ENSONIQ Mirage - Section I: Replacing The Main Circuit Board; Section J: Replacing The Wiring Harness

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SECTION

|

Replacing

The

Main

Circuit

Board

When

replacing

the

main

circuit

board

of

the

Mirage,

keep

in

mind

that

it

is

the

most

expensive

module

in

the

unit

and

is

quite

fragile

and

static

sensitive.

The

circuit

board

is

held

in

place

by

the

audio

in

and

out,

footswitch

and

sync

jacks

in

the

rear

panel

and

by

three

snap-in

standoffs

in

the

front

of

the

board.

1.

Follow

the

instructions

for

the

removal

of

the

keyboard

(SECTION

G

-

1...4),

with

one

exception.

Instead

of

removing

the

keyboard

cable

from

the

keyboard,

disconnect

the

J-3

connector

from

the

main

circuit

board.

2.

With

the

keyboard

removed,

disconnect

the

disk

drive

cable,

keypad

cable

and

two

harness

connectors

from

the

main

circuit

board.

3.

Unfasten

the

four

nuts

from

the

audio

in

and

out,

footswitch

and

sync

jacks.

IMPORTANT!

4.

Pop

the

circuit

board

off

the

three

standoffs

on

the

front

of

the

board.

Lift

the

front

of

the

board

and

remove

it

from

the

unit.

Note

that

there

are

lockwashers

between

the

jacks

and

the

rear

panel

and

that

the

two

standoffs

on

either

side

of

the

expansion

port

connector

are

not

secured

to

the

case.

Remove

these

standoffs

from

the

board

and

save

them

to

install

the

new

board

but

DO

NOT

remove

the

release

film

from

the

adhesive

pad.

5.

Before

installing

the

new

circuit

board

make

sure

that

the

board

insulator

is

in

place

on

the

bottom

of

the

case,

insert

the

non-adhesive

standoffs

on

either

side

of

the

expansion

port

connector

and

place

the

lockwashers

on

the

jacks.

6.

With

the

circuit

board

tilted

slightly

to

the

rear,

insert

the

jacks

into

the

holes

in

the

rear

panel

and

snap

the

board

onto

the

three

front

standoffs.

Secure

the

jacks

with

nuts.

7.

Carefully

reconnect

the

disk

drive,

keypad

and

harness

cables.

8.

Install

the

keyboard

according

to

the

instructions

in

SECTION

G

-

5...

9,

with

this

exception.

Since

the

cable

should

already

be

attached

to

the

keyboard,

make

sure

that

it

is

not

pinched

by

the

mounting

rails

and

connect

it

to

location

J-3

on

the

main

circuit

board.

Take

care

that

the

two

unused

terminals

of

the

cable

connector

face

the

rear

of

the

unit.

9.

Close

the

control

panel

and

test

the

unit.

SECTION

Replacing

The

Wiring

Harness

1.

Remove

all

cables

connected

to

the

Mirage,

WHEEL

MODULE

(BOTTOM

VIEW)

FRONT

including

the

power

cable.

2.

Remove

the

five

screws

which

fasten

the

Mirage

control

panel

and

raise

the

panel.

3.

The

wiring

harness

is

hard

wired

into

the

wheel

module.

Unplug

the

harness

from

all

four

connections

and

cut

the

two

wire

ties

to

release

the

harness.

4.

Tilt

the

Mirage

up

on

its

back

to

expose

the

four

wheel

module

screws

on

the

bottom.

Remove

the

screws

while

supporting

the

wheel

module

with

your

free

hand.

5.

Unsolder

the

connections

at

the

wheel

module

and

note

the

location.

6.

Solder

the

new

harness

to

the

wheel

module.

Refer

to

Figure

6

for

the

proper

configuration.

Reconnect

the

harness

and

install

new

wire

ties.

7.

Follow

the

instructions

for

the

installation

of

the

wheel

module

(SECTION

E

-

4).

8.

Close

the

control

panel

and

test

the

unit.

FIGURE

6

-

WHEEL

MODULE

CONNECTIONS

HARNESS

aemnsonio

263

Great

Valley

Parkway

*

Malvern,

Pennsylvania

19355

Parts

Ordering

1-800-441-1003

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