Crown PSA-2 User manual

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crown

SERVICE

MANUAL

PSA-2/SA2

PSA-2D

/PSA-2DX/PSA-2X

SELF-ANALYZING

AMPLIFIER)

=

xcsoo2

“1

The

information

furnished

in

this

manual

does

not

include

all

of

the

details

of

design,

production,

or

variations

of

the

equipment.

It

does

not

cover

all

the

possible

contingencies

which

may

arise

during

operation,

installation,

or

maintenance.

Should

special

problems

arise,

or

further

information

be

desired,

please

contact

the

Crown

International

Customer

Services

Department.

Crown

International

1718

W.

Mishawaka

Rd.

Elkhart,

Indiana

46514

Ph:

(219)

294-5571

WARNING

TO

PREVENT

SHOCK

OR

FIRE

HAZARD

DO

NOT

EXPOSE

TO

RAIN

OR

MOISTURE!

CROWN

INTERNATIONAL,

INC.

1718

W.

MISHAWAKA

RD.

ELKHART,

INDIANA

46514

RVW

Sec.

™

Section

6

Section

7

Section

8

™

Review

re

Introduction

.

Il.

Warranty

...

Ill.

PSA-2

Specifications

.

XI

Illustrated

Parts

List

crown

TABLE

OF

CONTENTS

PSA-2

Stereo

Specifications

PSA-2

Monaural

Specifications

.

PSA-2

Balanced

Input

Module

Specifications

SA2

Specifications

.....

SA2

Stereo

Specification:

SA2

Monaural

Specifications

.

Panel

Configuration

(PSA-2)

.

Panel

Configuration

(SA2)

.

PSA-2

Available

Formats

Performance

Graphs

...

Gr

GETeray

formations

s..

22

22

aa

sre

csisate

Pleas

elas

ate

OCIS

Fink

99

sales

Soletgiel

es

discaretertw

ols

6.2

Standard

and

Special

Parts

..

6.3

Ordering

Parts

.

6.4

Shipment

......

Qs

RMN

IUSs

gere's'n

cigie

stile

sats

Latte

cue

edie

sels

6.6

Schematics/Bd.

Layouts/

Parts

Lists/

Exploded

View

Drawings

...

Maintenance

7.1

Introduction

7.2.

Required

Test

Equipment

7.3.

Soldering

Techniques

7.4

Basic

Troubleshooting

7.5

Discharging

Instructions

.

7.6

Disassembly

for

Inspection,

Service,

Testing,

Adjustment

and

Repairs

.

7.7

Reassembly

7.8

Repair

Instructions.

7.9

Electrical

Checkout,

Troubleshooting

and

Adjustment

.

7.10

PSA-2

HI/LO

Pass

Filter

Frequency

Alterations.

7.11

Voltage

Conversion

Instructions

.

7.12

Block

Diagram

Circuit

Theory

7.13

Theory

of

Operation

Service

Bulletins

..

crown

LIST

OF

ILLUSTRATIONS

PSA-2:Front

Panel

.5--ciaes.csess

de

sao

HME

aes

CONT

Re

Ml

iss

Sara

+

os

oles

SHES

PSA-2

Back

Panel

..

SA2

Front Panel

.

SA2

Back

Panel

..

PSA-2

Available

Formats.

Typical

IM

Distortion.

.

Typical

Output

Impedance

.

.

Typical

Frequency

Response

.

Output

Phase

Response

Typical

Damping

Factor

(8

ohms)

.

Typical

Crosstalk

........

Typical

Noise

Spectrum.

oi

Typical

CMR

Through

Balanced

Input

Module

Typical

Power

Output

Low

Frequency

Protect

Action

Typical

Frequency

Response

-

Balanced

Input

Module

.

Typical

AGC

Action

Relay/

Power

Supply

Module

Schematic

. .

Relay

Module

Component

Board

Layout

Low

Voltage

Power

Supply

Component

Board

Layout

.

Anti-pop

Module

Schematic

........

Anti-pop

Module

Foil

Board

Layout

.

Anti-pop

Module

Component

Board

Layout

.

Main

Module

#1/Output

Terminal/

PNP-NPN

§

Main

Module

#2/Output

Terminal/

PNP-NPN

Schematics

Main

Module

#1

Component

Board

Layout

Main

Module

#2

Component

Board

Layout

PNP

Output

Module

Component

Board

Layout

.

