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AUSTRALIAN MONITOR AMC120 Service Information
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AUSTRALIAN MONITOR AMC120 Service Information

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Download this manual See also: Operating Manual, Operation & Installation Manual

SERVICE INFORMATION

AMC120
MIXER AMPLIFIER
CONTENTS:
OPERATION MANUAL
SCHEMATIC DIAGRAMS
BOARD OVERLAYS
TEST PROCEDURE
Australian Monitor
1 Clyde Street, Silverwater NSW 2128 Australia
+61 2 9647 1411
www.australianmonitor.com.au

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Summary of Contents for AUSTRALIAN MONITOR AMC120

  • Page 1: Service Information

    SERVICE INFORMATION AMC120 MIXER AMPLIFIER CONTENTS: OPERATION MANUAL SCHEMATIC DIAGRAMS BOARD OVERLAYS TEST PROCEDURE Australian Monitor 1 Clyde Street, Silverwater NSW 2128 Australia +61 2 9647 1411 www.australianmonitor.com.au...
  • Page 2 A M C S E R I E S 3 0W/ 60 W/12 0W/2 50 W M I XER AM PL IF IERS I NSTA LLAT I ON A N D OPE RAT I ON MAN UAL...
  • Page 3 Do not parallel- or series-connect an amplifi er output with any other amplifi er output. Australian Monitor Inc is not Always operate the unit with the AC ground wire connected to the responsible for damage to loudspeakers for any reason.

  • Page 4: Table Of Contents

    I N T R O D U C T I O N A N D C O N T E N T S The Australian Monitor AMC series of amplifi ers takes the heritage & reliabil- I N T RO D U C TI O N ity of our famous AMIS series amplifi...

  • Page 5: F Ro N T Pan El

    F R O N T PA N E L CH 1-3 These control the levels for each channel input. BASS There is 12dB of cut and boost at 100Hz. TREBLE There is 9dB of cut and boost at 10kHz. MASTER This controls the overall mixed output level.

  • Page 6: R E Ar Pa N El

    CH 1-3 MINIMUM IMPEDANCE Each channel input section has two inputs: XLR AMC30 AMC60 AMC120 AMC250 input - This is a balanced microphone input. It has Distributed Line Output an input sensitivity of 1mV. RCA input - This is an...

  • Page 7: I N S Ta Llati O N

    Airfl ow for cooling the AMC30, (1.5mm2 – 0.35mm2) or spade lugs. AMC60 & AMC120 is by convection from bottom to top. Airfl ow for cooling The following table should be used as a guideline for cable sizes.

  • Page 8: T R Ou B L Es H O O Ti N G & Bl O C K D I A G R A M

    (AMC60, AMC120 AMC250 only) Make sure the amplifi er is well ventilated. DC fuse(s) blown Refer product to local Australian Monitor dealer No sound from channels 2 & 3 Priority function is being used Remove signal (disconnect input) from channel 1 OR Disable priority function...
  • Page 9 F U N C T I O N A L N O T E S & I N T E R N A L A D J U S T M E N T S PRIORITY Channel 1 will mute channels 2 and 3. This will only occur when signal appears on channel 1, irrespective of the channel volume control.

  • Page 10: D I M En S I O N S

    D I M E N S I O N S A M C S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L PA G E 9...

  • Page 11: S P Ec I Fi C At Io N S

    S P E C I F I C AT I O N S AMC 30 AMC 60 AMC 120 AMC 250 POWER OUTPUT (0.5%THD, 1KHZ) 120W 250W S/N RATIO > 75dBr > 75dBr > 80dBr >85dBr POWER BANDWIDTH (-3DB +1DB) 85Hz-15kHz 75Hz-15kHz 75Hz-15kHz...
  • Page 12 S P E C I F I C AT I O N S AMC 30 AMC 60 AMC 120 AMC 250 THERMAL OUTPUT (W) FULL POWER 128W 259W 1/3 POWER 118W 231W 1/8 POWER 168W IDLE THERMAL OUTPUT (BTU/HR) FULL POWER 1/3 POWER 1/8 POWER IDLE...
  • Page 13 AUSTRALIA AND NEW ZEALAND w w w. a u s t r a l i a n m o n i t o r. c o m . a u SYDNEY MELBOURNE BRISBANE ADELAIDE PERTH AUCKLAND (SA & NT SALES) (NSW &...
  • Page 14 MIX OUT TAPE OUT 100P 330K 10/25 NP 330K LINE OUT 100P 680R 10/25 NP 680R 10/25 NP IC1A LM833 100P 330K 330K 10/25 NP 100P 680R 10/25 NP 680R 10/25 NP IC2B LM833 100P Australian Monitor AMC120 Mic Input...
  • Page 15 C1815 IC1B IC3A 1458 10/25 1458 1/2VCC 100k BAV21 C1815 47pf BC556 1/2VCC 100k 470/25 C1815 3.9v IC4A 1458 3.9v 4.7U 100E 1N4148 47/25 IC4B TO AMP 1458 100K 220E TO AMP 220E/2W 1000/25 LED1 Australian Monitor 12V1W AMC120 Mixer...
  • Page 16 Driver TXFR 1:1 BC639 BD139 TIP41C TIP35C TIP35C TIP35C C1815 150n/100V poly BIAS 1N4007 100E 100E 470PF 2A HRC 6A04 Mains 240 V PRIM1 (150E/5W) X 2 6A04 BD139 2200u/63V 6A04 2200u/63V PRIM2 230V 60A04 47/50 47/50 Australian Monitor AMC120 Amplifier...
  • Page 20 TEST PROCEDURE MODEL - AMC 120 1. Perform physical inspection (Visual Inspection stage). 1.1 Check: • All screws for tightness (esp. transistor bolts), • Capacitors for polarity, • Earth connection for good contact (XLR GND to AC earth), • Power transistors for shorts to heatsink, •...
  • Page 21 4.3 Voltage should be between 400mV – 500mV. Min and max values should be between 33% of the average value (i.e. min/max=0.5). 4.4 Turn master up to full. set sensitivity of mike input to 1mV. 4.5 Check the output of all channels should be 22V (± 0.1V). 4.6 Check 100V(+- 5V) at 100V terminal .
  • Page 22 THERMAL CHECK Connect load to the amplifier apply signal such that you get 42Vat out put. Check for thermal shut off at 97°C ( + 5C ) for quick temperature rise we can heat the heatsink by heat gun. LISTENING TEST Insulation test and High voltage test to be carried out as per UL Standard Procedure.