Ensoniq Corporation EPS-16 Plus Service Manual

Keyboard and

Rack

93120013 01-A

Isnscnial@

THE

TEcHNOLOGY

THAT

PERFoRMS

ENSONIQ Customer Service

Hours: Monday through Friday 9:30

AM

to

6:30

PM Eastern

Closed for lunch 12:15 PM

Time

to

1:15PM

NOTES:

Parts ordering

1-800-441-1003

in

U.S. and Canada:

EPS-J6

PLUS Service Manual

Table

of

Contents

Important

1. Getting

2.

Keyboard

3.

The

TABLE

Things to Know About the EPS-16 PLUS:

Around

EPS-16

the

EPS-16

and

Rack Similarities

PLUS Keyboard Assembly and the Rack

OF

CONTENTS

PLUS . . . . . . . . . . . . . . 1

..

. . . . . . . . . . . . . . 1

KPC

Simulator 1

4. The Disk Drive . . . . . . . . . . . . 2

5. Operating System (O.S.) . . . . . . . . 3

6.

Plastic Case

7.

EPS-16

(EPS-16

PLUS

Rack

PLUS

Screws

Keyboard only) 3

..

. 4

8. High Retention Force Connectors 4

Figure 1 -

Communications Figure

Power

Checking Figure AC

Power Figure Transformer and Testing Figure

2 - Communications

Supply

the Power

3 - AC Line Voltage Check Points . 7

Line Voltage Measurements . . . . . . 7

Supply Measurements . .

4 -

the Power Supply Unloaded

5 - Incorrect

Scribe.

Path

Power

. . . . 4

. . . . . . 5

Path

Supply.

Supply Voltage Check Points 8

Power

...

. . . . . 7

...

. . . . 8

..

. . . . . . . . 9

Supply Voltages (flow chart) . 9

Page

5

Display

Display Self-Test

Self-test

Chart.

Mode.

Troubleshooting

Figure Figure 7 - Figure Figure 9 -

Most

EPS-16

1.

2.

3.

4.

5 . Sound

6.

7.

6 - Footswitch

8 -

Commonly

PLUS

Power Load

Keyboard

Disk Mono Output

Asked

Test

Up

in Sounds

Test

Check . . . . . • • . . . . . . . .

Check

MIDI Test

8. Footswitch

9. Analog

10. Sampling

11.

Output

12.

ESP

13.

ESP

Test

Expander Effects Test 1 Effects

. .

.'

. .

Guide.

No

LEDs

Some

LEOs Lit (flow chart) . . .

All

LEDs Lit,

User Questions

. . . . . . . .

problem

Lit

(flow chart) . . .

No

(flow chart)

Display (flow chart)

Procedure:

........

.

............

(EPS-16

. . . . . . . . . . . . .

and

Headphone Test . . . . .

(EPS-16

Test

Page . . . . . .

. . . . . . .

(OEX-6)

Test

2 . . . .

PLUS

PLUS Keyboard Only)

. . . . . .

.....

Keyboard Only) .

Test

10 10

11

12 13 14 15

16 17

.

17 17 17

18 18 18

18

19 19

19

20 20

EPS-16

EPS-J6

PLUS

Burn-in

Test

PLUS Service Manual

Program

Table

21

of

Contents-1

Tableo!

Contents

EPS-16

EPS-16 Figure Keyboard

Rack Only

Figure

Error

Software

Checking Bootup

O.S.

EPS-16

Figure Section A - Replacing the Section B - Replacing the Figure Section C - Replacing the Figure Section D - Replacing the Section E - Replacing the Section F - Replacing the Section G - Replacing the Section H - Replacing the

PLUS

10 - Trace

11

Messages

Disk

Hardware

PLUS

Keyboard

cut

Only

. . . . . . . . . . . .

..............

- Hardware Notes for the Rack .

. . . . . . .

Notes:

the Software Version

ROM Changes . . . .

Version 1.10 Changes

PLUS Keyboard Only Section

12

- EPS-16 PLUS Keyboard. Exploded View

13 -

14

EPS-16

- Bottom

PLUS Button Colors . . . . . . . . .

of

Case

Notes:

and

Rack . . . . . . . . .

for

Rev A, B,

.'.

. . . . .

or

C Main Boards

...

EPS-16 EPS-16

EPS-16 EPS-16 EPS-16 EPS-16

PLUS Main Board . . . .

PLUS Keypad/Display Board.

PLUS Keyboard . . . . .

.............

PLUS

PLUS Transformer . . . . . .

PLUS PitchIMod Wheel Assembly

PLUS Line Filter . PLUS Disk

Power

Drive.

.

Supply Board.

23 23 23 24 24

25

25 25 26

27

28

29 29

30 30

.

31 31

32 32

33

EPS-16

Figure Section A - Replacing the Section B Replacing the Section C - Replacing the Rack KPC Simulator Board. Section D - Replacing the

Section E - Replacing the Rack Transformer . . . .

Section F - Replacing the Section G - Replacing the Section H - Replacing the Rack Disk

Section J - Replacing the

PLUS Rack Only Section

16

-

EPS-16

PLUS Rack Exploded View

Rack

Rack Rack

Rack

......

.

..

Main Board . . . .

Keypad/Display Board.

Power Supply Board

OEX-6 Board . . . Line

Filter.

Drive.

Memory Expander Board . .

. . . .

.

...

. .

Drawings

Figure 1 - Scribe . . . • . . . . . . . .

Figure 2 - Communications Path . . . . . . . . . . .

Figure Figure 4 -

Figure 5 - Incorrect

Figure 6 - Footswitch problem (flow chart) . . . .

Figure 7 Figure 8 Figure 9 Figure Figure

Figure Figure 13 -

Figure

Hgure

3-

10 -

11 - Hardware Notes for the 12-

14 16

AC

Line Voltage Check

Power

No

LEOs

Some Trace EPS-16

EPS-16

- Bottom

-

EPS-16

All

LEDs Lit,

LEDs cut

Supply Voltage Check Points . . . .

Power

Lit

for

PLUS Keyboard Exploded View PLUS

of

PLUS

Supply Voltages (flow chart) .

(flow chart) . . . . . . .

Lit

(flow chart) . . . . . .

No

Display (flow chart) . .

Rev

A,

B,

Button Colors . . . . . . . .

Case

...........

Rack Exploded View

Points.

or

C Main Boards

Rack

. .

only..

. . . . . . . .

..

...

35

36 37

38

39 39

40 40

41

42

4

5

7

8

9

12

13

14

15

23 24

28

30

.

31

36

Table

of

Contents - 2 EPS-16

PLUS

Service Manual

Important

IMPORTANT THINGS TO KNOW ABOUT

IF YOU OONT

As

with every

Module

Exchange replace complete both for you

The

instructions in this manual

unless otherwise noted.

PLUS, substitute a check of When troubleshooting

will

prevent a faulty option

I.

GETTING AROUND THE EPS-16 PLUS

You will

need:

a.

EPS-16

b.

EPS-16

c.

Communications Test Board

d.

EPS-16

READ

ENSONIQ

ANY

OTIIER PART OF TIllS MANUAL, READ TIllS SECTION.

product, all EPS-16 PLUS service will be handled through

Program. Rather than diagnose

mcxlules.

and

your

We feel that this

customers.

are

PLUS PLUS

PLUS

Where

an

EPS-16

from

Operating System (O.S.) Disk Test Disk (including test sounds)

Musician's

the

KPC

simulator board

PLUS,

complicating your troubleshooting.

Manual

is

for both the EPS-16 PLUS Keyboard

instructions

remove

the

THE

EPS-16

PLUS

the

and

exchange individual components, you will

most

time and cost effective method

say

to

check

on

the EPS-16 PLUS Rack.

any

optional modules that might

the

keyboard

of

the

EPS-16

be

present. This

ENSONIQ repair,

and

Rack

2.

KEYBOARD

The Main Board Rack. However, there are physical differences that ordering parts

different .

AND

and

Power Supply board are the

for.

The disk drive

RACK SIMILARITIES

same

will require

is

the

same for both units. The KeypadlDisplay boards

for

both

the

you

..

EPS-16

to

specify

Instead of:a Poly-Key Keyboard assembly (with KPC board), the Rack has a

KPC simulator

The Board (like

"Keyboard assembly," substitute

see

the

The operating system is only EPS-16

The

PLUS Keyboard and

EPS-16

PLUS built-in. These two expanders Kits)

and SCSI (SP-2 Kit) are options for both.

3.

and

The on

the

THE

IEPS-16 PLUS KEYBOARD ASSEMBLY

the

KPC SIMULATOR BOARD

Poly-KeyTM

RaCk)

necessary, you

Main Board

is a frozen display, therefore, could troubleshooting hints, see Communications Path on

board.

KPC

passes information between

board does for

the

Keyboard

KPC

on

the EPS-16 PLUS

unit).

simulator for

O.S.

Rack.

Rack has

the

OEX-6

are

Output Expander and

options for the Keyboard unit. FLASHBANK

Pressure Keyboard assembly on the EPS-16

is a complex

will

be swapping it out

processed

module

throQgh

that contains its

as

a whole

the

Keyboard assemblylKPC simulator. What might appear to

be

a bad Keyboard assemblylKPC simulator. For

own

unit

pp.

the

KeypadIDisplay board

In the rest

the

Rack (except where otherwise noted).

disk. This disk

of

:ME-16

PLUS

this manual, whenever you

is

the

PLUS

(and the

computer and software.

Display information sent

5-6 and

flow

charts on

PLUS

Keyboard and

which

unit

you

are

KPC

simulator board.

and

the

Main

same

for

both the

.

memory expander

(FB-l

KPC

So,

to

and FB-2

siinulator board

when

and

from

more

pp.

9,

and

12-15.

are

the

be

EPS-J6 PLUS Service

Manual

pagel

Important

IMPORT Each version

ANT! Keyboard assembly

of

the

Keyboard assembly EPROM is optimized for the hardware that is within the

EPROM

Version

(EPS-16

PLUS

Keyboard

keyboard assembly. For more information about the Poly-Key Keyboard assembly, see Service

Bulletins

#9B

and

II.

The 2O-pin Ribbon Cable <Keyboard aSsembly/KPC Simulator) When reconnecting this cable

is

and that the cable

F4

on

the power supply board will blow.

not mis-pinned.

to

the Main Board, make sure that the striped side is aligned with

If

the cable ~ mis-pinned

NOTE:

If

one fuse blows, the other will also blow; you

or

installed backward, fuses F3

must replace both.

When installing assembly cable

the main

4.

THE

board

DISK

keyboard assembly back into the

is

flat under the keyboard assembly and that the ferrite bead is not trapped on top

.

DRIVE

EPS-16

PLUS, be sure that the keyboard

the

Transportinl: a unit

on

There is a printed label near the Disk Drive

of

the

information concerning the care

of

all.

SHIP

WITH

the drive

of

AN

regarding the treatment

recommend nothing

PLEASE

IN A BOX

the

in

the drive at

DO

PACKED

insertion

NOT

an

EPS-16

during

actual

EPS-16

PEANUTS.

These peanuts may cause severe damage

every new unit shipped. This label contains important

PLUS Disk Drive and lists recommendations

transport.

disk

during

PLUS

If

you must, wrap the entire unit in plastic first.

to

the Disk Drive

We

do

not,

transport.

under

Transport the

any

OR A REPLACEMENT

or

Keyboard assembly.

circumstances,

unit

DISK

only)

ENSONIQ

pin and

of

only with

DRIVE

1

What disks to use It

is very important to use double-sided, double-density 3.5" micro-floppy disks.

