JC-120
Owner’s Manual
Thank you for purchasing the Roland JC-120 JAZZ CHORUS Guitar Amplifier. To
take full advantage of this amplifier, and to ensure years of trouble-free service,
please read this Owner’s Manual in its entirety.
Features
• 120 watts of output power; 2 channels of 60 watts each. Channel 2 is equipped
with Roland’s renowned chorus effect.
• Two input jacks (high-gain and low-gain) accommodate virtually any guitar.
• Both channels contain a Bright switch for greater tonal control.
•A three-spring reverb unit produces a warm, distinctive sound.
• The reinforced cabinet is designed to withstand the rigors of the road while
providing characteristic styling.
• Chorus/Vibrato, Reverb and Distortion can all be controlled by foot switches
leaving your hands free for playing.
• Channel 2 contains an effects loop circuit that allows you to select either a series or
parallel connection. Further, it provides selection of a +4 dBm or -20 dBm input
level to match the level of your effects device.
Before using this unit, carefully read the sections entitled: “IMPORTANT SAFETY
INSTRUCTIONS” (p. 2), “USING THE UNIT SAFELY” (p. 3), and “IMPORTANT
NOTES” (p. 4). These sections provide important information concerning the proper
operation of the unit. Additionally, in order to feel assured that you have gained a
good grasp of every feature provided by your new unit, this manual should be read in
its entirety. The manual should be saved and kept on hand as a convenient reference.
Copyright © 1996 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form
without the written permission of ROLAND CORPORATION.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS QUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.
INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
WARNING - When using electric products, basic precautions should always be followed, including the following:
Read all the instructions before using the product.
Do not use this product near water — for example, near a
bathtub, washbowl, kitchen sink, in a wet basement, or near
a swimming pool, or the like.
This product should be used only with a cart or stand that is
recommended by the manufacturer.
This product, either alone or in combination with an amplifier
and headphones or speakers, may be capable of producing
sound levels that could cause permanent hearing loss. Do
not operate for a long period of time at a high volume level
or at a level that is uncomfortable. If you experience any
hearing loss or ringing in the ears, you should consult an
audiologist.
The product should be located so that its location or position
does not interfere with its proper ventilation.
The product should be located away from heat sources such
as radiators, heat registers, or other products that produce
heat.
The product should be connected to a power supply only of
the type described in the operating instructions or as marked
on the product.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
A.
B.
C.
D.
E.
The power-supply cord of the product should be unplugged
from the outlet when left unused for a long period of time.
Care should be taken so that objects do not fall and liquids
are not spilled into the enclosure through openings.
The product should be serviced by qualified service
personnel when:
The power-supply cord or the plug has been damaged; or
Objects have fallen, or liquid has been spilled onto the
product; or
The product has been exposed to rain; or
The product does not appear to operate normally or
exhibits a marked change in performance; or
The product has been dropped, or the enclosure
damaged.
Do not attempt to service the product beyond that described
in the user-maintenance instructions. All other servicing
should be referred to qualified service personnel.
GROUNDING INSTRUCTIONS
This product must be grounded. If it should malfunction or breakdown, grounding provides a path of least resistance for
electric current to reduce the risk of electric shock.
This product is equipped with a cord having an equipment-grounding conductor and a grounding plug. The plug must be
plugged into an appropriate outlet that is properly installed and grounded in accordance with all local codes and ordinances.
DANGER: Improper connection of the equipment-grounding conductor can result in a risk of electric shock. Check with a
qualified electrician or serviceman if you are in doubt as to whether the product is properly grounded.
Do not modify the plug provided with the product — if it will not fit the outlet, have a proper outlet installed by a qualified
electrician.
For the USA
The product which is equipped with a THREE WIRE GROUNDING TYPE LINE PLUG must be grounded.
WARNING:
IMPORTANT:
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying
the terminals in your plug, proceed as follows:
The wire which is coloured GREEN-AND-YELLOW must be connected to the terminal in the plug which is marked by the
letter E or by the safety earth symbol or coloured GREEN or GREEN-AND-YELLOW.
The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.
THIS APPARATUS MUST BE EARTHED
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE.
GREEN-AND-YELLOW: EARTH, BLUE: NEUTRAL, BROWN: LIVE
For the U.K.
3
USING THE UNIT SAFELY
• Before using this unit, make sure to read the
instructions below, and the Owner's Manual.
.........................................................................................................................................
• Do not open or perform any internal modifica-
tions on the unit.
.........................................................................................................................................
• Make sure you always have the unit placed so it is
level and sure to remain stable. Never place it on
stands that could wobble, or on inclined surfaces.
.........................................................................................................................................
• Avoid damaging the power cord. Do not bend it
excessively, step on it, place heavy objects on it,
etc. A damaged cord can easily become a shock or
fire hazard. Never use a power cord after it has
been damaged.
.........................................................................................................................................
• In households with small children, an adult
should provide supervision until the child is
capable of following all the rules essential for the
safe operation of the unit.
.........................................................................................................................................
• Protect the unit from strong impact.
(Do not drop it!)
.........................................................................................................................................
• Do not force the unit's power-supply cord to share
an outlet with an unreasonable number of other
devices. Be especially careful when using
extension cords—the total power used by all
devices you have connected to the extension
cord's outlet must never exceed the power rating
(watts/amperes) for the extension cord. Excessive
loads can cause the insulation on the cord to heat
up and eventually melt through.
.........................................................................................................................................
• Before using the unit in a foreign country, consult
with your dealer, or qualified Roland service
personnel.
.........................................................................................................................................
• Always grasp only the plug on the power-supply
cord when plugging into, or unplugging from an
outlet.
........................................................................................................................................
• Try to prevent cords and cables from becoming
entangled. Also, all cords and cables should be
placed so they are out of the reach of children.
........................................................................................................................................
• If the unit could become a hazard if it moves, all
caster wheels should be removed once the unit has
been placed at the place of installation, or has been
loaded onto a vehicle.
........................................................................................................................................
• Never climb on top of, nor place heavy objects on
the unit.
........................................................................................................................................
• Never handle the power cord or its plug with wet
hands when plugging into, or unplugging from,
an outlet.
........................................................................................................................................
• Before moving the unit, disconnect the power
plug from the outlet, and pull out all cords from
external devices.
........................................................................................................................................
• Before cleaning the unit, turn off the power and
unplug the power cord from the outlet (p. 5).
........................................................................................................................................
• Whenever you suspect the possibility of lightning
in your area, pull the plug on the power cord out
of the outlet.
........................................................................................................................................
Used for instructions intended to alert
the user to the risk of injury or material
damage should the unit be used
improperly.
* Material damage refers to damage or
other adverse effects caused with
respect to the home and all its
furnishings, as well to domestic
animals or pets.
Used for instructions intended to alert
the user to the risk of death or severe
injury should the unit be used
improperly.
The ● symbol alerts the user to things that must be
carried out. The specific thing that must be done is
indicated by the design contained within the circle. In
the case of the symbol at left, it means that the power-
cord plug must be unplugged from the outlet.
The symbol alerts the user to important instructions
or warnings.The specific meaning of the symbol is
determined by the design contained within the
triangle. In the case of the symbol at left, it is used for
general cautions, warnings, or alerts to danger.
The symbol alerts the user to items that must never
be carried out (are forbidden). The specific thing that
must not be done is indicated by the design contained
within the circle. In the case of the symbol at left, it
means that the unit must never be disassembled.
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