NPN

Output

Module

Component

Board

Layout...

Output

Terminal

Module

Component

Board

Layout

.

Mother

Board

Module

Component

Board

Layout

.

PSA-2

Input

Connector

Module

Schematic

..

PSA-2

Input

Connector

Module

Component

Board

Layout

SA2

Input

Connector

Module

Schematic

SA2

Input

Connector

Module

Component

Board

Layout

..

PSA-2

Display

Module

Schematic

........

PSA-2

Display

Module

Foil

Board

Layout.

PSA-2

Display

Module

Component

Board

Layout

.

SA2

Display

Module

Schematic

........

SA2

Display

Module

Foil

Board

Layout.

SA2

Display

Module

Component

Board

Layout

.

PSA-2

B.I.M./

Filter

Board

Schematic

Balanced

Input

Module

Foil

Board

Layout

Balanced

Input

Module

Component

Board

Layout.

Filter

Board

Component

Layout

Front Panel

Assembly.

.

SA2

Front

Panel

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Fig.

Main

Chassis

Assembly

.

.

Transformer

Assembly

...

Power

Capacitor

Assembly

.

NPN/PNP

Output

Assembly

.

Back

Panel

Assembly

Final

Assembly

PSA-2

Balanced

Input

Module

Assembly

.

Miniature

Soldering

Iron

.........

Correct

and

Incorrect

Solder

Applica

Unsoldered

Wire

...

External

Strands

...

Cut

Strands....

Wire

Strippers

.

Disturbed

Joints

.

.

Cold

Solder

Joint.

Rosin

Joint

....

:

Component

Lead

Spacing

.

Component

Lead

Bending

.

Correct

Pressure

Applied

..

Acceptable

Solder

Joints

.

Soldering

to

a

Lug

Turret

Terminal

..

Wire

Braid

Desoldering

..

Discharge

Points

......

Component

Location

Diagram

.

Internal

Hard

Wiring

Diagram

.

Consumable

Materials

Chart

...

Correct

Output

Waveform

............-

Correct

Square

Wave

Output

Waveform.

Mono

Output

Waveform

IM

Distortion

Test

Set-up

...

Signal

to

Noise

Test

Set-up

Test-tone

Output

Waveform

.

Filter

Board

Schematic

......

Filter

Board

Component

Layout.

Voltage

Conversion

.......

World-wide

Voltage

Map

PSA-2/SA2

Block

Diagram

Common

Output

Configuration

...

PSA-2/SA2

Output

Configuration

.

crown

REVIEW

SECTION

I.

Introduction

This

manual

contains

complete

service

information

on

the

Crown

PSA-2/SA2/PSA-2D/PSA-2DX/

PSA-2X

amplifiers.

It

is

designed

to

be

used

in

conjunction

with

the

PSA-2/SA2

Instruction

Manual.

However,

some

important

information

is

duplicated

in

this

Service

Manual

in

case

the

Instruction

Manuals

are

not

readily

available.

NOT

THE

INFORMATION

IN

THIS

MANUAL

IS

INTENDED

FOR

USE

BY

AN

EXPERIENCED

TECHNICIAN

ONLY!

II.

As

a

Crown

Warranty

Service

Station,

you

should

be

familiar

with

Crown

warranty

policies.

Each

Instruction

Manual

contains

basic

policies

as

related

to

the

customer.

However,

under

questionable

circumstances,

please

contact

the

Technical

Service

Department

or

Director

of

Customer

Service

at:

Crown

International,

Inc.,

1718

W.

Mishawaka

Road,

Elkhart,

IN

46514.

Warranty

Hl.

General

Protection:

Protection

circuitry

limits

the

output

level

to

protect

the

output

transistor

stage,

even

in

the

case

of

elevated

temperature.

Transformer

overheating

results

in

shutdown

(STANDBY)

of

that

particular

channel.

Controlled

slewing

rate

voltage

amplifiers

protect

the

unit

against

RF

burnouts.

Input

overload

protection

is

furnished

by

a

resistor

at

the

input

of

the

amplifier

to

limit

current.

PSA-2

Specifications

DC

Output

Offset:

(Shorted

input)

+10

millivolts.

Phase

Response:

+0,

-15

degrees

DC-20KHz

at

I

watt.

Input

Impedance:

(XLR

balanced)

20K

ohms.

(phone

jack

unbalanced)

25K

ohms

+30%.

