AUSTRALIAN MONITOR AMIS60 Series Service Manual
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AUSTRALIAN MONITOR AMIS60 Series Service Manual

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See also: Operating Manual , Operation & Installation Manual
AMIS60/120 Series Service Manual
Product Description
Set-Up/Test Procedures
Component Lists
Full Schematics
PCB Overlays
Australian Monitor. Private Bag 149 Silverwater NSW 1811. Australia
www.australianmonitor.com.au

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Summary of Contents for AUSTRALIAN MONITOR AMIS60 Series

  • Page 1 AMIS60/120 Series Service Manual Product Description Set-Up/Test Procedures Component Lists Full Schematics PCB Overlays Australian Monitor. Private Bag 149 Silverwater NSW 1811. Australia www.australianmonitor.com.au...

  • Page 2: Product Description

    AMIS60/120 Product Description The AMIS60 and AMIS120 mixer amplifiers are designed for commercial installations. Both models operate on [230/240 VAC, 50Hz] (240V version)/[115VAC, 60Hz] (115V version) or 24 VDC, and may be desk or rack mounted (rack mount kit supplied fitted). Both amplifiers incorporate a 6 zone 100 volt line speaker zone selector with “All Call”.

  • Page 3: Terminal Strip

    distortion. This makes for nice sounding current limit that allows for soft distorted peaks to get through but limits continuous excessive current while maintaining thermal stability. Speaker Output Terminal Strip (240V version) The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier.

  • Page 4: Line Output

    [600 Ohm Telephone Input] (115V version) Switched Speaker System Speaker (Zone) Output Terminal Strip Reading from left to right, these screw terminal pairs correspond to the switched line voltage outputs and are numbered 6 through 1 as indicated on the front panel of the amplifier. For each pair, the left hand terminal is the line voltage output and the right hand terminal is the common.

  • Page 5: Insert Point

    All four inputs are dual mic/line with line/auxiliary inputs being via dual RCA connectors per channel. Line inputs 1, 2 & 3 have an input sensitivity of 150mV @ 100K ohms. Input 4 has an input sensitivity of 300mV @ 220K ohms making it suitable for high level inputs such as a CD player. Reading from left to right across the rear panel, the inputs are 4, 3, 2, &...
  • Page 6 level set on the master (front panel) control. Connection is via a 2 wire terminal strip on the rear panel of the amplifier. Shorting this input will mute the amp. The VCA IC has a Voltage/Gain ratio of approximately -3mV/dB. That is a voltage difference of approximately 300mV below the reference voltage (pin3, ~7.5V) will provide full mute (-80dB).

  • Page 7: Fuse Sizes

    muting move the jumper (labelled JP2, located just to the left and behind the level pot for channel 1) to the middle and left pins. (Factory setting is with VOX enabled with the jumper on the middle and right pins). Channels 3 &...
  • Page 8 TEST PROCEDURE MODEL - AMIS 120 1. Perform physical inspection (Visual Inspection stage). 1.1 Check: • Earth connection for good contact (XLR GND to AC earth), • All wiring points for good contacts (soldering and crimping) PRETESTING PRE TESTING SETUP REQUIREMENT Oscilloscope.

  • Page 9: Final Testing

    4.5 Check the output of all channels. 4.6 Measure 25V line 70V LINE, 8ohm (32Vac) tol.5%. 4.7 Check tape outputs (L and R) 250mV (+50mV) (Measure on RCA socket). 4.8 Check line outputs. Approx. (2.7V ± 1.5V). Function Checks : 5.1 Check that you have the header link’s on to a) Vox muting enabled (Right Side).

