Efx Signal Flow - Mackie 406M Service Manual
Ppm series
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Also See for 406M:
- Specifications (6 pages) ,
- Hook-up manual (7 pages) ,
- Owner's manual (36 pages)
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EFX signal flow
BLOCK DIAGRAMS
EFX SEND
TIME/RATE
EFX
LEVEL
EMAC
Off to +12dB
DSP
DAMPING/DEPTH
EFX WIDE
EFX BYPASS
Stereo mixers
FRONT PANEL CONTROLS AND ADJUSTMENTS
NOTE: the following schematic pieces are all from the stereo mixer circuit board chapter 194, page 9, and
show what happens before and after the EFX board. See also EFX circuit board chapter 192.
Pot = R429
LED= D10
Pot = R433
16
EFX CLIP EFX RETURN L
EFX
TO MAIN
Off to +10dB
EFX RETURN R
EFX
FOOT
SWITCH
EFX
TO MONITOR
Off to +10dB
SW= SW5
LED= D11
SW= SW6
Rotary
Encoder = S1
Pot = R463
The adjustment of these two pots directly affects the CODEC IC U3.
Note that Parameter 1 = POT 1, Parameter 2 = POT 2 at connector J1.
EFX SEND
EFX CLIP
TIME/RATE
EFX
LEVEL
EMAC
Off to +12dB
DSP
DAMPING/DEPTH
EFX WIDE
EFX BYPASS
Mono mixers
EFX CONTROLS (ON THE MIXER BOARD)
Rotation of the encoder S1 will
vary the level of BIT 0 through
to BIT 3. This will select which
DSP algorithm is in effect on
the DSP IC U2.
The state of BANK also affects
DSP IC U2.
EFX RET L
EFX
TO MAIN
Off to +10dB
EFX RETURN
EFX RET R
EFX
FOOT
SWITCH
EFX
TO MONITOR
Off to +10dB
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