Clear-com Ps-10 Troubleshooting guide

PS-1

0/PS-1

OK

Power

Supply

INSTRUCTION

and

SERVICE

MANUAL

Cv)Clear-Conm®

Intercom

systems

ALSO

INCLUDES:

RS-100A Belt-Pack

Operating

Instructions

*

11111

7th

Street

*

San

Francisco, California

94107

*

415-861-6666

CLEAR-COM

810011

10/10K/9-83

Rev.

A

PS-10/PS-10K

Operating

Instructions

Table

of

Content:

I

The

Clear-Com

Concept

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

1

II

Introduction

to

the

PS-10

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

1

Interfacing

with

Other

Systems

.-- 2

III

System

Interconnection.

5

220

VAC

Operation.

6

IV

Trouble-Shooting

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

8..........8

V

Warranty

&

Maintenance.

9

VI

Specifications.

9

RS-LOOA BELT-PACK

OPERATION

MANUAL

..11

Illustrations

Front

View/Rear

View

of

PS-10

..

3

Dual

Power

Supply

Interconnection.

.7

Daisy

Chain

System

..7

Loop-Through

System

..7

PS-10

Schematic

...

i an

I.

The

Clear-Com

Concept

Clear-Com

is

a

closed-circuit

in-

amplifier

(for

headset

or

speaker),

tercom system

that

provides

highly

and

signalling

circuitry.

intelligible,

two-way

communications

ability

in

high-

and

low-noise

en-

Clear-Com

intercoms

feature

"Auto-

vironments.

A

basic

system

con-

matic

Headset Detection;"

this

sists

of

a

Power Supply

or

Main

shuts

off

any

station's

mic

preamp-

Station

connected

to

various

Remote

lifier

when

the

mic

or

headset

is

Headset

or

Speaker Stations.

disconnected-

Therefore

an

unused,

on-line

mic

never

adds

background

Clear-Com

manufactures

a

wide

range

noise

to

the

line.

Low-impedance

of

portable,

rackmount,

and

custom-

mic

input

lines

(200

ohms)

make

mount

intercom

stations.

All are

Clear-Com

channels

virtually

immune

compatible

and

will

interface

with

to

RF

and

dimmer

noise. Remote

a

variety

of

other

communications

Stations

bridge

the

intercom

line

systems.

at

a

very high

impedance

and

place

a

minimum

load

on

the

line.

Audio

Most

Clear-Com

intercoms intercon-

level remains

constant,

and

never

nect with

two-conductor shielded fluctuates

when

stations

leave

or

microphone

cable

that

is

input

to

join

the

system.

the

stations

with

3-pin, XLR

audio

connectors.

One

wire

in

the

cable

The 28-32

volts

DC

provided

by

the

carries

DC

power

(28-32

volts) from

Power

Supply

or

Main

Station

enable

the

Power

Supply

or

Main

Station

to

the

Remote

Stations

to

operate

with

the

Remote

Stations,

and the

other

minimal

current

(headset

stations,

wire

carries

the

audio

signal. The

10

ma

quiescent;

speaker

stations,

shield

acts

as

common ground.

Only

20

ma

quiescent)

while

generating

one

termination

is

needed

through-

loud

listen

levels

(greater

than

out

the

intercom

system,

and

that's

110

dB

SPL).

The

higher

voltage

accomplished

by

one

of

the

Power

and low

current

keep

voltage

losses

Supplies

or

Main

Stations

with-

to

an

absolute minimum

in long

in

the

system.

lines.

If

the

voltage

drops

due

to

the

addition

of

extensive

cabling

Clear-Com is a

distributed

ampli-

or

many

more

stations,

Clear-Com

fier

system,

which

means

each

Main

equipment

will

continue

operating

Station

and

Remote Station

contains normally with

less than

12

volts

its

own

mic

preamplifier

power available.

II.

INTRODUCTION

TO

THE

PS-10

POWER

SUPPLY

The

PS-10

is

a

single-channel

power

for

the

entire

system;

its

rear

supply

available

as

a

portable

(PS-

panel

provides

a

termination

on/off

10)

or

a

3-1/2"

rack-mount

unit

switch.

(PS-10K).

Designed

to

operate

with

all

Clear-Com

single-channel

Remote

The

PS-10

features

a

circuit break-

Stations,

the

PS-10

is

especially

er that

protects

the

power

supply

suited

for

use

with

smaller

inter-

from

damage

caused

by

faulty

or

con

systems.

It

supplies

the

power

shorted

cable.

If a

short

occurs

(28

volts

DC

at

0.6

amps)

to

sup-

the

circuit

breaker

on

the

PS-10

port

a

maximum

of

15

headset

sta-

front panel

will

pop

out,

and

the

tions

or

5

speaker

stations.

red

LED labelled

"short"

will

glow.