PLUS writes information to every track

quality Testini

and

certified for double-sided use.

the Disk Drive The best way to test the Disk Drive is PLUS

reads

and writes every track

on

a disk, so

by

formatting a disk. When a disk is formatted, the

on

that disk.

it

is imperative that the disk be

If

the formatting attempt fails,

The

EPS-16

of

superior

it

is likely that

EPS-16

the disk itself is faulty. Always try formatting another blank disk before determining that the Disk Drive is faulty.

sectors when formatting. The entire disk must

.

See Hardware Notes.- Rack Only for notes about the Panasonic Disk Drive.

Unlike some computer systems,

the

EPS-16

be

PLUS does not automatically discard bad

good for successful formatting .

page

2

EPS-J6

PLUS

Service

Manual

5.

OPERATING SYSTEM (O.S.)

An

EPS-16 you have more room for sounds. The ENSONIQ Customer Service for the latest O.S. version). You cannot copy the O.S. which you have already saved instruments or sequences, but not the result

To

- Insert the disk containing the O.S. you want to copy (the source disk) into the floppy

- Press Command, then System-MIDI, then 1 (Envl). The display shows COPY OS

-

- Press Enter-Yes. The display says READING

-

- . Press Enter-Yes. The display shows WRITING

in

update O.S. Version on a floppy disk:

DISK.

Press Enter-Yes. The display says MUST ERASE MEMORY, OK?

sounds or sequences, press Cancel-No and save the data before proceeding.

FORMATTED DISK.

Insert the disk onto which you want to copy the to the disk.

PLUS

an error message.

O.S. takes up approximately 170 blocks on a disk

so

without the

O.S.

O.S. version on the disk can be easily updated (call

to

a disk onto

O.S. Attempts to

If

you need

OS

INTO MEMORY, and then INSERT

O.S.

(the destination disk) into the floppy drive.

OS

TO DISK while the

O.S.

do

to

is being copied

so

drive.

save

Important

on

a disk

will

TO

any

\Vhen it's done,

O.S. to another floppy disk, insert another formatted disk and press Enter-Yes. You

this procedure

-

When

6.

PLASTIC CASE (EPS-16 PLUS Keyboard only)

Avoid Because the structural components (Base, Control panel, and Wheel cover)

great care should be exercised when assembling or disassembling any part of the

Strippin~

Avoid over-tightening screws in

you

the

display reads COPY

as

many times

are

done, press Cancel-No.

Screws

as

you like.

OS

DONE. ANOlHER?

the

plastic case when executing any

If

you want to copy the

are

made

EPS-16

repair

can

of

procedure!

\Vhen replacing hole in the case, making happening, follow these procedures:

a. Before replacing a self-tapping screw

LOCKTITE, Super Glue Gel,

b.

Install the

case. Do not tighten the screw any further. When the glue sets, the screws will hold sub-assembly tightly

It is important and short out something.

any

of

the self-tapping screws,

it

necessary to replace the case

or

RTV into the hole.

screw,

to

and tighten it only until the sub-assembly being attached

in

place.

make sure that there are no loose screws inside the unit,

it

is possible to over-tighten the screws and

or

control panel. To keep this from

(or

screws) into a stripped hole, put a drop

is

as

they may

or

snug against

come

same

repeat

plastic,

PLUS.

strip

two of

the

loose

a

the

Brass Inserts

To

prevent stripping, there are brass inserts

in the four control panel holes. Be sure to use machine screws in these locations.

in

the Main Board ground boss (mounting standoff)

self-tapping screw in a brass insert as this will ruin the insert.

EPS-16

PLUS Service Manual

Do

not

use

a

page 3

and

Important

7 .

EPS-16

Because

disassembling

than 8 inchllbs

8.

HIGH-RETENTION FORCE CONNECTORS (Repair Technicians Label)

In

all

EPS-16

We

just transformers. recommend

benefits

PLUS We

This

using the angled end

These

• Techno-Tool catalog 38, page

•

harness. Watch

have

may

can

Newark

PLUS

the

Control Panel is an aluminum extrusion, great care should

any

PLUS

wanted to let you know that

This

the

of

a high-retention force connector,

found that some units have developed further problems once a module has been changed.

be

a result

be found in the following catalogs:

catalog lID, page 1024, part number 76-1510

RACK SCREWS

part

of

it

of

torque and try

Racks and

means

use

it

will

of

a scribe, screwdriver

out

for thein, and please don't

of

improper handling

of

a scribe (see below).

be

taken when assembling

To

avoid stripping and

to

install the screws into the existing holes in the panel.

in

later Keyboards, there

we

have switched to a higher retention force connector

be very difficult to remove this connector by

or

we

of

cables.

- - ,

Figure

204, part number

to

aid

in

is

similar object

will

be

adding them in other places on the

pull

on

We

suggest removing all cable connectors

1-

Scribe

400PRI44

alignment, you should

warning{mformation label

to

remove this connector.

the wires!

just

pulling.

use

just

no

for We

Due

EPS-16

more

you.

on

our

to

the

,

or

page

4

EPS-J6

PLUS Service Manual

Communications

COMMUNICATIONS PATH

It

is

imponant

Please read this carefully.

The

EPS-16 computer modules communicate with each other using serial communication on

the Keyboard, for example, the Keyboard assembly microprocessor transmits this infonnation

the microprocessor on the Main Board.

The

KeypadlDisplay Board communicates with the Main Board through the Keyboard assembly.

Whenever

Keyboard

control panel, the

turn,

passes

The

communications path

assembly over a two-line asynchronous interface carried cable. 'The Keyboard assembly communicates with the Keypad/Display Board over a three-line synchronous interface which is carried over to the the Keypad/Display Board via the 7-pin Display cable on the cable

on

that you completely understand the communications

PLUS

Main Board, KeypadlDisplay Board

systems in themselves, each with its

the Main Board wants to put a message on the Display,

assembly which then passes

KeypadlDisplay Board sends the message to the Keyboard assembly which, in

it

on to the Main Board.

is

shown in Figure 2. The Main Board communicates with

the

EPS-16

PLUS Rack.

it

own

on

to the Display. Whenever a button is

Main Board via the 20-pin ribbon

and

microprocessor and operating software. The

by

the 20-pin Keyboard

path

of

the

EPS-J6

Keyboard assembly are complete

ports. Whenever a

it

sends the message

assembly

EPS-16

PLUS and the

PLUS.

key

is played

to

the

pressed

cable,

on the

the

Keyboard

ribbon

then

10-pinDispiay

Path

to

up

to

Due

to

the complexity fault when a communications problem occurs. Board,

Test Disk and Bum-in Test Disk are available.

KEYPAD/DISPLA Y BOARD

MAIN BOARD

of

the modules involved,

2O-PIN

RIBBON

CABLE

KEYBOARD!

,

KPC

SIMULATOR

Figure

If

a communication problem occurs (i.e.,

could

be something as simple as a

?f

the

modules. To help you identify a faulty module, a special Communication Test mcluded operation Keyboard

available from ENSONIQ Customer Service. The Communication Test

of

the

Keyboard assembly and can be used

assembly for troubleshooting.

ibad

2 -Communications Path

no

ribbon cable

it

is often difficult

To

facilitate troubleshooting, a Communication

IN

DATA

our

DATA

to

detemrlne which module is

DATA DATA

IN

our

J

,0

()

4)

C

CLOCK

our

7-PIN

CABLE

0115

(~

112

DISPLAY

, ,

,

DATA

our IN

ASYNCHRONOUS

display or no response

DATA

FORT

or

Display cable,

as

DATA

SYNCHRONOUS

~\..

a "known good" module in

our

,

\

DATA

to

or

CLOCK.

IN IN

PORT

button presses

it

could be a

~

Board

or

keys),

problem

Board

simulates

place

of

in

is

the

at

Test

it

one

the

EPS-J6

PLUS

Service Manual

page 5

Communications

IMPORTANT!

When

using Handle the

board shan

the

Communication

board

out

Path

by

the

when

edges

testing,

Test

Board,

and store it

place

an

keep

in

the

anti-static shipping

insulator

in

mind that it is sensitive

bag

(cardboard,

paper,

to

static discharge.

when

not in use.

etc.)

underneath it.

Do

not

let

Attaching the Communications Test

If

an

EPS-16

Keyboard assembly ribbon cable from the Main Board at

from

cable variable. assembly See the

There is and Keypad/Display Board is routed through the Main Board, there is a remote possibility

printed circuit connections between the two connectors

that has a problem communicating with its KeypadlDisplay Board, you may want to between

from the Main

flow

Board

PLUS has a communications problem,

the Communication Test Board into 112. This will eliminate the Keyboard assembly as a

Turn

the system on.

is

not at fault

charts on pp. 12-15 for troubleshooting procedures.

one

funher complication. Since the communications

the

connectors on the Main

EPS-16

PLUS Main Board

atJl5.

If

communication is restarted, however, the Keyboard assembly is at fault.

Using an Ohmmeter, verify continuity between the following points

Board

turn

the unit

-connector 112. Plug the

If

the communications problem persists, you know

are

defective.

Board

at

112

Turn

and

off

the

power

EPS-16

path

and

PLUS

off

and unplug the 20-pin

between the Keyboard assembly

If

you have

unplug the 2O-pin ribbon cable

7-pin Display

20-pin

the

an

EPS-16

verify

cable

Keyboard

from the

Board:

20-pin Keyboard Connector

1

3

PinS

7 -pin DisPlay Connector to

1

to

2

to

3

ribbon

that the

PLUS

continuity

on

the Main

page 6

EPS-J6 PLUS Service Manual

CHECKING THE POWER SUPPLY

Many You

EPS-16

PLUS problems may be related

should check these before troubleshooting the rest

EPS-J6 PLUS

to

a faulty Power Supply, Transformer

of

the unit.

Power

or

Line Filter.

Circuitry

Check and

to

make sure that all the cable connections are secure and correct. Plug the

turn

it

on.

Mter

the

EPS-16

the points shown in Figures 3

procedure described under

Green

TESTING

PLUS has warmed up for five minutes, begin

and

4~

If

the voltages vary outside the allowable limits, follow the

TIlE

POWER SUPPLY UNLOADED before replacing

Line

Filter

Top

Lug

@

NOTE:

come of

the

Figure3

AC

Line Voltage

EPS-16

to

test

WARNING!

There

are

dangerous

Voltages

this

from

transfonner.

To

All

area.

Power

wires

the

present

bottom

-

Check

the

in

",nT""'"

PLUS

voltages

Points

in

at

it

AC

LINE

VOLTAGE

With the power switch OFF,

the proper

AC

Line Voltage

should read from:

2B-IA, 2B-2A, 2B-3B

MEASUREMENTS

(see Figure 3)

With the power switch ON,

the

proper

AC

Line Voltage should read

2B-IA, 2B-IB, 2B-3B, 2B-3A

There should be no voltage across the

from:

power

switch.

EPS-J6

PLUS Service Manual

page

7

EPS-J6

PLUS Power Circuitry

POWER The voltage and part number Transformer.

SUPPLY

The

Power Supply part number is silk-screened on the left side

MEASUREMENTS

of

the Transfonner is denoted by the label on the top

of

the

of

the Power Supply

PC board.

I F2 J

1.5

Amp,

25

v

I

FI

dAmp,25 V

~

F5

The Transformer part numbers for the EPS-16 PLUS are:

100V 1450000622 230V 1450000252 120V 1450000242 240V 1450000832

TRANSFORMER The proper AC Line Voltage for each EPS-16 PLUS should

AND

POWER

SUPPLY

VOLTAGE

be

CHECK

printed on the top

POINTS

of

the Transformer. Figure 3 shows the checkpoints for reading the AC Line Voltage. Figure 4 shows the connector terminal numbers for the Power vary +/-

10%.

