AUSTRALIAN MONITOR AMIS60 User 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

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. The AMIS120 will deliver 120 watts into a load of 4 or 8 ohms, [70 volt or 100 volt line]
(240V version)/[70 volt or 25 volt line] (115V version). Both Models feature 4 universal mic/line inputs,
and an insert point for additional EQ or feedback exterminator if required. The AMIS60/120 also feature a
dual RCA tape output while a balanced, 700mV XLR output is also provided to feed up to six power
amplifiers. Other standard features include on-board Bell, Pre Announce, Alert & Evac tones, Remote
Master VCA Control & dual stage priority muting. As standard, both models are self standing and come
with rubber feet. They may be stacked to a maximum of four units high. [The 115V version also has a
transformer balanced, 600 ohm telephone input] (115V version).
AC Power Inlet
The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains
power lead fitted with an IEC connector. Before plugging in a power lead, please check the rear panel of
the amplifier to ensure that the voltage switch is set correctly for your part of the world.
The operating voltage is [230/240 VAC @ 50 Hz] (240V version)/[115 VAC @ 60 Hz] (115V version).
(240V version) [The inlet is equipped with an inbuilt AC fuse holder fitted with a 4 amp fuse (ACM120) or
a 2 amp fuse (ACM60) plus a spare within the holder].
(115V version) [The inlet is equipped with an inbuilt AC fuse holder fitted with an 8 amp fuse (AMIS120)
or a 4 amp fuse (AMIS60) plus a spare within the holder].
Power consumption is approximately 125 VA for the AMIS60 and 250VA for the AMIS120.
24 Volt DC Power Inlet
The AMIS60 & AMIS120 feature optional 24VDC power to run off a battery supply if required. This is
connected via the rear terminal strip. The front panel Power Switch will not switch DC power ‘on’ or ‘off’
in DC operation. In this mode the amplifier is always ‘on’.
There is no trickle charge resistor across the diode (one diode of a bridge rectifier).
[230V/240V Slide Switch] (240V version)
The operating voltage of the amplifier is user selectable between 230V and 240V via a slide switch located
on the top left side of the rear panel. This switch should be set to match the AC voltage of your country.
The mains transformer is wound with a 230V winding plus a 10V winding internally connected.
Power Amp
The power amp is a push pull single supply amplifier driving a centre tapped transformer. The amplifier
has an overall gain of approximately x10 and the transformer has a turns ratio of approximately [x7] (240V
version)/[x5] (115V version). The sensitivity of the amp is approximately 2.7V.
A particularly good aspect of this amplifier is the current limiting circuit. The sensing circuit is a standard
rail load line limiting circuit but it is the drive circuit that is important. As transistors V12 & V14 (BC640)
turn on transistor V11 (BC639), it pulls bias current away from the amp through diodes D1 & D4 (BAV21)
and pulls drive away from the op amp IC1 (LM1458) through the diode/resistor pair D2/R12 (BAV21/2k2)
& D3/R23. Individually each topology acts to limit the current in the amp but it is the combination of the
two and the fine tuning of there interaction that produces the characteristic soft limiting without the harsh
crossover distortion. It is not until the amp is in hard clip does the amp produce the high freq crossover

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 Common or “-” for low impedance speaker loads (4 or 8 ohms).
4 Positive “+” for 4 ohm speaker loads (use with common) (AMIS120 only)
8 Positive “+” for 8 ohm speaker loads (use with common)
COM Common or “-” for 70v or100v speaker loads (maximum load of 80 ohms at 100v
AMIS120 & 160 Ohms at 100v AMIS60)
70 Positive “+” for 70v line speaker loads (use with common)
100 Positive “+” for 100v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used
simultaneously but please pay careful attention to the overall speaker load.
Note: The minimum impedance (or maximum load) at 100 volt line should be no less than 80 Ohms for the
ACM120 and no less than 160 Ohms for the AMIS60.
(115V 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 Common or “-” for low impedance speaker loads (4 or 8 ohms).
4 Positive “+” for 4 ohm speaker loads (use with common) (AMIS120 only)
8 Positive “+” for 8 ohm speaker loads (use with common)
COM Common or “-” for 25v or 70v speaker loads (maximum load of 40 ohms at 70v
AMIS120 & 80 Ohms at 70v AMIS60)
25 Positive “+” for 25v line speaker loads (use with common)
70 Positive “+” for 70v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 25/70v loads can be used
simultaneously but please pay careful attention to the overall speaker load.
Note: The minimum impedance (or maximum load) at 70 volt line should be no less than 40 Ohms for the
ACM120 and no less than 80 Ohms for the AMIS60.
Terminal Strip
The remaining terminals read as:
Spare
Tone Generator Common (use with one of the 4 tones listed below)
Pre-Announce Chime
Alert Tone
Bell Chime
Evacuation Tone
24 volt DC
Vox Relay Out
VCA

