Brand: YAMAHA
Category: Audio/Video
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for R112/R112C
Uploaded: Nov. 21, 2025, 9:24 p.m.
Manual Publish Date: 2002-01-01
Warranty Information
Consult your Yamaha dealer for specific warranty information relevant to your region.
- Read the manual thoroughly before setup and use for maximum reliability and longevity.
- Avoid direct sunlight, extreme temperatures, high humidity, excessive dust, vibration, and unstable surfaces when installing speakers.
- Always disconnect cables before moving equipment to prevent short circuits.
- Ensure correct polarity (+/-) when connecting multiple speaker systems.
- When powering up, turn the power amplifier on last. When powering down, turn the amplifier off first.
- Turn all component power switches OFF before connecting/disconnecting cables.
- Avoid outputting distorted sounds for extended periods to prevent overheating and fire hazards.
- Be aware of potential hearing loss from high volume levels and consult an audiologist if experiencing discomfort.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
| No sound | Speaker cable loose or disconnected | Check all connections. |
| No sound | Amplifier not powered on or volume set to minimum | Power on amplifier and set volume. |
| No sound | Incorrect input selection | Select the correct input source. |
| Distorted sound | Volume too high | Reduce amplifier volume. |
| Distorted sound | Input signal is distorted | Check source equipment and adjust levels. |
| High-frequency driver not working | Poly switch activated due to over-power | Turn off power for 2-3 minutes to allow poly switch to reset. Reduce power levels. |