Mackie M1400/M1400i BLOCK DIAGRAM M•1400/ M•1400i

BLOCK DIAGRAM M•1400/ M•1400i

OL –3 –6

–9

–20

SIG

CH1

SPEAKER OUT

OL –3 –6

–9

–20

SIG

CH2

SPEAKER

OUT

METER

DRIVE

METER

DRIVE

TOHUSKY STADIUM

CH1

SIG

CH2 SIG

CH1 SHORT LED

SHORT

DETECT

DCOFFSET

DETECT

CH2 SHORT

LED

SHORT

DETECT

DCOFFSET

DETECT

FAN

TOCH1

MUTE

FUSE

POWER

AMPLIFIER

FUSE

TOCH2

MUTE

FUSE

POWER

AMPLIFIER

FUSE

FAN

SPEED

CONTROL

+80VDC

–80VDC

+80VDC

–80VDC

OR

CH1

PROTECT

LED

MUTE

CH1 MUTE

CH2

PROTECT

LED

MUTE

CH2

MUTE

AND

LIMITER

LIMITER

60ºC DETECTOR

1CH GAIN

INVERTING

GAINUNITY AMPLIFIER

AMP

MODE

SWITCH

MONO

2CH GAIN

OUT

OUT

STEREO

NC

CH1AMP

CH2AMP

BRIDGE

OUTPUT

APPLICATION

ON SWITCH

OFF

SUB

TO

LIMITER

NC

NC

ON

OFF

SUB

FREQ

63Hz

125Hz

LOWPASS

FILTER

(SUBWOOFER)

PD'sLEASH

SIG (TOCH1

METERDRIVE)

SIG

(TOCH2

METERDRIVE)

TOROIDALPOWER

TRANSFORMER

FREQ

CDEQ

ON

OFF

FREQ

CDEQ

ON

OFF

POWER

SWITCH

FREQ

LOWCUT

FILTER

FREQ

LOWCUT

FILTER

FUSE

CH1 BALANCED LINEINPUT (XLR-F) THRU (XLR-M) CH1 BALANCED LINEINPUT (TRS) CH2 BALANCED LINEINPUT (XLR-F) THRU (XLR-M) CH2 BALANCED LINEINPUT (TRS)

HIDCV		LODCV						TOCH2		MUTE
		TOCH1	MUTE
				CONTROL	4SECDELAY	(TURN-ON)			MUTE CONTROL
PROGRAM DETECT		CH1	MUTE				CH2
		FROMCH1 SHORTDETECT								FROMCH2 SHORTDETECT
				MUTE	UNMUTE
		HOT	LED	80ºC	55ºC		COLD		LED
+ 90VDC	–				TEMP	SENSOR	(ONHEATSINK)

+ 80 VDC –

	THERMAL	PROTECT
LAMP	TOCH1 ANDCH2	MUTE

MACKIE DESIGNS M•1400 BLOCK DIAGRAM (#022598DF)

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