[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.
All Call Button
When pressed, the All Call button will connect the line voltage output of the amplifier to all 6 of the
switched outputs.
Speaker (Zone) Selector Switches
These 6 black buttons are for switching the line voltage output of the amplifier to any combination of the 6
available speaker zones. The maximum capacity of each speaker zone is 60 watts so care should be taken to
ensure that no individual zone is loaded down with any more than 60 watts, always remembering that the
total load for the AMIS60 is 60 watts and for the AMIS120, 120 watts in total. Eg: it is possible on the
AMIS120 to safely have one zone loaded with 60 watts and the remaining five loaded with 12 watts each.
All switches are latching and non-interlocking.
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.
Line Output
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. This
output is sourced before the master gain control so the tape output level is not influenced by the operation
of the master gain control.
Microphone Inputs
All four inputs are dual mic/line with microphone inputs being via a 3 pin XLR connector per channel. The
mic input sensitivity is 1mV @ 200 ohms. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3-
signal (cold -). Phantom power of +15 volts is available on all microphone inputs. Reading from left to
right across the rear panel, the inputs are 4, 3, 2, & 1.
Line Inputs

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, & 1.
[600 Ohm Telephone Input] (115V version)
The 600 ohm transformer balanced Telephone Input is summed with input 2 through 100k ohms.
The input sensitivity is 150mV (driving the amp to full power)
Insert Point
The Insert Point is located electronically after the master volume pot and before the balancing circuit for
the power amp and line output.
The Insert Point is a 3 conductor (Tip, Ring, Sleeve) phone socket which accepts a standard stereo 6.35mm
(1/4”) jack. The connections are:
Tip Amplifier in.
Ring Mix Output.
Sleeve Ground
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 AMIS60 &AMIS120. 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. This would normally be inputs 1 and 2; however
these channels can be removed from the priority bus via internal links. The unit is shipped from the factory
with inputs 1 and 2 having priority. The emergency tones also deactivate the relay. The relay can also be
removed from the priority bus allowing muting to occur without operation of the relay.
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. The relay contacts
are 3 amps at 125VAC/30VDC.
The relay outputs are marked in the fail safe position, i.e. power off. When power is applied and no signal
is present the relay energizes through transistor V3 (BC546). This transistor is turned on by IC5B (LM358
or equivalent). This output is normally high. Switch on and switch off times are controlled by the time
constants of the RC network of C21 and R77. The switch off time is determined by the current sinking
capabilities of the LM358 through diode D4 (BAV21 or equivalent). This time can be considered instant.
The on time is determined by the charge time of C21 (22uF) through R77 (22k). This is approximately 2
seconds. It must be remember that the relay circuit is designed to be fail safe so that when power is on the
relay is on and therefore the relay must turn off quickly (when priority is on) and on slowly (when priority
is off). This is to avoid chatter of the relay.
VCA Control
An external pot (500K) can be connected to the AMIS60/120 for remote control of the master level. The
external pot is governed by the master level of the amplifier allowing the installer to set the volume, then
lock the amplifier in a rack, leaving the user with just a master volume control that cannot go beyond the

