's IR emitter facing the ALLIMITY remote's IR emitter (within 3cm distance). Press the "POWER" key on your TV remote 3 times. The red light will flash 3 times and then remain lit, indicating successful learning.
- To learn other keys (e.g., VOL+, VOL-, TV/AV), repeat steps 2 and 3 for each desired key.
- Press the "SET" key again to exit the learning status. The red light will turn off.
If the learning process fails, the red light may flash rapidly or turn off without flashing three times. In such cases, repeat the procedure from step 1.
5. Maintenance
5.1 Cleaning
To clean the remote control, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or wet cloths, as these can damage the surface or internal components.
5.2 Battery Replacement
Replace batteries when the remote's response becomes sluggish or stops working. Always replace both batteries at the same time with new AAA batteries. Do not mix old and new batteries, or different types of batteries.
5.3 Storage
Store the remote control in a dry place, away from direct sunlight and extreme temperatures. If the remote will not be used for an extended period, it is recommended to remove the batteries to prevent leakage.
6. Troubleshooting
- Remote not responding:
- Check if batteries are inserted correctly with correct polarity.
- Replace old batteries with new ones.
- Ensure there are no obstructions between the remote and the receiver's IR sensor.
- Make sure you are within the operating range (up to 10 meters).
- TV control buttons not working after learning:
- Repeat the learning procedure carefully, ensuring the IR emitters are closely aligned and the original remote's button is pressed firmly.
- Ensure your original TV remote is functioning correctly during the learning process.
- Some receiver functions not working:
- Verify that your receiver model is listed as compatible in the introduction section.
- Ensure the receiver is powered on and functioning correctly.
7. Specifications
| Brand | ALLIMITY |
| Model | SX RCU 03 |
| Connectivity Technology | Infrared (IR) |
| Color | Black |
| Special Feature | No programming required for receiver functions, Learning function for TV control |
| Maximum Range | 10 Meters |
| Power Source | 2 x AAA Batteries (not included) |
| Compatible Devices | Octagon SX88, SX88+, SX88+ SE S2, SX88+ SE WL S2, SX88+ SE C/T2, SX88+ SE WL C/T2, SX87 S2, SX87WL S2, SX89 S2, SX89 WL, SX887, SX887 WL, SX888, SX889, SX889WL, SX88 Optima, SX88 Optima combo, SF8008 |
8. Warranty and Support
Information regarding specific warranty terms and customer support for the ALLIMITY SX RCU 03 remote control is not available in this manual. Please refer to the product packaging or contact your retailer for details on warranty coverage and support options.