Supply and Transformer. It is normal for Line Voltage to

The following chart lists the voltage ranges for proper operation appropriate terminals

De~i&nali2n

to

read across with the volt meter (refer

I~rmiDals

CQDD~s:tQ[

to

AIIQ!fa.bI~

+

Digital

Analog

Display +VA

-VA +5 Analog +VDigital +5 Memory +5 Digital

+5X

-35 FIlament Display Offset

+.5X

Supply

Fllament

1 4 7

10 12 14 15 16 18

3 6

9

11 11

13 13 13 17

24 23 25 23 27 28 27 26

J4

13.00 J4 22.00 J4

J1 J1 J1

11 11 11

13

J3 J3 J3

4.70

+20.00

-20.00 +4.75 +7.20 +4.75 +4.75

+4.75

-29.00

4.70

-22.70

19 20 J2 +4.75

of

each supply (fully loaded) and the

Figure 4 for terminal locations):

[aD&~

18.70 VACrms

to

28.60

to

6.05 VACrms

to

+28.00

to

-28.00

to

+5.25

to

+12.10

to

+5.25

to

+5.25

to

+5.25

to

-37.20

to

6.05

to

-31.50

to to +5.25

Units

VACnns

VDC VDC VDC VDC VDC VDC

VDC VDC

VACnns

VDC VDC

page 8

EPS-J6 PLUS Service Manual

EPS-J6

PLUS

Power

Circuitry

TESTING

If

the

Power

THE

Supply tenninals 18 and component

Power

on

SuppIy unloaded before proceeding.

Tum

Verify

POWER SUPPLY UNLOADED

readings exceed the indicated tolerance (particularly the +5 Digital

17

or

+5

Memory line between terminals 16 and 13)

the

Main

Board

Incorrect

present

Tum

the

main

power supply voltages

the

unit

OFF

the

Turn the unit ON.

the

unit OFF. Disconnect

Keyboard cable from the

board. Turn the unit ON.

is drawing the Power Supply down.

Check the fuses.

proper Line Voltage is

YES

INCORRECT

SUPPLY VOLT AGES

===_---NO--

it

is possible that a defective

In

this case, you

....

~~An

better nowJ

line

should

POWER

between

test

the

YES

Turn

the

unit

OFF.

Disconnect the cable

between

Keypad/Display Board.

Tmn

cable

the main board.

the

the unit

between

power supply and the

YES

OFF.

the

power supply and

Tmn

the unit

==----NO

Disconnect the

the unit ON.

==---NO---1~

ON.

( Replace

...

NO

---IPl~

Simulator (see Section C). .

~

Board

the

Keyboard/KPC)

Replace

Keypad/DisplayBoard

(see Section B).

Replace the

(see

the

Main

Section

A).

EPS-J6

YES

Replace the Power Supply

Board (see Section

PLUS Service Manual

D).

Figure 5 -

Incorrect Power

Supply Voltages

page

9

Display Self-Test Mode

DISPLAY

When communication with the test mode, the Display remains various control panel buttons will cause the Display to print characters, home the cursor, etc.

Using

1.

If

prints

indicates the problem is either the Main Board Board, Keyboard assembly and the KeypadlDisplay connections, particularly the 20-pin cable to the Keyboard assembly.

If

pressing buttons indicates a defective cable connection (20-pin ribbon cable) between the Keyboard

2.

If

chart not Self-test mode.

If

you

mode using the follOwing procedure. With the power off, face the front

SELF·TEST

the KeypadlDisplay is receiving power from the Power Supply but is not in proper

Self·test

the

unit

out

the

unit

below, the problem is most likely in the KeypadlDisplay

function properly during normal

can't isolate a problem that seems related to the display, the display can be forced into Self-test

Mode

comes

characters when control panel buttons are pressed according to the chart below) this

assembly or possibly a bad Keyboard assembly.

is

in

MODE

Main Board, the K.eypad/Display Board enters Self·test

blank:

until you press the buttons on the control panel. Pressing

to

Diagnose

in

with a blank

ca~ses

Self·test

only the leftmost character

mode

the

Keypad/Display

display,

but

the

EPS-16

Assembly

but

is

in

Self·test

or

the communication link between the Main

Board

of

display

PLUS operation, test them while the display is

Before replacing anything, check all

the display to change, this usually

does

not

respond

Board

of

mode

Main Board and

If

the unit, then:

mode.

(i.e., the Display

according

certain buttons

In Self-

to

the

do

in

Jumper the left power the Keypad/Display Board independently.

The Chart below details how the control panel buttons are mapped in

up, the display will stay

Eri:ss:

LOAD

COMMAND EDIT INS1RUMENT

SEQ-SONG SYSTEM:-M1DI EFFECTS

l/ENV 2/Er:..c"'V2 3/ENV3

4/PITCH

5lFILTER

61AMP

71LFO 8/WAVE

9/LAYER O/I'RACK UpArrow

1

(-)

side

DiSula!

of

C19 (located below the MIDI

in

Self-test as long as the

Bi:ads:

8

$

1.

3 9

+

0 Instrument-Track 4

1

Pri:SS: Down Arrow Left Arrow Right Arrow CANCEL-NO

EIDER-YES Instrument-Track 1 Instrument-Track 2

Instrument-Track 3 ,

Instrum.ent-Track 5

Out

jack) to pin 13

jumper

is connected, allowing you to check

6 Instrument-Track 6 (Home Cursor)

7 Instrument-Track 7

<

=

(Home Cursor) (Home Cursor)

*

3.

Instrument-Track 8 EFFEcr SAMPLE

SELEcr-BYPASS

RECORD

STOP/CONTINUE PLAY

of

U20

Self-test mode:

DiSula!

Ri:ads:

4.

.

/

?

(Home Cursor) Space

&

2

"

5.

4

2.

>

o.

5

6.

(WD

1772).

On

pageJO

EPS-J6

PLUS Service Manual

TROUBLESHOOTING GUIDE

Often is dead

the

faulty module

difficult to isolate the problem. The following flowcharts can help you diagnose

(no

display).

in

an

EPS-16

PLUS can be determined through normal use. Sometimes,

Troubleshooting Guide

it

units

that appear

When present prevent

Memory

procedure

The

Troubleshooting

If

the

troubleshooting an

(such

as

the memory expander, SCSI Interface or

a faulty expander from complicating your troubleshooting. The procedures

Expander and the SCSI Interface are included with the corresponding expander. The

for testing the

following pages include troubleshooting flow charts:

~Problem

9 Incorrect Power Supply Voltages

12 Footswitch problems

13

14 15

one

or

both of the footswitches do not operate properly, make sure that the footswitches

proper

mode (on the Edit/System·MIDI page). See Section 2

an

EPS-16

OEX-6

EPS-16 EPS-16 EPS-16

EPS-16

PLUS, always disconnect any expansion devices

OEX~

can

be

found

on

p. 19.

PLUS with PLUS with Some LEDs Lit PLUS with

No

LEDs Lit

All

LEDs Lit,

Output Expander). This

No

Display

PLUS with a Footswitch Problem (see

of

the

EPS-16

Manual) for more information. .

The

SUSTAIN SW-l. is

On

The

the

Dual

the Edit/S MIDI system· . page:

Fr

SWITCH parameter corresponds to the right pedal

AUX

FT

SWITCH parameter corresponds to the left pedal

Footswitch (piano-type) available from ENSONIQ. .

Footswitch

SUSTAIN

SW

-1 single footswitch,

. SW-5 right pedal

FT

SWITCH

or

AUX

SW

-5 left pedal

of

SW-5

of

SW-5

FT

SWITCH

or

that

for

Figure

PLUS

single

only.

may be

will

testing the

6) are

set

Musician's

pedal

The

SW-5

to

Default

Option

If

the

footswitch mode is correct and the footswitch still doesn't function properly,

problem

Although the footswitch to.

the

mlcroprocessor.

with the

KeyboardIKPC by the 2()-pin ribbon cable, where they are sensed by the KeyboardIKPC

Main

right

Board, the

jack

is

EPS-16 PLUS Service Manual

SUSTAIN

PATCH SL button

- left PATCH SEL button

KeyboardIKPC

mounted on the

OFF

sequencer

or

the 2O-pin ribbon cable

Main

Board, the footswitch signals are carried

START/STOP

connecting

there

is either a

the two.

over

page

11

Troubleshooting Guide

TROUBLESHOOTING

~-NO

YES

Set both footswitches to act

Edit then System-MIDI, scroll to

Press

SUSTAIN FI' SWITCH (right or single pedal) and

up

press the

Scroll right

Select

on

Instrument. Pressing either footswitch should

cause

arrow

once

to

and

set it

PIANO

the

·Iefunost two characters

241. Press Edit, then double-click

appropriate

as

Patch Select Buttons.

button to set it AUX

Fr

SWITCH (left pedal)

to

PATCH SEL.

patch

indicator

of

the display.

to

PATCH SL.

to

change in the

WITH

AN

A FOOTSWITCH

EPS-16

PLUS

PROBLEM

~----YES---""

NO

Turn the unit OFF. Attach the communications

test board.

nonnally. The display will

FAll...ED-TRY

Load

Tum

the unit ON and

AGAIN?

in and then select PIANO 241.

Set

both

footswitch to act

Select Buttons (see above).

Replace Keyboard/KPC

Board (see Section C).

Press Cancel·No.

YES

boot

show'"

KBD

as

Patch

~--NO

Simulator'

it

up

...

If

your

an

edge

message will

Replace the

(see Section

Figure 6 -

Footswitch Problem

communications

connector

(4090013601)

not

appear.

Main Board

A).

test

board

this

has

page 12

EPS-16

PLUS

Service Manual

Troubleshooting Guide

NoLEDs

YES

lit.

YES

NO

TROUBLESHOOTING

EPS-16 PLUS WITH

NO

YES

AN

NO

LEDS LIT

Check

KeyboardIKPC

20-pin

connnection

ribbon

cable

improper

for

..

NO

i

Test

the

power supply

: unloaded. Go

Power

Supply Voltages .

flow chan, p. 9.

to

Incmrect

Replace the

YES· KeypadlDisplay

Board (Section

B).

Figure 7 -

NoLEDsLit

E~S-16

PLUS

S~ice

Manual

page

13

Troubleshooting

Guide

YES

>--NO

>-

TROUBLESHOOTING

WITH

Test the

unloaded.

__

Power

NO _

Supply Voltages

flow chart

........

Repaircable

JIll""

and retest.

SOME

power

Go

to on

AN

EPS-16

LEDS

supply

Incorrect

p. 9.

PLUS

LIT

YES

Place

lead

scope ground on the left

(negative)

on

pin 4

of

J15-DISPLA Y.

YES

Replace

KeypadlDisplay board

(see

Section

C19

the

B).

and

probe

>--NO

Replace the Main Board

(see

Section A).

Figure 8 -

Some LEDs Lit

page

14

EPS-16 PLUS Service

ManZllll

ALL

NO

DISPLAY

LEDS

YES

LIT,

:>---

TROUBLESHOOTING

WITH

NO

ALL LEDS LIT,

Test the power supply

...

--Ir.c

unloaded.

Power Supply Voltages

flow chan, p.

Troubleshooting

AN

EPS-16

NO

DISPLAY

Go

to Incorrect

9.

Guide

PLUS

Force

the

unit

into self-test mode:

Jumper the negative (left) side

C19

to

13

of U20.

YES

of

~--

>-

__

NO

--Ir-

___

...

