ACE FR-2L Service Note

ELECTRONIC

RHYTHM INSTRUMENT

RHYTHM

ACE

model FR-2L

SERVICE NOTE

ACE

ELECTRONIC INDUSTRIES INC.

RHYTHM ACE FR-2L

MAIN

FEATURES

Rhythm

patterns (Rhythm

selectors)

16

Waltz

Dixieland

Western

Rock' n

Roll

Slow Rock

Bossanova

Foxtrot

Swing

Tango

Beguine

Rhumba

Samba

Mambo

Cha-Cha

Shuffle

March

Percussive Sounds

10

Bass

Drum

Low Conga

High Conga

High Bongo

Cow Bell

C

laves

Snare Drum

Cymbal

Maracas

Wirebrush

Cancel Button Switch

3

Cymbal

Claves

Snare

Drum

Volume

Control Knob

with

Switch

1

Tempo

Control Knob

1

Start Push Button Switch

1

Transistor

2SB171B 25

2SB175B

5

2SC538 8

Diode

SM150SS

107

Power Source

HQ/ll7volts

or

220-2U0volts

50/60

cycles

Dimension

600 X 300 X

83mm

Weight

6 kg

-1-

r

General Description

The Selector Switch is consisted of

16 push-button switche

All of these switches are rhythm selectors. When

any rhythm

selector

button is depressed .the Rhythm Ace

plays the corres-

ponding

rhythm. This

switch also allows

the musician to depres

two or

more

buttons simultaneously to create

truly unique

rhythms. V/hen the start switch

is

depressed,

the

Rhythm Ace

ii

turned on.

The Tempo Control Knob is used to control tempo of

the

selected rhythm. Tempo is variable

from 22 to 75measures per

minute.

The

FR-2L

itself is consisted of three major

sections and

\

power supply. The first

major

section is

the Control Section,

which consists of the

Rhythm

Generator and

Selection system.

The second major section is

the

Audio

Preamplifier

.

(Refer

fig-

ure

1.)

Hov/

to

adjust semi-fixed resistors on print

circuit boards

(P.C.B.)and lug terminal

Tempo Speed:

Speed is

variable

by adjusting VR1

and

VR3.

A:

Set the tempo speed control knob

at 4th marking from

Slow side and adjust VR1 so that tempo light brightens

3D

timg

per minute.

B:

Set

the same knob at 2nd marking from Fast side, and

adjust VR3 until light brightens

60

times

per

minutes.

Repeat same procedures until tempo speed synchronizes with

number

of

measures at 22 .24

.27 .

30

. 35

.40

.

50 .60

. 75

-times per

minute. (Ref:

Fig. 5.6)

•Decay

Time

:

If

the duration

of each sound is not

satisfactory

. the deca-\

timedength of duratiorOcan

be

adjusted

by

the

following

-2-

resistors.

Bass Drum

VR4

Low

Conga

High

Conga

High

Bongo

Cow Bell

VR5

VRb

VR7

VR8

.

9

Claves

VR10

When the

sound

of

Snare Drum. Cymbal .Maracas and Wirebrush

is too

loud or too small, ad

just

VR11.

If

the

sounds

of Bass

Drum •

Low

Conga, High Conga,High Bongo,

Cow

Bell and Claves are

louder

than

the same of

Snare Drum.

Cymbal

.Maracas and Wirebrush

or vice versa,

slight adjustment

is possible

by

VR138.(Ref. Fig. 2. 3*4)

The brightness of tempo lamp

is adjustable by VR199

on the

lug terminal located near metal

cover for power

supply.

The manufacturer

holds the right of changing such

component

parts as resistors,

condensers and coils for

improvement

with

(Ref. Fig. 2&

6)

Note:

or without

previous notice.

» RHYTHH ACE FD-2L

Detailed Block

Dl«.

TMPC LAMP

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2

Elements

Location

Dia.

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RHYTHM ACE

FR-2L

Commutator and

Logic Assembry(P.CB.FR-IA)

Elements

Location Dia.

Fig

SELECTION SYSTEM

SELEE1OT SWITCH

LAYOUT

CUKXL

Fig

a

Time

Cede 12 3 4 12 3 4

LOGIC OUTPUT

TIMING CHART

Figure

9

shows

the logic outputs

according

to

their numerical

codingO —

35)

.

Output logic

is shown

as positive

pulses

occurring

at the times indicated.

These

times are

the

48

-Count

3inary counter cycle

time.

mm trot

I

t * 4 1 *

1

4

I * * 4 1 >

i *

F1

ti

J

Fig ll

RHVTHM ACE FR-2L

AUDIO

PREAMPLIFIER Elements Location Dia.

9

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w

u

UV

=

P

UV

=

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UV

=

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u'v-s

Fig 12

OUTPUT TIME

REFERENCE CHART

ACE FR-2L Service Note

ACE FR-2L Service Note

in altre lingue

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