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6 EN

As battery power becomes low, the battery check indicator will light. 
Replace the batteries as soon as possible.

q

Press the release lever on the battery case in the direction indi-
cated by the arrow 

 in the illustration in order to unlock it, and 

then slide out the battery holder.

w

Remove the old batteries from the battery holder, and insert the 
two new size AA alkaline batteries. Make sure that the poles on 
the batteries are properly positioned as shown in the diagram 
inside of the holder.

e

Slide the battery holder back into the battery case and press 
firmly so that the battery holder locks in place. 

q

Press and hold the TUNER switch until the 

 display lights 

to switch the tuner power ON.

w

Tune the guitar string until the note name of the desired pitch 
appears in the display.

e

The string is in tune when only the 

 lamp lights in the center of 

the  

display.

r

Press the TUNER switch again to switch the tuner power OFF. Also, 
if the note name is not shown in the display for more than 1 minute, 
the power will automatically switch OFF. ( 

 display goes off)

* It may take a few seconds before the tuner can detect pitches after 

being switched ON.

* The note name and 

 displays may have difficulty keeping up 

with irregular pitch changes. Gradually change the pitch and check 
when tuning.

* The tuner may not be able to detect notes rich with overtones or with 

very short sustain.

* Sound output is not muted when the tuner is being used.

BATTERY REPLACEMENT

Battery Holder

Alkaline 
battery x2

Release Lever

USING THE TUNER

Pitch is low



In Tune



Pitch is high

Summary of Contents for System66

Page 1: ...m System66 Pickup Bar Sensor Piezo type Preamplifier Controls Vol 3 Band EQ HIGH MID LOW AMF control TUNER Output Jack Combination end pin power switch Output Impedance 1kΩ Batteries Size AA alkaline battery LR6 x2 Battery Life Approx 180 hours Without tuner and using alkaline batteries May differ due to operating conditions Tuner Chromatic type 12 semi tones A4 440Hz Accuracy range 3 cents Access...

Page 2: ...strument turn off the power immediately and have the instrument inspected by qualified Yamaha service personnel When one of the following problems occur immediately turn off the power and remove all batteries from the instrument then have the instrument inspected by Yamaha service personnel It emits unusual smells or smoke Some object has been dropped into the instrument There is a sudden loss of ...

Page 3: ...er on or off for all components set all volume levels to minimum Be sure to set the volumes of all components at their minimum levels and gradually raise the volume controls while playing the instrument to set the desired listening level Do not place the instrument in an unstable position where it might accidentally fall over Do not rest your weight on or place heavy objects on the instrument and ...

Page 4: ...ion Battery Holder Control Section Output Jack with power switch function Sound Hole Cover supplied The built in preamplifier is automatically turned ON when a guitar cable is connected to the output jack The tuner can be turned on or off anytime ...

Page 5: ...vel setting Turn clockwise to boost or counter clockwise to cut LOW Boosts or cuts the level of the low frequencies MID Boosts or cuts the level of the middle frequencies The AMF control r adjusts the center frequency of the band affected by this control HIGH Boosts or cuts the level of the high frequencies r AMF Adjustable Mid Frequency Control Sets the center frequency of the band of frequencies...

Page 6: ...switch the tuner power ON w Tune the guitar string until the note name of the desired pitch appears in the display e The string is in tune when only the lamp lights in the center of the display r Press the TUNER switch again to switch the tuner power OFF Also if the note name is not shown in the display for more than 1 minute the power will automatically switch OFF display goes off It may take a f...

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