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). The need
to have the remote pot on two wire connection means that there is a small amount of attenuation (approx
1dB) when the pot is connected. For the best audio control a log pot should be used. The control circuitry is
a DC attenuator and an inverter. When a pot is connected, the current through R64 (10k) and the pot
resistance generated from the 1/2Vcc bias voltage flows through R76 (330R). This generates a voltage
increase on the output if op amp IC7B (LM1458 or equivalent) above the reference voltage (1/2Vcc). The
second op amp IC7A (LM1458 or equivalent) inverts this voltage to a voltage difference below the
reference voltage. Thus if the pot is turned to S/C the voltage difference below the reference voltage is:
7.5(V) / 10(kohm) * 330(ohm) = 248(mV) = 248(mV) / -3(mV/dB) = -82(dB)
From this you can see that when a 500k pot is attached the initial attenuation is:
7.5(V) / 510(kohm) * 330(ohm) = 4.85(mV) = 4.85(mV) / -3(mV/dB) = -1.62(dB)
These calculations are only approximate and are used to show operation of the circuit.
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 and 2) will automatically mute. The level of the tone
generator is controlled by the pot labelled R6 (located behind the Bass adjustment pot). This pot adjusts the
level for all 4 tones.
Tones available on the AMIS60 and AMIS120 include:
- Evacuation Tone
- Alert Tone
- Bell Tone
- Pre-Announce Chime
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 envelope is controlled by the charging and discharging of the electrolytic capacitor C47
with the sink and sourcing of current on the microcontroller outputs pins 1, 2 & 13.
Page Chime Enable Button
This allows the user to disable or enable the Pre-Announce Chime. This switch does not activate the chime.
Activation is accomplished via the rear panel barrier strip (normally wired to a paging microphone). If the
pre-announce chime is connected to a paging microphone (meaning that it would be activated by the switch
on the microphone), the Page Chime Enable switch on the front panel of the amplifier allows the user to
disable the chime function on those occasions when it is not require.
VOX Muting
This feature provides automatic muting channels 3 & 4 when signal is applied to either channels 1 or 2. It is
normally used so that a paging microphone can have priority (by muting) over background music. The
muted channels will automatically ramp back up to normal volume when the signal on channels 1 and/or 2
is no longer active. The amplifier ships with the VOX muting function enabled. To disable the VOX

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 & 4 are summed through IC1B (LM1458 or equivalent) to the VCA IC4 (M5222P) which does
the muting. The VCA is held on (i.e. no attenuation) by R55 (10k) pulled to the reference voltage and the
reverse biasing of diode D3 (BAV21 or equivalent) by R22 and R21. This is to eliminate any attenuation by
the op amp IC1A (LM1458 or equivalent) and its ½ supply which may be different to the internal reference
voltage of the VCA.
The control pin of the VCA is pulled down by op amp IC1A. This op amp runs at very high gain to activate
on even very small signal. The jumper JP2 shorts out the feedback resistor thus removing the sensitivity.
The attack of the muting circuit is controlled by the charging of C13 (47uF) through R22 (100k) and the
release by the discharge if C13 through R37 (2k2). 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.
VCA M5222P pin out
1 – Output1
2 – Input1
3 – Reference voltage (½ Vcc)
4 – Gnd
5 – Control
6 – Input2
7 – Output2
Note: The M5222P is a current in, current out device. Voltage conversion is done through resistors. The
maximum input current is 50uA rms. Current gain is 0.5.
Fuse Sizes
(240V version)
Mains AMIS60, 230 VAC: 2 Amperes Slow Blow
Mains AMIS120, 230 VAC: 3.15 Amperes Slow Blow
(115V version)
Mains AMIS60, 115 VAC: 3.15 Amperes Slow Blow
Mains AMIS120, 115 VAC: 4 Amperes Slow Blow
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.

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
aOscilloscope.
bVariac.
cMultimeter.
dLoad [4Ω]
eSignal generator.
.
1.1. Connect amplifier to:
•Variac (0Vac),
•Signal generator (mic1, no signal),
•Resistive load ( 4Ωon 4Ωterminal ).
1.2. Reset controls:
•Volume controls to minimum,
•Bass/treble control to center,
•Phantom power switch to off,
•R33 & R34 (Bias adjustment pots) on the amplifier PCB fully anticlockwise.
2. Power up :
3.1 Turn on power switch and adjust voltage to 115VAC/230VAC . Watch current meter for excess
current draw. Current should not exceed 0.5A.
3.2 Check DC power supply at fuses. Should be approx. +34V (±1.5V)
3.4 Check DC voltage on mixer board. Should be approx. 15V(±0.5V)
3.5 Check 1/2 VCC on mixer board should be 8. VDC (±0.5)
3.6 Measure DC voltages on IC of mixer & input PCB's, p8 15V (+5%), p4 0V (+100mV), pl 8V
(±5%) but on power it should be P8 18V (±5%) other remain same.
3.7 Put a multimeter across R30 the meter should read 1.0mV (±5%) then slowly adjust the preset R33 so
that you get 3mV additional to the base reading.
3.8 Repeat 3.7 for R39 adjusting preset R34.
3.9 Un do step 3.1
3. AC Check :
4.1 Set signal generator to 1mV. Turn up Mic1 volume control to full. Watch for irregularities with output.
4.2 Set output to 35V using master volume control. Check voltage across Emitter resistors (on power
devices)
4.3 Voltage should be between 150 – 200mV. 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. Check sensitivity of input. – MIC 1mV (+ 10%) 22V in 4Ωload.

