SERVICE INFORMATION AMIS120 MIXER AMPLIFIER (6ch version) CONTENTS: OPERATION MANUAL PRODUCT DESCRIPTION SCHEMATIC DIAGRAMS BOARD LAYOUTS SERVICE BULLETINS * Over the years there have been a number of revisions to this model Australian Monitor 1 Clyde Street, Silverwater NSW 2128 Australia +61 2 9647 1411 www.australianmonitor.com.
AMIS SERIES 6 0 W / 1 2 0 W M I X E R A M P L I FIER I N S TA L L AT I O N A N D O P E R AT I O N M A N UAL
I M P O RTA N T SAFETY INFORMATION 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2. Read all documentation before operating your equipment. Retain all documentation for future reference. 3. Follow all instructions printed on unit chassis for proper operation. 4. Do not spill water or other liquids into or on the unit, or operate the unit while standing in liquid. 5.
INTRODUCTION AND CONTENTS The AMIS60 and AMIS120 mixer amplifiers are designed for commercial installations. Both models operate on 230/240 VAC, 50Hz (115VAC, 60Hz) or 24 VDC, and may be desk or rack mounted (rack mount kit supplied fitted). The AMIS60 will deliver 60 watts into a load of 8 ohms, 70 volt or 100 volt line. The AMIS120 will deliver 120 watts into a load of 4 or 8 ohms, 70 volt or 100 volt line. Both Models feature 6 universal mic/line inputs.
F R O N T PA N E L 1 1 2 3 4 5 6 CH 1-6 These control the individual level for each channel input. 2 BASS There is 12dB of cut and boost at 100Hz. This EQ is the shelving type. 3 TREBLE There is 9dB of cut and boost at 10kHz. This EQ is the shelving type. 4 MASTER This controls the overall output level. 5 ON This LED indicates the unit is powered “on”.
R E A R PA N E L 11 4 7 10 1 12 3 Each channel input section has two inputs: XLR input – This is a balanced microphone input. It has an input sensitivity of 1mV. RCA input – This is an unbalanced line level input. It has an input sensitivity of 150mV. The two RCA sockets are summed to mono internally. 2 REC OUTPUT The REC output is on unbalanced RCA connectors. The output level is 300mV into 10kohm at rated output. The output is dual mono.
I N S TA L L AT I O N MOUNTING OUTPUT CONNECTIONS When rack mounting, it is advisable to allow 1 rack space above and below the amplifier. When multiple amplifiers are mounted in a rack, exhaust fans should be used on the rack. Airflow for cooling the amplifier is by convection from bottom to top and by fan left to right. The output terminal strip accepts wire sizes from 16-22AWG (1.5mm2 - 0.35mm2). The following table should be used as a guideline for cable sizes.
SETUP & TROUBLESHOOTING Levels Volume controls should aimed to be set at nominal, which is at the half or 12o’clock position. Any unused channels should be set to minimum. When establishing a mix, remember: Less is more.
DIMENSIONS PA G E 8 A M I S 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
BLOCK DIAGRAM A M I S 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
S P E C I F I C AT I O N S POWER OUTPUT (0.5%THD, 1KHZ) S/N RATIO POWER BANDWIDTH (-3DB +1DB) OUTPUT REGULATION SIZE (WXHXD) NET WEIGHT SHIPPING DIMENSIONS (WXHXD) SHIPPING WEIGHT AMIS 60 AMIS 120 60W 120W > 76dBr > 76dBr 60Hz-15kHz 60Hz-15kHz 90% 90% 482x88x313.5mm 19”x3.5”x12.3” 482x88x313.5mm 19”x3.5”x12.3” 8.5kg 18.7lb 11.0kg 24.2lb 525x175x385mm 20.7”x6.9”x15.2” 525x175x385mm 20.7”x6.9”x15.2” 10.5kg 23.1lb 13.0kg 28.6lb COMMON TO ALL MODELS THD (1KHz, -1dB) < 0.
S P E C I F I C AT I O N S AMIS 60 AMIS 120 MAINS CURRENT DRAW (240V) FULL POWER 1/3 POWER 1/8 POWER IDLE 0.75A 0.50A 0.40A 0.25A 1.5A 0.95A 0.65A 0.15A MAINS CURRENT DRAW (115V) FULL POWER 1/3 POWER 1/8 POWER IDLE 1.6A 1.0A 0.80A 0.50A 3.1A 2.0A 1.4A 0.
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 (NSW & ACT SALES) (VIC & TAS SALES) (QLD SALES) (SA & NT SALES) (WA SALES) (NZ SALES) 1 Clyde Street Silverwater NSW 2128 Private Bag 149 Silverwater NSW 1811 Phone: (02) 9647 1411 Fax: (02) 9648 3698 Email: nsw@audiotelex.com.
