AMIS120XL 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.
AMIS120XL Circuit Description The ACM120XL is a 120 watt mixer amplifier designed for commercial installations. It features 8 microphone/line input channels and can be used for either low impedance (4 or 8 ohm) or [70v/100v] (240V version)/[25v/70v] (115V version) line speaker systems. A host of unique features including multiple levels of muting, a VOX relay output, 24 VDC operation and VCA master level control make the AMIS120XL a very flexible amplifier.
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.
The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6 power amplifiers. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3-signal (cold -). The output is electronically balanced with an inverting op-amp and buffered with voltage follower op amps. Neither hot nor cold output should be grounded when connecting as unbalanced. Tape Output Dual RCA output connectors provide a line level output with a maximum of 350mV into 10k Ohms.
The switched contacts are used to break the signal internally. When an external processor is used via the insert point, it only affects the power amplifier section and line output of the AMIS120XL. The tape output remains unprocessed. VOX Relay Output The terminal strip to the immediate right of the AC inlet features a relay output. This relay is deactivated when signal becomes present at any of the priority inputs.
Tone Generators Four separate tones are available from the in-built tone generator board. All four tones can be activated individually via a contact closure connected to the screw terminals on the rear of the amplifier. When any tone is activated, all inputs (except for inputs 1, 2 and 3) will automatically mute. The level of the tone generator is controlled by the pot labeled R63 (located behind the Bass adjustment pot). This pot adjusts the level for all 4 tones.
(47uF) through R69 (100k) and the release by the discharge if C4 through R92 (2k2). The other channels operate in a similar manner. Note that VCA will mute at 250mV (-80dB) below the reference voltage so the muting will occur only over the range of approximately (depends on VCA production batch) 7.2V to 7.5V. The charging of the capacitor occurs from approximately 1V to 8.1V.
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 a b c d e Oscilloscope. Variac. Multimeter. Load [4Ω] Signal generator. . 1.1. Connect amplifier to: • Variac (0Vac), • Signal generator (mic1, no signal), • Resistive load ( 4Ω on 4Ω terminal ). 1.2.
4.5 4.6 4.7 4.8 5 Check the output of all channels. Measure 25V line 70V LINE, 8ohm (32Vac) tol.5%. Check tape outputs (L and R) 250mV (+50mV) (Measure on RCA socket). 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). b) VCA Con. Disabled (Back Side). c) Vox relay enabled (Right Side). 5.2 Check speaker selector outputs, both individual and All Call (Check for the reverse action of the switches). 5.
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. 14 Check the thermal cut off. It should be between (95 – 105 C). Allowable up to 115C. (If the sets show thermal trip above 115 then charge (R49) to 3K9 or so). 14a Factory setting of links : a.
1 2 3 4 5 6 8 7 R30 0R1 PW5 D R5 10k R9 47k IC1A LM1458 3 C17 330P R4 3k3 2 R43 1K 1 R11 1k R3 470R R12 2k2 1M R13 R27 1k D R28 560R V15 TIP36C V12 BC640 X1/10 C27 R33 100R R8 330R 1nF D2 D1 BAV21 BAV21 V11 BC639 R35 22K R29 100K C9 10n V13 BC639 C15 22u D12 BAV21 R10 1k D6 1N4004 24VAC R45 4K7 R6 10k D5 1N4004 X2 BATTERY TERM C12 22P +IN -IN V2 TIP36C V7 BC639 BP C3 4u7 C1 470n FROM MIXER PCB V1 TIP36C R41 0R22 V9 TIP42C V3 BD140 C R2 0R22 PW5 R7 1k
1 2 3 4 5 6 C39 47u 5L D R4 47K R3 47K R5 22K C1 4u7 5R R11 12K SW1/1 R17 6K8 XLR5 SW1/2 R29 4k7 R1 680R C2 4u7 R2 680R C3 4u7 R30 4k7 C6 150P 6 R27 10R X2/1 +VCC 7 IC1B LM1458 R6 22K D AG(1/2 VCC) AG(1/2 VCC) TAPE OUT TAPE OUT GRD GRD CH 1 OUT CH 1 OUT C33 CH 2 OUT CH 2 OUT .
