ROLAND G 77

Page 2

G-77

ADJUSTMENT

1. NECK

This adjustment must be carried out with the string
tension and height set for the actual playing condi-
tions. Accordingly, the Para. 2 String Height and
Para. 3 Octave need be before and after this adjust»
ment.

1-1. With the 1st and let frets simultaneously pressed,
measure the distance between the top of the 8th
fret and the bottom of each of the Ist and 4th
strings.

If the distance is not within a range of 0.5 to 0.8
mm (0.02 to 0.03 inch), proceed with the follow-
ing.
See Fig. 1.
CONVEX. . . .Rotate the rod adjuster nut
clockwise.
CONCAVE. . .Rotate the rod adjuster nut
counterclockwise.

2. STRING HEIGHT
2-1. See Fig. 3. Loosen the screws A on the tailpiece.

2-2. Measure the distance between each open string and
the top of the 12th fret.
If a measurement deviates from the value in Fig. 4,
rotate the associated screw B and adjust the
bridge saddle height.

2-3. Except when not proceeding to the Para. 3 Octave,
restore the screw A.

215! fret
<:=

0.5 - 0.8mm

8th fret

3. OCTAVE (INTONATION)

3-1.

3-2.

3-3.

3-4.

3-6.

Loosen the screws A on the tailpiece.
(Use a tuning instrument as desired.)
Tune all strings (open string).

Play any string on the 12th fret and measure its
pitch. The pitch must be exactly one octave higher
than that of open string. As necessary, move the
bridge saddle as follows:

Higher pitch . . . .Rotate the screw C clockwise
to move the saddle away
from the neck.

Lower pitch . . . .Rotate the screw C counter-
clockwise to move the saddle
toward the neck.

Repeat steps 3-2 and 3-3 until the open string and
the 12th fret are on correct pitch.

Adjust the remaining strings in the same proce-
dure.

Tighten the screws A.

Elli] L (CW) Eli] L (COW)

ore

E ""9 filings
neck i E R

4. HUMBUCKING PICKUP

4-1. See Fig. 3. Turn the screws D to adjust the dis-
tance between the hurnbucking pickup and the
string as follows:

Pickup on the neck side 4mm (0.1575 inch)
Pickup on the bridge side 2mm (0.0787 inch)

5. DIVIDED PICKUP HEIGHT
(REFER TO FIG. 3.)

5-1. Place the attached filler gauge F on the divided
pickup.
Adjust the 1st string side screw E to an extent that
the 1st string lightly touches the filler gauge when
the string is pressed at the 21st fret.

Clearance ...... about 1mm (0.04 inch)
Repeat the same procedure for the 4th string side.
6. DIVIDED PICKUP

Note: Before this adjustment, be sure to complete the
preceding adjustments.

6-1. Connect G77 to GR-77B and amplifier.

6-2. Push TUNE on the GR77B panel. The TUNE
indicator will flicker.

63. Press NUMBER PEDAL 2", and the display will
change to "PU-L". The GR-77 is ready for generat-
ing the test tone upon playing any string on the
guitar controller,

6-4. Fingering on the 5th fret, play a string, softly then
hard: The test tone may step between III and (E
in pitch as shown in Fig. 5 in the direction A on a
strum and B on a flip.

1% 2. 5mm lst string 0. 098111
2% 2. 6mm 2nd string 0. 102 i n
335 2. 8mm 3rd string 0. 110 i n
45?} 3. 0mm 4th string 0. 118i n

FEB. 1986

6-5. Adjust each string in the following procedure.
(1) Play a string powerfully (fortissimo *).

When the string allows the test tone to stay at
pitch E) with intermittent jump to )3, no adjust-
ment is needed.

When the string causes the test tone to step
between (II and I, or E), proceed the following.

(2) During adjustment in step (3) below, rotate the
corresponding trimmer (VR01 -- VR04) on the
(3.77 in either of the following directions.

. Clockwise .......... Pitch is in a range of
(I) to El .
. Counterclockwise ..... Pitch is on (E.

(3) Play a string fortissimo several time on the 5th
fret. Rotate the trimmer in a direction stated in
(2). Repeat the steps until pitch is at (Z) shifts (E)
intermittently.

* This is not a powerful picking intended for test pur-

pose but the one often encountered in common
performance.

Hard picking B

A

Iii-IEE

Soft picking

m Test tone is one octave higher than of the open string.
BEKK'FCDEJZ U I ZI 7 9 -7iiil."ak

Test bone is the 3rd higher than that of (I)
EQEJ: U 3 31:03

E] Test tone is the 5th higher than that of (I!
[30%; U 5 cum;

[1] Test tone is an octave higher than that of (I)
EWEJ: U '| 1751-75-37?

(:1 Test tone vibrates.
Eb)? it E '4