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”. The AMIS60 will deliver 60 watts into a load of 8 ohms, 70 volt or 100 volt line.
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. Reading from left to right the terminals are: COM 4 8 Common or “-” for low impedance speaker loads (4 or 8 ohms).
[600 Ohm Telephone Input] (115V version) Phantom Power Button This button enables or disables the 15 volts DC phantom power to all microphone XLRs. Do not plug an unbalanced microphone in to any amplifier or mixer when phantom power is switched ‘on’. The phantom voltage is connected through 4k7 1/4W resistors. The maximum current draw available per microphone is approximately 3mA.
The relay outputs are C (Common), NO (Normally Open) and NC (Normally Closed). The NO or NC selection provides the installer with the option of the relay either opening or closing a contact. This feature is normally used in conjunction with relay override attenuators (volume controls). In this application, the relay output could trigger an accessory power supply which in turn bypasses the remote attenuators. The result is that priority inputs will always be heard irrespective of the attenuator setting.
Theses inputs are pulled up to 5VDC internally through 1k resistors. The tones are generated through a combination of digital frequency modulation and analogue amplitude modulation. The output of the microcontroller IC13 (PIC16C54A) on pin 17 is a 0-5V square wave of varying frequency (depending on the tone selected). This signal is amplitude modulated using a VCA IC8 (M5222P).
The DC fuse is located on the circuit board. This is a feature of the AMIS series amplifiers, which are equipped with a current limiting circuit preventing excessive DC currents, thus eliminating the risk of blowing high tension fuses. In the unlikely event that the DC fuse actuates, the output transistors should be checked, as it is probable that the amplifier has been subjected to very extreme conditions. The DC fuses are 10A time lag fuses.
1 2 R38 100k D R3 100k RCA1B CH1 C1 4u7 3 4 5 R5 R11 100k 22K C5 R39 100k RCA1A CH2 C9 4u7 C2 R29 4k7 R30 4k7 R14 680R IC1B LM1458 Vcc1 R27 C10 4u7 R8 4k7 C33 .
XLR1 XLR3 XLR2 RCA1 J27 XLR4 RCA2 RCA3 XLR5 XLR6 J25 X3 RCA4 J33 C28 XLR7 C29 SW1 J20 J8 J2 J32 J7 J1 C31 C1 C2 J4 C4 C15 J18 C11 C14 C16 J36 C21 J9 C22 C23 C24 6368-D C36 C35 C37 J12 J37 J21 C39 C40 C27 C32 C41 J17 X1 AMIS 60/120 (6 CH) INPUT-SMD-0794-00-00 LEGEND LAYER - - C42 J35 J10 J11 C30 J39 J24 J3 C3 J16 J28 J31 C38 C13 J19 J38 C10 J15 J29 J6 C12 C9 J5 C25 J30 X2 C26 - BREAK WAY AFTER FLOW SOLDRING
IC1 R1 R30 R29 R3 R38 C5 R5 C6 R6 R9 R10 C8 R11 R39 R13 R7 R14 C17 R18 R12 C18 R40 R15 R24 R23 R16 C33 R55 R22 R26 R21 R4 R41 C20 R20 C19 C34 R28 R54 R50 R46 C43 C44 R47 R48 C46 C47 R17 R2 C7 R42 R8 IC2 R19 R25 IC4 R49 R45 R33 R43 R44 R56 R53 R52 C45 R57 IC3 R32 R31 R51 R58 R35 R37 R36 D1 R34 BOTTOM OVERLAY R27 - BREAK WAY AFTER FLOW SOLDRING
3 5 R8 10k R2 LM1458 C6 IC1B 2n7 R29 C45 6K8 50k 4u7 JP3 MUTE R34 C2 33P 50k LM1458 R50 3 P3 IC1A 120k LM1458 10k C16 1N4148 THAT2180 Vcc C3 R13 1 R12 P9 50k 35V IN 7 4u7 5 R15 4 2 R24 220K LM1458 10k Q2 BC846A R18 22k RN5 R19 47K R45 C33 R53 10u 4K7 Vcc D6 RELAY ENABLEBZX85C8V2 BC846A .
