Owner’s Manual
DCAC
AC & BATTERY
POWERED
FET
1
Thank you, and congratulations on your choice of BOSS TU-2 Chromatic Tuner.
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY”
and “IMPORTANT NOTES” (p. 28–34; 5–7). 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, Owner’s manual
should be read in its entirety. The manual should be saved and kept on hand as a convenient reference.
Copyright © 1998 BOSS CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the
written permission of BOSS CORPORATION.
2
Features
• The ideal tuner for use in live concert situations.
• Since the TU-2 uses the same shape and structure as other Boss compact effect
units, it features excellent durability and allows neat connection with other effect
units.
• The OUTPUT is muted when the tuning function is on, allowing you to tune
without being heard.
• High-luminosity LEDs allow visual tuning even in outdoor sunlight.
• You can choose from two types of meter display: CENT (normal needle-style
movement), or STREAM (a flow of lights indicates the pitch deviation).
• In addition to chromatic mode which indicates the note name of the input sound,
you can also use Guitar/Bass mode which displays the string number. (5-string
bass is supported.)
3
• In Guitar/Bass mode, you can also use Flat tuning (a semitone down) or Doubleflat tuning (a whole step down).
• When the tuner is off, a battery conservation function minimizes power consumption.
•By using an AC adapter (sold separately) with the DC 9V in/out jacks, you can
supply power to other compact effect units as well.
4
IMPORTANT NOTES
In addition to the items listed under “USING THE UNIT SAFELY” on page 28–34, please read
and observe the following:
Power Supply: Use of Batteries
• Do not use this unit on the same power
circuit with any device that will generate
line noise (such as an electric motor or
variable lighting system).
• The AC adaptor will begin to generate
heat after long hours of consecutive use.
This is normal, and is not a cause for concern.
• Batteries should always be installed or re-
placed before connecting any other devices. This way, you can prevent malfunction and/or damage to speakers or other
devices.
•A battery was installed in the unit before it
left the factory. The life of this battery may
be limited, however, since its primary purpose was to enable testing.
• Before connecting this unit to other devices, turn off the power to all units. This
will help prevent malfunctions and/or
damage to speakers or other devices.
Placement
• Using the unit near power amplifiers (or
other equipment containing large power
transformers) may induce hum. To alleviate the problem, change the orientation of
this unit; or move it farther away from the
source of interference.
5
• This device may interfere with radio and
television reception. Do not use this device in the vicinity of such receivers.
• Do not expose the unit to direct sunlight,
place it near devices that radiate heat,
leave it inside an enclosed vehicle, or otherwise subject it to temperature extremes.
Excessive heat can deform or discolor the
unit.
• To avoid possible breakdown, do not use
the unit in a wet area, such as an area exposed to rain or other moisture.
6
Maintenance
• For everyday cleaning wipe the unit with a
soft, dry cloth or one that has been slightly
dampened with water. To remove stubborn dirt, use a cloth impregnated with a
mild, non-abrasive detergent. Afterwards,
be sure to wipe the unit thoroughly with a
soft, dry cloth.
• Never use benzine, thinners, alcohol or
solvents of any kind, to avoid the possibility of discoloration and/or deformation.
Additional Precautions
• Use a reasonable amount of care when
using the unit’s buttons, sliders, or other
controls; and when using its jacks and
connectors. Rough handling can lead to
malfunctions.
• Never strike or apply strong pressure to
the display.
• When connecting / disconnecting all
cables, grasp the connector itself—never
pull on the cable. This way you will avoid
causing shorts, or damage to the cable’s
internal elements.
• To avoid disturbing your neighbors, try to
keep the unit’s volume at reasonable levels. You may prefer to use headphones, so
you do not need to be concerned about
those around you (especially when it is
late at night).
7
Panel Description
1 82
5
3
7
10 9
11
8
1. DC 9V In jack
An AC adapter (BOSS PSA series: sold separately)
can be connected to this jack. If an AC adapter is
used, you will be able to play for extended periods without worrying about battery life.
* As soon as you connect the AC adapter, the
unit is turned ON.
2. DC 9V Out jack
4
When an AC adapter is used, you can connect a
PCS-20A parallel DC cord (sold separately) to
6
supply power to other PSA-adaptor-compatible
devices.
* Power cannot be supplied when the TU-2 is
running on batteries.
*
There are two types of adaptors in the PSA series;
they differ by the maximum amount of current
that they are able to output (200 mA or 500 mA).
