26
M-Series
M-Series
M-Series Block Diagram
CH 1
BALANCED
LINE INPUT
(TRS)
CH 1
BALANCED
LINE INPUT
(XLR-F)
LIMITER
ON
OFF
HIGH PASS
FILTER
+
–
VDC
++
– –
VDC
+++
– – –
VDC
(M•3000/M•4000
ONLY)
TOROIDAL POWER
TRANSFORMER
MILLENIUM SPACE STATION
LAMP
MACKIE
M•2000/M•3000/M•4000
BLOCK DIAGRAM
(#022106DF)
AMP
MODE
SWITCH
LOW PASS
FILTER
CH 1
GAIN
STEREO
MONO
BRIDGE
CH 2
GAIN
INVERTING
UNITY GAIN
AMPLIFIER
150Hz
X-OVER
HPF
LPF
FULL
NC
POWER
AMPLIFIER
VOLTAGE
AMPLIFIER
CLASS-H
SWITCHING
CONTROL
METER
DRIVE
OL
–3
–6
–9
–20
SIG
CH 1
SIG
+V
SIG
(TO CH 1
METER DRIVE)
TEMP
SENSOR
(ON HEATSINK)
CH 2
AMP OUT
PROGRAM
DETECT
AND
OR
HI FAN SPEED
DETECTOR
65ºC TRIP
LO FAN SPEED
DETECTOR
50ºC TRIP
FAN
SPEED
CONTROL
HI DCV
LO DCV
OFF
BREAKER
AC IN-RUSH
LIMITER
POWER
SWITCH
TRANSFORMER
OVERTEMP
(TO CH 1/CH 2
PROTECTION)
THERMAL
PROTECT
UNDER-VOLT
(TO CH1/CH2
PROTECTION)
SUPPLY
UNDERVOLTAGE
DETECTOR
(65% OF NOMINAL)
THRU
(XLR-M)
CH 1
SCREW
TERMINAL
LINE INPUT
+
–
GND
FAN
2
3
1
2
3
1
CH 2
BALANCED
LINE INPUT
(TRS)
CH 2
BALANCED
LINE INPUT
(XLR-F)
THRU
(XLR-M)
CH 2
SCREW
TERMINAL
LINE INPUT
+
–
GND
2
3
1
2
3
1
SIG
(TO CH 2
METER DRIVE)
(TO CH 2
PROTECTION)
LIMITER
ON
OFF
HIGH PASS
FILTER
LOW PASS
FILTER
150Hz
X-OVER
HPF
LPF
FULL
++V
+++V (M•3000/M•4000 ONLY)
–V
– –V
– – –V (M•3000/M•4000 ONLY)
VOLTAGE
AMPLIFIER
POWER
AMPLIFIER
CLASS-H
SWITCHING
CONTROL
METER
DRIVE
OL
–3
–6
–9
–20
SIG
TEMP
SENSOR
(ON HEATSINK)
CH 1
AMP OUT
PROGRAM
DETECT
AND
OR
HI FAN SPEED
DETECTOR
65ºC TRIP
LO FAN SPEED
DETECTOR
50ºC TRIP
FAN
SPEED
CONTROL
HI DCV
LO DCV
OFF
FAN
(TO CH 1
PROTECTION)
CH 2
SIG
+V
PROTECTION
SHORT
OVER TEMP
SHORT
PROTECT
DC FAULT
X-FORMER OVERTEMP
HEATSINK OVERTEMP
OVER-VOLT
PROTECTION
SHORT
OVER TEMP
SHORT
PROTECT
DC FAULT
X-FORMER OVERTEMP
HEATSINK OVERTEMP
OVER-VOLT
++V
+++V (M•3000/M•4000 ONLY)
–V
– –V
– – –V (M•3000/M•4000 ONLY)
1+
1–
2–
2+
1+
1–
2–
2+
CHANNEL 1
SPEAKER
OUT
BRIDGED
SPEAKER
OUT
1+
1–
2–
2+ CHANNEL 2
SPEAKER
OUT
+
–
+
–
+
–
+
–
+
–