Replace

KeypadlDisplay Board

(see

Replace

Board (see Section A).

the

Section B).

the

Main

EPS-16

YES

Replace

Simulator board (see Section C).

PLUS Service Manual

the

Keyboard/KPC

">---NO

.c

Repair and retest. )

Figure 9 -

All LEDs Lit,

No

Display

page

15

User Questions

MOST The following questions are the most commonly asked Representatives (CSRs) resolve these situations

Question:

CSR:

COMMONLY

How do I Mix a Track

Sequences (Tracks)

1)

Set RECORD

2) Select the Instrument-Track

3) Press Edit then Track, scroll left

4) Set mix to the desired value

5)

Hold

6)

Let the Sequencer play one bar

7) Press

8) Answer YES

In

Song Mode

1) Chain sequences into a Song

2)

Set RECORD

3) Select the Instrument-Track

4) Press

5)

Hold

6)

Mix Track through entire Song using the with PED=VOL

7) Answer YES

ASKED

Record

USER

or

MODE

and

press Play

QUESTIONS

over

a Song?

to ADD (see Section 8 o/the Musician's Manual)

Stop

to

KEEP=OLD -

MODE

to

ADD

Edit then Track, scroll left

Record

and

press Play

to

KEEP=OLD -

the telephone daily.

NEW

by

end

to

NEW

users. Our Customer Service

MIX

Data

Entry Slider

or

the

CV

Pedal

Question:

CSR:

Question:

CSR:

Question: CSR:

The

EPS-16 mode. You must have

Why won't the WS=1 contains the actual wavesample information for the

for the Upper.

WS=17. Therefore. isolate the desired wavesample(s) as follows:

1)

Create

2) Create a

PLUS will

O.S. version 1.1

EPS-16

All

not

record a sequence from external sequencer

or

higher.

PLUS

other wave samples

let

me

edit

(30

a new Instrument (see Section 3

new

Layer

in

that Instrument (see Section 7

converted Mirage sounds?

Lower

of

them) are copies

o/the

MusiCian's

Manu.al)

o/the

of

Musician's

Manuol)

3) Copy desired wavesample into the

new

Layer

(see

Section

6o/the

Musician's Manual) .

4) Truncate the new wavesample (see Section 6

5)

Edit as you wish

Why

do

some other manufacturer's instruments crash when played from an EPS-16 These instruments cannot handle the vast amount generates. Turn the INSTRUMENT, as follows:

1) Press

2)

3)

4)

5)

6)

PLUS keyboard?

key

pressure settings

Edit, then

Scroll to BASECHANNEL PRESSURE=KEY

Change

Press

Scroll to PRESSURE MODE=KEY

Change

it to

Edit, then

it to

System-MIDI

CHANNEL

Instrument

CHANNEL

or

OFF

(see Section 3

or

OFF

to

(see Section 2

o/the

Musician's Manual)

of

MIDI

data

CHAN or OFF

o/the

Musician's Manual)

o/the

Musician's Manual)

that Poly-Key

on

MIDI and each

in

MUL

sound, WS=17

WS=1

or

11

pageJ6

EPS-J6 PLUS Service Manual

EPS-J6 PLUS Test Procedure

EPS-16

The

troubleshooting (model connected to a sound system in stereo.

If

it down the problem. Keypad/Display problem, you should test this module

1.

Power

a. b.

2.

Load information) .

a. Eject b.

c.

PLUS

following procedure will ensure the thorough testing

SW-5),

is

not

known

Tmn

should read Insen (Keyboard unit only)

is tuned, all LEOs should go out.

in

Load The display will say LOADING <filename> and the top yellow LED (redlorange Rack) The (redlorange on the Rack) stays on. The following sounds Instruments-Trackl through 6:

TEST PROCEDURE

the

unit

To

do the following tests you will need a

and

a Control Voltage Pedal (model CVP-l). The EPS-16 PLUS should be

whether the KeypadlDisplay board is good, it can cause confusion

If

you

do

not have known-good correlation modules and suspect a

Up

(see

Section 1

unit

on.

All

ENSONIQ

O.S.

disk.

Sounds (see Section 1

the

O.S. disk. Insert the Test disk.

bank IN-OUT BURN from the

will blink while loading.

file

is

done loading when the display shows FILE LOADED and the top yellow LED

of

the

EPS-J6

the LEDs above the Instrument-Track buttons should light

EPS-16

The

display should

will

then display TUNING KBD - HANDS OFF.

of

PLUS

PLUS, then PLEASE INSERT DISK.

read

the

EPS-16

Musician's Manual for more information)

LOADING

PLUS Musician's Manual for

test

disk (press Load, Instrument, Ente,..Yes).

of

the EPS-16 PLUS and

M1DI

cable, a

fIrst (see Self-test Mode p. 10).

SYSlEM.

will

The

be loaded into the

also

Dual

in

and

EPS-l6

When

more

will aid

Footswitch

tracking

the display

PLUS

the keyboard·

on

in

the

Instrument Instrument 2 Instrument 3 Instrument 4

Instrument 5

Instrument 6

3.

Keyboard Test (EPS-16 PLUS

a. Select PRESSURE (lnstrument-Track2). b.

Playa key travel ends.

c.

Press the key into the pressure zone

d.

Using PRESSURE play all six when the key is pressed down hard.

chromatic scale across the entire keyboard. Press each key down only until normal

1

PIANO 241 PRESSURE

6-0UTlEST

20 VOX

SAMPLEINST

lEST

3 BUS TEST

Keyboard

Do

not press into pressure zone. Verify that no pressure

and

verify that pressure causes a pitch

"c"

keys and verify that the pitch rises 1 octave smoothly

Only)

effect

bend.

* Failure indicates a Keyboard problem.

4.

Disk Check

a. Select PRESSURE (lnstrument-Track2). Save PRESSURE back to the disk. Press

Command, and double-click

INSTRUMENT, press Enter-Yes.

b.

The display will show NAME= PRESSURE. Press down arrow ORES SURE.

c.

Press Ente,.. Yes. you save this sound). Press

COMPLETE

d.

Eject the test disk

The

display will say

will

appear briefly when fInished). and

then press Load. Verify that the display shows DISK DRIVE

READY.

on

the

Instrument

Ente,.. Yes

button. The display shows

DELElE

to

OlD

VERSION? (except

save ORESSURE (DISK

to

change

COMMAND

SA

the

occurs.

VB name

to

fIrst time

NOT

EPS-J6

PLUS Service Manual

page

17

EPS-16

S.

6.

PLUS

e.

Reinsen

BURN.

f.

Eject in

g.

REPEAT

*

If

2) disk drive cables,

Sound

a.

Select

keyboard to verify that

b.

Select

keys. Twenty notes

that

c.

Select

in

Test Procedure

the

test

disk

and

then press Load. Verify that the display shows

the test disk

the

display.

there

step

is

and

then reinsert the test disk and press Load. A file

If

the message

f5times.

a failure, check the components in the following in

3)

Check

PIANO 241 (Instrument-Track1).

PIANO

20

VOX

there

are

3 BUS

succession.

JEST

no

TEST

(Instrument-Track4). Press and

will

play

missing notes, distortion on a note, etc.

(Instrument-Track

* Failure indicates a main

Mono

a.

b.

c.

d. e. f.

Output

Select Unplug keyboard Plug

in

high

and low

the

right).

Plug

headphonesdlrect1.y into headphone jack. Playa Reconnect the audio cables.

and

Headphone Test

PIANO

the LEFTIMONO output cable and verify that both the high

the

few notes

241 (Instrument-Track1).

are

heard

in

the

RIGHT output (there will

Left

cable

and

unplug the RIGIIT/MONO output cable and verify

end

of

the

keyboard are heard in the LEFT output (there will

to

check

for stereo and sound qUality.

DISK

DRIVE NOT

Disk Drive, and 4) Main Board.

241 pans

in

succession with the last note dropping

board

problem.

* Failure indicates a Main Board problem.

Playa

from

6).

left to

Press

READY

bit

to check sound quality.

right

one

be

appears

hold

down the three

key

and

no

output from

you should

FILE 1 IN-OUT

name

should

then

FAn..

order:

Play

lowest

an

octave. hear

and

low

end

the

left).

that

be

no

appear

the unit.

1) disk,

up

the

white Verify

3 notes

of

the

both

output

play

the

from

7.

MIDI

a.

b. c. d. e. f.

Test (EPS-16 PLUS Keyboard Only)

Select Connect MIDI

Hold Disconnect When Play

PRESSURE

In

down a few

one

you

release the keys,

twenty

or

more

(Instrument-Track2).

to

MIDI

Out

with a MIDI cable.

keys.

end

of

the

MIDI

the

keys simultaneously

cable.

notes should sustain. .

* Failure indicates a Main Board problem.

8.

Footswitch

a.

Plug

b.

Press

c.

Press

d.

Create a

(right)

pedal.

*

If

the

Tests

the

Dual

Footswitch into the Ft. Sw. jack

Edit,

the

System-MIDI

the

up

arrow

shon

sequence by

pedal

to

verify

Press

Cancel-No.

footswitches

button to

holding

that

sustain works, then stop the sequencer using the

do

not operate correctly, see the Oowchart

and

scroll to

change

it

down Record

to

reinitialize the voices.

on

the back

AUX

FT

SWITCH = OFF.

to

AUX

FT

SWITCH = START/STOP.

and

pressing Play.

of

the

EPS-16

PLUS.

Use

the

sequencer

on

sustain

(left)

p. 12.

page 18

EPS-J6

PLUS

Service

Manual

9.

Analog a.

b. c.

Test

Page

Plug Volume Pedal (model CVP-l) into the Pedal-CV jack. Go to the Analog Test Page (press Command, Env ANALOG INPUTS is displayed, then press Ente,..Yes). Examine the analog inputs using the following procedure:

Up

Press the

reading. Verify that the values

Arrow button to select

are

as follows:

the

appropriate input, then press Ente,..

EPS-J6

1,

scroll right until EXAMINE

PLUS

Test Procedure

Yes

to take a

Down

o o o o

Yes

to

Supply

it

is

and set

(Mr. Knob), you must scroll right so that

take readings.

up=<>

with

failure

most

likely a problem

LOAD

it

Play

play

1)

2) MODWHEEL

3)

4) PEDAL (CV)

When testing the Data entry slider underlined. Press

5)

. Scroll left then

6)

*

Failure could readings

10.

Sampling

a.

Plug the microphone into the Audio In.

b.

Press Sample, the display shows

c.

Eject the test disk and insert the O.S. disk

d.

The display shows PICK SAMPLE INST. Press Instrument-TrackS, then Enter-Yes the

e.

Scroll right to INPUT

f.

Press Ente,.. Yes

are

g.

Press Cancel-No to stop sampling.

h.

Press the

Controller PITCH WHEEL

VOL~(slideD

Enter-

MR. KNOB (data slider) 0 255

up

to test the Patch Select Buttons.

PATCH (select buttons) both

indicates a problem

indicate a Power

are

off,

then

Test

VU

meter.

LEVEL

and

sample by speaking into the microphone. You should

sampling at the Audio Output.

Up

Arrow button once and

J. Unplug the microphone from the Audio In jack.

*

Failure see

indicates a Main

Section 5 of

the

Board

EPS-16

problem.

PLUS

lI12

127 127 127 127

right=32 left=64 both=127

the

corresponding

or a Main

OS

DISK-mT

and

to MIC, then scroll back to the

the sample and listen critically.

the sample

Center 64

unplugged = 127

part,

Board

with

EN1ER.

then press Ente,..

in

BACKWARD,

For

more

information

although

problem.

the

Main

Yes.