If you're using the PCS-20A in combination with a
12
13
PSA series adaptor, make sure that the total current consumption of this unit and the PSA-adaptor-compatible devices being supplied with
power doesn't exceed the maximum output of the
PSA series adaptor you're using (200 mA or 500
mA).
3. Meter
The meter indicates the pitch deviation of
the input sound from the note name or string
number that is shown in the note name /
string number indicator.
CENT display
The LED that is lit will be further toward the
left as the input pitch is flat, and further toward the right as the input pitch is sharp.
The pitch is correct when the center (green)
indicator of the meter is lit.
STREAM display
Deviation of the input pitch will be shown
by a flow of lights toward left or right.
The lights will flow toward the left if the input pitch is flat, and toward the right if the
input pitch is sharp.
As the pitch deviation decreases, the flow
will become slower, and the flow will stop
when the pitch is correct.
4.
Note name / String number in-
dicator
In Chromatic mode, this indicates the note
name.
In Guitar/Bass mode, this indicates the string
number.
9
5. Tuning guide indicators
Guitar
Guitar Flat
Guitar Double Flat
Bass Double Flat
Bass Flat
Bass Chromatic
These will light to roughly indicate the tuning.
The pitch is flat
The pitch is sharp
The pitch is correct
(within +/-3 cents)
10
6. MODE select switch
This switch changes the tuning mode.
When this switch is first pressed, the meter
will blink to indicate the current mode.
If you press the switch again, the meter will
cycle through the following modes, and the
corresponding indicator will light.
7. STREAM/CENT select switch
This switches the meter display method.
The meter will indicate the selected display
method for approximately two seconds after
the method has been switched.
8. CHECK indicator
This shows the Tuner On/Off status and also
serves as a battery check indicator.
This indicator will light when the tuner is on.
If the indicator is dim or fails to light when
the tuner is on, the battery has run down,
and should be replaced with a new battery
as soon as possible. For the procedure, refer
to “Changing the battery” (page 23).
*The CHECK indicator shows whether the ef-
fect is being applied or not. It does not indicate whether the power to the device is on or
not.
9. INPUT jack
Use this jack to connect the electric guitar /
electric bass that you wish to tune.
* When a battery is used, the input jack also
functions as a power switch. When a plug is
inserted into the input jack, the power will
be turned on. When the plug is pulled out,
the power will be turned off. When you are
not using the tuner, pull the plug out of the
input jack.
10. OUTPUT jack
Connect your amp or another effect unit to
this jack.
When the tuner is off, this will output the signal of the instrument connected to the Input
jack.
When the tuner is on, no sound will be output from this jack, so use this jack if you wish
to tune silently.
11
11. BYPASS jack
Connect your amp or another effect unit to
this jack.
This jack will always output the signal from
the instrument connected to the Input jack.
Use this jack if you want to be heard while
you tune.
12. Pedal switch
Pressing this switch will turn the tuner on/off.
13. Thumbscrew
When this screw is loosened, the pedal will
open, allowing you to change the battery.
For the procedure, refer to “Changing the
battery” (page 23).
12
Connections
*Before connecting or disconnecting any patch cords, be sure all the volume controls in your
system are set to minimum. This will help prevent any damage to system components.
* To prevent malfunction and/or damage to speakers or other devices, always turn down the vol-
ume, and turn off the power on all devices before making any connections.
* If there are batteries in the unit while an AC adaptor is being used, normal operation will con-
tinue should the line voltage be interrupted (power blackout or power cord disconnection).
Parallel DC cord (PCS-20A: optional)
(OUTPUT) If you do not want to be heard while tuning
OUT DC 9V
AC Adaptor
(PSA-Series: optional)
Electric Guitar
Amplifier
Boss compact other
effect units
Electric Bass
(BYPASS) If you want to be heard while tuning
13
Turning on the power
* Always make sure to have the volume level of your amp turned down before switching on power.
Even with the volume all the way down, you may still hear some sound when the power is
switched on, but this is normal, and does not indicate a malfunction.
If you are using an AC adapter
The power will be turned on when you connect the AC adapter to the DC 9V In jack.
When the power is turned on, the meter will light to indicate the current tuning mode. Then
the note name / string number indicator will indicate the first digit of the currently selected
standard pitch.
440 Hz
If you are using a battery
The power will be turned on when you insert
a plug into the Input jack.