1 2 3 4 5 L T2 600:600ohm R46 TELEPHONE INPUT 100K TAPE OUT C32 47u R X2 R4 47K R3 47K R5 22K C1 4u7 1R R11 12K R17 6K8 1L SW1/1 XLR1 SW1/2 R29 4k7 R1 680R C2 4u7 R2 680R C3 4u7 R30 4k7 C6 150P TELEPHONE INPUT B 2R R36 47K R34 12K R33 6K8 2L SW2/1 C9 4u7 XLR2 SW2/2 R13 680R C10 4u7 R14 680R C11 4u7 C8 150P R8 4K7 6 7 IC1B LM1458 R6 22K R37 47K 3L B SW3/1 XLR3 SW3/2 R23 4K7 R45 47K C15 4u7 R16 680R C13 4u7 C17 150P R24 4K7 R38 47K C22 4u7 R44 12K R43 6K
1 2 3 JP1 4 C29 4u7 IC1A R92 2K2 R15 120K C13 .033u C4 47u R35 10K C9 22P R36 10K CH1 R5 5K6 R39 10K C6 4u7 IC1B D R40 47K R17 47K C5 4u7 R8 47K R18 6K8 R11 10K C42 5N6 R7 6K8 R20 47K C18 100P C43 .
1 2 3 4 5 6 8 7 D8 15VDC IC 8,18 C59 47u R96 10R IC17 LM78L05 C60 47u C56 470u R78 10R 1 33VDC 2 R34 220R D6 C47 47u IC8A LM358 C26 .47u R49 100K 17 3 16 4 15 5 14 EVAC 6 13 BELL 7 12 ALERT 8 11 PRE AN 9 10 R59 1M R60 100R D R65 4K7 C18 22P VCC XT1 2 C21 22P IC8B C27 LM358 .47u 1 4 D7 VCC 8 IC18 5 3 R61 2K2 C22 22u C49 470u R98 10R VCC R57 15K 18 16C54 X1/1 R63 10K V2 BC546 C65 4u7 IC15 LM7815 C51 C52 C53 C54 470u .
AMIS120 Power amplifier Component list Designator Part Type B1 B2 C1 470n C10 47u C11 100n C12 22P C13 22P C14 47u C15 47u C16 .1u C17 330P C18 330P C19 .
R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R3 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R4 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R5 R6 R7 R8 R9 RY1 S1 T1 V1 V10 V11 V12 V13 V14 V15 V16 V17 V2 V3 V4 V5 V6 V7 V8 10k 1M 1k 2k2 1k 0R22 0R22 1k 560R 100K 470R 0R1 10R 1K 100R 100R 22K 470k 560R 1k 0R1 3k3 15R/2W 0R22 0R22 1K 1K 4K7 4K7 10K 10K 2K7 10k 10k 1k 330R 47k TIP36C TIP42C BC639 BC640 BC639 BC640 TIP36C TIP36C BC546 TIP36C BD140 BD140 TIP36C TIP36C BC639 BC639 1/2 W Metal film resistor 1/2 W Metal film re
V9 X1 X2 TIP42C SIL6 SIL2 Transistor 2141300042 TIP42C
AMIS120XL Mixer Component List Designator C1 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C2 C20 C23 C24 C25 C29 C3 C30 C31 C32 C33 C34 C35 C37 C38 C39 C4 C40 C41 C42 C43 C46 C5 C6 C66 C7 C8 C9 D1 D10 D11 D12 D13 D14 D15 D16 D17 D2 D4 IC10 IC12A IC12B Part Type 4u7 4u7 4u7 470n .033u 2N7 4u7 100n 4u7 100P 22u 100n 33p 4u7 4u7 220p 4u7 47u 4u7 4u7 4u7 4u7 100P 47u 4u7 100P 4u7 47u 4u7 4u7 5N6 .
IC13 IC16A IC16B IC1A IC1B IC2A IC2B IC3A IC3B IC4A IC4B IC5 IC7A IC7B IC9 R1 R10 R100 R11 R12 R13 R14 R15 R16 R17 R18 R19 R2 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R3 R30 R31 R32 R33 R35 R36 R37 R38 R39 R4 R40 R41 R42 R43 R44 R45 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 LM1458 M5222 10K 47K 10K 10K 47K 1K 120K 120K 10K 47K 6K8 10K 10K 47K 330R 100K 47K 10K 47K 10K 47K 10K 1K 1M 1K 10K 22K 22K 10K 10K 3K3 3K3 10K 100K 47K 47K 10K 33K 33K 47K Dual op amp D
R47 R48 R5 R52 R53 R54 R6 R67 R69 R7 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R8 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R9 R90 R91 R92 R93 R94 R96 R97 R98 RN2A RN2B RN2C RN2D 47K 68K 5K6 39K 10K 100K 10K 10K 100K 6K8 1M 10K 33K 22K 10K 10K 22K 120K 100K 47K 47K 10K 100K 1M 10K 10K 47K 22K 10K 10K 22K 47K 33K 10K 2K2 2K2 2K2 10K 10K 10K 1K 1K 1K 1K Potentiometer linear Resistor Metal film 1/2W Resistor Metal film 1/2W Resistor Metal film 1/2W Resistor Metal film 1/2W Cermet Horizontal Resistor Metal film 1
AMIS120 Mic input Component List Designator 1 2 3 4 1L 1R 2L 2R 3L 3R 4L 4R C1 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C2 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C3 C30 C31 C32 C33 C34 C35 C4 C5 C6 C7 C8 C9 D1 IC1A IC1B IC2A IC2B L Part Type XLR XLR XLR XLR Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA 4u7 4u7 4u7 4u7 4u7 4u7 4u7 4u7 120P 120P 120P 4u7 120P 4u7 4u7 4u7 4u7 4u7 4u7 47u 47u 47u 4u7 47u 47u 47u .1u .
