AKAI AT 901 User Manual

ABBREVIATIONS

FOR

THE

SERVICE

MANUAL

SAFETY

INSTRUCTION

SAFETY

Confirm

greater

[C]

headphone

PRECAUTIONS

1.

2.

4.

CHECK

the

specified

than

10

Mohms,

or

[a]i

specified

jacks,

line-in-out

DURING

Parts

identified

Replace

In

addition

applying

Examples:

Use

specified

1)

Wires

2)

Double

3)

High

Use

specified

1)

Insulation

2)

PVC

3)

Spacers

4)

Insulation

5)

Plastic

When

replacing

ends

of

by

only

with

to

safety,

to

spurious

RF

.converters,

blocking

internal

covered

insulated

voltage

insulating

Tape

tubing

(Insulating

sheets

screws

AC

wires

securely

AFTER

leads

SERVICING

insulation

but

insulation

resistance

for

equipment

between

resistance

jacks

etc.)

SERVICING

the A symbol

parts

number

other

radiation.

filters,

wiring.

with

PVC

wires

materials

Barriers)

for

transistors

for

fixing

primary

about

parts

specified.

parts

and

These

must

tuner

units,

etc.

Note

especially:

tubing

for

hazardous

microswitch

side

components

the

terminals

power

cord

with

external

should

are

critical

assemblies

also

antenna

(especially

before

antenna

be

more

than

for

safety.

are

specified

be

replaced

selector

live

parts.

(transformers,

soldering.

only

switches,

Note

in

turntable)

plug

prongs

and

terminals

2.2

with

especially:

power

(tuner,

Mohms

for

(ground

conformance

specified

RF

cables,

cords,

noise

externally

exposed

receiver,

terminals,

with

such

parts

etc.)

and

microphone

regulations

is

replacements.

noise

blocking

capacitors,

of

the

set

is

intended

for

jacks,

as

those

noise

etc.),

wrap

6.

Observe

7.

Check

8.

Also

9.

Use

10.

The

excessive

Normally,

years.

IN

VOLTAGE

Models

its

destination,

If

the

Before

dicated.

that

wires

that

replaced

check

areas

care

that

foreign

LITHIUM

heated.

LITHIUM

CASE

OF

REPLACING:

CONVERSION

for

Canada,

but

some

machine's

Voltage

connecting

do

not

contact

wires

do

not

contact

surrounding

objects

BATTERY

USA

and

machines can

can

the

power

repaired

(screws,

employed

BATTERY

RESOLDER

Japan

are

be

converted:

cord,

set

heat

producing

sharp

edged

locations.

solder

droplets,

for

memory

is

not

necessary

AND

Recommended

not

equipped

set

to

220V

or

the

VOLTAGE

-SERVICE

parts

(heatsinks,

or

pointed

etc.)

do

not

back

up

has

to

replace,

SOLDER

with

240V

SELECTOR

because

AS

RECOMMENDED

way

this

facility.

as

required.

SELECTOR

MANUAL-

oxide

metal

parts.

remain

inside

an

explosive

the

Each

on

the

probability

life

of

machine

bottom

film

resistors,

the

set.

LITHIUM

WAY.

is

preset

panel

fusible

when

BATTERY

at

the

for

the

correct

resistors,

the

battery

itself

is

about

factory

according

Voltage

is

etc.).

is

10

to

in

SECTION

1

SERVICE

I.

SPECIFICATIONS

II.

DISMANTLING

1.

HOW

TO

2.

HOW

TO

3.

HOW

TO

III.

CONTROLS

IV.

THE

KEYBOARD

FREQUENCIES

V.

PRINCIPAL

VI.

ADJUSTMENT

1.

BALANCE

2.

OFF-SET

3.

BALANCE

4.

OFF-SET

VII.

PC

VIII.

MIDI

BOARD

TITLES

IMPLEMENTATION

TABLE

OF

UNIT

OPEN

THE

FRONT

DISMANTLE

THE

REACTION-SHIP

AND

PARTS

OF

±6V

OF

FINAL

OF

BBD

OF

IC6

LOCATION

ON

THE

VCA

ON

OUTPUT

(LF

356)

ON

AND

IDENTIFICATION

CHART

MANUAL

OF

CONTENTS

PANEL

KEYBOARD

BEND

PANEL

TO

MUSICAL-NOTATION

POWER

THE

VOICE

ON

THE

CPU

BLOCK

EQUALLY

SUPPLY

CHORUS

PC

TEMPERED

PC

BOARD

PC

BOARD

NUMBERS

BOARD

4

5

6

SCALE

7

8

9

10

This

Mannal

is

available

produced

LTD.,

Tokyo,

FOR

to

unauthorized

in

any form

Japan.

