Roland Rhythm 77 User manual

ROLAND RHYTHM INSTRUMENT
MODEL TR-77
Roland Corporation

Touch-Plate
TR-77 PANEL DISTRI-
Pilot Lamp
SPECIAL FEATURES
1 . As it is equipped with newlv-developed start switch of touching
type, the operation will do very comfortably.
2. Metronome device is set.
3. Up-tempo switch is set which works with one touch and double
the tempo of rhythm.
4. Fade-out switch is set to add and increase the pleasure of per¬
formance in ending.
5. Many now patterns of rhythm can be created by the combination
of variation knob, heat selector and rhythm selector,
6. It is very easy to operate the instrument, by introducing a slide
volume. Especially the large-sized tempo volume makes the del¬
icate adjusting easy.
' Since solid state lamp is used for the AC Tempo-pilot lamp, it
stands long use and has no time lag with tempo speed.
8. Because six kinds of instruments are able to be adjusted to its’
out-put level respectively, this instrument will be possible to be
operated with the desirable level.

BUTION DIAGRAM
Percussion Sound Level Control
REAR PANEL
Voltage Changer AC Cord
(Select better sound Jack)
PREPARATION
1 . Connect the L-plug of the connecting cord to the low impedance
(L.IMP) of the Output .lack on the rear panel and the I-plug to
the Inpul Jack of the Organ or the amplifier. When connecting
to the auxiliary terminal (AUX) of Hi Fi stereo, connect the
pin-plug to the terminal after disassembling the I-plug by pulling
the tip of it. The same way, the high impedance (H. IMP) of the
Output Jack on the rear panel will be used. Connect the L-plug
to the Jack from which the better sound is gained, as the quali¬
ty of tones may vary in accordance witli the types of amplifiers
used.
2. Set the level volume knob of each instrument at a point of the
mark ▼ .
3. Plug the power cord into the AC outlet.
4 . Connect the plug to the START Jack on the rear panel if you
want to control the start with Footswitch.

OPERATION:
1. Turn the A.C. power switch ON. The tempo lamp shows flicker
signal.
2. Tempo pilot lamp flickers in accordance with the speed of tempo.
Move the tempo-slide volume knob to adjust the speed.
START BAR (Touch plate)
Start and Stop of the rhythm machine can be operated with
slight finger’s touch.
METRONOME
Useful to know the tempo of rhythm before your performance.
Push the metronome button, and the beat sound is produced.
If you push the button again, the sound is suspended. Beat sounds
have the same count with the rhythm of rhythm selector.
When metronome works on, you can get any rhythm by rhythm -
selector in same beat with slight touch to the touch-plate.
LEVEL ADJUSTMENT OF EACH INSTRUMENT
The output level of each instrument will increase by moving the
level adjusting volume knob to the right.
Moreover, Maraca3, Cymbal and High-Hat are able to be adjusted
with one knob.
TEMPO ADJUSTMENT
Moving the tempo control knob in the right direction will increa¬
se tempo speed, and moving conversly will decrease tempo speed.
TEMPO PILOT LAMP
The power switch is ON, the TEMPO PILOT L.AMP repeats
flickers.
RHYTHM SELECTOR
10 kinds of rhythm buttons for Jazz and Latin, and the 10 but¬
tons for Latin rhythms have automatic cancel system. The Latin

rhythms do not come out unless LATIN is ON. 1’his device is
for prevention of mixture of Jazz rhythms with Latin rhythms.
For example, the button for Ballade is pushed while Waltz is
being performed, the button for Waltz is automatically canceled.
The same is true of the button for Mambo (Latin rhythm).
Only when the huttnn for Mamho was pressed before, Mambo
comes out by pressing LATIN, and Waltz is automatically can¬
celed. Reversely, when the button for Mambo is ON, pressing
of Waltz button will make cancellation of Mambo with automati¬
cal change of LATIN.
Be careful of the speedy tempo of Slow Rock, Ballade, Jazz-
Waltz, Waltz, 6/8 March and Bolero.
CANCEL BUTTON
Just one push of Cancel button placed right end of Jazz rhythm
selector cancels all rhythms of Latin and Jazz line, leaving vari¬
ation only.
BEAT SELECTOR and VARIATION
By pushing one of the beat buttons and turning the VARIATION
knob, the rhythm indicated by the arrow of the knob can be ob¬
tained.
FADE-OUT SWITCH:
In the closing part of performance, the ending effect is produced
automatically by using fade-out switch. Press the switch“ON ”,
and the volume will be diminished in accordance with the fade
time set beforehand.
Press the same switch again, and the volume will be suddenly
restored to the original, then it will be diminished repeatedly.
This is quite interesting features in performance.
UP-TEMPO SWITCH:
Up-tempo switch works remarkably when you want to double the
tempo suddenly and enjoy performance.
Press the switch "ON” and the tempo will be doubled instantly.
With “OFF” switch pressed, the tempo is restored to the form¬
er state.
Up-tempo switch adds interest and pleasure to your performance.

RHYTHM COMBINATION
By combining rhythm selector and beat selector simultaneously,
interesting mixed rhythm patterns can be produced- In case of
pushing two or more rhythm buttons, be careful to detach fin¬
gers simultaneously. When combining Slow Rock, Ballade, Jazz-
Waltz, Waltz, 6/8 March, Bolero and others together, threeor
six-beat rhythm comes out, remember it.
Combination of these rhythms will produce interesting rhythms.
PRECAUTION
1. Avoid playing near the fluorescent lights, neon lights, transform¬
ers and others so that undesirable noises can not be created.
2. It is free from sound distortion, but it should be played under
the maximum limit of the amplifier capacity. To connect the mod¬
el with amplifiers having enough ample output power is always
recommended.
3. As it covers a very wide range of tones, the quality of tones
may vary in accordance witli the types of amplifiers used. It is
desirable to use amplifiers having high selective power.
4. Avoid using “ROLAND RHYTHM” in high temperature and hu¬
mid place. Be careful not to leave it in accumulated dust which
will take damp.
5. Since the Voltage changer used as changing AC Voltage on the
rear panel is set on the AC Voltage in every country, it should
not be turned.

4
BEAT
_
2
BEAT
RHYTHM PATTERN
Each sound of musical instruments is identified by the
position and figure of notes on the five lines.
MEim NJWE
iiii mm
Low Conga High Bongo Rim Shot Cow Boll Hi-Hat Cymbal
Bass Drum Low Bongo Snare Drum Craves Maracas Tambourine Guiro
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403-cot
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ROLAND
RHYTHM
TR-77
POWER
SUPPLY
and
DETAILED
BLOCK
DIAGRAM
Please
admit
that
the
circuit
may
be
partially
changed
without
warring.