Download AMC+30 Service Information

SERVICE INFORMATION
AMC+30
MIXER AMPLIFIER
CONTENTS:
OPERATION MANUAL
SCHEMATIC DIAGRAMS
COMPONENT OVERLAYS
TEST PROCEDURE
REPLACEMENT PARTS LIST
SERVICE BULLETIN
Australian Monitor
1 Clyde Street, Silverwater NSW 2128 Australia
+61 2 9647 1411
www.australianmonitor.com.au
AMC SERIES
+
30W/60W/120W/250W MIXER AMPLIFIERS
INSTALLATION AND OPERATION MANUAL
IMPORTANT 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. Make sure power outlets conform to the power requirements listed
on the back of the unit.
6.
Do not use the unit if the electrical power cord is frayed or broken.
The power supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against them,
paying particular attention to cords and plugs, convenience
receptacles, and the point where they exit from the appliance.
7. Always operate the unit with the AC ground wire connected to the
electrical system ground. Precautions should be taken so that the
means of grounding of a piece of equipment is not defeated.
8. Mains voltage must be correct and the same as that printed on the
rear of the unit. Damage caused by connection to improper AC voltage
is not covered by any warranty.
13.
Do not block fan intake or exhaust ports. Do not operate equipment
on a surface or in an environment which may impede the normal flow
of air around the unit, such as a bed, rug, weathersheet, carpet,
or completely enclosed rack. If the unit is used in an extremely dusty
or smoky environment, the unit should be periodically “blown free”
of foreign matter.
14. Do not remove the cover. Removing the cover will expose you
to potentially dangerous voltages. There are no user serviceable
parts inside.
15. Do not drive the inputs with a signal level greater than that required
to drive equipment to full output.
16. Do not connect the inputs / outputs of amplifiers or consoles to any
other voltage source, such as a battery, mains source, or power supply,
regardless of whether the amplifier or console is turned on or off.
17.
Do not run the output of any amplifier channel back into another
channel’s input. Do not parallel- or series-connect an amplifier output
with any other amplifier output. Australian Monitor Inc is not
responsible for damage to loudspeakers for any reason.
18. Do not ground any red (“hot”) terminal. Never connect a “hot” (red)
output to ground or to another “hot” (red) output!
19. Non-use periods. The power cord of equipment should be unplugged
from the outlet when left unused for a long period of time.
9. Have gain controls on amplifiers turned down during power-up
to prevent speaker damage if there are high signal levels at the inputs.
20. Service Information Equipment should be serviced by qualified service
personnel when:
10 Power down and disconnect units from mains voltage before making
connections.
A. The power supply cord or the plug has been damaged.
B. Objects have fallen, or liquid has been spilled into the equipment
C. The equipment has been exposed to rain
11. Never hold a power switch in the “ON” position if it won’t stay
there itself!
12. Do not use the unit near stoves, heat registers, radiators, or other heat
producing devices.
D. The equipment does not appear to operate normally, or exhibits a marked change in performance
E. The equipment has been dropped, or the enclosure damaged.
THIS SAFETY INFORMATION IS OF A GENERAL NATURE AND MAY BE SUPERSEDED BY INSTRUCTIONS CONTAINED WITHIN THIS MANUAL
INTRODUCTION AND CONTENTS
INTRODUCTION
3
FRONT PANEL
4
REAR PANEL
5
INSTALLATION
6
Master volume and overall treble and bass controls are provided, along with Vox
triggered muting (defeatable), giving channel 1 priority over inputs 2, 3 and 4.
There is also the facility to add a tone generator card.
TROUBLESHOOTING AND BLOCK DIAGRAM
7
FUNCTIONAL NOTES AND INTERNAL ADJUSTMENTS
8
The Australian Monitor AMC+ series gives the contractor a low cost alternative
in applications that are price sensitive, but still require a high quality of sound
reproduction and reliability.
DIMENSIONS
9
The Australian Monitor AMC+ series of amplifiers takes the heritage and
reliability of our famous AMIS series amplifiers and integrates these features
into low cost amplifiers for applications where reliability is everything, but the
more elaborate features of our AMIS series are not required.
Available in 30, 60, 120 and 250 watt versions, the AMC+ series are 2 RU mixer
amplifiers, featuring 70/100 volt line and 4 ohm outputs, and 4 universal
mic/line inputs.