Once

the

short

is

removed,

pressing

The

PS-10

terminates

the

audio

line

the

circuit-breaker button

automa-

=I.

Introduction

to

the

PS-10

Power

Supply,

continued

tically

re-sets

the

system.

the

power

supply's

location

(e.g.,

stage

manager's

or

director's

posi-

The PS-10

front

panel

provides

an

tion).

In

addition,

the

rear

panel

XLR-type,

3-pin

male

connector

for

provides

three

connectors

for

out-

convenient

output

to

an

intercom

at

put

to

the

Remote

Stations.

INTERFACING

WITH

OTHER

SYSTEMS

The

Clear-Com

AC-1O

"Adapt-A-Com"

the

headset

jack

of

a

TV

camera

is

a

universal

adapter

that

control

unit-

interfaces

the

Clear-Com

intercom

system

with another

intercom

or

Our

AC-10H

operates

with

telephone

communications

link/device.

The

systems

and

provides

a

holding

coil

AC-10

guarantees compatibility with

feature.

This

facilitates

on-line

virtually

any

in-house

intercom

you

communication

via standard

tele-

may

already

have,

be

it

a

2-,

3-,

phones

and aids in

direct com-

or

4-wire

system.

munication

between

the

director

and

remote intercom

users

via

2-

or

4-

Because

it

will

simulate

a

carbon wire

dedicated

TELCO

pairs.

mic, the

AC-1O

can

be

plugged

into

2

FRONT

VIEW

OF

THE

PS-10

SHORT

LIGHT

v

POWER

ON/OFF

SWITCH

/

OUT

PUT

CONNECTOR

SHORT

RESET BUTTON

REAR VIEW

OF

THE

PS-10

W11

5v

TERMINA-

POWER

CORD

TION

-

OUT

PUT

CONNECTORS

ON/OFF

0

3

7

I

m

SYSTEM

INTERCONNECTION

The

PS-1OK

mounts

in

a

standard

19"

If

you don't

use

Belden

cable,

use

rack,

while

the

portable

PS-10 can

an

equivalent

type

with

similar

go

anywhere.

Cable

is

run

from

the

wire

gauge

and

capacitance.

Cable

3-pin connectors

to

all

headset

and

(especially

in

longer

runs)

should

speaker

stations.

Allow

at

least

have

low

DC

resistance

(less

than

three

inches

behind

the

unit

for

15

ohms

per

1000 feet; large

diame-

cables

extending

from

the

rear

ter

conductors)

and

low

inter-

panel,

and

avoid

sharp

bends

in

the

conductor

capacitance

(less

than

or

cabling.

equal

to

55

pF/foot

of

cable,

capa-

citance

between

conductor

and

The

PS-10

provides

four

XLR-type

3-

shield).

connectors

for

intercom

output.

All

four are

internally

connected

Most Remote

Stations

(such

as

belt-

in

parallel.

packs)

each have

a

pair

of

input

and

output

connectors;

when

instal-

CHOOSING

INTERCONNECT CABLE

ling

a

system

with

these, you

can

When

choosing interconnect

cable,

"daisy-chain"

many

stations

along

keep

the

following

considerations

one

interconnect

path.

Alternate-

in

mind:

ly,

you

can

try

Clear-Com's

Quadro-

puss

Splitter

(one

line

in,

three

1)

DC

resistance

affects

crosstalk-

lines

out).

These methods simplify

In

permanent

installations,

do

installation

and

lessen

the

overall

not

use

wire

smaller

than

20

length

of

cable

in

the

system.

gauge,

stranded

(except

runs

shorter than

100

feet).

Keep

the

total

resistance

under

100

PERMANENT

INSTALLATION

CABLE

ohms.

We

recommend

you

use

vinyl-insu-

2)

The

capacitance

of

the

cable

lated

and

jacketed

cable

for

con-

affects

the

system's

frequency

nections

to

wall-mounted

or

custom-

response

and

sidetone stability.

mount intercoms;

it

costs

less and

Total

capacitance

should

not

be

is

easier

to

pull

through conduit

greater

than

.25

microfarads

than

the

rubber-insulated

cable.

(capacitance

between

conductor

and shield;

equivalent

to

an

Use

low

capacitance

cable.

We

intercom

system containing

5000

suggest

BELDEN

8762

(20

gauge,

feet

of

50

pF/foot

of

cable).

stranded)

for

applications

up

to

3) Clear-Com

intercoms operate

with

500

feet,

and

BELDEN

8760

(18

cable

that

has

no

more

than

35

gauge,

stranded)

for up

to

5000

pF

from

conductor

to

conductor,

feet.

and

no

more than

70

pF

from

conductor

to

shield. Again,

if

you

don't use

Belden

cable,

use an

equivalent

type

with

similar wire

gauge

and

capacitance.