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).
5Function 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).
5.3 Keep signal in CH1 insert ‘INSERT-PLUG’ having external signal of different frequency the out put
should cut off and switch over to applied insert signal, check signal on inset plugs ring terminal with
respective ground should be 300mV. Remove insert plug .
5.4 Keep signal in CH1 short V/C terminals, out put should mute .
5.5 Check Phantom Switch for on/off operation. Measure Phantom voltage on an XLR inputs (should be
14.5VDC)
(Reset the phantom switch) (Phantom power on each XLR can be checked with the LED jig).
5.6 Switch off the set connect battery (24V) check for rated out put power (out put signal will clip up to
2%)
FINAL TESTING
Requirements for final testing :
a. Load 40Ω.
b. Multimeter
c. Oscilloscope
d. Microphone
e. Variac
6Check sensitivity of all channel. (Optional)
6.1 Mic input (CH1-CH4) = 1mV out put =70V (±5V)
6.2 AUX input (CH1-CH3)= 150mV out put =70V (±5V)
6.3 AUX input (CH4) =150mV out put = 32.5V (±1.5V)
6.4 Check the Power bandwidth – (68Hz ±5Hz – 15KHz ±2KHz).
6.5 Check Bass control @ 100HZ = +12dB ( TOL +1dB) and treble @ 10kHz = +10dB (tol.±1dB)
6.6 Check that input signal and output signal are in same phase by comparing CH 1 AUX Input and all
other Outputs ( 25V, 70v, 4Ω, 8Ω)
7Priority check : (optional)
7.1 Plug microphone into input 1 and oscillator to input 3. Check for muting of channel 3.
7.2 Plug microphone into input 2. Check for muting of channel 3.
7.3 Check ‘mute disable’ function. Insert Disable/Enable link (Factory set – ENABLE).
8Check 4 tone switched inputs. Set output level of tones to approx. 14Vrms (+ 2V) using evac tone.
Check Page chime button for operation. Make sure channel 3 & 4 mutes with any of the tone’s.
9Check telephone input sensitivity for CH2 (US models only)
Tel input =150 mV out put =70V.
10 Increase the signal such that you get 76V & you can see the overload protection coming on with a kink

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. VOX Muting : Enable
b. VCA Con : Disable
c. VOX Relay : Enable
LISTENING TEST
Requirements for Listening Test Setup :
a. A CD Player
b. Speaker
c. Microphone
15 Connect amplifier to the signal source and the speaker
15.1Set all tone pots at center position, switch on the amplifier and check for any turn on thump.
15.2 Connect the CD Player to an Auxiliary input (channel 4)
15.3 Set all Channel Pots at the minimum (fully counter clockwise) position.
15.4 Increase the level on the channel that has the program source connected and listen for audible
problems.
15.5Check Priority function: CH 1 over CH 3 & 4, CH 2 over CH 3 & 4 by connecting a Microphone to
Channel 1. An audio signal presented to the microphone should cause the CD player to mute
Check generated tones. With a jump wire, short one of the tone connections to the tone common connector
(rear panel) and check to ensure that the tone selected activates