+ + C16 + + 2180C C15 P3 + J42 P8 P4 J44 P9 J39 C7 + J3 + + + J11 C45 J43 C11 J23 J22 IC5 J24 J25 P6 C19 C30 X3 ALR BLL EVC GND CHM RN4 J46 C47 + P2 C18 + J8 IC9 C33 J31 J26 J17 + J9 P1 J13 + J41 J34 J33 J32 AMIS 60/120 MIXER-SMD-0622-01 J6 J7 J37 J38 J2 J30 C28 J18 J19 6300-I + J4 J5 J1 C17 VOX Relay VCA&RLY J14 2180C C14 RN1 IC10 C32 J20 C12 Vox Mute Enable C34 + C5 J15 C35 P5 J21 RN5 P8 P7 X6 J10 + RN2 RN3 Enabled IC11
R57 R1 C6 R36 R28 R29 R27 R53 C8 C21 IC4 R30 R31 R22A R37 C40 R33 R59 R12 R6 R5 D4 R45 R35 C10 R44 IC6 C4 C43 R32 C41 C42 R23 Q2 R56 C22 R39 R52 R55 R24 C1 C38 R8 R11 R13 C3 IC2 C2 R20 R22 R9 IC1 R15 R42 C23 R46 R47 R19 D7 R4 R3 R14 C39 R43 C25 R25 C9 IC7 IC8 R21 R54 R26 R38 R40 R58 AMIS 60/120 MIXER-SMD-0622-01 D3 R34 C24 R10 Q1 D6 R7 R2 R18 R49 C46 R41 R48 R51 R50 R17 D2 D5 R16 C44 D1
1 2 3 V4 BD139 24V FAN R48 6K8 C23 100u LM358 IC5B R40 2K2 D R52 100K 4 R49 330R 2W R50 1K5 6 7 8 D15 = 20V for AMIS1202P +12V 35VDC D15 20V LM358 IC5A R51 1K2 R33 R42 0R22 Temp Cut out D16 R14 1K R53 100K D14 R19 100R V12 TIP36C TIP36C R24 V13 1K1 V11 TIP42C D5 2V7 IC2A NE5532 1N4148 .
+ + C20 R6 C1 Bal Input R4 R1 R5 16 15 14 13 12 11 10 R27 D12 - D11 + C19 INSTALLATION SERIES R49 D13 COM OUT COM OUT 24VAC 24VAC OR 35VDC D4 LK2 R7 R9 COM XF 4/8 OHM + BAT GND-CT POWER TRANSFORMER GND-CT D17 C29 C23 C25 + + C2 R2 + + V4 R36 CX2 R3 + R40 C22 + IC3 C27 Fan C6 V8 V9 R12 C4 9 C10 IC1 LK10 D9 COM XF 100V 7 + V3 C21 100V XF R29 LK6 C18 LK1 6338-F 1 C12 + R8 R39 R48 R50 R10 C3 IC4 100V out X2 R38 RY1 + R28 D10 GND-CT 8 R3
Australian Monitor Service Bulletin AMIS120 Zener diode problem 18 August 2009 We have encountered a higher than acceptable failure rate of zener diode circuit reference D15 in AMIS120 amplifiers. The Zener diode is part of the thermal protection circuit in the amplifier and in time may go short circuit and cause the amplifier to mute all audio.
AMIS120 Zener diode problem 1 2 R48 6K8 C23 100u LM358 IC5B R40 2K2 D R52 100K R50 1K5 5 R32 10K 10K 35VDC C12 47u B Temp Cut out D5 2V7 R14 1K R53 100K D14 R19 100R INPUT 2 C2 .47uF LK10 4 R3 6 R6 8 10K R9 470R R12 470R C4 100P 5 R22 X1/13 C15 22P R21 150R 8 B2 CX2 22N/400V CX1 F1 10 S/B 5 4 .
Australian Monitor Service Bulletin AMIS Mixer Amplifiers AMIS Booster Amplifier Start-Up Issues in Extreme Cold Conditions 12 March 2012 Applicable Models This bulletin applies to the AMIS250 and AMIS250P models, and older versions of the AMIS60, AMIS120, AMIS120P, AMIS120XL, AMIS1202P and AMIS480P models. For Information Only This bulletin is intended for service technicians only and is to be applied when presented with models exhibiting the issue identified below.
Australian Monitor Service Bulletin AMIS120 Mixer Amplifier AMIS120XL Mixer Amplifier AMIS120P Booster Amplifier AMIS1202P Booster Amplifier 12V Regulator Capacitors 13 March 2012 Applicable Models This bulletin applies to AMIS120, AMIS120P, AMIS120XL and AMIS1202P models manufactured prior to March 2012. For Information Only This bulletin is intended for service technicians only and is to be applied when repairing failed amplifiers. This bulletin does not apply to functional units.
Australian Monitor Service Bulletin AMIS120 Mixer Amplifier AMIS120XL Mixer Amplifier AMIS120P Booster Amplifier AMIS1202P Booster Amplifier Bridge Rectifier Upgrade 13 March 2012 Applicable Models This bulletin applies to AMIS120, AMIS120P, AMIS120XL and AMIS1202P models manufactured prior to March 2012. For Information Only This bulletin is intended for service technicians only and is to be applied when replacing failed bridge rectifiers. This bulletin does not apply to functional units.