INTERNAL

personal.

without

-SERVICE

USE

No

permission

MANUAL-

ONLY

and

part

from

most

of

this

manual

AKAI-ELECTRIC

not

be

may

made

be

re

CO.,

I.

SPECIFICATIONS

MODEL

AX60

-SERVICE

MANUAL-

2-2.

HOW

TO

DISMANTLE

1)

Remove 6 screws

on

the

THE

Bottom

plate,

KEYBOARD

and

disconnect

(Refer

the

to

Fig.

2-2

and

connectors

PI

and

P2

Fig.

2-3)

on

the

CPU

PC

Board.

*

For

improvement

II.

DISMANTLING

In

case

of

trouble,

Reassemble

purposes,

etc.

necessitating

in

reverse

order.

specifications

dismantling,

and

OF

design

are

UNIT

please

dismantle

subject to

change

in

the

without

order

shown

prior

notice.

in

the

photographs.

2-3.

HOW

FOR

TO

DISMANTLE

THE

FOR

THE

KEYBOARD

THE

BEND

PANEL

KEYBOARD

FOR

THE

BLOCK

(Refer

BEND

to

SCREWS

PANEL

Fig.

2-2

and

BLK

Fig.

2-3)

Fig.

2-2

2-1.

HOW

1)

Remove

TO

OPEN

8 screws

as

shown

THE

Fig.

FRONT

2-1,

and

PANEL

open

the

(Refer

to Fig.

Front

Panel

2-1)

as

shown

Fig.

2-3.

SCREWS

1)

Remove 6 screws

on

the

OPERATION

as

FOR

shown

Fig.

(B)

PC

Board.

SCREWS

THE

BEND

2-2

and

PI

BLK

Fig.

2-3,

P5

and

disconnect

P4

DISCONNECT

WHEN

DISCONNECT

AND

PI

DISMANTLING

the

P2

PI

PI 8 P2

DISMANTLING

P4 8 P5

(ON

THE

connectors

OPERATION(B)

THE

BEND

P4,

(ON

THE

KEYBOARD.

(ON

THE CPU

PANEL

P5

on

the

CPU

PCB),

WHEN

BLK.

CPU

PC

Board

and

PI

Fig.

2-1

SERVICE

MANUAL-

Fig.

2-3

III.

CONTROLS

LFO

PARAMETER

DEPTH:

Sets

SPEED:

Sets

DELAY:

Sets

modulation

Key.

SET-UP

the

modulation

the

modulation

the

amount

to

KNOBS

intensity

frequency.

of

time

start after

for

pressing

the

a

LFO

SELECT

To

select

LFO

DICATORS

BUTTON

destinations

WAVEFORM

and

INDICATORS-

of

LFO

effect.

SELECT

BUTTON

and

IN

OCTAVE

TORS

To

board

(lowest

SELECT

set

the

between

range).

BUTTON

basic

octave

2'

(highest

and

range

of

range)

INDICA

the

key

and

32'

VCO

PARAMETER

PJLSE

WIDTH:

SEED:

E

DEPTH:

AVCO) -B

EUANCE

(NOISE/SAMPLER)

CONTROL

SET-UP

Acts

changes

waveform.

Controls

that

width

KNOBS

tike a tone

control

the

timbre

an

LFO

changes

automatically

KNOB

that

of

each

frequency

the

CHORUS

BUTTON

To

ARPEGGIO

SELECT

MODE:

HOLD:

ON/OFF:

ARPEGGIO

MASTER

SPUT

UNISON

SELECT

AUTO

(1/2/OFF)

and

select

chorus

MODE

BUTTONS

To

Select

DOWN'.