High

Voltage

Power

Supply:

Two

800VA

transformers

with

computer

grade

capacitors

powered

through

10A

relays.

Low

Voltage

Power

Supply:

+15V

DC

supplies

are

provided

by

a

current

limited

shortproof

regulator.

Power

Requirements:

50-60Hz

AC

with

adjustable

taps

for

100,

120,

200,

220,

and

240

+10%

operation.

Draws

90

watts

or

less

on

idle

800W

at

250W

channel

output

into

8

ohms.

Turn

On:

May

be

switch

selected

for

instantaneous

or

four

second

delay

after

applying

power.

No

dangerous

transients.

Low

Frequency

Load

Protect.:

May

be

switch

selected

to

produce

shutdown

(STANDBY)

of

high

voltage

power

supply

for

DC

outputs

greater

than

26V

or

low

frequency

outputs

greater

than

26V

at

5Hz

(see

Graph

RVW.15).

Controls:

Two

position

ON/OFF

rotary

switch.

Ch.

|

and

Ch,

2

input

level

controls.

The

LOW

FREQ

PROTECT,

DELAY

and

STEREO/

MONO

slide

switches

are

located

on

the

rear

panel.

Displays:

A

yellow

LED

indicates

STANDBY

mode

activated

for

that

respective

channel.

A

pair

of

green

LED's

indicate

SIGNAL

presence

at

the

output

of

that

respective

channel.

A

pair

of

red

LED's

(IOC)

indicate

amplifier

OVERLOAD

conditions

for

that

respective

channel.

An

amber

LED

POWER

indicator

driven

by

low

power

control

supply.

Connectors:

Unbalanced

Input

-

4”

phone

jacks.

Output-color

coded

dual

binding

posts

on

standard

%4”

centers;

spaced

%”

apart

for

mono

(balanced)

output

connection.

AC

Line

-

Three

wire

20A,

120V

male

connector

with

5

ft.

cable.

Ground

Selectivity

-

2

lug

terminal

block

with

removable

shorting

strap.

Module

Plug-ins:

Standard

rear-panel

balanced

input

module

(module

replacement

information

available

upon

request).

Dimensions:

19”

standard

rack

mount

(EIA

Standard

RS-310-B)

7”

height,

1434”

behind

mounting

surface.

Handles

extend

2'4”

in

front

of

mounting

surface.

Center

of

gravity

is

5.4”

behind

the

front

panel.

Weight:

57

pounds

(25.8Kg)

net

weight.

Finish:

Satinized

aluminum

front

panel

with

gray

suede

Lexan

insert

and

black

adonized

aluminum

chassis

and

covers.

Construction:

Aluminum

chassis,

specially

designed

“flow-through”

ventalation

top

front

and

side

panels.

Heavy

duty

handles

to

ease

transport.

Plug

in

rear

panel

balanced

input

module.

Heat

Sinking:

Forced

air

with

high

efficiency

coolers.

A

two

speed

fan

with

an

intake

filter

(washable)

mounted

on

the

back

(rear)

of

the

amplifier

forces

air

through

coolers

and

out

both

the

top

and

sides

of

the

amplifier.

IV.

PSA-2

Stereo

Specifications

(Exclusive

of

Balanced

Input

Module)

Output

Power:

220

watts

per

channel

minimum

RMS

(both

channels

operating)

into

an

8

ohm

load,

20Hz-

20KHz

at

a

rated

RMS

sum

total

harmonic

distortion

of

0.05%

of

the

fundamental

output

voltage

(tested

per

FTC

specifications),

250

watts

+IdB

per

channel,

20Hz-

20K

Hz

into

8

ohms

with

no

more

than

1.0%

THD

(EIA

Std.

SE-101-A).

Output

Power

(4

ohms):

400

watts

+1dB

per

channel,

20Hz-20K

Hz

into

4

ohms

with

no

more

than

1.0%

THD

(EIA

Std.

SE

101-A).

Output

Power

(2

ohms):

685

watts

+1dB

at

IK

Hz

per

channel

into

2

ohms

with

no

more

than

1.0%

THD.

Hum

and

Noise:

|

15dB

below

rated

output

“A”

weighted

110dB

below

rated

output

(20Hz-20K

Hz).

Response:

+

0.1dB

20Hz-20K

Hz

at

|

watt

into

8

ohms

+0

-

1,5dB

DC-80K

Hz.

