Mackie M2600 - Block Diagram

4
+
–
+
–
CH.1 100 VDC
+
–
CH.1 115 VDC
+
–
CH.2 115 VDC
TOROIDAL POWER
TRANSFORMER
LAMP
FUSE
MACKIE DESIGNS M•2600 BLOCK DIAGRAM 9/21/1998
LOW CUT
FILTER
CROSSOVER
INVERTER
(FOR BRIDGED MONO
OPERATION)
FREQ
CH.1 GAIN
CH.2 GAIN
60-90-120Hz
THRU–LOW–HIGH
LIMIT–OFF-LOW OUT
POWER
SWITCH
IN-RUSH
LIMIT
30 VDC
+15 VDC -15 VDC
22 VAC
+
–
CH.2 100 VDC
TRANSFORMER
THERMAL
LINE INPUT
(1/4" TRS)
LINE INPUT
(XLR-FEMALE)
THRU OUTPUT
(XLR-MALE)
STEREO-MONO-BRIDGED
STEREO-MONO-BRIDGED STEREO-MONO-BRIDGED
LIMITER CONTROL
CH–1 CH–2
LOW
HIGH
LOW CUT
FILTER
CROSSOVER
FREQ
SHORT 2
IN-RUSH CONTROL
THRU–LOW–HIGH
LIMIT–OFF-LOW OUT LIMIT–OFF-LOW OUT
LINE INPUT
(1/4" TRS)
LINE INPUT
(XLR-FEMALE)
THRU OUTPUT
(XLR-MALE)
60-90-120Hz
LOW
HIGH
SHORT 1
(THE SHORT LEDS ARE JOINED IN BRIDGED MODE)
LIMITER
CHANNEL 1
POWER
AMPLIFIER
FUSE
OUTPUT
RELAY
–100VDC
–115VDC
22VAC
FUSE
+100VDC
+15VDC +15VDC
+115VDC
METER
DRIVE
OL
–3
–6
–9
–20
SIG
PROTECT SHORT
SHORT 1
CH 1
SIG
CH 1
SIG
CH 2
SIG
CH. 1
SPEAKER
OUT
CH. 2
SPEAKER
OUT
CH. 1
SPEAKON
CH. 2
SPEAKON
BRIDGED
MONO
SPEAKON
PROTECTION CIRCUITRY
MUTE
DC OFFSET
PROTECT
SHORT
OUTPUT STAGE CURRENT OUTPUT STAGE VOLTAGE
TRANSIENT SOA FLT
STEADY STATE SOA FLT
OUTPUT DISSIPATION
LOW VOLTAGE DETECT
IN-RUSH CONTROL
CH.1 DISSIPATION
MUTE
LIMITER
CHANNEL 2
POWER
AMPLIFIER
FUSE
OUTPUT
RELAY
–100VDC
–115VDC
22VAC
FUSE
+100VDC
+15VDC +15VDC
+115VDC
METER
DRIVE
OL
–3
–6
–9
–20
SIG
PROTECT SHORT
CH 2
SIG
PROTECTION CIRCUITRY
MUTE
DC OFFSET
PROTECT
SHORT
OUTPUT STAGE CURRENT OUTPUT STAGE VOLTAGE
TRANSIENT SOA FLT
STEADY STATE SOA FLT
OUTPUT DISSIPATION
LOW VOLTAGE DETECT
IN-RUSH CONTROL
CH.2 DISSIPATION
MUTE
+30VDC
-30VDC
HOT LED
COLD LED
CH.1 MUTE CH.2 MUTE
80
0
C MUTE
52
0
C UN-MUTE
80
0
C MUTE
52
0
C UN-MUTE
CH 1
TEMP
SENSOR
CH 2
TEMP
SENSOR
OVER TEMPERATURE
DETECTOR
TRANSFORMER
THERMAL SWITCH
VARIABLE SPEED FAN CONTROLLER
45
0
C – 65
0
C SPEED CONTROL CH.1
45
0
C – 65
0
C SPEED CONTROL CH.2
FAN IDLE/VARIABLE CH.1 POWER DETECTOR FAN IDLE/VARIABLE CH.2 POWER DETECTOR
CH.1 DISSIPATION
CH.2 DISSIPATION
FAN
Σ
1-
1+
1-
1+
-
+
-
+
1-
1+
SHORT 2
(THE CHANNELS ARE SUMMED IN MONO OR BRIDGED MODE)
Block diagram