SPECIFICATIONS
10 – 11
AUS, EUR, USA
Copyright 1st Apr 2005
Rev A: 1st Apr 2005
Rev B: 6th Jun 2006
Rev C: 26th May 2008
CAUTION
This symbol is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the products enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK),
NO USER SERVICEABLE PARTS INSIDE,
REFER SERVICING TO QUALIFIED SERVICE PERSONAL.
This symbol is intended to alert the user to the presence of important
operational and maintenance (servicing) instructions in the literature
accompanying the appliance.
Caution:
WARNING!
To prevent electric shock do not use this (polarised) plug with an extension
cord, receptacle or other outlet unless the blades can be fully inserted to
prevent blade exposure. To prevent electric shock, match wide blade of
plug to wide slot, fully insert.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
PAGE 3
front PANEL
1
2
3
4
5
6
1 CH 1–4
These control the levels for each channel input.
2 Bass
There is 12dB of cut and boost at 100Hz.
3 Treble
There is 9dB of cut and boost at 10kHz.
4 Master
This controls the overall mixed output level.
5 On
This LED indicates the unit is powered “on”.
6 Power
This switch switches power on or off the mains. The up position is on.
PAGE 4
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
REAR PANEL
5
4
7
6
1 CH 1–4
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.
3
2
Minimum Impedance
1
AMC+30 AMC+60 AMC+120
AMC+250
166ohm 333ohm 83ohm 166ohm 41ohm
83ohm
20ohm
40ohm
4ohm 4ohm 4ohm
4ohm
Distributed Line Output
70V (115V version) 100V (230/240V version) Low Impedance Output
2 REC Output
The REC output is on unbalanced RCA connectors. The output
level is 150mV into 10kohm at rated output. The output is
dual mono.
The REC output is not affected by the MASTER volume control
or the BASS and TREBLE controls.
The REC output does not receive the tone signal if the optional
tone generator module is installed.
(both versions)
Note: Only connect one output – either Distributed Line or Low Impedance per channel.
Do not connect LowZ and 70/100V at the same time.
The output strip comes fitted with a touch-proof cover held in place by two M3 machine screws
with flat and spring washers.
5 IEC Mains Input Socket
3 Line Output
The LINE output is on a balanced XLR connector. The output
level is 0.775V into 1k at rated output.
Note: When wiring the LINE output as unbalanced, Pin2
should be wired as hot and Pin1 should be wired as ground/
shield. Do not wire Pin3.
4 Direct Out
This is a standard IEC 3 pin socket. It accepts a standard IEC mains cable, provided. The fuse
draw at 5 contains the mains fuse and a spare. The mains fuse is a time lag (slow blow)
HRC 20mm x 5mm ceramic type fuse.
The ratings are:
AMC+30 AMC+60 AMC+120 AMC+250
230V/240V model
115V model 0.5A 1.6A 2A
2.15A
1A 3.15A 4A
6.3A
Always replace the fuse with one of the same value and type.
The speaker connections are on the 12 pole terminal strip.
There is a low impedance output (OHM) and a distributed line
voltage output (LINE). 70V out is available on 115V models.
100V out is available on 230V/240V models.
Note: Always disconnect power to the amplifier before replacing fuses.
6 (Optional) Tone Module
These terminals are for use with an optional tone module (not supplied). Use Australian Monitor
ATC5488 module.
7 Phantom Power
12V phantom power is available for condenser or electret microphones on the XLR input when
this switch is pushed in.
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
PAGE 5
installation
Mounting
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 AMC30, AMC60 and AMC120 is by
convection from bottom to top. Airflow for cooling the AMC250 is by fan from
front to side.
Direct Output
The output terminal strip accepts wire sizes from 16-22AWG
(1.5mm2 – 0.35mm2) or spade lugs. The following table should be used as a
guideline for cable sizes. Regulations in your area may require different gauged
wire and should be checked before using.
Output Wire Size
Distance
AMC 30 AMC+60 AMC+120 AMC+250
100V Up to 50m AWG26(0.12mm2)
AWG26(0.12mm2) AWG24(0.2mm2)
AWG22(0.35mm2)
50m–200m AWG24(0.2mm2) AWG20(0.5mm2) AWG18(0.75mm2)
AWG16(1.5mm2)
Over 200m AWG20(0.5mm2) AWG18(0.75mm2) AWG16(1.5mm2)
AWG13(2.5mm2)
70V Up to 50m AWG26(0.12mm2) AWG24(0.2mm2) AWG22(0.35mm2)
AWG18(0.75mm2)
50m–200m AWG20(0.5mm2) AWG18(0.75mm2) AWG16(1.5mm2)
AWG13(2.5mm2)
Over 200m AWG18(0.75mm2) AWG16(1.5mm2) AWG13(2.5mm2)
AWG10(6.0mm2)
4 ohm Up to 10m AWG18(0.75mm2) AWG18(0.75mm2) AWG18(0.75mm2)
AWG18(0.75mm2)
10m–30m AWG13(2.5mm2) AWG13(2.5mm2)
AWG13(2.5mm2)
AWG13(0.35mm2)
Over 30m Not Recommended Not Recommended Not Recommended
Not Recommended
+
Note: Only connect one output – either Distributed Line or Low Impedance.
