Connectors; Efx Board - Mackie 406M Service Manual

Connectors

MIXER TO EFX BOARD
The details for the mixer to EFX board connector are shown on the previous page.
MIXER TO AMPLIFIER BOARD
J35
On the 206 mixer
circuit board,
this is J31
AMPLIFIER BOARD CONNECTIONS
The power transformer secondary wires connect directly to the amplifier boards, using J14
for the 193 circuit board, and J10 for the 204 circuit board. The AC voltages are rectified
and the resulting DC voltages supply the amplifier DC rails and the mixer circuit board.
GREY 70VAC
GREY 70VAC
ORG/RED, C.T. OF ORG WIRES
ORG, 16VAC
ORG, 16VAC
VIOLET, N.O.
GREEN, 9VAC
Single spade connections on the amp boards are used to send the speaker-level outputs
to the output board 224, and there is a ground connector to the mixer board.
The connection between the mixer and amplifier boards is the
same for all models of powered mixers.
12 LEFT COMP
11 RIGHT COMP
10
9 LEFT AMP
8 LEFT AMP GND
7 RIGHT AMP GND
6 RIGHT AMP
5
4 +5V
3 -16V
2
1 +16V
J14
BROWN, 64VAC
BROWN, 64VAC
RED/YEL, C.T. MAIN
RED/YEL, C.T. MAIN
RED, 32 VAC
RED, 32VAC
GREEN, 9VAC
193 amplfier board
These are samples of the amplifier output,
used to drive the compression circuit on the
mixer board.
These are the line level signals coming out
of the mixer into the amplifier.
The power supplies and grounds come from
the amplifier circuit board.
Note: there is a separate ground wire which
connects the bottom of each mixer circuit
board to the amplfier circuit board.
NC
BRN/YEL, C.T. OF BRN
BRN, 16VAC
BRN, 16VAC
VIO, N.O.
GREY, 9VAC
J10
ORG
RED
RED/YEL, C.T. MAIN
RED
ORG
GREY, 9VAC
204 amplfier board
19