To

Hotd

To

turn

effect

the

entire

In

0-6

fects

4-2

tion

SPEED

LEVEL

BALANCE

MODE

BUTTON

TUNE

and 6-0

affects

BUTTON-

SELECT

INDICATORS

effects

an

on

or

function.

keyboard

Split

the

upper

CONTROL

LEVEL

and

-

or

off

and

INDICATORS

'UP*,

DOWN',

arpeggiated

or

off

the

arpeggiation

In

whole

is

arpeggiated.

mode,

arpeggiation

split

only.

split

modes,

the

lower

split

CONTROL

KNOB

CONTROL

INDICATORS

UP

and

figure.

mode,

af

In

2-4.

arpeggia

only.

v:f

parameter

GTT

OFF

FREQ:

To

RESONANCE:

ICY

FOLLOW: To

CO

MOD:

I-PF:

oftheVCF(LPF).

To

frequencies

frequency

quency

played

note)

timbre.

To

timbre

To

the

setup

knobs

Set a cut

boosts

change

produce

set a cut

high

off

the

Amplitude

near

setting.

the

according

(higher

to

maintain

musically

shifts.

off

pass

filter.

frequency

of

the cut

off

cut

off

fre

to

the

key

or

lower

the

same

useful

frequency

of

EG

POLARITY

DICATORS

EG ASSIGNMENT/SELECTION

and

INDICATORS

EG

PARAMETER

SELECT

BUTTON

SET-UP

and

BUTTONS

KNOBS

IN

WHEEL

UPPER/LOWER

and

INDICATORS

PINCH

BEND

Sets

the

PITCH

To

change

CUT

OFF

MODULATION The

modulation

rotated

when

DEPTH

amount

of

BEND

WHEEL

the

pitch

FREQUENCY

WHEEL wheel

to

"MINI"

it

rotated

direction,

to

"MAX"

SELECT

CONTROL

pitch

change.

—

CONTROL

has

no

effect

add

direction.

BUTTON

KNOB

when

modulation

it

SPUT

CATORS

COMPERE/EDIT

SELECT

SPLIT

MODE

SELECT

BUTTONS

ON/OFF

BUTTON

RECAUJKEY

and

INDICATORS

TRANS

INDI

-

WRITE

-

CASSETTE

INTERFACE

NUMERIC

VCO

WAVEFORM

INDICATORS

BUTTON

SELECT

-SERVICE

MANUAL-

—

NOISE

CONTROL

DISPLAY

SELECT

BUTTON

and

SAMPLE! I INPUT

BUTTONS

and

PROGRAM

To

select

the

Select

Tape

Sets

MIDI

Sets

and

Select

SELECT

BUTTON

Bank

and

Preset

Interface.

channels.

Split

preset

Number.

ATTCK:

DECAY:

SUSTAIN:

RELEASE:

DEPTH

LEVEL:

Sets

the

amount

Sets

the

amount

Sets

the

level.

Sets

the

amount

after a key

Sets

the

also

is

the

overall

maximum

the

sustain

of

time

(T1).

of

time

(T2).

of

time

released.

deflection

level.

(T3)

amplitude

of

and

Fig.

3-1

IV.

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KEYBOARD

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Frequency

32

Co-Cs

16

C.-Ce

8

C2-C7

4

Cj-Ca

2

C4-C9

Piano

Range

Setting

by

V-

PRINCIPAL

CHORUS

LIOI2B5O3O

PCB

PARTS

OPERATION

LIOI2A5O6O

(B)

LOCATION

PCB

OPERATION(A)

LI0I2A5040

PCB

POWER

TRANSFORMER

Fig.

4-1

FILTER

L600I05080

PCB

-SERVICE

MANUAL-

POWER

SUPPLY

LI0I2BS050

PCB

Fig.

5-1

VI.

ADJUSTMENT

6-1.

BALANCE

OF ± 6V

ON

THE

POWER

SUPPLY

PC

BOARD

Fig.

6-1

POWER

SUPPLY

PCB

Adjustment

Points

1)

Connect

(+6V)

and

POWER

2)

Read

the + Voltage

6-2.

OFF-SET

a

Digital

DC

Voltmeter

Pin 0 (GND)

SUPPLY

PCB

Value

OF

FINAL

as

shown

at

between

of

connector

Fig.

the

VCA

ON

P4

6-1.