Line Output
The LINE output XLR can be used to connect up to 6 booster amplifiers. Balanced wiring (shielded
pair cable) is recommended.
Note: When wiring the LINE output as unbalanced, Pin2 should be wired as hot and Pin1 should
be wired as ground/shield. Do not wire Pin3.
REC Output
The REC output wiring
should be kept as short
as possible.
Input Connections
For wiring balanced in, pin 2 is hot.
Unbalanced wiring on the microphone
inputs is not recommended.
Balanced input wiring (shielded pair cable)
is recommended. Unbalanced RCA wiring
should be keep as short as possible.
PAGE 6
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
troubleshooting and block diagram
Troubleshooting Guide
Trouble
Likely Cause
Remedy
Power LED not on
Power not reaching amplifier
Check power switch is on
Check mains connection
Check mains fuse
Distorted sound
Output is short circuit
Check speaker loads for shorts
Input is overloaded
Reduce input level at source
Output is being over driven
Reduce volume levels on front panel
Bass control is turned up
Reduce Bass control level
Volume controls down
Check volume controls
Amplifier has overheated
(AMC+60, AMC+120 AMC+250 only)
Check for obstructions above and below
Make sure the amplifier is well ventilated
DC fuse(s) blown
Refer product to local Australian Monitor dealer
No sound from channels 2 and 3
Priority function is being used
Remove signal (disconnect input) from channel 1 OR
Disable priority function (see Internal Adjustments)
Tones do not sound when triggered
Tone generator module not installed
Purchase optional Tone generator module
No sound but amp is on
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
PAGE 7
functional notes and internal adjustments
PRIORITY
Channel 1 will mute channels 2, 3 and 4. This will only occur when signal appears on channel 1, irrespective of the channel volume control.
Priority can be disabled. (See below). The release time is approx. 3 secs and is NOT adjustable. The mute depth is approx. 40dB and is not adjustable.
PAGE 8
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
dimensions
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
PAGE 9
specifications
AMC+ 30 AMC+ 60 AMC+ 120
AMC+ 250
30W 60W 120W
250W
> 75dBr > 75dBr > 80dBr
>85dBr
85Hz-15kHz 75Hz-15kHz 75Hz-15kHz
30Hz-20kHz
1.0A 0.5A 1.6A (x2) 3.15A 1.6A 4A 4A
2A
8A
6.3A
3.15A
10A (x2)
96% 93% 93%
90%
SIZE (WXHXD) 482 x 88 x 190mm 19” x 3.5” x 7.5” 482 x 88 x 281mm 19” x 3.5” x 11.1” 482 x 88 x 281mm
19” x 3.5” x 11.1”
482 x 88 x 384mm
19” x 3.5” 15.1”
NET WEIGHT 6.0kg 13.2lb 8.5kg 18.7lb 10.5kg
23.1lb
11.5kg
25.3lb
SHIPPING WEIGHT 7.5kg 16.5lb 10.5kg 23.1lb 12.5kg
27.6lb
14kg
30.8lb
510 x 145 x 297mm 20.1” x 5.7” x 11.7” 525 x 175 x 385mm 20.7” x 6.9” x 15.2” 525 x 175 x 385mm
20.7” x 6.9” x 15.2”
525 x 185 x 470mm
20.7” x 7.3” x 18.5”
MAINS CURRENT DRAW (240V)
FULL POWER 1/3 POWER 1/8 POWER IDLE 0.35A 0.23A 0.17A 0.08A 0.66A 0.44A 0.32A 0.13A 1.20A
0.80A
0.55A
0.15A
2.53A
1.61A
1.10
0.15A
MAINS CURRENT DRAW (115V)
FULL POWER 1/3 POWER 1/8 POWER IDLE 0.73A 0.48A 0.35A 0.17A 1.38A 0.92A 0.67A 0.27A 2.50A
1.67A
1.15A
0.31A
5.28A
3.36A
2.30A
0.31A
THERMAL OUTPUT (W)
FULL POWER 1/3 POWER 1/8 POWER IDLE 38W 33W 26W 11W 67W 63W 51W 19W 128W
118W
91W
26W
259W
231W
168W
26W
THERMAL OUTPUT (BTU/HR)
FULL POWER 1/3 POWER 1/8 POWER IDLE 130 113 90 38 229 215 172 65 437
403
311
89
884
788
573
89
POWER OUTPUT (0.5%THD, 1KHZ) S/N RATIO POWER BANDWIDTH (-3dB +1dB) FUSES MAINS (115V) MAINS (230/240V) DC OUTPUT REGULATION SHIPPING DIMENSIONS (WXHXD) *1/3 and 1/8 power levels relate to voltage changes, not load changes.
