Mackie CFX12, CFX16, CFX20 Schematic

CFX series

Page 3 is interactive

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Compact Effects Mixers:
CFX•12, CFX•16 and CFX•20

MAIN OUT

MAIN INSERT

MIC

3

MIC

MIC

2

MIC

1

BAL/UNBAL

BAL/UNBAL

LINE IN

LINE IN

INSERT

INSERT

1

2

U

U

G

G

A

A

C

C

I

I

I

I

N

N

M

M

ZERO

ZERO

6

6

+50

+50

LEVEL

LEVEL

-15dB+30dB

-15dB+30dB

TRIM

TRIM

LOW CUT

LOW CUT

100 Hz

100 Hz

AUX

AUX

U

U

1

1

+15

+15

OO

OO

U

U

2

2

+15

+15

OO

OO

PRE FADER

PRE FADER

U

U

EFX

EFX

1

1

(EXT)

(EXT)

+15

+15

OO

OO

U

U

EFX

EFX

2

2

(INT)

(INT)

+15

+15

OO

OO

EQ

EQ

U

U

HI

HI

12k

12k

-15

-15

+15

+15

U

U

MID

MID

-15

-15

+15

+15

600

600

FREQ

FREQ

1.5k150

1.5k150

8k100

8k100

U

U

LOW

LOW

80Hz

80Hz

-15

-15

+15

+15

PANLRPANLRPANLRPANLRPANLRPANLRPANLRPANLRPANLRPAN

LR

1

2

ASSIGN

ASSIGN

MUTE

MUTE

dB

dB

10

10

-

2

-

1

1

5

5

3-4

3-4

U

U

5

5

10

10

20

20

30

30

40

40

SOLO

SOLO

50

50

PFL

PFL

60

60

OO

OO

4

MIC

BAL/UNBAL

BAL/UNBAL

BAL/UNBAL

LINE IN

LINE IN

INSERT

INSERT

3

4

U

G

A

C

I

M

6

+50

-15dB+30dB

TRIM

LOW CUT

100 Hz

U

+15

OO

U

+15

OO

PRE FADER

U

+15

OO

U

+15

OO

U

-15

+15

U

-15

+15

600

U

-15

+15

3

ASSIGN

dB
10

2

5

U

5

10

20

30

40
50
60

OO

U

U

G

G

A

A

C

C

I

I

I

I

N

N

M

M

ZERO

ZERO

6

6

+50

+50

LEVEL

LEVEL

-15dB+30dB

-15dB+30dB

TRIM

TRIM

LOW CUT

LOW CUT

100 Hz

100 Hz

AUX

AUX

U

U

1

1

+15

+15

OO

OO

U

U

2

2

+15

+15

OO

OO

PRE FADER

PRE FADER

U

U

EFX

EFX

1

1

(EXT)

(EXT)

+15

+15

OO

OO

U

U

EFX

EFX

2

2

(INT)

(INT)

+15

+15

OO

OO

EQ

EQ

U

U

HI

HI

12k

12k

-15

-15

+15

+15

U

U

MID

MID

-15

-15

+15

+15

600

600

FREQ

FREQ

1.5k150

1.5k150

8k100

8k100

U

U

LOW

LOW

80Hz

80Hz

-15

-15

+15

+15

4

5

ASSIGN

ASSIGN

MUTE

MUTE

dB

dB

10

10

-

2

-

2

1

1

5

5

3-4

3-4

U

U

5

5

10

10

20

20

30

30

40

40

SOLO

SOLO

50

50

PFL

PFL

60

60

OO

OO

MIC

7

MIC

5

MIC

6

BAL/UNBAL

LINE IN

LINE IN

INSERT

INSERT

5

6

U

G

A

C

I

I

I

N

N

M

ZERO

ZERO

6

+50

LEVEL

LEVEL

-15dB+30dB

TRIM

LOW CUT

100 Hz

AUX

AUX

U

1

1

+15

OO

U

2

2

+15

OO

PRE FADER

U

EFX

EFX

1

1

(EXT)

(EXT)