  • Page 10: Listening Test

    on the sine wave if it is there then reduce the voltage to 35V out and then short output. Release the shorting and check for the output. 11 Remove input signal and check for Hum & Noise (<20mVrms). 12 Reset volumes to minimum. 13 Disconnect from test bench and inspect for scratches on external paint.
  • Page 11 35VDC 0R22 0R22 0R22 560R 470R TIP36C TIP36C TIP36C TIP42C IC1A LM1458 BC639 BC640 X1/10 330P 100R 330R 1N4004 BATTERY TERM BD140 1N4004 24VAC 120p BAV21 BAV21 470n BC639 BC639 BAV21 FROM MIXER PCB TEMP CUTOUT 470k X1/7 100K 1N4004 X1/8 CT OUTPUT TR BC546...
  • Page 12 AG(1/2VCC) 100R 100R 100k 220p .03u X1/1 POWER AMP .47u TAPE OUT IC3B LM1458 IC11A BC546 LM1458 1N4004 220pF 470n POWER AMP 1200P GNDA 100n FROM IC5 X1/9 LINE OUT IC12 M5222 LM1458 100k AGND IC3A LM1458 IC1A 1458 120k IC11B GNDA LM1458...
  • Page 13 TAPE OUT 100K X1/1 +VCC 100K AG(1/2 VCC) TAPE OUT 100P 680R CH 1 OUT 680R IC1B CH 2 OUT LM1458 CH 3 OUT CH 4 OUT 100P MIX OUT TELEPHONE INPUT +15V 600:600ohm 100K MIX OUT 100K IC3A LM1458 100K 100P 680R...
  • Page 17 AMIS120 Power amplifier Component list Designator Part Type Description Manufacture code Order code 470n Metalised Polyproplyene 63V 2125270477 47uF electrolytic 35V 2121230470 100n 100n Metalised Polyester 100v 2124282101 Multi layer ceramic 100V 2127181220 Multi layer ceramic 100V 2127181220 47uF electrolytic 35V 2121230470 47uF electrolytic 35V 2121230470...
  • Page 18 1/2 W Metal film resistor 9111590103 1/2 W Metal film resistor 9111590105 1/2 W Metal film resistor 9111590102 1/2 W Metal film resistor 9111590222 1/2 W Metal film resistor 9111590102 0R22 PW5 5W wire wound resistor 2111450228 0R22 PW5 5W wire wound resistor 2111450228 1/2 W Metal film resistor 9111590102...
  • Page 19 TIP42C Transistor 2141300042 TIP42C SIL6 SIL2...
  • Page 20 AMIS120 Mixer Component List Designator Part Type Description Manufacture code Order Code 470n Metallised Poly 100V 2124262472 Electrolytic 63V 2121260229 Multilayer Disc Ceramic 2127280336 Electrolytic 35V 2121230479 Electrolytic 35V 2121230479 Multilayer Disc Ceramic 2127280336 Multilayer Disc Ceramic 2127280336 Multilayer Disc Ceramic 2127181221 100n Metallised Poly 100V...
  • Page 21 IC10A LM358a Dual op-amp DIP 8 pin 2152800358 IC10B LM358b Dual op-amp DIP 8 pin 2152800358 IC11A LM1458 Dual op-amp DIP 8 pin 2152810458 IC11B LM1458 Dual op-amp DIP 8 pin 2152810458 IC12 LM1458 Dual op-amp DIP 8 pin 2152810458 IC13 16C54 PIC 16C54-XT/P DIP 18 PIN...
  • Page 22 1/2W Metal film resistor 9111590682 1/2W Metal film resistor 9111590105 1/2W Metal film resistor 9111590102 1/2W Metal film resistor 9111590223 1/2W Metal film resistor 9111590393 1/2W Metal film resistor 9111590103 1/2W Metal film resistor 9111590103 1/2W Metal film resistor 9111590103 1/2W Metal film resistor 9111590222 100k...
  • Page 23 AMIS120 Input Component List Designator Part Type Description Part number XLR connector, female 2587210266 XLR connector, female 2587210266 XLR connector, female 2587210266 XLR connector, female 2587210266 RCA Socket 2581420102 RCA Socket 2581420102 RCA Socket 2581420102 RCA Socket 2581420102 RCA Socket 2581420102 RCA Socket 2581420102...
  • Page 24 RCA Socket 2581420102 RCA Socket 2581420102 680R 1/2watt Metal film resistor 9111590681 1/2watt Metal film resistor 9111590223 100K 1/2watt Metal film resistor 9111590104 1/2watt Metal film resistor 9111590223 680R 1/2watt Metal film resistor 9111590681 680R 1/2watt Metal film resistor 9111590681 680R 1/2watt Metal film resistor 9111590681...
  • Page 25 AMIS120-60 Parts price list Part Description Manufacturer code In house R AUD$ PCB's 120 Mixer Mixer PCB S5728MAMIS120S16 $43.38 120 Input pcb Input PCB S5728MAMIS120S17 $16.03 120 Output PCB Output PCB S5728MAMIS120S18 $71.48 Display PCB S5728MAMIS120S19 $5.13 60 Mixer Mixer PCB S5728MAMIS60S16 $43.38 60 Input pcb...
  • Page 26 Hardware Front Panel 120 S600000136 $3.69 Front Panel 60 S600000139 $3.69 S600000134 $11.36 Rack ears S600000137 $4.35 Chassis 120 S600000133 $12.28 Chassis 60 S600000133 $12.28 Barrier Strip 12 2583528312 $3.92 Phono connector 1/4" socket 2582110645 $0.86 XLRF 2587210266 1.34 XLMR 2587110227 1.08 Screw + washer...

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Amis120 series

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