[T|,

and

connect

THE

VOICE

[T]

on

the

a

TP.O

piC44

0

TP2

PC

<J

FOFF

JiVRS

J/OFF

Digital

3)

Adjust

GQ

BOARD

SET

IC42

SET

DC

Voltmeter

VRI

so

are

equal

to

that

the

or

within

[4].

Voltage

Value

±

0.1V.

at

|

land

1)

Set

the

ENVELOPE

and

set

the

EG

DEPTH

tion.

2)

Connect a Digital

GENERATOR

Control

Voltmeter

to

between

to

VCA

mode

maximum

TP1

posi

and

GND

-SERVICE

and

adjust

±2mV.

3)

Connect a Digital

and

adjust

VR8

MANUAL-

Fig.

6-2

VR7

so

that

Voltmeter

as

same

VOICE

PCB

the

Digital

between

manner

Adjustment

Voltmeter

TP2

as

VR7.

Points

and

GND

6-3.

BALANCE

OF BBD

OUTPUT

ON

THE

CHORUS

PC

BOARD

■ I kHz

Fig.

1)

Set

CHORUS

2)

Connect

the

3)

Connect

connector

1

control

an

CHORUS

an

PI

kHz

Audio

of

Audio

J2

J3

ICI3

IC10

I

AUDIO

SIGNAL

FROM

OSC

6-3

CHORUS

switch

oscilloscope

PC

Board.

Audio

Signal

on

the

CHORUS

Sine

wave

Generator,

PCB

to

"2".

between

Generator

PC

signal,

and

so

that

TPI

>IC4l > IC5

>

ice I >

VR2

BALANCE

Adjustment

TPI

to

Board,

Adjust output

the

Points

and

GND

on

[I]

and||]

of

and

supply

level

waveform

on

ic9

I

and

Instrument

the

4)

Adjust

and

level.

5)

Connect

adjust

•L

Connection

oscilloscope

VR1

lower

VR2

is

clipped

so

that

the

Clipping

side

of

the

waveform

an

oscilloscope

as

same

between

manner

CLIPPING

a

bit.

as

VR1.

CLIPPING

LEVEL

level

are

the

TP2

and

LEVEL

Fig.

at

upper

same

clipping

GND,

6-4

side

and

6-4.

OFF-SET

OF

IC6

(LF356)

ON

THE

\

/off

CPU

VR

I

set

PC

BOARD

□

Fig.

6-5

CPU

PCB

ADJUST

POINT

1)

Set

to

center

position

of

VR1

on

the

CPU

PC

Board.

SERVICE

MANUAL-

VII.

PC

BOARD

TITLES

AND

IDENTIFICATION

NUMBERS

VIII.

MIDI

IMPLEMENTATION

CHART

MIDI

Implementation

Chart

Version : 1.0

Mode 1 :

Mode 3 :

OMNI

ON,

POLY

OFF,

POLY Mode

Mode

2

4

-SERVICE

OMNI

ON,

OMNI

OFF,

MANUAL-

MONO

Yes

no

SECTION

2

RECOMMENDED

1.

PC

BOARD

2.

VOICE

3.

CPU

4.

CHORUS

5.

OPERATION

6.

OPERATION

7.

POWER

8.

FILTER

9.

PANEL

10.

ASSEMBLY

11.

FINAL

INDEX

BLOCK

PC

BOARD

PC

BOARD

PC

SUPPLY

PC

BOARD

BEND

BLOCK

ASSEMBLY

PARTS

TABLE

SPARE

BOARD

(A)

(B)

PARTS

PC

BOARD

PC

BOARD

PC

BOARD

BLOCK

OF

CONTENTS

LIST

13

14

15

17

18

This

Manual

is

available

produced

LTD.,

Tokyo,

FOR

to

unauthorized

in

any

form

Japan.

INTERNAL

personal.

without

USE

No

permission

-PARTS

ONLY

part

from

LIST-

and

must

not

be

of

this

manual

AKAI-ELECTRIC

may

be

made

CO.,

re

11

1.

This

Parts

List

lists

capacitors,

2.

The

for

3.

Parts

4.

How

a)

Mechanism

2.

HEAD

are

listed

Recommended

service.

not

shown

to read

the

Block

BASE

those

parts

in

the

Spare

Parts

in

the

Parts

List.