+15

OO

U

EFX

EFX

2

2

(INT)

(INT)

+15

OO

EQ

EQ

U

HI

HI

12k

12k

-15

+15

U

MID

MID

-15

+15

600

FREQ

FREQ

1.5k150

1.5k150

8k100

8k100

U

LOW

LOW

80Hz

80Hz

-15

+15

6

ASSIGN

MUTE

MUTE

dB
10

-

2

-

1

1

5

3-4

3-4

U

5

10

20

30

40

SOLO

SOLO

50

PFL

PFL

60

OO

8

LR

BAL/UNBAL

BAL/UNBAL

LINE IN

LINE IN

INSERT

INSERT

7

8

U

U

G

G

A

A

C

C

I

I

I

I

N

N

M

M

ZERO

ZERO

6

6

+50

+50

LEVEL

LEVEL

-15dB+30dB

-15dB+30dB

TRIM

TRIM

LOW CUT

LOW CUT

100 Hz

100 Hz

AUX

AUX

U

U

1

1

+15

+15

OO

OO

U

U

2

2

+15

+15

OO

OO

PRE FADER

PRE FADER

U

U

EFX

EFX

1

1

(EXT)

(EXT)

+15

+15

OO

OO

U

U

EFX

EFX

2

2

(INT)

(INT)

+15

+15

OO

OO

EQ

EQ

U

U

HI

HI

12k

12k

-15

-15

+15

+15

U

U

MID

MID

-15

-15

+15

+15

600

600

FREQ

FREQ

1.5k150

1.5k150

8k100

8k100

U

U

LOW

LOW

80Hz

80Hz

-15

-15

+15

+15

7

8

ASSIGN

ASSIGN

MUTE

MUTE

dB

dB

10

2

5

U

5

10

20

30

40
50
60

OO

dB

10

10

-

2

-

2

1

1

5

5

3-4

3-4

U

U

5

5

10

10

20

20

30

30

40

40

SOLO

SOLO

50

50

PFL

PFL

60

60

OO

PRE FADER

9-10

ASSIGN

OO

STEREO EFX

U

TRIM

U

OO

U

OO

U

OO

U

OO

U

-15
U

-15
U

-15
U

-15

+20-20

+15

+15

+15

+15

+15

+15

+15

+15

RETURN

1

2

(MONO) (MONO)

9

LEFT

RIGHT

10

9

10

AUX

1

2

EFX

1

(EXT)

EFX

2

(INT)

EQ

HI
12k

HI
MID
3k

LOW LOW

MID

400Hz

LOW
80Hz

MUTE

dB
10

-

2

1

5

3-4

U

5

10

20

30

40

SOLO

50

PFL

60

EFX SEND

11

LEFT

RIGHT

12

11

U

12

+20-20

TRIM

AUX

U

1

+15

OO

U

2

+15

OO

PRE FADER

U

EFX

1

(EXT)

+15

OO

U

EFX

2

(INT)

+15

OO

EQ

U

HI
12k

-15

+15

U

HI

MID

3k

-15

+15

U

MID

400Hz

-15

+15

U

LOW
80Hz

-15

+15

11- 12

ASSIGN ASSIGN

MUTE

-

2

1

3-4

SOLO

PFL

OO

TAPE
INPUT

1

L

RLR

2

MASTER SEND

U

+15

OO

U

+15

OO

U

+15

OO

DIGITAL STEREO EFFECTS PROCESSOR

CLIP

U

+15

OO

EFX

2

SEND

REVERSE

GATED

CATHEDRAL

LG.HALL

MD.HALL
LG.PLATE
MD.PLATE
SM.ROOM

NORMAL NORMAL

100 100

TIME

RATE

SUB

dB
10

5

U

5

10

20

30

40
50
60

OO

MAIN OUT

TAPE

OUTPUT

LL

R

R

123

1

L

R

AUX SENDUTILITY OUT

AUX

1

2

EFX

1

(EXT)