PAGE 10
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
specifications
COMMON TO ALL MODELS
THD (1KHz, -1dB) Better than 0.5%
MIC INPUT SENSITIVITY IMPEDANCE HEADROOM 1mV @ 200ohm
1k3 ohm
77mV (37dB)
AUX INPUT SENSITIVITY IMPEDANCE HEADROOM 0.5V+/@100kohm
>200kohm
> 15V (>30dB)
TONE CONTROL BASS @ 100HZ TREBLE @ 10KHZ +/- 12 dB
+/- 9 dB
LINE OUT NOMINAL OUTPUT OUTPUT IMPEDANCE 0.775V @ 1kohm
100ohm
REC OUT NOMINAL OUTPUT OUTPUT IMPEDANCE 250mV @ 10kohm
1kohm
AMC+ SERIES INSTALLATION AND OPERATION MANUAL
PAGE 11
AUSTRALIA AND NEW ZEALAND
www.australianmonitor.com.au
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:
[email protected]
22/277
Middleborough Road
Box Hill VIC 3128
PO Box 151 Blackburn
South VIC 3130
Phone: (03) 9890 7477
Fax: (03) 9890 7977
Email:
[email protected]
42 Commercial Road
Fortitude Valley
QLD 4006
PO Box 2578 Fortitude
Valley BC QLD 4006
Phone: (07) 3852 1312
Fax: (07) 3252 1237
Email:
[email protected]
31 Walsh Street
Thebarton
SA 5031
PO Box 157
Hindmarsh SA 5007
Phone: (08) 8352 4444
Fax: (08) 8352 4488
Email:
[email protected]
3/11 Howe Street
Osborne Park WA 6017
PO Box 1281
Osborne Park BC
WA 6916
Phone: (08) 9204 0200
Fax: (08) 9244 3783
Email:
[email protected]
9C Piermark Drive
Albany 0752
New Zealand
PO Box 300-512
Albany 0752
Phone: (09) 415 9426
Fax: (09) 415 9864
Email:
[email protected]
EUROPE / ASIA / MIDDLE EAST
www.australianmonitor.com.au
INTERNATIONAL SALES
1 Clyde Street Silverwater NSW 2128 Australia
Private Bag 149 Silverwater NSW 1811
Phone: + 61 2 9647 1411
Fax: + 61 2 9748 2537
Email: [email protected]
1
2
3
4
5
RCA3
RCA 2P
6
7
8
R20
1K
TAPE OUT
RCA1A
RCA-4POLE
L
R21
1K
R2
330K
R6
4k7
A
R
R3
330K
C8
10/25 NP
R4
680R
C9
10/25 NP
R19
10R
C2
470p
CN1
6
R1
680R
C7
10/25 NP
R29
4k7
IC1B
LM833
C11
.1u
R5
4k7
C1
R28
4k7
7
5
GRD
AG(1/2 VCC)
+VCC
CH 1 OUT
CH 2 OUT
CH 3 OUT
CH 4 OUT
MIX OUT
MIX OUT
TAPE OUT
1
2
3
4
5
6
7
8
9
10
C10
4u7
8
XLR1
3
2
1
A
VCC
VCC
G
XLR-FEMALE
C25
4u7
470p
CON10
RCA1B
RCA-4POLE
L
R7
330K
XLR5
C13
10/25 NP
R8
330K
R
G