BLOCK

HOW

which

are

"Common

List

shows

and

"Common

TO

USE

THIS

considered

for

those

necessary

Service

Parts"

parts

in

the

List

for

Service

6.

PARTS

for

repairs.

from

which

Parts

List

Parts"

will

b)

PC

Board

MAIN

PC

LIST

Other

common

these parts

which

not

should

are

considered

in

principle

BOARD

parts,

such

as

resistors

be

selected

particularly

be

supplied.

and

stocked.

important

and

The

available

5.

When

by

its

PART

NO.

BH-T2023A320A

HP-H2206A010A

ZS-477876

ZS-5

36488

2G-402895

'—SP

(Service

A

small

"x"

shown

in

the

This

number

vidual

parts

This

number

Number.

PC

Board

Part

No.

is

known,

Reference

No.

listed

DESCRIPTION

HEAD

BASE

HEAD

PAN20X03STL

BID20X08STL

SP

CS

Parts)

indicates

Photo

corresponds

index

corresponds

Blocks

Parts

at

BLOCK

R/P

PR4-8FU

CMT

ANGLE

ADJUST

Classification

that

this

or

Illustration.

with

number

are

Index

right

in

that

with

listed

separately.

at

end

of

Part

No.

At

COMPONENTS.

WTIH

MANUFACTURE'S

C

part

is

not

the

indi

figure.

the

Figure-

of

Parts

List

can

FOR

Symbols

[A]:

[B]:

[C]:

[E]:

[J]:JPN(

—SP

—These

be used

to

locate

CONTINUED

for

AAL(U.S.A.)

BEAB(England)

CSA(Canada)

CEE(Europe)

Japan)

(Service

reference

component

Diagrams.

where

SAFETY,

RECOMMENDED

primary

destination—!

[S]:

SAA

[U]:

U/T(Universal

[VJ:

VDE(W.

[Y]:

Custom

Parts)

Classification

symbols

that part

in

is

shown

REPLACE SAFETY

PARTS

(Australia)

Area)

Germany)

Version

correspond

the

with

Schematic

in

Parts

List

12

LBS

COMPOSANTS

DE

t'APPAREIL,

AVERTISSEMENT

CRITIQUES

NE

REMPLACER

-PARTS

OB

QUE

LIST-

SECURTlt

DES

FOUR

PIECES

RECOMMANDEES PAR

MAINTENIR

LE

DEGRE

LE

RECOMMENDED

Because,

repair

these

if

the

parts

can

be

accomplished,

Recommended

SPARE

listed

Spare

PARTS

below

are

we

suggest

Parts

Items.

LIST

on

hand,

that

almost

any

you

stock

REF.

NO.

N

1

N

2

N

3

N

4

5

6

7

8

N

9

10

11

12

13

14

IS

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

PART

NO.

BK-364242

BT-364697 A TRANS

BT-364243 A TRANS

BT-364698 A TRANS

ED-200213

ED-357038 A D

ED-359863 D LED

ED-364261 D LED

ED-357754 D SILICON

ED-301911 D SILICON H DS448

ED-344280 D SILICON H GMA-01-FY2

ED-331626 D ZENER H HZ3

ED-329058 D ZENER H HZ5

ED-319167 D ZENER

ED-306012 D ZENER

ED-346463 D ZENER H HZ7FA

EF-355226 A FUSE

EF-359343 A FUSE

EF-358974 A FUSE

EF-623103 A FUSE

EF-601964 A FUSE

EF-601942 A FUSE

EF-309388 A FUSE

EF-309387 A FUSE

EF-311839 A FUSE

EF-309392 A FUSE

EF-308847 A FUSE

EF-348123

EI-359552

EI-359626 A IC

EI-359628 A IC

EI-355113

EI-364319

N

EI-364246

N

EI-360954

EI-364378

N

EI-364245

N

EI-362710

N

EI-364273

EI-364250

N

EI-364308

N

EI-360228

EI-353227

EI-337228

El-355904

N

EI-364275

N

EI-355906

N

EI-355917

EI-355909

EI-3559I0

EI-364247

N

EI-364253

EI-302233

EI-310036

EI-360025

EI-356049

EI-360036

N

EI-364674

EI-357060

EI-354146

EI-354149

EI-354232

N

EI-364257

N

EJ-364256

EJ-360771

N

EM-364260

EQ-348929

ER-326169 A R

ER-328278 A R

ES-306430 A SW

DESCRIPTION

KEYBOARD

SWITCH

POWER

AD

SILICON

DBA40C-K15

SILICON

DBB10B

LN81

CV-(LF)