PORTABLE

SYSTEM

CABLE

Typical

cable

for

connecting

the

If

conduit

is

available

when

in-

PS-10

to

portable

Remote

Stations

stalling

mounted

Remote

Stations,

is

rubber-Jacketed, two-conductor,

run

interconnect

cable through

the

shielded

mic

cable.

We

suggest

you

conduit

to

each

installed

intercom.

use

BELDEN

8413

(24

gauge,

stran-

ded)

for

connections

totalling

500 NOTE:

Chassis

ground

and

signal

feet

or

less, and

BELDEN

8412

(20

ground

(Pin

1

on

3-pin intercom

gauge,

stranded)

for

connections

connectors)

are

NOT

the

same

point.

that

reach

tip

to

5000

feet.

NEVER

connect

the

chassis

and

1

5

III

System Interconnection,

continued

together.

The

chassis

is

insulated

wiring,

you can

use that,

whether

0

from

the

signal

ground

with

a

capa-

it's

shielded

or not.

citor

(.01

microfarad,

1.4

kv).

This

eliminates

the

hum

and

poten-

If

you're

NOT using conduit,

and

tial

shock

hazard

that

can

arise

if

the

intercoms

don't

share

a

common

intercom

stations

are

at

a

diffe- ground,

it

is

good

engineering

rent

ground

potential- practice

to

run an

additional

ground

wire

to

tie

together

all

the

chassis

(this

decreases susceptibi-

If

the

conduit already

has

Class

II

lity

to

electrical

noise

fields)-

SYSTEM

SET-UP PROCEDURE:

1)

Route

cable

from

the

rear

panel

connectors

on

the

PS-10

to

the

Remote

Sta-

tions.

Use

any

or

all

of

the

connectors

on the

power

supply.

The pin-out

assignment

on

all

Clear-Com

intercom

connectors

is:

1--

COMMON

2--

+VDC

3--

INTERCOM AUDIO

Route

cable

away

from

heavy

AC

power sources,

such

as

lighting

panels

or

electric

motors.

In

permanent installations,

install cable

in

accordance

with

local

building

codes.

2)

Set

the

termination

on/off switch

on

the

PS-10

rear

panel

to

the

"on"

posi-

tion

if

the

unit

is

the

only

power

source

in

the

system.

3)

Plug

in

the

PS-10

power

cord

to

a

source

of

115

VAC.

Turn

on the

power

switch

(which

lights

up

when

activated).

4)

Set

the

individual

volume

controls

for

ideal

listen

levels

at

the

Remote

Stations.

220

VAC

OPERATION

1)

To

operate

from

220

VAC,

unscrew

the

rubber

feet

(or

screws)

from

the

bottom

of

the

PS-10,

remove

the

two

screws

that

secure

the

handle

to

the

top

of the

unit,

then

remove

the

cover.

2)

Refer

to

the

system

schematic included

in

this

manual,

and

re-wire

the

trans-

former

as

shown,

using

the

appropriate power

cord.

3)

Remove

the

internal

fuse

and

replace

it

with

a

1/8a,

slo-blo

fuse.

4)

Replace

cover,

handle,

and

feet/bottom

screws.

6

System

Interconnection,

continued

MULTIPLE

POWER

SOURCES

LOOP-THROUGH

SET-UP

Power

Supplies

and

Main

Stations

A

typical

configuration

might

look

can

be

paralleled

together

in

the

like

this:

intercom

system.

A

second

power

source

doubles

the

system

capacity

and

acts

as

a

back-up

if

the

other

source

goes

down.

PS-10

The

diagram

below

illustrates

the

interconnection

of

two

power

sup-

DAISYCHAIN

plies,

which

may

be

installed

at

the

same

end

of

the

intercom

line

or at

opposite

ends.

Note

that the

This

works

fine,

but

if

the

cable

termination

should

be

"on"

in only

were

cut

anywhere

along

the

signal

ONE power

source,

and

should

be path,

all

stations

would

go

down.

"off"

in

the

other(s)-

An

alternative

configuration

(shown

TmmInW]..OFF

3111

below)

solves

this

problem.

Using

two

connectors

at

the

beginning

and

PS-10

\i52_

end

of

one

cable

establishes

a

loop-through

that

prevents system

com

failure

should

a

cut

in the

line

occur.