R R1 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R2 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R3 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R4 R40 R41 R42 R43 R44 R45 R46 R5 R6 R7 R8 R9 SW1/1 SW1/2 SW1/3 SW2/1 SW2/2 SW2/3 SW3/1 SW3/2 SW3/3 Dual RCA 680R 22K 12K 22K 680R 680R 680R 680R 6K8 22K 22K 680R 22K 680R 680R 4K7 4K7 4K7 4K7 10R 0R 4k7 47K 4k7 10K 10K 6K8 12K 47K 47K 47K 47K 6K8 47K 12K 47K 10R 6K8 12K 47K 100K 22K 22K 4K7 4K7 22K Dual RCA socket PCB mount Metal film resistor 1/2w Metal film resistor 1/2w Me
SW4/1 SW4/2 SW4/4 T2 600:600Ω Dip Switch 3 position Dip Switch 3 position Dip Switch 3 position Telephone isolation transformer 2510315003 2510315003 2510315003 2651280253
AMIS120 Mic input Component List Designator 1 2 3 4 1L 1R 2L 2R 3L 3R 4L 4R C1 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C2 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C3 C30 C31 C32 C33 C34 C35 C4 C5 C6 C7 C8 C9 D1 IC1A IC1B IC2A IC2B L Part Type XLR XLR XLR XLR Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA Dual RCA 4u7 4u7 4u7 4u7 4u7 4u7 4u7 4u7 120P 120P 120P 4u7 120P 4u7 4u7 4u7 4u7 4u7 4u7 47u 47u 47u 4u7 47u 47u 47u .1u .
R R1 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R2 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R3 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R4 R40 R41 R42 R43 R44 R45 R46 R5 R6 R7 R8 R9 SW1/1 SW1/2 SW1/3 SW2/1 SW2/2 SW2/3 SW3/1 SW3/2 SW3/3 Dual RCA 680R 22K 12K 22K 680R 680R 680R 680R 6K8 22K 22K 680R 22K 680R 680R 4K7 4K7 4K7 4K7 10R 0R 4k7 47K 4k7 10K 10K 6K8 12K 47K 47K 47K 47K 6K8 47K 12K 47K 10R 6K8 12K 47K 100K 22K 22K 4K7 4K7 22K Dual RCA socket PCB mount Metal film resistor 1/2w Metal film resistor 1/2w Me
SW4/1 SW4/2 SW4/4 T2 600:600Ω Dip Switch 3 position Dip Switch 3 position Dip Switch 3 position Telephone isolation transformer 2510315003 2510315003 2510315003 2651280253
AMIS120XL Tone Generator Component List Designator C150 C18 C21 C22 C26 C27 C47 C48 C49 C51 C52 C53 C54 C55 C56 C59 C60 C61 C62 C63 C64 C65 D18 D5 D6 D7 D8 D9 IC14 IC15 IC17 IC18 IC6 IC8A IC8B R34 R49 R55 R56 R57 R59 R60 R61 R62 R63 R65 R66 R68 R78 R92 R93 R94 R95 Part Type .1u 22P 22P 22u .47u .47u 47u .1u 470u 470u .
R96 R98 RN1A RN1B RN1C RN1D RY1 V1 V2 V3 XT1 10R 10R 10K 10K 10K 10K BC546 BC546 BC546 Resistor Metal film 1/2w Resistor Metal film 1/2w Resistor Metal film 1/2w Resistor Metal film 1/2w Resistor Metal film 1/2w Resistor Metal film 1/2w Relay single pole double throw Transistor TO92 Transistor TO92 Transistor TO92 Resonator 4.