B
C21
4u7
R9
4k7
R11
680R
XLR2
3
2
1
XLR-FEMALE
C14
10/25 NP
C15
10/25 NP
C3
B
C12
4u7
VCC
1
IC1A
LM833
C24
10/25
R10
4k7
470p
VCC
R18
4k7
R15
330K
R
C17
10/25 NP
R20
10R
G
R16
680R
C18
10/25 NP
R13
680R
C16
10/25 NP
C6
470p
C19
4u7
8
6
XLR3
3
2
1
XLR-FEMALE
7
C5
R33
4k7
.1u
R17
4k7
470p
R26
4k7
R
R23
330K
C26
10/25 NP
R24
680R
C27
10/25 NP
R25
680R
C28
10/25 NP
G
C30
470p
C31
4u7
8
6
XLR4
3
2
1
XLR-FEMALE
7
5
IC2B
LM833
D
C29
R35
4k7
R34
4k7
1
C32
4.7u
VCC
2
SW1A
P/P
4
D
R27
4k7
470p
3
3
C20
R22
330K
RCA2B
RCA-4POLE
L
2
C
5
IC2B
LM833
R32
4k7
1
C23
10/25
R14
330K
RCA2A
RCA-4POLE
L
C
1/2VCC
3
4
R31
4k7
LINE OUT
470p
C4
R30
4k7
XLR-MALE
C22
4u7
2
R12
680R
3
2
1
REV
A
B
C
D
E
F
REVISION NOTE:
DRN
Added 4th channel & P/P
CKW
AUSTRALIAN MONITOR
DATE
14/02/08
DRAWING No:
SIL/16/0339
DESCRIPTION:
AMC 120/60/30 MIC INPUT
DRAWN BY:
DATE: 2009-5-5
5
6
7
SHEET 1
8
of 1
1
2
3
4
5
6
7
8
A
A
+M
D6
T1
A1145
R13
100E
C7
100/35
D3
1N4148
C3
47uF/25
2A S/B
1N4007
D2
1N4148
R3
150E
F?
R12
R19
T6
A1145
2K2
470E
R10
6K8
R14
2K2
T11
C3421
T13
TIP35
D8
1N4007
D4
1N4007
R15
100E
R21
T9
C1815
R11
6K8
B
R4
100E
T7
BD139
R5
100E
CN1
1
2
3
C1
220n
R1
T2
A1145
5k6
R2
18k
T3
A1145
PR1
2K
15PF
C16
220PF/50V
T5
C1815
R26
68E
R28
0.22E/5W
T10
A1015
C4
R29
10E/2W
R31
10E/2W
COM
PRIM
100V
47E
C11
0.1uF/100V
C10
0.1uF/100V
D5
1N4007
T14
TIP36
T12
A1358
470E
C17
470u/50V
D9
COM
1N4007
T8
C2705
R7
68E
B
4E
1mm/13T
R24
R17
82E
R20
R6
68E
L1
R30
R23
220R
C5
R32 R9
330E
T4
C1815
R27
0.22E/5W
C9
47/25
10E/1W
R8
18k
330E
C2
180p
R25
68E
C6
47/25
R16
1K2
+M
47E
R22
220R
D1
100/35 1N4007
R18
0E
-M
D7
1N4007
F?
C
C
2A S/B
C8
100/35
+M
D10
CN2
1
2
3
CON2
1N5402
D12
1N5402
D11
1N5402
D13
1N5402
C14
2200uF/35V
C15
2200uF/35V
-M
D
D
REV
A
B
C
D
E
F
1
2
3
4
REVISION NOTE:
DRN
Added output cap
Increased gain, R1,2,8,C2
CKW
CKW
AUSTRALIAN MONITOR
DATE
20/02/08
22/05/08
DRAWING No:
SIL/16/0343
DESCRIPTION:
AMC30 Power Amp
DRAWN BY:
DATE: 2009-5-5
5
6
7
SHEET 1
8
of 1
1
2
3
4
5
6
7
100R
8
R46
R47
100R
R7
180k
VCC
A
A
C3
10pF
R23
10K
IC1A
LM833