T.nnlnhtloON

A.1.

|iS-10

;

~~~~~~~~~

..

30

f3

corn

DUAL

POWER

SUPPLY

INTERCONNECTION

LOOP-THROUGH

0

7

U.g

TROUBLE-SHOOTING

THE

PS-IO

SYMPTOM CAUSE REMEDY

System

is

totally

dead,

a.

loss

of

AC

power

a.

plug

the

power

supply

light

in

power

switch

into

a

good outlet

doesn't

come

on

b.

internal

fuse

has

b.

replace

fuse*

blown

Circuit

breaker

trips

a.

shorted

or

mis-wired

remove

cables

from

the

repeatedly,

or

"short"

interconnect

cable

power

supply,

one

at

a

LED

remains

lit

b.

defective

remote

time,

until

the

faulty

station

line

is

isolated.

Check

for

shorts

between

Pins

I

and

2

on

XLR-type

3-pin

intercom

connectors.

Hum

or

buzz

in

system

a.

inductive pick-up

a.

re-locate offending

caused

by

close proxi-

station

mity

of

power

supply

or

remote

station

to

power

lines

of

trans-

formers.

b.

ground

loop

caused

b.

reverse

power

cord;

by

improper grounding

lift

ground

of

system

(see

instal-

lation

procedure)

c.

10

ohm

chassis

ground

c.

measure resistance

be-

resistor

(RI

in

schema-

tween chassis

and

I

tic)

in

power

supply

is

of

intercom

connectors.

open**

It

should

be

10

ohms.

If

not,

open

up

the

supply,

check

and/or replace

the

resistor.

*if

the

internal

fuse

blows repeatedly,

there's

a

good

chance

that

the

bridge

rectifier

or

other

component

has shorted

inside

the

power

supply.

Bring

the

station

to

your

dealer

for

repair

or

contact

Clear-Com

**IMPORTANT:

This

is

caused

by

the

system

ground coming

in

contact

with

some-

thing

"hot"

with

respect

the

power

supply

earth

ground.

Should

this

occur,

we

recommend

you

make

a

careful

check

of

the

system

ground

and

AC

distribution

in

your

area.

THIS

IS

A

POTENTIALLY

HAZARDOUS

SITUATION;

IF

IT

OCCURS,

A

SHOCK

HAZARD

COULD

OCCUR

BETWEEN

THE

METAL

BOOMS

OF

HEADSETS

AND

GROUND.

8

.V

WARRANTY

AND

MAINTENANCE

Your

Clear-Com System

contains mod-

individually

to

ensure

that

it

ular,

solid-state equipment

that

meets

or

exceeds

all

specifica-

allows

system expansion

and

field

tions.

All

units

are

guaranteed

by

serviceability.

Efficient

ventila-

Clear-Com

against

defects

in

mat-

tion

is

inherent

in

chassis

design;

erials

and

workmanship

for one

year

the

PS-dO

can

withstand

an

ambient

following

date

of

purchase

(90

days

temperature

of

50

degrees

C

(122

for

headsets;

see

the

warranty

card

degrees

F).

Rugged

packaging

enclosed with

each

unit).

guards

against

abuse;

the

chassis

are

16

gauge

aluminum

or

stainless

steel,

with

double-sided,

glass

Our

Engineering,

Service,

and

Sales

epoxy

plug-in

PC

boards.

Our

con-

Departments

will

gladly

give

you

servatively-engineered

circuitry technical advice

and

assistance.

assures

the

longest

component

life.

If

you have

any

questions

regarding

We

shield

heavily

against

hum,

RF

operation,

modifications,

or

appli-

pick-up,

and

solid-state

dimmer

cations

of

your intercom

system,

noise.

call

us

between

8:30

and

5 pm

(Pacific

Standard

Time)

at

415-861-

Before

shipping,

we test

each unit

6666.

VI

PS-10/PS-1OK

SPECIFICATIONS

Power

Supply:

Output

Voltage:

28

volts

DC,

circuit-breaker

protected,

unregulated

Output

Current:

0.6

amps

maximum

Operating

Conditions:

Capacity:

will

support

up

to 15

headset stations

or

5

speaker

stations

System

Impedance:

200

ohms

nominal

System

Level:

-15

dB

nominal;

0

dB

before

clipping

Connectors:

Output: 3-pin,

XLR-type,

male

four

connectors

in

parallel

POWER REQUIREMENTS:

115/230

VAC,

50-60

Hz,

40

watts

max

DIM4ENSIONS:

PS-10--

6.75"w

x

7.25"

x

3.38"h

PS-10K--

19"w

x

7.25

x

3.5"

h

weight--

4

lbs,

8

oz.

ENVIRONMENTAL:

0-50

degrees

Celsius

(32-122

degrees

Fahrenheit)

t;~~~~~~~~~C

zip

: l -are

:~~O)Z

----

Z

3s

ln

--

p

¢

8-uT~trn

w

.711

CT-r'--o>

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Clear-Com PS-10 Troubleshooting guide

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