Harmonic

Distortion:

Less

than

0.002%

from

20Hz-

1KHz

and

increasing

linearly

to

0.05%

at

20K

Hz

at

220

watts

into

8

ohms,

per

channel.

IM

Distortion:

Less

than

0.01%

from

0.25

watts

to

220

watts

into

8

ohms

per

channel.

Slewing

Rate:

Greater

than

30

volts

per

microsecond.

Damping

Factor:

Greater

than

700,

DC

to

400Hz

into

8

ohms.

Output

Impedance:

Less

than

12

milliohms

in

series

with

less

than

1,2

microhenries.

Load

Impedance:

Rated

for

16,

8,

and

4

ohm

usage,

safe

with

all

loads.

Voltage

Gain:

20+2%

or

26dB

+.2dB

at

maximum

gain.

Input

Sensitivity:

2.1

volts

for

220

watts

into

8

ohms.

Output

Signal:

Unbalanced,

dual

channel.

V.

PSA-2

Monaural

Specifications

(Exclusive

of

Balanced

Input

Module)

Output

Power

(8

ohms):

800

watts

+

1dB;

20Hz-20K

Hz

into

8

ohms

with

no

more

than

1.0%

THD

(EIA

std.

SEIOI-A).

Output

Power

(16

ohms):

500

watts

+

1dB;

20Hz-20K

Hz

into

16

ohms

with

no

more

than

1.0%

THD

(EIA

Std.

SE-101-A).

Output

Power

(4

ohms):

1370

watts

+1dBat

IK

Hzinto4

ohms

with

no

more

than

1.0%

THD.

Frequency

Response:

+0.2dB,

DC-20K

Hz

at

|

watt

into

16

ohms.

Harmonic

Distortion:

Less

than

0.003%

from

20Hz

to

IKHz

and

increasing

linearly

to

0.08%

at

20KHz,

500

watts

into

16

ohms.

Less

than

0.005%

from

20Hz

to

1KHz

and

increasingly

linearly

to

0.12%

at

20K

Hz,

800

watts

into

8

ohms.

IM

Distortion:

Less

than

0.015%

from

0.25

watts

to

500

watts

into

16

ohms.

Less

than

0.015%

from

0.25

watts

to

700

watts

into

8

ohms.

Slewing

Rate:

Gre

:

than

60

volts

per

microsecond,

Damping

Factor:

Greater

than

700,

DC-400Hz

into

16

ohms.

Output

Impedance:

Less

than

24

milliohms

in

series

with

less

than

2.4

microhenries.

Load

Impedance:

Rated

for

16

and

8

ohm

usage,

safe

with

all

loads.

Voltage

Gain:

40

+2

or

32dB+.2dB

at

maximum

gain,

Input

Sensitivity:

2.2

volts

for

500

watts

into

16

ohms.

Output

Signal:

Balanced,

single

channel.

Channel

|

controls

are

active;

Channel

2

inactive

but

not

removed

from

operation.

VI.

PSA-2

Balanced

Input

Module

Specifications

Controls:

Channel

|

and

Channel

2

input

gain

adjust

with

the

AGC

Threshold,

is

accessible

from

the

rear

on

the

Balanced

Input

Module.

Hum

and

Noise:

-85dBm

equivalent

input

noise

20Hz-

20K

Hz,

600

ohm

source,

gain

set

at

unity.

crown

Frequency

Response:

Flat

+0.2dB

20Hz

to

20KHz.

High

and

Low

Pass

Filters:

3

pole

Butterworth

18dB/octave;

SOHz

and

1S5KHz

standard

frequencies.

(Other

roll-off

points

available;

see

Sec.

7.10

for

details.)

Slide

switch

activated.

Compressor

Action:

Range

of

compression

restricted

to

13d

B

by

design

(wider

range

would

aggravate

feedback

in

live

performance).

Threshold

adjustable

from

overload

level

of

main

amplifier

to

12dB

lower.

Balanced

Input

Voltage

Gain:

Variable

0-10

+30%.

Test

Tone:

Switch

activated

wide

spectrum

50Hz-20K

Hz

tone.

Common

Mode

Rejection:

70dB

5SHZ-3KHz

55dB

20K

Hz

(see

Graph

RVW.13).

VII.

SA2

Specifications

General

Protection:

Protection

circuitry

limits

the

output

level

to

protect

the

output

transistor

stage,

even

in

the

case

of

elevated

temperature.