14
Tuning in chromatic mode
* If you wish to change the standard pitch, do so before you begin tuning (page 20).
1. Press the MODE select switch several
times to make “CHROMATIC” light.
* When the TU-2 is shipped from the fac-
tory Chromatic mode is selected.
2. If the tuner is not on (CHECK should be
lit), press the pedal to turn it on.
3. Play a single note on your instrument.
The name of the note closest to the pitch
of the input sound will appear in the note
name / string number indicator, and the
meter will indicate the pitch deviation.
(Note name display)
C C# D D#
E F F# G
G# A A# B
4. Tune your instrument.
15
Tuning in Guitar mode
* If you wish to change the standard pitch, do so before you begin tuning (page 20).
1. Press the MODE select switch several
times to make “GUITAR” light.
16
If you are using flat tuning (semitone
down) make “ ” light. If you are using
double flat tuning (whole step down)
make “ ” light.
Flat tuning
Double flat tuning
2. If the tuner is not on (CHECK should be
lit), press the pedal to turn it on.
3. Play a single note on your instrument.
The string number closest to the pitch of
the input sound will appear in the note
name / string number indicator, and the
meter will indicate the pitch deviation.
(String number display)
1st string E 2nd string B
3rd string G 4th string D
5th string A 6th string E
4. Tune your instrument.
17
Tuning in Bass mode
* If you wish to change the standard pitch, do so before you begin tuning (page 20).
1. Press the MODE select switch several
times to make “BASS” light.
18
If you are using flat tuning (semitone
down) make “ ” light. If you are using
double flat tuning (whole step down)
make “ ” light.
Flat tuning
Double flat tuning
2. If the tuner is not on (CHECK should be
lit), press the pedal to turn it on.
3. Play a single note on your instrument.
The string number closest to the pitch of
the input sound will appear in the note
name / string number indicator, and the
meter will indicate the pitch deviation.
(String number display)
1st string G 2nd string D
3rd string A 4th string E
LoB (5th string) B
4. Tune your instrument.
19
Adjusting the standard pitch
1. Simultaneously press the MODE select
switch and the STREAM/CENT select
switch.
2. The first digit of the currently selected
standard pitch (0, if 440 Hz) will blink in
the note name / string number display.
440 441 442 443
439 438 445 444
When you press the STREAM/CENT select switch, the standard pitch will
change as follows.
3. Press the MODE select switch to change
the standard pitch as follows.
20
440 441 442 443
439 438 445 444
The standard pitch will be memorized
until the power is turned off.
When you turn off the power, the standard pitch will be reset to 440 Hz.
Memorizing the standard pitch
With the factory settings, the TU-2 will return to a standard pitch of 440 Hz when the power
is turned off.
If you wish to leave the standard pitch at a setting of other than 440 Hz, you can use the
following procedure to memorize the standard pitch.
1. Turn on the power while holding down the MODE select switch.
The note name / string number indicator will show “n“ (standard pitch not
memorized).
2. While continuing to hold down the MODE select switch, press the STREAM/
CENT select switch within two seconds to make the note name / string number
indicator light “P“ (standard pitch memorized).
3. When you release the meter display method select switch and the MODE select switch,
the TU-2 will return to normal operation.
With this setting, the standard pitch will be memorized even if the power is turned off.
21
Storefront demo display
1. Turn on the power while holding down the STREAM/CENT select switch.
2. Continue holding down the switch for approximately two seconds.
3. The storefront demo display mode will begin. Release the switch.
4. The demo will continue until you turn the power off and on again, or until you operate
the pedal switch.
* Do not use when operating on batteries. This will run the battery down.
22
Changing the battery
When the CHECK indicator goes dim or no
longer lights while an effect is on, it means
that the battery is nearly dead and must be
replaced.
Replace the battery following the steps below.
Thumbscrew
Pedal
Spring Base
Battery
Housing
Coil Spring
Guide
Bush
Hole
Battery Snap Cord
Battery Snap
9V Battery
1. Loosen the thumbscrew at the front of the
pedal, then lift the pedal upwards to open
the unit.
* The thumbscrew can be left in the pedal
while changing the battery.
2. Remove the old battery from the battery
housing, and remove the battery snap connected to it.
3. Connect the battery snap to the new battery, and place the battery inside the battery housing.
* Be sure to carefully observe the battery’s
polarity (+ versus -).
4. Slip the coil spring onto the spring base on
the back of the pedal, then close the pedal.
