1. Introduction
This manual provides instructions for the ALLIMITY RC-978 replacement infrared remote control. This remote is designed to function as a direct replacement for the original remote controls of various Denon AV Receiver models, offering similar functionality and button layout.
Compatible Denon AV Receiver Models:
- AVC-1590
- AVR-1803
- AVR-1905
- AVR-1906
- AVR-785
- AVR-883

This image illustrates the ALLIMITY RC-978 replacement remote control (left) alongside the original Denon remote control (right), highlighting their similar button layouts and functions.
2. Setup
2.1 Battery Installation
- Locate the battery compartment on the back of the remote control.
- Slide the battery compartment cover downwards or outwards to open it.
- Insert two (2) new AAA alkaline batteries, ensuring the positive (+) and negative (-) terminals align correctly with the markings inside the compartment.
- Replace the battery compartment cover by sliding it back into position until it clicks securely.

The back of the remote control showing the battery compartment. Insert two AAA batteries as indicated by the polarity markings.
2.2 First Use
The ALLIMITY RC-978 is an infrared (IR) replacement remote control and typically requires no programming. Once batteries are installed, it should be ready for use with your compatible Denon AV Receiver.
- Ensure your Denon AV Receiver is powered on.
- Point the remote control directly towards the infrared sensor on your AV Receiver.
- Press any function button (e.g., Power, Volume Up) to test its operation.
3. Operating Instructions
3.1 General Operation
To ensure proper functionality, always aim the remote control directly at the infrared sensor of your Denon AV Receiver. Avoid placing obstacles between the remote and the receiver that could block the IR signal.

A clear view of the ALLIMITY RC-978 remote control, displaying all buttons and their labels for various functions.
The buttons on the RC-978 remote control correspond to the functions of the original Denon remote. Refer to your Denon AV Receiver's original user manual for detailed descriptions of specific button functions.

This image shows a user operating a home theater system with the ALLIMITY RC-978 remote control, demonstrating typical usage.
4. Maintenance
4.1 Cleaning
To clean the remote control, use a soft, dry cloth. For stubborn dirt, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Do not use harsh chemicals or abrasive materials, as these can damage the remote's surface or internal components.
4.2 Storage
When not in use for extended periods, it is recommended to remove the batteries to prevent leakage, which can damage the remote. Store the remote in a cool, dry place away from direct sunlight and extreme temperatures.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Remote is not working. | Dead or incorrectly installed batteries. | Replace batteries with new AAA alkaline batteries, ensuring correct polarity. |
| Remote has short range or intermittent response. | Weak batteries; Obstruction between remote and receiver; Remote not aimed correctly. | Replace batteries. Ensure a clear line of sight to the AV Receiver's IR sensor. Aim the remote directly at the receiver. |
| Specific buttons do not function. | Button malfunction; Receiver not in correct mode. | Ensure the AV Receiver is in the appropriate input/mode for the button's function. If problem persists, contact support. |
6. Specifications
| Feature | Detail |
|---|---|
| Model | RC-978 |
| Brand | ALLIMITY |
| Connectivity Technology | Infrared (IR) |
| Compatible Devices | Denon AV Receivers (AVC-1590, AVR-1803, AVR-1905, AVR-1906, AVR-785, AVR-883) |
| Battery Type | 2 x AAA Alkaline Batteries (not included) |
| Maximum Range | Approximately 33 feet (10 meters) |
| Dimensions (L x W x H) | 5" x 2" x 0.6" (12.7 cm x 5.1 cm x 1.5 cm) |
| Weight | 1 Ounce (approximately 28 grams) |

This image displays the physical dimensions of the ALLIMITY RC-978 remote control, measuring approximately 9.25 inches (23.5 cm) in length and 1.77 inches (4.5 cm) in width.
7. Warranty and Support
As a replacement product, the ALLIMITY RC-978 remote control is typically covered by the seller's return policy. If you encounter any issues with the product or have questions regarding its compatibility or operation, please contact the seller directly through your purchase platform for assistance.
Please provide your order number and a detailed description of the issue when contacting support to facilitate a quicker resolution.