Stream/Cent Select Switch; Check Indicator; Input Jack; Output Jack - Boss TU-2 Chromatic Tuner Owner's Manual

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 indi-
cate 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 sig-
nal of the instrument connected to the Input
jack.
When the tuner is on, no sound will be out-
put from this jack, so use this jack if you wish
to tune silently.
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