C1
4u7
2
1
T5
C1815
TAPE OUT
4
3
R1
4k7
C8
VR1
50k
33n
1/2VCC
R24
10K
C19
47/25V
C13
100P
R41
2K2
R18
10k
1/2VCC
C7
4u7
R10
10k
R12
10k
VR4
50k
VCC
CN1
6
GND 1/2VCC
VCC
OUT+
7
IN+
5
C4
IC3B
LM833
C9
1200P
4.7u
R11
6k8
R6
VR5
50k
VR2
50k
T1
C1815
C10
47PF
VCC
PRIORITY
6
1
2
3
2k2
R2
2k2
1
2
3
4
5
6
7
VCC
VCC
T4
C15
47pf
T3
C1815
R30
6
5
2k2
VCC
R36
T6
C1815
10K
VR6
50k
R15
4k7
IC3A
LM833
2
1
4k7
3
T2
C1815
R40
10k
1/2VCC
VCC
C20
470/25
R26
6k8
R29
100E
2
TH+
1
TO AMP
3
10K
C16
47/25
C
R28
22K
IC4A
LM358
D3
3.9v
R21
R22
100K
IC4B
LM358
VR7
50k
C11
4u7
R33
3.9v
D1
BAV21
R9
2k2
10/25
D2
7
4.7U
R39
2k2
R4
100k
VCC
R19
4k7
C14
R14
BC556
2K2
R20
1M
C
4u7
R16
12K
R38
10k
8
2k2
10k
C17
D6
BAV21
VR3
50k
C12
100p
C2
R5
7
IC1B
LM833
1/2VCC
R3
2k2
B
1/2VCC
Tone Module Input
5
R8
OUT-
Signal
4
TAPE OUT
R13
6k8
IN-
VCC
X2
4
+12V
CH1
CH2
CH3
CH4
Line OUT+
Line OUT-
8
B
1
2
3
4
5
6
7
8
9
10
Signal
8
R17
10k
R34
10k
R27
220E
R37
10k
1K
TH-
R25
TO AMP
10K
CN2
D
1
2
3
4
5
6
IN+
INTHTH+
R32
R31
1K5
VCC
D
220E/2W
C21
1000/25
CN3
LED1
G Changed gain R16 22k->12k, C12 220p->100p, R19 1k->4k7
REV
REVISION NOTE:
A
B
C
D
E
F Changed to 4 channels
D4
12V1W
1
2
3
4
5
CKW
DRN
CKW
6
22/05/08
DATE
15/02/08
AUSTRALIAN MONITOR
DRAWING No:
SIL/16/0345
DESCRIPTION:
AMC Mixer
DRAWN BY:
DATE: 2009-5-5
7
SHEET 1
8
of 1
1
2
3
4
5
6
+M
D6
C3
47uF/25
T1
A1145
2A S/B
1N4007
D2
1N4148
R3
150E
A
F?
R13
100E
C7
A
100/35
D3
1N4148
R12
R19
T6
A1145
2K2
470E
R10
6K8
R14
2K2
T11
C3421
T13
TIP35
D8
1N4007
D4
1N4007
R15
100E
R21
T9
C1815
R11
6K8
R4
100E
T7
BD139
R5
100E
C1
CN1
B
1
2
3
220n
R1
T2
A1145
5k6
R2
18k
R23
390E
PR1
2K
15PF
T10
A1015
C16
220PF/50V
T5
C1815
R26
68E
R28
0.22E/5W
C4
R31
10E/2W
COM
B
PRIM
100V
47E
C11
0.1uF/100V
C10
0.1uF/100V
D5
1N4007
70V
T12
A1358
470E
T14
TIP36
C17
470u/50V
D9
COM
1N4007
T8
C2705
R7
68E
R29
10E/2W
R24
R17
82E
R20
R6
68E
4E
1mm/13T
10E/1W
330E
R32 R9
330E
T4
C1815
L1
R30
C5
C2
180p
R27
0.22E/5W
C9
47/25
R8
18k
T3
A1145
R25
68E
C6
47/25
R16
1K2
+M
47E
R22
47E+150E
D1
R18
0E
100/35 1N4007
-M
D7
1N4007
F?