VU

Musician's Manual.

(Rack-always=O) (Rack-always=O)

the

value is

it

also

If

all

Board.

for

meter

..

hear

what

you

NO

LOOP mode.

on

Sa~pling,

11.0EX-6

When troubleshooting an

need

to

determine whether the EPS-16 PLUS

OEX--6 with another

The operation a.

Load and select the sound called 6-0UT TEST.

b.

While playing the same note should hear a single square-wave tone should

Note that the

plugged into a suitable line-level pre-amp such

*

If

the

of

the OEX--6 can be tested using the following procedure:

be a semitone higher in pitch than the previous output.

OEX--6 outputs

EPS-16

EPS-16 PLUS Service

EPS-16

PLUS

Manual

EPS-16

PLUS.

on

are

itself

PLUS with an OEX--6 that is not operating properly, you will

or

the OEX--6 is at fault. Ifpossible. try the

or

try

the problem

the keyboard. listen to each

in

each output and the tone in each successive output

not designed to drive headphones directly and should

is

defective,

EPS-16

as

a mixing board.

the

problem

PLUS

OEX-6

is

in

with

a different

output individually.

OEX-6.

be

the

Main

Board.

page 19

You

EPS-16

12.

ESP a. b.

PLUS

Test Procedure

Effects Test 1

Eject

the

O.S.

disk and insert the Test disk.

Press

Enter-

Load

then Instrument. Scroll to the Bank file FILE 2

Yes.

Wait

for all the instruments to load. The following sounds will

the

Instruments·Trackl through

8:

FX

TEST 1 and

press

be

loaded into

Instrument 1 Instrument Instrument 3 Instrument 4

Instrument 5 Instrument 6

Instrument 7

Instrument 8

c. Select each instrument

clarity, noise etc. Also watch

13.

SYS1EM

*

Failure

ESP

Effects Test 2

a.

Press press

loaded into the Instrument·Trackl through

Instrument 1

Instrument Instrument 3 Instrument 4 Instrument 5 Instrument 6 Instrument 7 Instrument 8

ERROR ###

indicates a Main

Load button then Instrument. Scroll to the Bank file FILE 3 Enter-Yes. Wait

2

PIANO ROOM REVERB

~REVERB

HIFIREVERB DUAL HIFIDELAYS PHASER+REVRB CHORUS+REVRB

one

or

the outputs playing dry instead

for

PIANO FLANGER+REV

CHOR+REV+DDL

ROT

CMP+DIST+REV DIST WAH+DIST +REV

SPLASH1EST

241

DELAYS

at

a time and play

for

ESP

download errors as an instrument

Board

problem.

it

Listen for

ESP

effects problems, sound

is

selected (either a

of

with effects).

FX

TEST

all the instruments to load. The following sounds will be

8:

241

SPKR.+REV

+OIO+REV

2 and

b.

Select each instrument

clarity, noise etc. Also watch Download dry instead

* Failure indicates

page

20

errors

will show up

of

with effects.

.a

Main

one

at

a time and play

for

ESP

download errors as an instrument

as

either a SYSTEM ERROR ###

Board

problem.

it

Listen for ESP effects problems, sound

is

selected.

or

as the outputs playing

EPS-J6

PLUS

Service Manual

EPS-16

PLUS Burn-in

Test

Program

BURN·IN

To

run the Bum-in Test Program, you

-

The

Bum-in There components, and

The

continuous operations test Keyboard, Registers, and

approximately every ten minutes automatically detected

BURN·IN

1.

Plug MIDI the and

2.

Power is

3.

Once

are

TEST PROGRAM

One

EPS-16 PLUS Burn-in

One

MIDI

Cable

One

1/4"

Mono to 1/4"

One

1/4"

Stereo to 1/4" Stereo cable

Test Program is

are two test operations that the program

2) a keypad integrity test.

Sustain Footswitch,

E.SP

Instruction Registers. The

in

Mono

used

the

all operations.

TEST

Loop

Cable into MIDI In and MIDI Out jacks. Plug

Audio Out/Left and

Ft.

Sw.

jacks.

up the unit and insert the BURN-IN

not

write-protected (i.e.,

the

disk has been loaded, the display will read:

pressed the Bum-in Test cycle will begin automatically after twenty seconds.

PedaZ-CV

the

must

have

Test

Disk

cable

at

ENSONIQ

Dynamic

Aux

Footswitch.

and

take about five minutes

jacks.

window

to

can

RAM,

Disk

Plug

TEST

must

the following items:

exercise the system hardware

perform:

Disk

Drive

the Stereo to Stereo cable into the Headphones

DISK

be closed).

1)

A continuous (bum-in) test

Drive Read

Drive

Index

Read

to

run. Failures

VER.

DISK

and

Write,

Pulse,

and

Write tests are

the

Mono to

X.x.

making

TEST

COUNT

of

a complete unit.

MIDI

ESP

RAM,

run

of

components can

Mono

certain

XXX.

of

InIOut,

ESP

GPR

cable into

that the

If

no

all

buttons

be

disk

NOTE:

when test and

USABLE.

4. NOTE:

begin the Bum-in Test cycle.

start

S.

6.

7 • Press Enter-Yes.

S.

9.

The

''Disk

Test Counter" is

a test disk becomes· unreliable.

is done. After about two weeks

the disk

Press

the Bmo-in Test cycle.

Press Ente,.Yes. All the special segments

display will.read: Press display

ENTER. Press panel press the leight Instrument-Track buttons). OK-HIT

Press indicate which

the display

will

not boot the

Contact

Enter-Yes.

If

you wish. press Cancel-No

Ente,.

will

ENSONIQ

The

LEFT

Yes.

All

read:

RIGHT

All

Enter-Yes.

buttons

ENTER

Ente,.Yes to

will

The

in

any order.

TO

start

of

the tests

read. TESTING DYNAMIC

system

display will read: DO

SIDE

the

special segments

the

LEDs

display will read.:

START.

the Burn-in Test cycle.

is

used of

Customer Service

The

display will read:

ON-HIT

SIDE

ON-HIT

will light

All

the

cmrently active.

to automatically monitor

The

"counter"is increased by

continuous

properly. Instead,

to

by-pass the Button

ENTER.

LEDs

Bum-in

the

fora

replacement disk.

BUTTON

OK-HIT

on

the

left·side

on

the

right

EN1ER.

and

the

display will read: LEDS

PRESS will

Once

EVERY

flash as each button is pressed

all the buttons are pressed, the

As

If

the Dynamic

RAM.

test

one

Testing,

display will read:

TEST?

and

the

Display

ENTER

of

the

side

of

the display

BU1TON.

the

Bum-in

Test

Ram

disk usage

every time a

"counter" will reach its

tests

TO

START.

display will

Press all

runs, the

is being tested,

and

DISK

and

light

will

light

ALL

(don't

display

to

DISK

NO

immediately

Go

and the

ON-IDT

the

control

forget

for

indicate

WRITE

limit,

LONGER

to Step 9

and the

to

will read:

will

example.

to

EPS-16

PLUS Service Manual

page 21

EPS-J6

PLUS

Burn-in Test Program

BURN-IN

1.

If

there is a failure in any

LEDs

2.

To performed is finished the display Ram Pressing

3 .

status

status Once cycle

4.

Pressing number

Test

Failed DYNAMIC DISK DISK N.lIDI IN/OUT Check cable continuity and cable insertion, KEYBOARD Keyboard cable, Keyboard SUSTAIN

AUX INDEX ESP ESP ESP

FAILURE MODES

of

the tests, the special segments

will flash alternately. The test cycle

determine which test has failed, press Cancel-No. When the test that

will

has passed, for example, the display will read DYNAMIC

any

of

the arrow keys will cause the program to page through and display the pass/fail

of

each

of

the eleven tests. Once the failed test has been located, you can clear the pass/fail

mode

by pressing Cancel-No. This should be done

all

failure status indicators have been cleared, press Enter-Yes to restart the Bum-in Test

at

the displayed

the

of

Iterations

xxxxx

Test

Edit

times the test has failed. The format is shown below:

test

button

will

display the number

Test Failures

xxxxx

Problem in order

will

continue.

indicate a "PASS/FAIL STATUS" mode.

of

times the test has been performed and the

of

likelihood

RAM Main Board

WRITE Test Disk, Disk Drive cable, Disk Drive, Main Board

READ Test Disk, Disk Drive cable, Disk Drive, Main Board

FOOTSWITCH Check cable continuity and cable insertion,

PULSE (Disk Drive) Disk Drive cable, Disk Drive, Main Board

RAM

GPR

REGISTERS Main Board

INSTR

REGISTERS Main Board

Main Board

in

the display

RAM

ONLY

(xxxxx = 5 digit count value)

and

the control panel

is

currently being

If

the Dynamic

GOOD.

as a diagnostic function.

Main

Board

Main

Board, Keyboard

Main

Board, Keyboard

page 22 EPS-J6

PLUS

Service Manual

Hardware Notes

HARDWARE EPS-16

PLUS KEYBOARD AND

FLASHBANK

On Rev C

and MIDI Thru FLASHBANK FLASH

DO

ON

NOT

REV

make

FORMAT

CUT

D (or

this

For best

results,

see Keyboard

NOTES

RACK

Format

jack) a trace

Errors

lower

Main

cut must be made in order for the unit to work properly with a

option

(see

ERROR message

boards ONLY (4001013501 with

Figure 10).

If

this trace

when

formatting a FLASHBANK.

is

not cut all the way through,

Rev

letter is located next to

you

THIS TRACE

hi"gher)

38

sure

feedthru

be sure that the EPROMs are version 1.ooF or higher. For more information,

and

BOARDS

31

:>

the

trace

to

is

cut.

CUT

...............

'-Lo

Figure

Rack Similarities on

10 -Trace cut for Rev

p.

1.

On

40010013501 board

Rev

A, that this trace is cut. This trace does

81

A,

B, or C Main Boards

on Rev D or higher boards.

Main Board Edge

B,

or C, make

not

need

to

sure

be

may

of"

cut

the

get a

EPS-16

1. OEX-6CAUTION!!!

PLUS KEYBOARD ONLY

Th1PORTANT!!!

The 8-pin connect outputs OEX-6. signals present connections connected.

mini-DIN

the

OEX-6

and

signal

The

EPS-16

to

The

connector

Output Expander

ground and, therefore, cannot be used to generate separate outputs without

PLUS

on

this

connector include digital control signals and +/-

these

signals could easily damage

OEX-6 should never

on, as this could damage the EPS-16

2.

Keyboards

The

O.S. disk

the value/position through unit to the latest software

that

think that they

and

EPROMs are the same for both the EPS-16 PLUS keyboard

Version

the

keyboard calibration routine and would act just like a rack.

1.00,

the

software determined whether the unit was a keyboard

of

the pitchwheel.

(EPROMs and disk).

on

the rear panel

to

the

of

the EPS-16

PLUS

should

only be

used

to

unit. This connector does not simply supply audio

the"

generates digital signals which must be convened externally. The

be

plugged

the

EPS-16 PLUS or

in

or

unplugged with

15VDC. any

the

Improper

external

EPS-16

device

PLUS

power

PLUS.

are

a Rack

and

rack.

With

If

the

pitchwheel

was

off center,

the

To

unit

fix

or a rack

would

this,

update

not

by

go

the

EPS-J6

PLUS

Service

Manual

page

23

Hardware Notes

EPS-16

1.

Dim

On This fIx this problem, remove the keypad/display board from the front panel. Place insulating tape

along

2. Panasonic m-257

On short between the noise during a floppy disk access. There are two ways

• Place insulatiDg tape

• Carefully remove (desolder) the surface-mounted resistor labeled

3.