Transformer

overheating

results

in

shutdown

(STANDBY)

of

that

particular

channel.

Controlled

slewing

rate

voltage

amplifiers

protect

the

unit

against

RF

burnouts.

Input

overload

protection

is

furnished

by

a

resistor

at

the

input

of

the

amplifier

to

limit

current.

DC

Output

Offset:

(Shorted

input)

+10

millivolts.

Hum

and

Noise:

|

15dB

below

rated

output

“A”

weighted

110dB

below

rated

output

(20Hz-20K

Hz).

Phase

Response:

+0,

-15

degrees

DC-20KHz

at

|

watt.

Input

Impedance:

25K

ohms

+30%.

High

Voltage

Power

Supply:

Two

800VA

tranformers

with

computer

grade

capacitors

powered

through

10A

relays.

Low

Voltage

Power

Supply:

+15V

DC

supplies

are

provided

by

a

current

limited

shortproof

regulator.

Power

Requirements:

50-60Hz

AC

with

adjustable

taps

for

100, 120,

200,

220,

and

240+

10%

operation.

Draws

90

watts

or

less

on

idle;

800W

at

220W

channel

into

8

ohms.

Turn

On:

May

be

switch

selected

for

instantaneous

or

four

second

delay

after

applying

power.

No

dangerous

transients.

Low

Fregency

Load

Protect:

May

be

switch

selected

to

produce

shutdown

(STANDBY)

of

high

voltage

power

supply

for

DC

outputs

greater

than

26V

or

low

frequency

outputs

greater

than

26V

peak

at

S5Hz

into

8

ohms.

Controls:

Two

position

ON/OFF

rotary

switch.

Right

and

Left

Input

Level

controls.

The

LOW

FREQ

PROTECT,

DELAY

and

STEREO/MONO

slide

switches

are

located

on

the

rear

panel.

Displays:

An

amber

LED

indicates

power

on.

A

pair

of

yellow

LED's

indicate

STANDBY

mode

activated

for

that

respective

channel.

Two

sets

of

fifteen

green

LED's

form

a

display

ladder

that

indicate

by

peak-hold

and

running

peak

simultaneously,

the

amplifier’s

output

level

over

a

42dB

range.

A

pair

of

red

LED's,

1OC

(Input

Output

Comparator),

indicate

amplifier

overload

for

that

respective

channel.

Connectors:

Unbalanced

Input

-

pin

jacks.

OutputColor

coded

dual

binding

posts

on

standard

4%”

centers;

spaced

¥,”

apart

for

MONO

(Balanced)

output

connection.

AC

Line

-

Three

wire

20A,

120V

male

connector

with

5

ft.

cable.

Ground

Selectivity

-

2

lug

terminal

block

with

removable

shorting

strap.

Dimensions:

19”

standard

rack

mount

(EIA

Standard

RS-310B)

7”

height,

144”

behind

mounting

surface.

Center

of

gravity

is

5.4”

behind

front

panel.

Extends

2/4”

in

front

of

mounting

surface

with

optional

handles.

Construction:

Aluminum

chassis,

specially

designed

“flow-through”

ventilation

top

and

side

panels.

Heat

Sinking:

Forced

air

with

high

efficiency

coolers.

A

two

speed

fan

with

an

intake

filter

(washable)

mounted

on

the

rear

of

the

amplifier

forces

air

thru

coolers

and

out

both

the

top

and

sides

of

the

amplifier.

Weight:

57

pounds

(25.8Kg)

new

weight.

Finish:

Satinized

aluminum

front

panel

with

gray

suede

Lexan

insert

and

black

anodized

aluminum

chassis

and

covers.

Vill.

Output

Power:

220

watts

per

channel

minimum

RMS

(both

channels

operating)

into

an

8

ohm

load,

20Hz-

20K

Hz

ata

rated

RMS

sum

total

harmonic

distortion

of

0.5%

of

the

fundamental

output

voltage.

350

watts

per

channel

minimum

RMS

(both

channels

SA2

Stereo

Specifications

R-3

|

operating)

into

a

4

ohm

load,

20Hz-20KHz

at

a

rated

RMS

sum

total

harmonic

distortion

of

0.08%

of

the

fundamental

output

voltage.

600

watts

per

channel

minimum

RMS

(both

channels

operating)

into

a

2

ohm

load,

at

IK

Hz;

rated

RMS

sum

total

harmonic

distortion

of

1.0%

of

the

fundamental

output

voltage.