* Carefully avoid getting the snap cord
caught in the coil spring.
5. Finally, insert the thumbscrew into the
guide bush hole and fasten it securely.
23
Various types of tuning
By using Chromatic mode
you can tune in a variety of
ways.
First, tune normally to get
each string in tune. Then refer to the following tables
and adjust each string to the
appropriate note name.
Open D
Raise / Lower Note name
6th string D
5th string — A
4th string — D
3rd string F#
2nd string
1st string
Open G
Raise / Lower Note name
6th string D
5th string G
4th string — D
3rd string — G
A
D
2nd string — B
1st string D
Regular tuning
Raise / Lower Note name
6th string — E
5th string — A
4th string — D
3rd string — G
2nd string — B
1st string — E
24
Open E
Raise / Lower Note name
6th string — E
5th string
4th string E
3rd string G#
2nd string — B
1st string — E
B
Open A
Raise / Lower Note name
6th string — E
5th string — A
4th string
3rd string A
2nd string C#
1st string — E
E
Drop D
Raise / Lower Note name
6th string D
5th string — A
4th string — D
3rd string — G
2nd string — B
1st string — E
Semitone flat
(Guitar
Raise / Lower Note name
6th string
5th string G#
4th string C#
3rd string F#
2nd string A#
1st string D#
is also possible)
D#
1 and a half steps flat
Raise / Lower Note name
6th string C#
5th string F#
4th string B
3rd string E
2nd string G#
1st string C#
DADGAD
Raise / Lower Note name
6th string
5th string — A
4th string — D
3rd string — G
2nd string A
1st string D
D
1 note flat
(Guitar
Raise / Lower Note name
6th string
5th string G
4th string C
3rd string F
2nd string A
1st string D
is also possible)
D
2 whole tones flat
Raise / Lower Note name
6th string
5th string F
4th string A#
3rd string D#
2nd string G
1st string C
C
25
Specifications
TU-2: Chromatic Tuner
Reference Pitch .......... A4 = 438 to 445 Hz (1 Hz step)
Tuning Range ............. C0 (16.35 Hz) to C8 (4186 Hz)
Tuning Accuracy ........ +/-3 cents
Input Impedance ........ 1 MΩ
Controls ..................... STREAM/CENT select switch, MODE select switch, Pedal switch
Indicators ................... Meter, Note name/String number indicator, Tuning guide indicators,
Check indicator
Connectors ................ Input jack, Output jack, Bypass jack, DC 9V In jack, DC 9V Out jack
Power Supply ............. DC 9V: Dry battery (6F22/9V), AC Adaptor (PSA-Series: Optional)
Current Draw ............. 55 mA (Max.)
26
* Expected battery life under continuous use:
Carbon: 1.5 hours (When the tuner is continuously on)
6 hours (When the tuner is on for one minute and off
for three minutes)
Alkaline: 6 hours (When the tuner is continuously on)
These figures will vary depending on the actual conditions of use.
Dimensions ................ 73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight ....................... 420 g / 15 oz (including battery)
Accessories ................ Owner's Manual
Dry battery; 6F22/9V (Carbon)
Leaflet
(“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
Options ...................... AC Adaptor PSA-Series
Parallel DC Cord PCS-20A
* In the interest of product improvement, the specifications and/or appearance of this unit are
subject to change without prior notice.
27
28
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 powercord 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.
001
• Before using this unit, make sure to
read the instructions below, and the
Owner's Manual.
...............................................................................
002c
• Do not open (or modify in any way)
the unit or its AC adaptor.
...............................................................................
003
• Do not attempt to repair the unit, or
replace parts within it (except when
this manual provides specific instructions directing you to do so). Refer all
servicing to your retailer, the nearest
Roland Service Center, or an authorized Roland distributor, as listed on
the "Information" page.
...............................................................................
004
• Never use or store the unit in places
that are:
• Subject to temperature extremes
(e.g., direct sunlight in an enclosed
vehicle, near a heating duct, on top
of heat-generating equipment); or
are
• Damp (e.g., baths, washrooms, on
wet floors); or are
• Humid; or are
• Exposed to rain; or are
• Dusty; or are
• Subject to high levels of vibration.
...............................................................................
007
• 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.
...............................................................................
008b
29
008b
Use only the specified AC adaptor
(PSA series), and make sure the line
voltage at the installation matches the
input voltage specified on the AC
adaptor’s body. Other AC adaptors
may use a different polarity, or be
designed for a different voltage, so
their use could result in damage, mal
function, or electric shock.