Main On

mounting

4.

PLUS

Displays

early

can

the

early

PCB. PCB

Board

some

RACK or

Extra

EPS-16

cause extra segments

flat inside

EPS-16

With the bezel closest

next to the

early units,

PLUS

Disk

PLUS Racks that have a Panasonic JU-257 disk drive, there is a potential for a

disk drive mounting bracket and the case

PEM

(threaded mounting standoff)

PEM.H

Leave screws out when:

•

Expander

• no SCSI bom:l

these two mounting

it

is a

REV

A Memory

board,

ONLY

Segments (SIN 10000 to 10244)

Racks, there is a potential for the Display to

of

edge

of

the front panel (both top

Drive

on

the sides

PCB

mounting screw.

one

main

there is

no

M

Expander.", 0

Board 0 0 0

and

is

installed.

the display to light

of

the drive to isolate the

to

you

(pCB side up),

board screw was left screw

in

this location (see

SCSI board 5.

emory

3.

If

this Main Board hole doesn't line up with

its

cr-

o

mounting PEM, leave the screw out.

or

the whole display

and

bottom). Reinstall the KeypadlDisplay.

to

R130

out

due

When into

mark

-0

from

o 0 0

Main

Board

o 0

shon

of

the disk drive that

fix

this problem:

it

from the mounting bracket,

RI30

is located

to

the misplacement

Figure

11), don't insert one.

installing a REV A

a Rack,

in

the trace next to it.

this

be comer

out

to

the

may

appear

may

from

the

on

the

right

of

a Main Board

SCSI

sure that

the

is disconnected

Figure

Hardware for the Rack only

11

front panel.

disk drive

side

REV A

dim.

To

cause audio

or

of

the

board

-

Notes

4. ME-I6 PLUS Memory Expander Board

On

some

REV chassis further. Leave these

no

5.

SCSI On chassis

A

page

24

(see Figure 11). On

SCSI

board is installed

Board

some

REV A SCSI

(see

from.

thettace

A boards,

Figure

of

the mounting screws

power

two

screws

(no

boards, a mounting screw could connect a +5V trace

11).

Use

to

it.

up,

out

when a

screw head will touch the trace when a

a razor knife

the unit would

REV

A

memory

to

disconnect

could

show

the

connect a +5V trace

LOADING

expander board is used and when

bottom left corner

EPS-J6

SYS1EM

SCSI

PLUS Service Manual

to

board

to

the

of

the grounded but

get

no

is

installed).

grounded

the

"R"

in

REV

Software

Notes

Error

Occasional

concern.

a problem.

software, not The following

ID

16

20

Messages

It

~

error

messages are not unusual, and

is

important

These

as

hardware diagnostics.

error

to

realize

that

messages were designed to help our software engineers

messages could be caused by software: Description poly

or

mono pressure events sent to

unknown

button event 134

unless

these messages are diagnostics and

VC

48 parameter error

49

80

128

layer

bad

bus

error

buffer

error

to

MIDI

129 odd address error 192 130 131 132

Main

The following unexpected event messages could

32 33 34

divide illegal chk

by

zero

instruction 194

instruction register out

Board Problems

bad

download 40 bad ESP error

bad

ESP

chip

bad

ESP

RAM 145 unknown

of

bounds

be

they become chronic, they are not a

do

not necessarily indicate

in

the

development of the

ID

133 135

137 138

139

Description

#

trapv instruction overllow error

1111

violation

emulator

privilege

trace

line spurious interrupt unused vector load all data error (from

193

caused by a problem

138

keyup playback error out of

SOBs

on

error

the

Main

spurious interrupt

OUART

interrupt

cause

:MIDI

Board:

error

for

or card)

MIDI

The following unexpected event message could

'or Main Board Problems

be caused

by

a problem with the keyboard:

is

usually caused

by

too

much

incoming

144 out of buffers

SOFTWARE NOTES To

Check the Software Version from the front panel:

• Press Command,

• Repeatedly press the

Envl.

left

The display shows

NO

COMMANDS

or right arrow button until·the display

ON

PAGE.

shows

SOFfW

INFORMATION.

•

Press Enter-Yes. The display shows RAM VERSION = X.XX, press Enter-Yes, display VERSION

BOOTUP

The

foHowing

Enended

The following change

This

veaion ·ofROMsupports loading

The following

This

version

PLUS Racks have at least

shows

ROM VERSION =

= XXX (for the Rack, this

ROM CHANGES

change

was

included in

Ithe

acceptable

change

of

ROM

range

was

included

was

included

fixes a problem

this

of

Mod

in

version.

Y.YY,

will

ROM

Version

wheel

and

ROM

Version

the

operating system from

ROM

Version

when

the FLASH

l.00B (Keyboard only, SIN

other

analog

1.00c (Keyboard only,

l.00D

press Enter-Yes, the display

always read

inputs.

(Keyboard

memory

1).

10460):

SIN

11646):

FLASHBANK.

SIN

12440):

is completely filled

(0

shows

blocks

MIDI data. It also

ARE

the

KEYBOARD

free). All EPS-16

The following change

(Keyboard

A change

EPS-J6

SIN

12471. Rack SIN

was

made to allow the

PLUS Service Manual

was

included

10290)

CV

in

ROM

pedal

Version

value

on

l.OOE:

the

Analog

Test page go full range

(0-127).

page2S

Software Notes

The following (Keyboard SIN

A bug was fixed

change

13871,

that

was

included in ROM Version l.00F:

Rack

SIN

10738)

caused a DISK

TYPE

ERROR

when

saving instruments to FLASHBANK.

The following changes were included in O.S. DISK VERSION 1.10:

In version 1.10, In

addition. there

• When you go shuffle memory

to record. Previously there

• When the sequencer

the display shows

Record.

If

the sequencer

SHUFFLING

starti:ng

before

The following is a

HANGING

• It was possible

PITCH

• Pitch wheel reading

MIDI

•

If

TRANSMIT ON=INST

• Sustain pedals

the

into

DATA

the

NOTES

WHEEL

from

MULTI-TRACK

are

two

additional refmements added

RECORD

feature, which was omitted from version 1.00.

as

ofv

1.10

to

make the software a little more user-friendly:

has

Record after loading or deleting instruments (a condition that requires the EPS-16 PLUS to

for

a second or

is

synced to MIDI

WAITING

is

synced

for

sending

summary

to

make notes

drifted

MIDI

two)

the display will show SHUFFLING DATA, until the click starts and it is ready

was

no

visual

to

as

feedback during

(CLOCK.

...

to

indicate that the unit is waiting for a MIDI Start and clocks before going into

MIDI

and it needs to shuffle memory before going into record, it will show

long

as necessary, then

SOURCE=MIDI on the EDIT/Seq·Song page) and you press record,

this

time, causing

go

to WAITING... Always wait until the display shows waiting

device. of changes which were included in version 1.10:

hang

while playing

as

the

unit warmed up.

CHAN,

were

it didn't send proper values for key pressure out

not recorded properly

DIST

GUITAR sound (related

by

the sequencer.

users

to

wonder what was going

layer delay).

MIDI.

been implemented.

on;

LOADING

• When you loaded an Instrument into a copy

AND SAVING

of

an already loaded instrument, it sometimes crashed, displaying

ERROR 129.

• The EPS-16 PLUS did not handle errors properly existing one. Sometimes it created two

• When a bank should have been loading WRONG DISK INSERTED the wrong disk

• When an

SEQUENCER

• It was possible

• Click pan defaulted

label.

EPS

(classic) bank

to

edit track

to

when

was

parameters

+3; it should default

Disk

sounds

you

inserted the floppy, because it was really looking

loaded. the track

when no Instrument

when

saving multi-disk fIles, particularly when resaving an

1 's and a Disk 2 for a 3-disk sound.

from

hard

disk, the unit seemed to

PAN

values were ttanslated incorrectly

was

loaded.

to

0 (center).

ask

for a floppy. then displayed

at

the hard

in

the presets.

disk

but with

• On CHORUS + REVERB algorithm, click assigned to BUS3 still came out left channel when BUS3=OFF.

•

Click

assigned

• Overdub

EFFECTS

• Effects could howl when loading a

• On 44KHZ REVERB algorithm,

other.

the

SAMPLING

• Entering and exiting sampling while holding keys and sustain hang. or

Standby

be

ignored.

to

BUS3 periodically snuck into BUS1, creating a reverb splash, especially with

state

was

not

cleared

when

an

bank

Denme

1Dllooped

with a playback

Rate and

sequence stopped.

rate

different from the existing one.

Amt

parameters were interconnected, changing either one changed

.

pedal

could confuse the unit, causing sustain pedal to

or

worse.

44KHZ

effects.

page

26

EPS-J6 PLUS Service

Ma1UJ1l1

EPS-16

PLUS KEYBOARD

ONLY

EPS·16 PLUS KEYBOARD ONLY SECTION

Contents: page

12

16

Figure Replacing Modules

A - Main Board . . . . . . . 29

B -

Figure

13

C -

Figure

14

D - Power Supply Board . . . 31

E F - Pitch/Mod Wheel Assembly .

PLUS

Keypad/Display

EPS-16 Keyboard. Bottom

Transformer.

G - Line

H - DiskDrive . . . . . . . 33

Keyboard ExPloded View

Board.

PLUS

ojCase

Filter.

Button Colors

. . . .

.....

. . . . . . 32

. . . . . . . 33

28

. . 29

30 30

31

32

EPS-16

PLUS Service Manual fl,lge

27

f

-_-7---,SliderKnObS

t

I

1~==-_

\

I

I I

--..~

----

--

------

~--~

~

..

-~

~

I

i

--=-~

page 28

Power Supply

Board

Figure

EPS-16 PLUS Keyboard Exploded View

12

-

EPS-J6

PLUS

Service Manual

)

Replacing

EPS-16

PLUS

Replacing the Main Board

Modules (KEYBOARD ONLY)

Removing

Installing

SECTION

1. Remove all cables connected to the

2. Remove the four wrench and raise the control panel.

(4) screws that fasten the control panel with a

3. Remove the Keyboard (see Section

ribbon cable from the Main Board (at J12) instead

EPS-16

PLUS, including the

NOTE: These

C).

Note that you should

of

are

machine screws.

from the Keyboard.

4. Disconnect all cables from the Main Board:

a. Push-on ground wire (located between the b.

J4-DISK, 34-pin ribbon cable . HI-POWER,

c. d.

J13-WHEELS, e. J15-DISPLA f. J2-NON-VOLATTI...E :MEMORY and/or J3-AUXEXPANSION

5. Remove the six (6)

PedaleCV, Left/Mono, Right/Mono, Audio In and Phones.

6.

Remove the eight (8) self-tapping screws and

star washer that attach the Main Board to the case and remove the

7. With the board tilted

panel. Press the board down and into place.

8. Replace the Main

9.

Reconnect the cables. Reinstall the Keyboard (see Section C).

10. Power up, test the unit, and close the control panel.

9-wire cable

Y,

15mm

Board

nuts from the rear panel jacks marked

on

a slight angle, insert the jacks into the holes in

screws and secure the jacks with the nuts.

:MIDI

one

Thru and

ground machine screw with

Power

2.5mm

remove

MIDI

Ft.

board

cord.

hex

the 20-pin

Out jacks)

(if

present)

Sw.,

the

rear

B Replacing the Keypad/Display Board

Removing 1. Remove all cables connected

2.

Remove the Volume and the

IMPORT

Installing

fasten the control These are machine .screws.