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Date: 5-Feb-2003 Sheet of
File: C:\AMIS60-120 Manual\CD6289-22.DDB Drawn By:
C28
1nF
C27
1nF
VCC
V17
BC546
D12
BAV21
D11
2V7
R49
2K7
R48
10K
R47
10K
R32
1K
C16
.1u
C19
.1u
VCC
R46
4K7
R45
4K7
C3
4u7
R44
1K
C18
330P
C17
330P
R43
1K
C8
4700u
V16
TIP36C
R42
0R22
R41
0R22
V15
TIP36C
LK1
X1
X2
R40
15R/2W
D5
1N4004
C2
120p
C4
120p
VCC
R31
10R
C10
47u
F1
C7
4700u
IC2
LM7818
C11
100n
R2
0R22
R1
0R22
R25
0R22
R26
0R22
V6
TIP36C
V2
TIP36C
R10
1k
R13
1M
R5
10k
R9
47k
R33
100R
R4
3k3
R7
1k
R6
10k
R3
470R
R30
0R1
IC1A
LM1458
C1
470n
V7
BC639
V3
BD140
V9
TIP42C
V1
TIP36C
R11
1k
R22
1k V5
TIP36C
V10
TIP42C
V8
BC639
C6
470n
C5
4u7
IC1B
LM1458
R17
470R
R20
10k
R19
1k
R16
3k3
R34
100R
R14
47k
R15
10k
R21
1M
R24
1k
V4
BD140
V11
BC639
R8
330R
R18
330R
R29
100K
R27
1k
D1
BAV21
D4
BAV21
V12
BC640
C9
10n
R28
560R
D3
BAV21
D2
BAV21
R12
2k2
R23
2k2
C12
22P
C13
22P
V13
BC639
R35
22K
R36
470k
D6
1N4004
D7
1N4004
C14
47u
C15
47u
RY1
R37
560R
V14
BC640
R38
1k
R39
0R1
LK2
B1
B2
T1
S1
CX1
22n/400V CX2
220n
F2
4amp
GNDCH
TEMP CUTOUT
AMIS120 POWER AMP
C
BATTERY TERM
24VAC
35VDC
CT OUTPUT TR
4
8
FROM MIXER PCB
BP
BP
PW5
10A S/B
4
PRE AMP
6
5
3
X1/8
X1/7
PW5 PW5
PW5
PW5 PW5
BAT NEG
BAT POS
+35VDC
-IN
+IN
35VDC
CD6289-2
1
2
3
5
6
7
PW5
2
RS
2
1
2
35VDC
POWER GND
POWER GND
X1/10
X1/9
240VAC
24VDC
-T

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Date: 6-Feb-2003 Sheet of
File: C:\AMIS60-120 Manual\CD6300-1.DDB Drawn By:
GNDA
GNDA
GNDA
GNDA
GNDA
R81
1k
C53
220pF
C21
22u
D4
BAV21
C16
2n2
R82
0R
R79
10k
VCC
LK2
0R
LK1
0R
C19
4u7
C2
4u7
R37
2k2
C24
.1u
C23
4u7
C22
.1u
C10
2u2
C9
10u
V2
BC546
R15
4K7
R14
3K3
R13
4K7
R9
47K
R6
10K
R4
10k
C26
.47u
R7
10k
R8
10k
R23
10k
R25
50K
R26
50K
R27
50K
R28
50K
R29
10k
R30
10k
C25
4u7
IC3A
LM1458
IC3B
LM1458
R31
100k
R32
1K
R33
100R
R34
10K
R35
10K
R36
10K
C27
33p R38
50K
R39
50K
C28
.03u
C29
1200P
R41
6K8
R42
6K8
R44
1K
R24
10k
C38
4u7
C52
470u
C6
4u7
C39
470u
IC2
7815
R40
50K
C35
2u2
C36
2u2
R19
1K
R18
1K
1
2
3
4
5
6
7
8
910
11
12
13
14
15
16
17
18
IC13
16C54
IC8
M5222
R60
R61
R65R66
C37
2u2
R67R68R69R70R71
S1
C41
22P
C42
22P
XT1
VDD
D6
D7
D8
R72 1K8
R73 220R
R74
100R
R75
100k
C43
.47u
C45
.47u
C47
22u
IC9
7805
C48
10u
VCC
VDD
VCC
VCC
IC1B
1458
IC4
M5222
R1
10K
R2
100k
R3
10K
R111M
R12
47k R17
100k
D5
D9
BAV21
C4
4u7 C5
4u7
C8
4u7
C13
47u
C14 33p
C15
33p
VCC
R10
470R
R21
120k
R22
100k
VCC
R43
1M
C20
.1u
D3
IC10A
LM358a
R16
100k
R20
15k
R53
4k7
VCC
R55
10k
V1
BC546
R5
2k2
R62
47k
R63
47k
IC10B
LM358b
VCC
C31
4u7
IC7B
LM1458
IC7A
LM1458
R51
1k
R54
1k
R56
1k
R57
1k
R58
47k
R64
10k
R76
330
VCC
IC6
M5222
IC11A
LM1458
R78
47k
VCC
R45
22k
C3
4u7
R46
39k
C7
220p
C11
33p
R47
10k
VCC IC11B
LM1458
R52
10k
R59
10k
R48
10k
C12
4u7
AGND
AGND
IC5B
LM358
R49
10k
R50
100k C17
100n
D1
BAV21
R77
22k
RY1
24V
R80
100R
C18
100n
D2
1N4004
V3
BC546
D10
10V
IC12
LM1458
C1
470n
8
7
6
5
4
3
2
1
7
6
5
8
4
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
5
4
3
2
1
F
CHIME
18VDC
1
35VDC
AG(1/2VCC)
9X 10K
CH4
CH2
CH3
CH1
AG(1/2VCC)
TAPE OUT
1
2
3
4
8
7
6
5
CKW
POWER AMP
X1/1
X4/2
EVAC
BELL
ALERT
JP2
1
AMIS120/60 MIXER
POWER AMP
POWER AMP
LINE OUTX1/9
X1/10
CD6300-1
5VDC
1
2
3
4
5
8
1
2
3
4
5
6
7
8
8
5
4
3
2
1
X4/1
FROM IC5
TO RELAY
35V
INSERT PT
IC1A
1458