SLP-981C-50

DS135D

HHZ6C3

HHZ7

BET T 1.00A

BET T 1.60A

BET T 630MA

SEMKO T 1.00A

SEMKO T 1.60A

SEMKO T 630MA

TSC A 250V

TSC

125V

TSC

AICM523OL

AIC

ICBA715STD

ICCD4051BE

ICCEM3394

1C1R9311

IC

LA6082D

IC

LA6082S

ICLC3517NL-20

IC

LF356N

ICMD6205

IC

MN3009

ICMN3101

ICM5216L

ICM5218L

IC

M74LS04P

ICM74LS05N

ICM74LS14P

ICM74LS373P

ICM74LS38P

ICM74LS42P

ICNJM13600

ICPST520D-2

ICTC4051BP

ICTC4066BP

IC

TC74HC138P

IC

TC74HC139P

ICTC74HC32P

IC

TMM2764ADC

ICUPD7811G-144

IC

UPD8253C-2

IC

UPD8255AC-2

ICUPD8279C-2

OSC

DINJM1704

DIN J TCS5O37-OI

IND

RELAY

125V

M5236L

NJM78M

NJM79M

X'TAL

NR-18

3P

LE

GL-7P201

SIG

G5A-232P

FUSE

ERD2FC

FUSE

ERD2FC

SLIDE

J-S4OI3#O1

15A

ESK-7022

L1012-10

(J)

L1012-30

L1O12-5O

(C,

(E,

200/2.6A

100/1.0A

AK

ORANGE

200/1.0A

F10

C3

250V

0.80A

1.00A

1.60A

1.25A

(C,

1.60A

(C,

V1.2

F05

(B)

250V

(J)

A)

CUSTOM

B2

Cl

A3

AX60

12MC

-241

13P

2TR

12V

S10

1/4W

10ROG

01-2

(E,V,B,S)

61KEY

A)

V,

B, S)

(E,

V,

S)

(E,

V,

S)

(E,

V,

22ROG

-PARTS

S)

"NOTE"

LIST-

N:

New

Parts

13

1.

PC

2.

VOICE

BOARD

PC

BOARD

BLOCK

REF.

NO.

3-1

PART

NO.

EJ-358691

ASSEMBLY

3-IC7

3-BT1

4.

REF.

NO.

4-IClto3,6,7,

4-IC4,8

4-IC5.9

4-IC12

4-TR1.2.5,

4-TR3.4,12,

4-TR6,

4-TR9,10,14

4-D1

4-VR1.2

4-VR3

4-RL1

4-R120

4-C9

4-C24

4-C35,37

4-J3

EI-364674

EZ-358816

CHORUS

PART

10,11,13

8,18

13,16,17

11,15

to

EI-337228

EI-364308

EI-360228

EI-353227

ET-348302

ET-360067

7,

ET-353899

ET-352994

10

ED-301911 D SILICON H DS448

EV-358829 R S-FIX H RH0615CJ4J

EV-364321

EQ-348929

123

ER-364336

EC-355170

EC-360719 C PP V S05

EC-364306 C PP V S05

EJ-353031

PC

DESCRIPTION

SOCKET

IC

BLOCK

IC

TMM2764ADC

BATTERY

LITHIUM

BOARD

NO.

DESCRIPTION

ICM5218L

IC

MN30O9

ICMN3101

ICM5216L

TR

FET

2SK381

TR

2SC333O

TR-2SA1317

TR2SC3401F05

VR

ROTARY

RELAY

SIG

ROMFHS12

CPPVS05CQMFS92

PHONE J 3P

CQMFS92

DILB28P-8J

AX60

V1.2

CUSTOM

BR2032-1HF

C, D F05

T, U F05

S,

T,

U

3P

12P10x0D

G5A-232P

FS

HLJ0520-010

B103

2TR

1W

201J

181J50DC

101J

221J

223

12

V

50DC

3.

CPU

PC

BOARD

5.

OPERATION

(A)

PC

BOARD

14