3. Remove the six-wire cable from the left side and seven-wire cable from

side

of

the Keypad/Display board. Note that these cables

ANT!

The

individual colored buttons board underlay. Make sure the control panel is open buttons from falling

Figure 13 for button color placement.

4..

Remove the fomteen (14) screws that hold the KeypadlDisplay in carefully remove the Keypad/Display. Remove the cardboard insulator that covers the bottom

5.

To

reassemble, first

and that the lens

6. Install the new KeypadlDisplay board with the cardboard insulator using

fourteen (14) screws. Reconnect the two cables paying particular attention to polarity. Reinstall the knobs

7.

Power

up, test the unit, and close the control panel.

panel

is

with a 2.5mm hex wrench and raise the

out

when the board is

of

the Keypad/Display board.

make

sure that the underlay and all the buttons are in place

clean and in its proper position.

to

the

EPS-16

Data

Entry knobs. Remove the four

are

held in place only by the Keypad/Display

on

the Data Entry and Volume sliders.

PLUS, Including the

are

all the way

removed

If

they do

keyed.

Power

(4)

screws

panel

to

prevent the

fall

out, see

place

cord.

that

NOTE:

the

right

and

the

EPS-16

PLUS Service Manual

page

29

Replacing EPS-J6 PLUS Modules (KEYBOARD ONLY)

Volume =

Removing

Installing

IBlack I

1

A

~

-

v

-

No

Cancel

-

Entry======

Y/iIS

EnIer

-

Etn.ment

Load

-

Command

-

Edit

-

Mode==Page

ling

..

IBlack I

1 2 3

....

4

•••

7 8

MIDI

.....

III

. Figure

13

-EPS-16

5

6

II

0

Data

PLUS Button Colors

Replacing the Keyboard

1.

Remove

2.

Remove the four (4) screws that secure wrench.

3. Place the unit upside down on a soft surface

attach the Keyboard to the·case.

4. Carefully turn the unit right side up. Raise the control panel

Keyboard Ribbon cable the polarity.

5.

Remove the Keyboard from the case by gently lifting up the front pulling the control panel mounting tabs, the Keyboard Keyboard cavity (see

6.

While paying particular attention to polarity, remove the Keyboard

from the

7.

Connect the Keyboard Ribbon cable to the lies flat beneath the Keyboard and is not

all cables connected

NOTE: These are machine screws.

it

toward the front

pp.

old

Keyboard and install

to

the

EPS-16

the

See

Figure

(12)

from the Main Board, paying particular attention

of

the unit Once

1-2.). .

it

on the

pinched

PLUS,

control panel

and

remove the ten (10) screws that

14

for location

the

rear

can be

new

Keyboard.

Main

Board.

under

~

=;;;E~~ue~ncer=

including the

with a 2.5mm

of

screws.

and

disconnect the

of

the

Keyboard

removed

Be

the

from

sure

Keyboard

IBlack I

I

Dark

Power

of

it

while

has cleared

the

Ribbon

that

the

frame.

Continue

Grey]

cord.

hex

to

cable

IMPORT

page

30

ANT!

ANT! Make sure the

If

the ribbon cable is mispinned, fuses

8.

Insert the new Keyboard rear first into the unit

cavity. Gently slide the Keyboard toward the of

the Keyboard

standoffs.

9.

Turn the unit upside down

10.

secure

Power

the

Keyboard

up,

test the unit, and close the control panel.

F3

and

F4

on the

at

the front

rear

of

the unit, lowering the front

as

needed to clear the control panel mounting tabs.

Disk

Drive ribbon cable is

on

a soft surface

to

the case.

not

caught under

and

replace the

EPS-J6

power

supply

of

the

Keyboard

the

Keyboard

ten

(10) screws that

PLUS Service Manual

will blow.

Replacing

EPS-J6

PLUS Modules (KEYBOARD ONLY)

0)

0 0 0

•

Wheel Assembl Screws

~D

•

I

• Front

•

o 0 o 0

1111111 U 11111

of

Case (Keyboard Side) •

0 0

•

Figure 14 -Bottom

•

Keyboard Screws

•

of

•

Case

SECTION

D Replacing the Power Supply Board

Removing

1.

Remove all cables connected to the EPS-16 PLUS, including the Power cord.

2. Remove wrench. NOTE: These are machine screws.

3. Disconnect the 9-pin connectors (II, J4), the 6-pin connector (13), and

connector (J2) from the keyed.

the

four (4) screws that fasten the control panel with a 2.5mm

Power Supply Board. Note that these connectors are

0

•

o

~(g

•

(c)

I

hex

the

4-pin

IMPORT

Installing

ANT! The connector on the 9-pin cable from the transformer has a high retention force.

Please use a scribe, screwdriver, pull on the wires!

4. Remove the screw and star washer that connect the ground wire

5.

Remove the two (2) screws and nuts that secure the Power Supply to (note that there are star washers on each screw).

6 .. Remove the Power Supply board by pulling the front

Keyboard and then lifting it up

7. Insert the replacement Power Supply Board into the case finned

Lift

the

tinned

opening. The standoffs are intended only for support

down to the case.

8. Reinstall the

ground wire to the heat sink. Carefully reconnect the four cables, paying particular attention to the alignment Power up, test the unit, and close the control panel.

9.·

heat sink from

Power Supply screws and star washers and

or

similar tool to remove it

so

that the finned heat

the

outside

of

the case so that it

of

pins and connectors.

of

sink

and

the

clears

should

be

sure

(see

p.

4).

Do

to

the heatsink.

the

board toward

the

case.

heat

sink first.

is

centered in the

not

be

to

connect the

not

case

the

stuck

EPS-J6

PLUS Service Manual

page3J

Replacing EPS-16 PLUS Modules (KEYBOARD ONLY)

Replacing the Transformer

SECTION

F

Removing

Installing

Due to problems Transformer replaced should you

are located outside the U.S.

that

may occur with

be

sent

the

plastic case, all units that need the

back

to

the

factory. Contact your distributor

Replacing the Pitch/Mod Wheel Assembly

The

Pitch and

cables.

1. Remove

2.

Remove the wrench.

3 . Place the unit upside down on a soft surface and remove the

attach the Wheel Assembly to the case.

4.

Return the unit ties that hold

5. Disconnect the main harness from

Keypad/Display and the line filter. have connector locks.

6. Carefully

7.

Disconnect the cables polarity.

8. Remove the Disk Drive and place H Reattach

9.

Connect the

a. the Main Board b. the Power c. the KeypadlDisplay (left sides), and d. the line filter ground lug paying particular attention

10. Reconnect the

11. Reattach the Wheel Assembly

12. Power up, test

Mod

Wheels are replaced

all cables connected to

four

(4) screws that

NOTE: These

to

an upright position. Raise the control panel and cut the wire

the

wire harness to

lift

the

Wheel Assembly out

the

Disk Drive cables.

new

wire harness to:

Supply (J1,J2, J3,

wire harness

the

unit, and close

are

machine screws.

from

the Disk Drive, paying particular attention

(Ill,

J13, J15, and ground lug),

to the alignment

to

the

to

as

an

assembly along with

the

EPS-16 PLUS, including

fasten

the

control panel with a 2.5mm hex

See Figure

the

chassis. .

the

Main Board, the Power Supply, the

Note

that these connectors

of

the case.

it

into

the

new

and

ground wire to the heat sink),

of

case

using wire ties.

the

case using the four screws.

the

control panel.

14

for location

assembly as described in Section

pins and connectors.

the

main harness

the

Power cord.

four·

(4) screws that

of

screws.

are

keyed

to

if

and

the

page 32

EPS-16 PLUS Service Manual

Replacing EPS-J6 PLUS Modules (KEYBOARD ONLY)

SECTION

G Replacing the Line Filter

Removing

Installing

IMPO

RT

ANT! Failure

SECTION

H

Removing

Installing

1.

Remove all cables connected

the

four

2. Remove

wrench. NOTE: These

3.

Remove attention

4.

Remove there

5. Install

washers

6. Reconnect the

hazard (see Figure 3).

7.

Power

the

to

the

are

star washers

the

and

to

connect the

up,

test

(4)

three (3)

the polarity.

two (2) screws and

new Line Filter from outside

nuts.

three

wires

the

unit,

screws

wires

on

wires

to

the

EPS-16 PLUS, including

that

fasten

are

machine screws.

connected

nuts

the

inside only.

to

the Filter,

to their proper posts can lead

and

close

the

to

the

that secure

the

again

the

control panel.

control panel with a 2.5mm

back

case using

Replacing the Disk Drive

1.

Remove all cables connected to

2. Remove

wrench. NOTE: These

3. Turn the unit over,

Wheel assembly to the unit

assembly out

4.

Disconnect the polarity (see p.

5.

Remove wheel assembly.

6. Carefully slide

!mIDPJ.iiately

7.

m.

8. Slide the new Disk Drive into place and mount washers. Reconnect the of

pins and connectors.

9. Reattach

10. Power up, test

the

four

(4)

screws

top

to

an

upright position and raise

of

the case.

two

cables from

2,

the Disk Drive).

the

four (4) screws and star washers that attach

the

Disk Drive

place

the

defective

the

wheel assembly

the

unit,

are

down,

case.

two

and

the

EPS-16 PLUS, including

that fasten

machine

and remove the four

See Figure

the

out

drive

cables, paying particular

to

the

close

the

control panel

.screws.

14

for location of screws. Return the

the

control panel.

Disk Drive, paying particular attention

of the wheel assembly.

in

the

anti-static

case using

the

control panel.

the

Power cord.

of

the

Filter, paying particular

the

Filter

to

the case.

the

two

screws,

noting the proper polarity.

to

a potential

the

Power

with

a 2.5mm

(4)

it

the

using

four

screws

Carefully

bag

the

attention

screws.

the

Disk

that

four

that attach

lift the

Drive

the

new

screws

to

the

alignment

hex

Note

star

shock

cord.

hex

.

the

wheel

to

the

drive

and

that

to

the

came

star

EPS-J6

PLUS Service Manual

page

33

Replacing EPS-J6 PLUS Modules (KEYBOARD ONLY)

NOTES:

page 34

EPS-16

PLUS Service Manual

EPS-16

PLUS

RACK

ONLY

EPS·16 PLUS RACK ONLY SECTION

Contents:

Figure Replacing Modules

14

PLUS

A - Rack Main Board . . .

B -

C -

D -

E - Rack Transformer

F -

Rack Rack Rack

Rack

G - Rack

H - Rack Disk Drive . . . . .

J - Rack Memory Expander

Rack

Exploded View

Keypad/Display Board

KPC Simulator Board .

Power Supply Board

OEX-6 Board . . . .

Line

Filter . . . . .

....

..

Board

page

36

37

38

39 39

40 40

41

42

EPS-16

PLUS

Service Manual

page

35

Simulator Board

Memory

-...

Expander Board

page 36

--c~_

~--

Power Supply

Disk

Drive Mounting Bracket

Figure 16 -

EPS-16

PLUS

Rack

Exploded View

EPS-16 PLUS Service Manual

Be

SECTION

Replacing

EPS-J6

PLUS Modules (RACK ONLY)

A

Removing

Installing

Removing

Replacing the Rack Main Board

1. Remove all cables connected to

cord.

2. Remove the lid (see below). Remove the OEX-6 board (see Section F steps 3-6).

3. Remove the five (5) 15mm nuts from the rear panel jacks marked Audio In,

Right/Mono, Left/Mono,

Pedal-CV, and Ft. Sw.

4. Disconnect all cables from the

5.

Remove the ten (10) machine from the Main Board (one screw

VR6 and C68). See Rack Hardware Notes items #3 and 4 on

6.