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
Title
Number RevisionSize
A3
Date: 6-Feb-2003 Sheet of
File: C:\AMIS60-120 Manual\CD6235-1.DDB Drawn By:
C11
4u7
C10
4u7
C9
4u7
C3
4u7
C2
4u7
C1
4u7
R42
10R
C34
.1u
C33
.1u
4L
3L
2L
1L
R41
220K
R40
100K
R39
100K
R38
100K
R30
4k7
R29
4k7
R28
0R
R27
10R
R26
4K7
R25
4K7
R24
4K7
R23
4K7
R8
4K7
R7
4K7
4XLR
3XLR
IC1A
LM1458
IC1B
LM1458
IC2A
LM1458
IC2B
LM1458
R1
680R
R2
680R
R3
100K
R5
22K
R6
22K
R9
22K
R10
22K
R11
100K
R13
680R
R14
680R
R15
680R
R16
680R
R17
100K
R4
220K
R12
22K
R18
22K
R19
22K
R20
22K
R21
680R
R22
680R
C4
4u7
C5
100P
C6
100P
C7
100P
C8
100P
C12
4u7
C16
4u7
C17
100P
C18
100P
C19
100P
C20
100P
C21
4u7
1R
2R
3R
4R
R
C25
4u7
C26
4u7
LR31
10K
R32
10K
R33
1K
R34
1K
R35
47K
R36
47K
R37
10R
IC3A
LM1458
C27
4u7
C28
4u7
C29
4u7
IC3B
LM1458
C30
4u7
C31
4u7
D1
C32
4u7
1XLR
2XLR
RX
100K
T1
600:600ohm
C14
4u7
C15
4u7
C13
4u7
C22
4u7
C23
4u7
C24
4u7
C
RS
1
2
3
4
7
6
5
1
2
3
4
7
6
5
8
8
+15V
+VCC
AG(1/2 VCC)
TAPE OUT
GRD
CH 1 OUT
CH 2 OUT
CH 3 OUT
CH 4 OUT
(CD)
X1/1
TAPE OUT
SW1
PHANTOM
OUTPUT
1
2
3
MIX OUT
MIX OUT
AMIS120/60 MIC INPUT
CD6235-1
TELEPHONE INPUT
+
-
GND
X2
NP
NP
NP
NP
NP
NP
NP
NP
NP
NP
NP
NP