CUSTOM 32-BIT PRECISION

EFX 2 (INT) RETURN MASTERS

U

+15

OO

TO MAIN MIX

WIDE BYPASS

CHORUS/FLANGE/PHASER

SUB

1

ASSIGN

dB
10

LEFT

5

RIGHT

U

5

10

20

30

40
50
60

OO

4

2

SUB OUT

15
10
5
0
5
10
15

1K50025063 125 16K2K 4K 8K

STEREO GRAPHIC EQ

CFX12 MIXER

12 CHANNEL COMPACT INTEGRATED LIVE SOUND MIXER

U

U

+15

OO

+15

OO

OO

EFX 1 RETURN

1

AUX

2

AUX

EFFECTS TO MONITOR

DELAY 1
DELAY 2

OO

DELAY 3

TAPE LEVEL

DELAY 4
CHORUS

BREAK SWITCH

FLANGE

(MUTES ALL CHANNELS)

PHASER
SPRING

EFX

REVERBS

DELAYS

OO

PHONES LEVEL

DAMPING

OO

DEPTH

UTILITY OUT LEVEL

SUB

SUB

2

3

ASSIGN

ASSIGN

dB

dB

10

10

LEFT

LEFT

5

5

RIGHT

RIGHT

U

U

5

5

10

10

20

20

30

30

40

40

50

50

60

60

OO

OO

LAMP

12V 0.5A

L

EFX

R

FOOT

SWITCH

S

75Hz

SUB OUT

PHONES

15
10
5
0
5
10
15

PHANTOM POWER

48v

U

POWER STATUS

LEFT RIGHT

+20

CLIP

22

U

10
7
4

+20

2
0
2
4

ZERO
LEVEL

7

SET

10

MAX

20

U

30

0dB

=

0dBu

+10

RUDE SOLO

STEREO

4

MAIN MIX

dB
10

LEFT

5

RIGHT

U

5

10

20

30

40
50
60

OO

SERVICE MANUAL

1999,2000 MACKIE DESIGNS, INC.

820-218-00

SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY

EXPERIENCED REPAIR TECHNICIANS ONLY

2

CONTENTS

Click on any item to open that page

ALL BOARDS

Introduction.....................................................................3

Overview..........................................................................4

Block Diagram..................................................................5

Specifications...................................................................6

Safety test........................................................................9

Connectors.......................................................................10

Quick parts.......................................................................12

Parts...................................................................................A1

Fold-out Sections
Exploded Views

CFX•12.........................................................................B1

CFX•16.........................................................................C1

CFX•20.........................................................................D1

Schematics and PCB layouts

Effects board....................................................................192-1

Master board...................................................................241-1

Slave 4 board...................................................................242-1

Power supply board........................................................258-1

AC power supply.............................................................260-1

INTRODUCTION

SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY

EXPERIENCED REPAIR TECHNICIANS ONLY

This manual contains basic service information. It is essential that you have a copy of the
user’s manual as this contains the complete operating instructions.

SERVICE TECHNICAL ASSISTANCE

Mackie Designs, Service Technical Assistance, is available 8AM - 5PM PST, Monday through
Friday for Authorized Mackie Service Centers, at 1-800-258-6883. Feel free to call with any
questions and speak with a carefully-calibrated technician. If one is not available, leave
a detailed message and a qualified Mackoid will return your call asap.

DISCLAIMER

The information contained in this manual is proprietary to Mackie Designs, Inc. The entire
manual is protected under copyright and may not be reproduced by any means without
express written permission from Mackie Designs, Inc.

3

Overview

The CFX mixer series consists of 3 models: the CFX•12, CFX•16 and CFX•20. Each consists
of five circuit boards: Effects, Master, Slave, Power and AC Power.

The Master board is the main mixer circuit.
The Effects board is fitted on the back of the Master board. This is exactly the same as

used in the PPM Professional Powered Mixer series.
The Slave board connects to the left of the Master board and adds four channels. The

CFX•12 has one Slave board, the CFX•16 has two, and the CFX•20 has three. This is the
main difference between the three models.

The power board regulates the AC power to +/- 15VDC, +5VDC and +48VDC (phantom
power).

