1. Introduction
This manual provides instructions for the ECONTROLLY RC-904S replacement remote control. This remote is designed to be compatible with Onkyo Network Stereo AV Receiver models TX-8150 and TX-8140. It offers direct functionality without the need for programming or pairing.

Image 1.1: Front view of the RC-904S remote control, displaying all buttons and their labels.
2. Setup
2.1 Battery Installation
The RC-904S remote control requires two 1.5V AAA alkaline batteries for operation. Follow these steps to install the batteries:
- Locate the battery compartment on the back of the remote control.
- Slide the battery compartment cover downwards to open it.
- Insert two new 1.5V AAA alkaline 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.
Once batteries are installed, the remote is ready for use with compatible Onkyo receivers without any additional programming.

Image 2.1: Rear view of the RC-904S remote control showing the open battery compartment with two AAA batteries inserted.
3. Operating Instructions
The RC-904S remote control provides full functionality for your Onkyo Network Stereo AV Receiver. Below is a general overview of key button functions:
- Power Button (⏻): Turns the receiver on or off.
- Input Selector Buttons (BD/DVD, CBL/SAT, PC, GAME, TV/TAPE, CD, PHONO, TUNER, NET): Selects the desired audio/video input source.
- Volume Up/Down (+ / -): Adjusts the master volume level.
- Muting Button: Mutes or unmutes the audio output.
- Channel Up/Down (+ / - CH): Navigates through radio channels or presets (if applicable).
- Navigation Pad (Up, Down, Left, Right, ENTER): Used for menu navigation and selection.
- MENU / RETURN: Accesses the receiver's menu system and navigates back.
- SETUP: Enters the setup menu for receiver configuration.
- DISPLAY: Changes the information displayed on the receiver's front panel or connected display.
- DIMMER: Adjusts the brightness of the receiver's display.
- SLEEP: Sets a timer for the receiver to automatically power off.
- Playback Controls (Rewind, Play, Fast Forward, Pause, Stop, Repeat, Random): Controls playback of connected media devices.
- Number Buttons (0-9, >10, CLR): Direct input for channel numbers or other numerical selections.
- SPEAKER A/B: Toggles between speaker outputs A and B, or both.
- BLUETOOTH: Activates Bluetooth mode for wireless audio streaming.
For detailed functions specific to your Onkyo receiver model, please refer to your receiver's original user manual.
4. Maintenance
To ensure the longevity and proper functioning of your remote control, follow these maintenance guidelines:
- Cleaning: Wipe the remote control with a soft, dry cloth. Do not use liquid cleaners, abrasive pads, or chemical solvents, as these may damage the surface or internal components.
- Battery Replacement: Replace batteries when the remote's response becomes sluggish or stops working. Always replace both batteries simultaneously with new 1.5V AAA alkaline batteries.
- Storage: If the remote control will not be used for an extended period, remove the batteries to prevent leakage, which can cause damage. Store the remote in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Drops: Protect the remote from physical impact. Dropping the remote can damage internal circuitry or external casing.
5. Troubleshooting
If you experience issues with your RC-904S remote control, consult the following troubleshooting steps:
- Remote Not Responding:
- Ensure the remote has fresh 1.5V AAA alkaline batteries installed correctly (check polarity).
- Verify there are no obstructions between the remote control and the Onkyo receiver's infrared sensor.
- Confirm you are within the effective operating range and line of sight of the receiver.
- Specific Buttons Not Working:
- Check for any physical debris or stickiness around the button. Gently clean if necessary.
- If only certain buttons fail, it might indicate internal damage.
- Remote Works Intermittently:
- Batteries may be low. Replace them with new ones.
- Ensure no strong light sources (e.g., direct sunlight, fluorescent lights) are interfering with the infrared signal.
- Remote Does Not Control Receiver:
- Confirm that your Onkyo receiver model (TX-8150 or TX-8140) is listed as compatible.
- Ensure the receiver is powered on.
If these steps do not resolve the issue, contact customer support for further assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | RC-904S |
| Compatibility | Onkyo Network Stereo AV Receiver TX-8150, TX-8140 |
| Power Source | 2 x 1.5V AAA Alkaline Batteries (not included) |
| Product Dimensions | 5.91 x 1.57 x 0.59 inches (15 x 4 x 1.5 cm) |
| Item Weight | 1.41 ounces (40 grams) |
| Color | Black |
| Special Feature | Ergonomic design |
7. Warranty and Support
Specific warranty information for this replacement remote control is not provided in the product details. For any support inquiries or to obtain warranty details, please contact the seller or manufacturer directly through your purchase platform.
Manufacturer: Dengmianwen Factory
Brand: ECONTROLLY