AMIS120 Power amplifier Component list
Designator Part Type Description Manufacture code Order code
B1
B2
C1 470n Metalised Polyproplyene 63V 2125270477
C10 47u 47uF electrolytic 35V 2121230470
C11 100n 100n Metalised Polyester 100v 2124282101
C12 22P Multi layer ceramic 100V 2127181220
C13 22P Multi layer ceramic 100V 2127181220
C14 47u 47uF electrolytic 35V 2121230470
C15 47u 47uF electrolytic 35V 2121230470
C16 .1u Metalised Polyproplyene 63V 2124282101
C17 330P Multi layer ceramic 100V 2127280336
C18 330P Multi layer ceramic 100V 2127280336
C19 .1u Metalised Polyproplyene 63V 2124282101
C2 120p Multi layer ceramic 100V 2127180121
C27 1nF Metalised Polyproplyene 63V 2124182100
C28 1nF Metalised Polyproplyene 63V 2124182100
C3 4u7 4.7uF NPE electrolytic 50V 2120250479
C4 120p Multi layer ceramic 100V 2127180121
C5 4u7 4.7uF NPE electrolytic 50V 2120250479
C6 470n Metalised Polyproplyene 63V 2125270477
C7 4700u 4700uF electrolytic 40V 2121240472
C8 4700u 4700uF electrolytic 40V 2121240472
C9 10n Metalised Polyproplyene 63V 2124282101
CX1 22n/400V metalised Polyproplyene 275V 2124192022
CX2 220n metalised Polypropylene 275v
D1 BAV21 Small signal diode 2133400201
D11 2V7 Diode, zener 1/2w 2V7 2136090279
D12 BAV21 Small signal diode 2133400201
D2 BAV21 Small signal diode 2133400201
D3 BAV21 Small signal diode 2133400201
D4 BAV21 Small signal diode 2133400201
D5 1N4004 Rectifier Diode 400V/1A 2133440004
D6 1N4004 Rectifier Diode 400V/1A 2133440004
D7 1N4004 Rectifier Diode 400V/1A 2133440004
F1
F2 4amp
IC1A LM1458 I.C. Dual op-amp 2152810458
IC1B LM1458 I.C. Dual op-amp 2152810458
IC2 LM7818 Regulator 18V To-220 2151378018
LK1 0R 1/2 w Metal film resistor 0R 9111590000
LK2 0R 1/2 w Metal film resistor 0R 9111590000
R1 0R22 PW5 5W wire wound resistor 2111450228 PW5-R1
R10 1k 1/2 W Metal film resistor 9111590102
R11 1k 1/2 W Metal film resistor 9111590102
R12 2k2 1/2 W Metal film resistor 9111590222
R13 1M 1/2 W Metal film resistor 9111590105
R14 47k 1/2 W Metal film resistor 9111590473
R15 10k 1/2 W Metal film resistor 9111590103
R16 3k3 1/2 W Metal film resistor 9111590332
R17 470R 1/2 W Metal film resistor 9111590471
R18 330R 1/2 W Metal film resistor 9111590331
R19 1k 1/2 W Metal film resistor 9111590102
R2 0R22 PW5 5W wire wound resistor 2111450228 PW5-R22

R20 10k 1/2 W Metal film resistor 9111590103
R21 1M 1/2 W Metal film resistor 9111590105
R22 1k 1/2 W Metal film resistor 9111590102
R23 2k2 1/2 W Metal film resistor 9111590222
R24 1k 1/2 W Metal film resistor 9111590102
R25 0R22 PW5 5W wire wound resistor 2111450228
R26 0R22 PW5 5W wire wound resistor 2111450228
R27 1k 1/2 W Metal film resistor 9111590102
R28 560R 1/2 W Metal film resistor 9111590561
R29 100K 1/2 W Metal film resistor 9111590104
R3 470R 1/2 W Metal film resistor 9111590471
R30 0R1 PW5 5W wire wound resistor 2111450108 PW5-R22
R31 10R 1/2 W Metal film resistor 9111590100
R32 1K 1/2 W Metal film resistor 9111590102
R33 100R Cermet horizontal 2002211101
R34 100R Cermet horizontal 2002211101
R35 22K 1/2 W Metal film resistor 9111590223
R36 470k 1/2 W Metal film resistor 9111590474
R37 560R 1/2 W Metal film resistor 9111560561
R38 1k 1/2 W Metal film resistor 9111590102
R39 0R1 PW5 5W wire wound resistor 2111450108
R4 3k3 1/2 W Metal film resistor 9111590332
R40 15R/2W 2 W Metal oxide resistor 2111220150
R41 0R22 PW5 5W wire wound resistor 2111450228 PW5-R22
R42 0R22 PW5 5W wire wound resistor 2111450228 PW5-R22
R43 1K 1/2 W Metal film resistor 9111590102
R44 1K 1/2 W Metal film resistor 9111590102
R45 4K7 1/2 W Metal film resistor 9111590472
R46 4K7 1/2 W Metal film resistor 9111590472
R47 10K 1/2 W Metal film resistor 9111590103
R48 10K 10k NTC thermistor 2111911103
R49 2K7 1/2 W Metal film resistor 9111590272
R5 10k 1/2 W Metal film resistor 9111590103
R6 10k 1/2 W Metal film resistor 9111590103
R7 1k 1/2 W Metal film resistor 9111590102
R8 330R 1/2 W Metal film resistor 9111590331
R9 47k 1/2 W Metal film resistor 9111590473
RY1 Relay DPCO 2523220845
S1 Rocker switch (round) 2511213112
T1 Mains Transformer X1104
V1 TIP36C Transistor 2141600036 TIP36C
V10 TIP42C Transistor 2141300042 TIP42C
V11 BC639 Transistor 2144200639
V12 BC640 Transistor 2144200640
V13 BC639 Transistor 2144200639
V14 BC640 Transistor 2144200640
V15 TIP36C Transistor 2141600036 TIP36C
V16 TIP36C Transistor 2141600036 TIP36C
V17 BC546 Transistor 2144200546
V2 TIP36C Transistor 2141600036 TIP36C
V3 BD140 Transistor 2141400140
V4 BD140 Transistor 2141400140
V5 TIP36C Transistor 2141600036 TIP36C
V6 TIP36C Transistor 2141600036 TIP36C
V7 BC639 Transistor 2144200639
V8 BC639 Transistor 2144200639