Frequency

Response:

+0.

|dB

20Hz-20K

Hzat

|

watt

into

8

ohms

+0

-1.5dB

DC-80K

Hz.

Harmonic

Distortion:

Less

than

0.002%

from

20Hz-

1KHz

and

increasing

linearly

to

0.05%

at

20K

Hz,

220

watts

into

8

ohms,

per

channel.

IM

Distortion:

Less

than

0.01%

from

0.25

watts

to

220

watts

into

8

ohms

per

channel.

Slewing

Rate:

Greater

than

30

volts

per

microsecond.

Damping

Factor:

Greater

than

700,

DC-400Hz

into

8

ohms.

Output

Impedance:

Less

than

12

milliohms

in

series

with

less

than

1.2

microhenries.

Load

Impedance:

Rated

for

16,

8,

and

4

ohm

usage,

safe

with

all

loads.

Voltage

Gain:

20

+2%

or

26dB

+.2dB

at

maximum

gain.

Input

Sensitivity:

2.1

volts

for

220

watts

into

8

ohms.

Output

Signal:

Unbalanced,

dual

channel.

IX.

SA2

Monaural

Specifications

Output

Power:

700

watts

minimum

RMS

into

an

8

ohm

load,

20Hz-20K

Hz

at

a

rated

RMS

sum

total

harmonic

distortion

of

0.12%

of

the

fundamental

output

voltage.

440

watts

minimum

RMS

into

a

16

ohm

load,

20Hz-

20K

Hz

at

a

rated

RMS

sum

total

harmonic

distortion

of

0.08%

of

the

fundamental

output

voltage.

1200

watts

at

1K

Hz

into

a4

ohm

load,

ata

rated

sum

total

harmonic

distortion

of

1.0%

of

the

fundamental

output

voltage.

Frequency

Response:

+0.2dB,

DC-20K

Hz

at

|

watt

into

16

ohms.

Harmonic

Distortion:

Less

than

0.003%

from

20H7z

to

IK

Hz

and

increasing

linearly

to

0.08%

at

20K

Hz,

440

watts

into

16

ohms.

Less

than

0.005%

from

20Hz

to

IKHz

and

increasingly

linearly

to

0.12%

at

20K

Hz,

700

watts

into

8

ohms.

IM

Distortion:

Less

than

0.015%

from

0.25

watts

to

440

watts

into

16

ohms.

Less

than

0.015%

from

0.25

watts

to

700

watts

into

8

ohms.

Slewing

Rate:

Greater

than

60

volts

per

microsecond.

Damping

Factor:

Greater

than

700,

DC-400Hz

into

16

ohms.

Output

Impedance:

Less

than

24

milliohms

in

series

with

less

than

2.4

microhenries.

Load

Impedance:

Rated

for

16

and

8

ohm

usage.

Voltage

Gain:

40+

2%

or

32dB

+.2dB

at

maximum

gain.

Input

Sensitivity:

2.1

volts

for

440

watts

into

16

ohms.

Output

Signal:

Balanced,

single

channel.

Channel

1

controls

are

active;

Channel

2

inactive

but

not

removed

from

operation.

crown

X.

Panel

Configuration

10C

INDICATORS

SIGNAL

PRESENCE

INDICATORS

INPUT LEVEL

CONTROLS

STANDBY

INDICATORS

ON/OFF

INDICATOR

POWER

CONTROL

A

8

a

|

|

|

ceclae

|

™moom>

Fig.

RVW.1

PSA-2

Front

Panel

SG

4

a

kL

©

Psn-2

SeiF

ANAWZING

‘ampuricr

Pp

Q

eR

BALANCED

INPUT

MODULE

OUTPUT

BANANA

JACKS

LOW

PASS

FILTER

SWITCHES

GAIN

ADJUST

CONTROLS

HIGH PASS

FILTER

SWITCHES

TEST

TONE

GENERATOR

SWITCH

BALANCED

XLR

INPUT

JACKS

FAN

FILTER

COVER

GROUND

TERMINAL

STRIP

DELAY

SWITCH

LOW

FREQ.

PROTECT

SWITCH

STEREO/MONO

SWITCH

UNBALANCED

INPUT

JACKS

AGC

THRESHOLD

CONTROL

a9

7zoRxozZ0|

Erxe-z09

Fig.

RVW.2

PSA-2

Back

Panel