Roland JC-90 Owner's Manual

Pages 10

Year 1997

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Roland JC-90 Specification

The Roland JC-90 Jazz Chorus amplifier is a compact, high-performance unit designed for musicians seeking pristine clean tones and signature chorus effects. It features a dual-channel configuration, providing both clean and distortion options. Each channel is equipped with independent volume controls, allowing for seamless blending of clean and overdriven sounds.

The JC-90 is powered by a robust 80-watt stereo amplifier, driving two 10-inch custom speakers that deliver a rich, full-bodied sound. Its stereo output is ideal for achieving a wide soundstage, making it suitable for both small venues and studio settings. The amplifier's hallmark is the renowned Roland chorus effect, which offers depth and dimension to the sound. This effect is complemented by a reverb feature, providing a lush, ambient layer to the audio output.

The control panel is user-friendly, featuring a three-band EQ that allows precise tonal shaping. Additionally, the JC-90 includes a bright switch, enhancing the clarity and presence of the high frequencies. For connectivity, the amplifier offers a variety of input and output options, including stereo line out, headphone jack, and effects loop, accommodating a range of external devices and pedals.

Constructed with a durable cabinet and a classic black finish, the JC-90 combines reliability with aesthetics. Its relatively lightweight design ensures portability without compromising on sound quality. Overall, the Roland JC-90 is celebrated for its clean sound, versatile effects, and solid build, making it a go-to choice for guitarists who prioritize tonal clarity and reliability in their performance gear.

Roland JC-90 F.A.Q.

How do I connect my Roland JC-90 to an effects pedal?

To connect an effects pedal to the Roland JC-90, use a standard 1/4-inch instrument cable. Connect one end to your guitar and the other to the input of the effects pedal. Then, use another 1/4-inch cable to connect the output of the pedal to the input of the amplifier.

What is the best way to clean the exterior of my Roland JC-90 amplifier?

To clean the exterior of your Roland JC-90, use a soft, dry cloth to wipe down the surfaces. For stubborn dirt, slightly dampen the cloth with water. Avoid using any solvents or alcohol-based cleaners as they can damage the finish.

Why is my Roland JC-90 producing a humming noise?

Humming noises can be caused by several factors, including electrical interference, grounding issues, or faulty cables. Ensure all cables are properly connected and try using a different power outlet. If the problem persists, consider checking your cables for damage.

How can I replace a blown fuse in my Roland JC-90?

To replace a blown fuse, first unplug the amplifier. Locate the fuse holder on the back panel and gently remove the blown fuse. Replace it with a new fuse of the same rating and type. Do not use a fuse with a higher rating.

What should I do if the reverb on my Roland JC-90 is not working?

First, check that the reverb knob is turned up and that all cables are securely connected. If the problem persists, inspect the reverb tank connections inside the amp. If you're not comfortable doing this, consider taking the amp to a professional technician.

Can I use my Roland JC-90 with a bass guitar?

While primarily designed for electric guitars, the Roland JC-90 can be used with a bass guitar for practice. However, be cautious at high volumes as the speakers are not optimized for bass frequencies, which could potentially cause damage.

How do I properly store my Roland JC-90 when not in use?

Store your Roland JC-90 in a cool, dry place. Cover it with a dust cover or cloth to prevent dust accumulation. Ensure the amplifier is unplugged and keep it away from direct sunlight and moisture to extend its lifespan.

What are the steps to achieve a clean jazz tone on the Roland JC-90?

To achieve a clean jazz tone, set the EQ to emphasize mid and bass frequencies. Keep the treble at a moderate level and the reverb at a low setting. Adjust the volume to suit your playing environment while maintaining clarity.

How can I troubleshoot if my Roland JC-90 won’t turn on?

If your Roland JC-90 won't turn on, first check the power cable and ensure it is securely connected to both the amp and the power outlet. Check the fuse and replace it if necessary. If the amp still doesn't power on, consult a professional technician.

What maintenance is recommended for the Roland JC-90 to keep it in good condition?

Regularly clean the exterior with a dry cloth, inspect cables for wear, and periodically check the amplifier's connections. Have a professional technician service the amp every few years to ensure optimal performance.