V9 TIP42C Transistor 2141300042 TIP42C
X1 SIL6
X2 SIL2

AMIS120 Mixer Component List
Designator Part Type Description Manufacture code Order Code
C1 470n Metallised Poly 100V 2124262472
C10 2u2 Electrolytic 63V 2121260229
C11 33p Multilayer Disc Ceramic 2127280336
C12 4u7 Electrolytic 35V 2121230479
C13 47u Electrolytic 35V 2121230479
C14 33p Multilayer Disc Ceramic 2127280336
C15 33p Multilayer Disc Ceramic 2127280336
C16 2n2 Multilayer Disc Ceramic 2127181221
C17 100n Metallised Poly 100V 2124282101
C18 100n Metallised Poly 100V 2124282101
C19 4u7 Electrolytic 35V 2121230479
C2 4u7 Electrolytic 35V 2121230479
C20 .1u Metallised Poly 100V 2124282101
C21 22u Electrolytic 35V 2121231220
C22 .1u Metallised Poly 100V 2124282101
C23 4u7 Electrolytic 35V 2121230479
C24 .1u Metallised Poly 100V 2124282101
C25 4u7 Electrolytic 35V 2121230479
C26 .47u Metallised Poly 100V 2124262472
C27 33p Multilayer Disc Ceramic 2127280336
C28 .03u Metallised Poly 100V 2124282330
C29 1200P Multilayer Disc Ceramic 2127181122
C3 4u7 Electrolytic 35V 2121230479
C31 4u7 Electrolytic 35V 2121230479
C35 2u2 Electrolytic 63V 2121260229
C36 2u2 Electrolytic 63V 2121260229
C37 2u2 Electrolytic 63V 2121260229
C38 4u7 Electrolytic 35V 2121230479
C39 470u Electrolytic 35V 2121230471
C4 4u7 Electrolytic 35V 2121230479
C41 22P Multilayer Disc Ceramic 2127181220
C42 22P Multilayer Disc Ceramic 2127181220
C43 .47u Metallised Poly 100V 2124262472
C45 .47u Metallised Poly 100V 2124262472
C47 22u Electrolytic 35V 2121231220
C48 10u Electrolytic 35V 2121220100
C5 4u7 Electrolytic 35V 2121230479
C52 470u Electrolytic 35V 2121230471
C53 220pF Multilayer Disc Ceramic 2127181221
C6 4u7 Electrolytic 35V 2121230479
C7 220p Multilayer Disc Ceramic 2127181221
C8 4u7 Electrolytic 35V 2121230479
C9 10u Electrolytic 35V 2121220100
D1 BAV21 Signal Diode 2133400201
D10 10V Zener Diode 10V 2133440004
D2 1N4004 Rectifier Diode 1A 400V 2133440004
D3 Signal Diode 2133400201
D4 BAV21 Signal Diode 2133400201
D5 Signal Diode 2133400201
D6 Signal Diode 2133400201
D7 Signal Diode 2133400201
D8 Signal Diode 2133400201
D9 BAV21 Signal Diode 2133400201