011
...............................................................................
Do not allow any objects (e.g., flammable material, coins, pins); or liquids
of any kind (water, soft drinks, etc.) to
penetrate the unit.
-
...............................................................................
Avoid damaging the power cord. Do
not bend it excessively, step on it,
place heavy objects on it, etc. A dam
aged cord can easily become a shock
or fire hazard. Never use a power
cord after it has been damaged.
...............................................................................
-
30
010
This unit, 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 immediately stop using
the unit, and consult an audiologist.
...............................................................................
There are two types of adaptors in
011
the PSA series; they differ by the
maximum amount of current that
they are able to output (200 mA or
500 mA).
If you’re using the PCS-20A in combination with a PSA series adaptor,
make sure that the total current consumption of this unit and the PSAadaptor-compatible devices being
supplied with power doesn’t exceed
the maximum output of the PSA series
adaptor you’re using (200 mA or 500 mA).
...............................................................................
012c
• Immediately turn the power off,
remove the AC adaptor from the outlet, and request servicing by your
retailer, the nearest Roland Service
Center, or an authorized Roland distributor, as listed on the "Information"
page when:
• The AC adaptor or the power-sup-
ply cord has been damaged; or
• Objects have fallen into, or liquid
has been spilled onto the unit; or
• The unit has been exposed to rain
(or otherwise has become wet); or
• The unit does not appear to oper-
ate normally or exhibits a marked
change in performance.
...............................................................................
013
• 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.
...............................................................................
014
•Protect the unit from strong impact.
(Do not drop it!)
...............................................................................
015
• 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.
...............................................................................
016
• Before using the unit in a foreign
country, consult with your retailer,
the nearest Roland Service Center, or
an authorized Roland distributor, as
listed on the "Information" page.
...............................................................................
31
019
• Batteries must never be recharged,
heated, taken apart, or thrown into
fire or water.
...............................................................................
32
101b
• The unit and the AC adaptor should
be located so their location or position
does not interfere with their proper
ventilation.
...............................................................................
102d
• Always grasp only the plug or the
body of the AC adaptor when plugging into, or unplugging from, an outlet or this unit.
...............................................................................
103b
• Whenever the unit is to remain
unused for an extended period of
time, disconnect the AC adaptor.
...............................................................................
104
• 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.
106
• Never climb on top of, nor place
heavy objects on the unit.
...............................................................................
107d
• Never handle the AC adaptor body,
or its plugs, with wet hands when
plugging into, or unplugging from,
an outlet or this unit.
...............................................................................
108b
• Before moving the unit, disconnect
the AC adaptor and all cords coming
from external devices.
...............................................................................
109b
• Before cleaning the unit, turn off the
power and unplug the AC adaptor
from the outlet (p. 13).
...............................................................................
110b
•Whenever you suspect the possibility
of lightning in your area, disconnect
the AC adaptor from the outlet.
...............................................................................
111: Selection
• If used improperly, batteries may
explode or leak and cause damage or
injury. In the interest of safety, please
read and observe the following precautions (p. 23).
1 •Carefully follow the installation
instructions for batteries, and make
sure you observe the correct polarity.
3 • Remove the batteries whenever the
unit is to remain unused for an
extended period of time.
5 • If a battery has leaked, use a soft
piece of cloth or paper towel to
wipe all remnants of the discharge
from the battery compartment.
Then install new batteries. To
avoid inflammation of the skin,
make sure that none of the battery
discharge gets onto your hands or
skin. Exercise the utmost caution
so that none of the discharge gets
near your eyes. Immediately rinse
the affected area with running
water if any of the discharge has
entered the eyes.
33
6 • Never keep batteries together with
metallic objects such as ballpoint
pens, necklaces, hairpins, etc.
...............................................................................
112
•Used batteries must be disposed of in
compliance with whatever regulations for their safe disposal that may
be observed in the region in which
you live.
...............................................................................
34
For EU Countries
This product complies with the requirements of European Directive 89/336/EEC.
For the USA
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.
Unauthorized changes or modification to this system can void the users authority to operate this equipment.
This equipment requires shielded interface cables in order to meet FCC class B Limit.
For Canada
NOTICE
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numrique de la classe B respecte toutes les exigences du Rglement sur le matriel brouilleur du Canada.
AVIS
35
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G6017441R0 7RTC
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