Before installing the new circuit board, make sure the mylar insulator

7. With the board tilted on a slight angle, insert the jacks into panel. Press the

8. Replace the Main Board screws, and secure the jacks with the

,cables.

9. Reinstall the OEX-6 board (see Section F) and secure

10. Power up, test the unit, and reattach the lid (see below).

board down and into place.

REMOVING THE LID

Remove the twenty-two (22) screws that fasten the cover:

1. Remove the one (1) 6-32 machine screw from above the disk drive (about an inch back from the front panel) that attaches

2. Remove the four (4) #8-32 machine screws and star washers from panels

3.

Remove the four (4) panel.

4.

Remove the nine (9) #5 x 1/4" self-tapping screws that attach the a. remove two

b. remove five

5.

Carefully remove the

of

the unit (the ones that could attach the mounting

416

x 1/4" self-tapping screws that attach the

(2)

screws from

(5)

from the back

star washer.

lid

from the

the

EPS-16 PLUS Rack, including the power

Main

Board.

screws

(and one star washer

is

located in the middle

.the

cover

each

side

of

the unit, and

of

the

unit

Note that

from

the ground pad)

of

the board between

p.

24.

the

holes in the rear

the

nuts. Reconnect

the

jacks

with

to

the

disk drive bracket,

ears).

lid lid

the

center screw has a

unit.

is

in place.

the nuts.

each side

to

the

front

to the base:

REATTACHING THE LID

IMPORTANT! Be :sure to install all screws into the Control Panel with a hand

:screw driver to avoid stripping the holes (see

Installing 1. Install the five

there is a star washer on the center screw.

2.

Install the two

3.

Install the one the control panel.

4.

Install the four (4) self-tapping screws on the top

panel.

5.

Install the four (4) machine screws and star washers into each side ones that could attach the mounting ears).

EPS-J6

PWS

Service Manual

(5)

self-tapping screws on the back

(2)

self tapping screws on either side

(1)

machine screw on the top

of

the unit located about 1" back from

p.

4).

of

the unit Make

of

the

unit

of

the unit closest

sure

that

to

the control

of

the unit (the

page

37

Replacing EPS-J6 PLUS Modules (RACK ONLY)

SECTION

B

Removing

Installing

1.

2.

3.

4.

5.

6.

7.

8.

9.

Replacing the Rack Keypad/Display Board

Remove all cables connected to the

cord. Remove the lid (see Section Remove the two cables from

two

wires

to

board, main board.

Carefully tip the and ,one star washer from Remove the one (1) machine screw from the

back

from

the bracket inside the unit). Carefully remove the Control Panel from pin

ribbon

Place

screws that attach the KeypadlDisplay

See

Hardware control Reconnect the new assembly into place (make sure the striped

1).

cable

the

Control Panel face

panel

the

unit

onto its rearpanel.

control panel (this screw goes through the

from

the

Notes p. 24. Install the

using the

20-pin ribbon

eleven

IMPORTANT! Reconnect the 20-pin

before sliding

the

new assembly into place. Be screws into the Control Panel with a stripping the holes (see p. 4).

A).

power

the

KPC

down

cable

ribbon

EPS-16

the

disk drive, three

switch,

bottom

simulator board.

screws.

and

of

on a

Board new

to the

Remove

the

soft

KPC

cable to

PLUS

unplug

unit

bottom

unit

surface.

KeypadlDisplay

theKPC hand

Rack,

cables

the

closest

Just

to

the control panel.

simulator board

side

from

the

headphones

four (4)

to

of

the unit

disk

enough to

Remove

of

the ribbon

simulator board

screwdriver

including

the

control

board

sure

the

the keypad/display

cable

self-tapping

panel.

located

drive

mounting

unplug

the

eleven

onto

before

sliding

cable

to

install all

to

avoid

power

from

screws

about

the

20-

(11)

the

new

is on

the

I"

the

10.

Install the four (4) self-tapping screws (one the

unit

closest to the control panel.

11.

Install the one (1) machine back

from

the control panel (this screw goes through the

bracket inside the unit).

12.

Connect the two cables

wires to the main board paying particular attention

13.

Power

power

up, test the unit,

switch

screw

to

the

(see

and

reattach the

from the

disk

drive, three

Figure 2),

bottom

and

to

polarity.

lid

(see

with a star

of

the

cables

plug

the

Section

washer)

unit

disk

to

the

headphones

A).

on

located

drive

keypad/display,

the

bottom

about 1"

mounting

cable

into

of

two

the

page 38

EPS-J6

PLUS Service Manual

SECTION

Replacing EPS-J6 PLUS Modules (RACK ONLY)

C

Removing

Installing

SECTION

D

Removing

Replacing the Rack KPC Simulator Board

l.

Remove all cables connected

cord.

2.

Remove the lid (see

3.

Remove the control panel (see

E).

4.

Disconnect the 20-pin ribbon cable from the KPC simulator board.

5.

Pop. the

standoffs.

6.

Install the the board with the 2O-pin connector is closest to the base

7.

Connect the 20-pin ribbon cable making sure that the striped side is

8.

Reinstall the control panel (see Section B)

9.

Power up, test the

KPC

simulator board from the four white standoffs

new

Section A).

KPC simulator board onto the standoffs making

unit, and reattach the lid (see Section A).

to

the

EPS-16

Section B)

PLUS Rack, including the power

OR

remove the transfonner (see Section

of

OR

the transfonner (see Section E).

Replacing the Rack Power Supply

1. Remove all cables connected

cord.

2.

Remove the lid (see Section A).

3.

Disconnect the 9-pin cables

.

from

the

Power

Supply Board. Note that these cables are keyed.

to

the

EPS-16

(Jl,

J4), the 6-pin cable (13), and the

PLUS Rack, including the power

by

squeezing the

sure

the side

the unit.

on

Board

4-pin

of

1.

cable (J2)

IMPORT

Installing

ANT!

The connector on the 9-pin cable from Please pull

4.

Carefully tip the unit onto its board with one hand., remove the three screws from the bottom that attach it to base.

S. Remove the

6.

Insert the replacement Power Supply Board.

7.

Reinstall the particular attention

8.

Power

use

a scribe, screwdriver,

on

the wires!

Power

up, test the unit, and reattach the

Supply board.

Supply screws. Carefully reconnect the four

to

the alignment

or

rear

paneL While holding onto the

the

transfonner

similar tool to remove it (see

of

pins and connectors.

lid

(see Section A).

has

a high retention force.

p.

4). Do not

Power

cables,

Supply

the

paying

EPS-16

PLUS Service Manual

page

39

Replacing EPS-16 PLUS Modules (RACK ONLY)

SECTION

E

Removing

Installing

Replacing the Rack Transformer

Remove all cables connected

1.

cord. .

2.

Remove the lid (see Section A). Disconnect the transformer cables to the

3.

switch.

4.

Remove

5.

Insert the

washers.

6.

Reattach

7.

Power up,

the

four screws and flat washers that hold the

new

Transformer and attach

the

cables to the power supply,

test

the unit, and reattach the

to

the

EPS-16

power

it

to

line

lid

PLUS Rack,

supply, line filter,

the base using

filter, and

(see Section A).

SECTION

F Replacing the Rack OEX-6 Board

Removing

Installing

1. Remove all cables connected

cord.

2.

Remove

3.

Disconnect the ribbon cable from the

4.

Remove

the

lid (see Section A).

the

six (6)

15mmnutsfrom

to

the

EPS-16

OEX-6

the

rear

PLUS Rack,

board.

panel jacks

Bus3ILejt, Bus2lRight, Bus21Left, AuxllRight, andAuxllLeft.

5.

Pop the

6.

Remove

7.

With the

in the

8.

Reconnect

is

9.

Secure

10. Power up,

on

OEX-6

the

rear

the

board from the two white standoffs

OEX-6 board from the unit.

new

OEX

-6 board tilted

panel

and

snap the board onto

the

ribbon cable from the main

on

a slight angle, insert

the

standoffs.

board

1.

jacks

with

the

nuts.

test

the unit, and reattach the lid (see Section A).

making sure that

including

Transfonner

the

power

including

marked

by

squeezing

the

jacks

the

and

in

four

screws

switch.

the

Bus3lRight,

the

into

the

power

place.

and

flat

power

standoffs.

the holes

striped side

page

40

EPS-J6 PLUS Service Manual

Replacing

EPS-16

SECTION

G Replacing the Rack Line Filter

PLUS Modules (RACK ONLY)

Removing 1. Remove all cables connected to the

cord.

2. Remove the

3. Remove the three (3) wires connected. to the back

attention to the polarity.

4. Remove the two (2) screws and nuts that

there are star washers

Installing

5. Install the new Line Filter from the inside

washers and nuts.

6. Reconnect the

IMPORTANT! Failure to connect the wires

hazard (see Figure 3).

7. Power up, test the unit, and reattach the lid (see Section A) .

lid

(see Section A).

on

three

wires to the Filter, again noting the proper polarity.

both sides.

to

their proper posts

. SECTION

H

Removing

lDstalling

1.

2.

3.

4.

5.

6.

7.

Replacing the Rack Disk Drive

Remove all cables connected cord. Remove the lid

Disconnect the two cables from the Disk Drive, paying particular attention to

polarity (see p. 2, the Remove the four control panel.

Remove the four

Immediately place the defective drive into the anti-static bag that

came in. .

Attach the mounting brackets to the new Disk

(see Section

Disk

(4) screws that attach the Disk Drive mounting brackets to the (4) screws that attach the mounting brackets to

to

the

A).

Remove the control panel (see

Drive).

EPS-16

secure

of

EPS-16

PLUS Rack, including the power

of

the Filter,

the Filter to the case. Note

the

base

using the screws, star

can

lead to a potential shock

PLUS

Rack, including

Drive

using the four screws.

paying

the

Section

the

Disk

the

new

particular

that

power

B).

the

Drive.

drive

IMPORTANT!

8.

9.

10. Connect the two cables, paying particular attention

11. Power up, test the

EPS-16

PLUS Senlice Manual

Be

sure to install all screws into the Control Panel with a hand

screw driver to avoid stripping. the holes (see

Attach the mounting brackets to the control panel trying to use the Attach the control panel to the base (see Section B).

connectors.

unit, and reattach the lid (see Section A).

p.

4).

to

the alignment

same

of

holes.

pins

and

page

41

Replacing

EPS-J6 PLUS Modules (RACK ONLY)

SECTION

J Replacing the Rack Memory Expander Board

Removing·· 1. Remove all cables connected to the

cord.

2. Remove the lid (see

3. With the front panel close to you, the memory expander board is located corner

4. Remove the screws that attach the memory expander to the base. expander board is a memory expander is a place.

5.

Wiggle the memory expander board side to side and up a bit to remove it.

Installing 6. Before installing the replacement board, make sure that the connector fingers are

clean.

7.

Insert the board fingers into the main board connector.

8. Attach the board See

9.

Power up, test the unit, and reattach the lid (see Section A).

of

the unit.

See

Rack

If

needed, clean them using a pencil eraser. .

Rack

Hardware

Section A). Remove the control panel (see Section B).

REV A, there should only be two screws holding

REV B

Hardware

to

the chassis using the correct number

Notes

EPS-16

or

higher, there should be four screws holding it in

Notes

item

PLUS Rack, including the power

item

#4

on

p.

24.

and

placement

#4

on

p. 24.

in the left

If

the memory

it

in.

of

screws.

If

the

page 42

EPS-J6

PLUS

Service Manual

Ensoniq Corporation EPS-16 Plus Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual