AUDIO TELEX ACM2150 Manuel utilisateur

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ACM2150

Dual Channel

Power Amplifier

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Audio Telex Gommunications pty Ltd

ACN 001345482 hcorporated tn NSW

NSW & ACT QLD & NT vlc

149 Beaconsfleld Street

Prlvate Bag 149

Sllverwater NSW 2128

Australla

Ph 02 9047141',

Fax 02 9648 3698

42 Commerclal Road

PO Box 871

Fortltude Valley QLD 4006

Ph 07 3852 1312

Fax 07 32521237

2U277 tlddleboriugh Road

Box Hlll VIC 3128

PO Box lSi

Blackburn South VIC glg0

Ph 03 98907477

Fax 03 9890 7927

WA SA TAS

7164-66 Kent Street

PO Box 489

Cannlngton WA 6107

Ph 08 9356 2761

Fax 08 9356 2762

Electronlc Concepts pty Ltd

76 George Street

Thebarton SA 50gl

PO Box 7030 Hutt Street

Adelalde SA 5000

Ph 08 82349444

Fax 08 8234-%lt

K W l{cCulloch Pty Ltd

54a Albert Road

lloonahTA8 7009

Ph 03 6228 e,?,73

Fax 03 6278 1063

New

Unlt B, 11 Plermark Drlve

PO Box 512

Albany NZ '1331

Ph 09 415 9426

Fax 09 415 9864

ACM21 50

150 + 150 Watt Power Amplifier

Product Description

The ACM2l50 is a dual channel 150 + 150 watt power amplifier in a two rack unit (2RLf chassis suitable for table or direct 19"

rack mounting. The ACM2I50 has outputs for 100 volt line or 4 - 8 ohms and has an active balanced input of lOK ohms. The

ACM2I50 will operate llom 240 VAC @ 50 Hz or ll0 VAC @ 60 Hz (not user selectable, internal factory adjustment only,

specifo at the time of ordering). The ACM2I50 also features auto-sensing fan cooling and over temperature protection. The

maximum recommended load for the ACM2l50 is 65 ohms per channel for 100 volt line operation and 4 ohms per channel for

low impedance operation.

Front Panel Controls

OUtpUt Level: The input level controls are unlabelled, recessed (screwdriver adjustable) and are located in the centre of

the front panel. Turning a control clockwise will increase the output of the particular channel of the ACM2I50 towards it's

maximum output level while turning the control counter-clockwise will decrease the output level. Adjust this conkol for the

desired output level depending on the level of the input signal (from a mixer or other sigrral source). The factory default setting

for this control is I volt input will supply full load into 4 ohms.

POWef SWitCh: The rocker switch located in the front centre of the panel turns AC power on to the ACM2I50. Rocking

the power switch to the right to turns the AC power 'on'. When the AC power is 'on', the "CH A" and *CH B" LED's will glow

in the amplifier status display window.

Cooling Fans (Air lntake): tre cooling fan is temperature sensitive and will only switch on when the temperature

of the ACM2150 had reached a pre-determined range. The fan will stay on and only switch offagain once the ternperature of the

amplifier has fallen below a pre-determined level. So, the fact that the fan is not operating at any time (and most noticeably to the

operator at turn-on) does not mean that the amplifier is faulty in any way, just that it is operating within a temperature range that

does not need fan cooling for adequate heat dissipation. If the ACM2I50 is operating continually at conservative levels and

proper load conditions, it is possible that the cooling fan will not switch on at any time during normal operation. Whan operating,

the fans cause air flow from the front to the rear of the amplifier.

Amplifier Status Display Window

The status display window highlights the operating conditions of the ACM2l50.

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l. Channel A / Channel B: These LED's glow green if AC power is switched on to the ACM2l50.

High Temperature: This red LED glows if the fans have failed and the amplifier has been shut down by its,

temperature control circuitry. If this LED is glowing and the fans have not failed, it means that the amplifier is operating in

an ambient environment that is naturally too hot for fan cooling to make any difference to the temperature of the amplifier.

3. Fault: This LED glows red if there is DC present on the ourput (speaker lines) in which case the speakers will be

internally disconnected from the amplifier stage.

4- Output Level VU MeteIl Two 9 segment LED VU meters are provided to give an indication of the output signal

levels of each channelof the ACM2I50 from -21 to +3 dB. For normal operation the LED's should oscillate in and out of

the red zone' If the LED's in the red zone are lit continually, then the output level control (or the level of the input signal to

the ACM2I50) should be adjusted to reduce the ouput level. Too much output level can cause distortion and possible

damage to the connected speaker system.

Rear Panel Connections

l' 3 Pin lEC, AC Mains Power lnlet The operating voltage is 240 VAC @ so rlzor n0 VAc @ 60 FIz. The

AC power voltage level is not externally user selectable but is factory prsset (via transformer selection).-Ttt" ittl"t i,

equipped with an inbuilt AC fuse holder fitted with a 6 Amp slow blow frse plus one spare fiue. power consumption is 300

VA. Please ensure that the mains power cord is disconnected before attempting to check or replace this fuse.

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2. Output Selector Switch: This selector slide switch is used to select the output level desired. Before adjustir

this switch in any way please make sure that the AC power switch is in the "off'position. Any selection made is common

both channels and they cannot be selected independently of each other. To select an output oi 100 volts RMS (100 volt lir

or high impedance) move the switch to the left position when looking directly at the iear of the amplifier. To select r

output of 4-8 ohms (low impedance) move the switch to the right position whar looking directly at the rear of the amplifie

Note: If the incorrect setting is used this may cause serious damage to the amplifier and/or speakers and void ar

warranQr claim. Refer to your authorised dealer or Audio Telex for further information.

Output Terminal Strip: Reading from left to right these connections are as follows:

Positive connection for channel B output

Negative connection for channel B output

Spare

Positive connection for channel A output

Negative connection for channel A output

Note: These outputs (channels A & B) cannot be selected or wired for bridged mode mono operation.

DC Low Voltage Fuse Receptacles: Access the DC fuses by turning the caps half a turn counte

clockwise with a screwdriver. The value of the fuses is 5 Amps slow blow. Please ensure in"t tn" AC power switch is i

the 'off position and that the mains power cord is disconnected before attempting to check o" ""pla"" any of ther

fuses.

lnput (& Parallel Output) XLR Signal Connections: The inputs (A & B) to the ACM2I50 ar

active balanced @ lOK ohms. The pin configuration of all sockets is as follows: pin #l-earth ; pn #2-active (high, +); pi

#3-active (low, -). The output socket is to allow the original input signal to be fed on to another amplifier. As-these t\r

sockets are wired in passive parallel for each channel, the failure of any one amplifier will not affect the signal flowin

through that amplifier to another amplifier.

Fuse Sizes ACltl2150 Amplifier

tiains 240 VACI 6AmperesStowBlow

DG: 5 Amperes Slow Blow

Looking for something worthy to connect to the inputs and outputs of your neu

ACtl2150? Well, please call your nearest Audio Telex Communications office for

referral to your closest authorised Dealer or for more information on the ful

selection of our compatible sound system products.

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