2A S/B
C
C
C8
100/35
230V T0.5A 115V T1A
230V/115VAC
F1
F2
125C
+M
T1
21.5V
D10
1N5402
D11
1N5402
C14
2200uF/35V
S1
GND
D12
1N5402
SW-DPDT
D13
1N5402
C15
2200uF/35V
-M
21.5V
TRANS1
D
D
Title
Size
Number
Revision
B
Date:
File:
1
2
3
4
5
4/23/2012
\\..\AMC+30 (1).SCH
Sheet of
Drawn By:
6
T7
T14
R26
R20
R28
T12 D9 R24
J10
R25
R16 R14 R15 R19
R21 D8
T11
C6
C9
R17
T13
CN2
J9
D10
R27
D11
D3 D2
T9
F1
D6
C11
R29 J7
C8
C10
R1 C2 R2 R7 R6
C14
R3
R5
T3
T4
C3
C5
J8
T2
J2
R22
C7
J6
J3
A59
T1
R8
C1
J
T5
CN1
R9
R4
AMC+30 AMP-C
C4
R32
R30
F2
D7
J5
T10
D12
D13
R12
C16 R11R10
J4
R23
D4
T6
CT P/S TXFR
D5
R13
O/PTXFR 2
R18 PR1T8
D1
R31
O/PTXFR 1
C15
N/P
C17
J12
GND
R1
1/2 VCC
R6
VCC
CH1
R8
CH2
CH3
R14
T6
J18
T1
OUT-
TAPE OUT
CN1
R30
R19
C1
T3
D2 R21
C16
EN
OFF
PRIORITY
R46
C15
R3
R37
R36
IC4
J6
R25
J1
R28
SIGR27
R9
R26
SIG+
VR3
TH+
C21
GND
D4
X2
J9
R31
CN2
J10
+VCC
T4
NC
R38
R39
MUTE
VR7
GND
R40
TONE OUT
C4
R32
J13
C20
C19
C2
R7
J10
C3
J15
2K2
C7
VR4
R41
C10
IC1
C8
R47
R4
R22
D1 R20 D6
VR2
J17
J16
0R
J19
R2
R23
VR1
T5
OUT+
C14
J7
J7
GND
+M
+VCC
R5
J14
J8
R12
VR5
D3
R34
R10
J2
C9
R13
R29
R11
R16
R17
C12
R15
T2
C11
R33
J5
VR6
IC3
J3
C13
J4
J3
K
A
R18 CN3
C17
R24
R5
R6
C2
C10
IC1
C11
R19
C12
R7
R9
C4
TAPE OUT
R10
+
C14
R11
R14
R15
C17
R32 R33
R16
RCA2
C5
+
C18
R17
R18
C19
C6
J4
IC2
C20
J3
XLR5
R21
C31
R23
C30
C26
R26
C29
R27
+
C27
R24
RCA3
R25
C28
+
XLR3
R13
C16
R12
C15
R20
+
XLR2
R8
C3
C13
+
C25
R35 R34
R21 R22
+
+
C1
C9
+
J1
J2
+
AMC+ input-E
+
R28 R29
+
+
C24
+
R4
CN1
+
R3
+
A59
XLR1
R2
C8
C23
+
+VE
CH1
CH2
CH3
CH4
OUTOUT+
R1
C7
+
R31 R30
+
GND
+
1/2 VCC
C21
C22
XLR4
C32
Phantom Power
S1
J6
J5
TEST PROCEDURE MODEL – AMC+30
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,
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.
2. Set up amplifier for test (Pretesting stage).
2.1. Check
• AC fuses (0.5A), 20mm HRC
• DC fuses (1.6A QA), 20mm
2.2. Connect amplifier to:
• Variac (0Vac),
• Signal generator (mic1, no signal),
• Resistive load ( 4Ω on 4Ω terminal ).
2.3. Reset controls:
• Volume controls to minimum,
• Bass/treble control to center,
• PR1 (presets) Amplifier PCB fully anticlockwise.
3. Power up
3.1 Turn on power switch and adjust voltage to 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. +22V (±1.5V)
3.4 Check DC voltage on mixer board. Should be approx. 12V(±0.5V)
3.5 Check 1/2 VCC on mixer board should be 5.4 VDC (± 0.5)
3.6 Measure DC voltages on IC of mixer & input PCB's, p8 12V (+5%), p4 0V (+100mV), p1 5.4V
(± 5%).
3.7 Put a multimeter across R27 the meter read 0mV then slowly adjust the preset PR1 so that you get
2.5mV Check Quiescent Vtg across all Emitter resistors.
4. 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 7V using master volume control. Check voltage across Emitter resistors (on power
devices)
1
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. set sensitivity of mike input to 1mV.
4.5 Check the output of all channels should be 11V (± 0.1V).
4.6 Check 100V(±5V) at 100V terminal .
4.7 Check tape outputs (L and R) 250mV (+25mV) (Measure on RCA socket).
4.8 Check line outputs. Approx. (1.2V ± 0.12V).
4.9 Check Tone Module.
FINAL TESTING
Requirements for final testing
a.
b.
c.
d.
e.
5
Performance Test.
5.1
5.2
5.3
5.4
5.5
5.6
6
Neutric.
Load 330Ω.
Oscilloscope
Microphone
Variac
Check Noise should be less then 10mV (all pot mid) i.e. S/N >80dBr
Check mike sensitivity (CH1-CH3) = 1mV out put =100V (± 5V)
Check AUX sensitivity (CH1-CH3)= 5000mV out put =100V (± 5V)
Check the Power bandwidth – (68Hz ±5Hz – 15KHz ± 2KHz).
Check Bass control @ 100HZ = +12dB (TOL +1dB) and treble @ 10kHz = + 9.5dB (tol.±1dB)
Check that input signal and output signal are in same phase by comparing CH 1 AUX Input and all
other Outputs (4Ω , 100V )
Priority check
6.1 Plug microphone into input 1 and oscillator to input 3. Check for muting of channel 3.
6.2 Make Disable/Enable link to disable position Check that CH1 does not mute CH3.Return
Disable/Enable link to Enable position
7 Over load Test
7.1 Make Output Load 150E Increase the signal till you get 1% the output VTG should be 57V +- 4V.
7.2 Keeping the signal ON, short the output for one Sec and remove, the output should drop and return back
without any distortion or damage to any components. Make the output loads normal to 330E.
7.3 Reset volumes to minimum.
7.4 Disconnect from test bench and inspect for scratches on external paint.
8
Factory setting of links:
a.
b.
VOX Muting: Enable
All pot Center
LISTENING TEST
10 Insulation test and High voltage test to be carried out as per UL Standard Procedure.
Requirements for Listening Test Setup :
a.
b.
CD Player
Speaker
2
c.
Microphone
11 Listening test
11.1 Keep all pot full tone at center, switch ON the set and check for ON thump and also check that no low
frequencies are audible.
Make all Channel Pots minimum.
11.2 Check CD Player (AUX) output for all channels and tone control for all channels.
11.3 Check Priority function: CH 1 over CH2 & 3
11.4 Short the output with signal ON Signal should mute and return back
3
AMC+ Parts
Circuit boards
Part Number
Factory code
Input board
Mixer board
AMC+30 output board
AMC+60 output board
AMC120+ mixer board
AMC+120 output board
AMC+250 output board
AMC+IB
AMC+120MB
AMC+30OPB
AMC+60OPB
AMC+120MB
AMC+120OPB
AMC+250OPB
B06044
B03048
B06047
B06044
B012046
BR025001
AMC+30TX
AMC+30OT
AMC+60TX
AMC+60OT
AMC+120PTX
BR0120036
AMC+120OT
AMC+250TX
AMC+250OT
BR0120036
BR030123
BR030124
BD6041
BD060127
BD0642
BR0120036
BR0120125
BR0250140
BR0250141
BR0120036
Transformers
AMC+30 mains transformer
AMC+30 output transformer
AMC+60 mains transformer
AMC+60 output transformer
AMC+120 mains transformer
AMC+120 drive transformer
AMC+120 output transformer
AMC+250 mains transformer
AMC+250 output transformer
AMC+250 drive transformer
Australian Monitor Service Bulletin
AMC+ Mixer and Booster Amplifiers
Mains Fuses
20 February 2012
Applicable Models
This bulletin applies to AMC+30, AMC+60, AMC+120 and AMC+250 Mixer Amplifiers and the AMC+120P,
AMC+1202P and AMC+250P Booster Amplifiers manufactured prior to 2012.
Known Issue
The AMC+ range of mixer amplifiers and AMC+ booster amplifier have experienced a higher than acceptable
incidences of mains fuse failures at turn on.
Details
AMC+ products manufactured prior to 2012 are fitted with inferior Chinese fuses.
Solution
The problem can easily be rectified by placing the existing mains fuse with name brand quality fuses available
from Element14 as follows:
115V Operation
(North America)
Model
230V Operation
(Australia/Europe)
Fuse Rating
Element14
Fuse Rating
Element 14
AMC+30
T1A
1123115
T500mA
1123121
AMC+60
T3.15A
1123119
T1.6A
1123113
T4A
1123120
T2A
1123118
T8A
1123125
T4A
1123120
AMC+120
AMC+120P
AMC+250
AMC+250P
AMC+1202P
All fuses are Cooper Bussman 250VAC rated, slow-blow ceramic HRC type M205 cartridge.
All future production models will be fitted with these fuses.
Procedure
1.
Remove the mains lead from the amplifier.
2.
Remove the fuse holder drawer that is part of the IEC mains input socket.
3.
Remove the two existing fuses (one of these is a spare fuse).
4.
Install two M205 size fuses as per the operating voltage above.
5. Reinstall the drawer.
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