The AC power board holds the IEC connector, fuse holder, power switch and caps.
This table shows which boards are used in each mixer.
Note: Each schematic chapter is labeled with the number of the board it describes. For

example, chapter 241 contains schematics and pcb layouts for circuit board number
550-241-00, chapter 192 is for circuit board 550-192-00.

MODEL EFFECTS MASTER SLAVE POWER AC POWER
CFX•12 192 241 242 (QTY 1) 258 260
CFX•16 192 241 242 (QTY 2) 258 260
CFX•20 192 241 242 (QTY 3) 258 260

4

TAPE OUT

LEFT

1

2

BREAK

MAIN OUT

LEFT

3

8K 16K
4K
2K

500 1K
250

63 125

MAIN

LEVEL

OUT

SUBWOOFER

1

2

3

MAIN OUT

RIGHT

MAIN

LEVEL

1

2

3

UTILITY OUT LEFT

8K 16K
4K
2K

500 1K
250

63 125

BREAK

PFL

TAPE OUT

RIGHT

SIGNAL

TO PHONES

UTILITY OUT RIGHT

UTILITY

LEVEL

+5

VDC

SOLO

OFF

LPF

75 Hz

TAPE

LEVEL

SOLO

PHONES

221074202471020

PHONES LEVEL

PFL

METER

SIGNAL

TO LEFT

PFL

ON

EXIT

WOODINVILLE

BOTHELL MONROE

30

ON

OFF

SOLO

SOLO

SOLO CONTROL

(ACTIVE LOW)

MAIN

RIGHT

MAIN
LEFT

SUB 4
SUB 3
SUB 2
SUB 1

CONTROL
SOLO

SOLO

AUX 1
AUX 2

EFX 1
EFX 2

SUB 1 OUT

LEFT

ASSIGN

TAPE IN

EFX 2

RIGHT

RIGHT

SOLO

MAIN INSERT

ASSIGN

SUB 4 OUT

LIGHT

RUDE SOLO

LEFT

ASSIGN

RIGHT

ASSIGN

EFX RETURN 1

STEREO EFX

STEREO EFX

RETURN 1 LEFT

3-4

1-2

PAN

MAIN

MUTE

3K
MID HI
LO MID

80 800 12K

LEFT

TRIM

LINE IN

STEREO

3K
MID HI
LO MID

80 800 12K

CHANNELS

RIGHT

RETURN 1 RIGHT

AUX 1

AUX 2

EFX 1

EFX 2

PRE/POST

SOLO CONTROL

FROM EFX

TO MAIN MIX

STEREO EFX

RETURN 2 LEFT

EFX BYPASS

EFX LEVEL SET

EFX SEND 2

(ACTIVE LOW)

EFX SEND 1

TIME/RATE

AUX SEND 1

EFX TO AUX 2

TO RIGHT MAIN

EMAC

DAMPING/DEPTH

AUX SEND 2

R

DSP

EFX WIDE

AUX SEND 2

EFX SEND 1

EFX

FOOT

SWITCH

EFX BYPASS

TO LEFT MAIN

EFX TO MAIN MIX

+5

VDC

L

AUX SEND 1

EFX TO AUX 1

STEREO EFX

RETURN 2

RIGHT

EFX

SELECT

EFX SEND 2

MAIN INSERT

LEFT

ASSIGN

RIGHT

ASSIGN

SUB 2 OUT

1-2

PAN

SOLO

MUTE

MID FREQHI

W

O

P

M

O

T

N

A

H

P

L

A

B

O

L

G

+48 VDC

LO

SET

LEVEL

INSERT

LOW CUT

TRIM

PHANTOM POWER

2

1

TAPE IN

LEFT

LEFT

ASSIGN

RIGHT

ASSIGN

SUB 3 OUT

EFX 1

AUX 1

AUX 2

3-4

PRE-P0ST

FADER

80 12K

100 Hz

HPF

3

MIC/LINE IN

MONO CHANNELS

Block Diagram

5

Specifications

Frequency Response

Mic Input to any Output (Trim at
0 dB):

+0, –1 dB, 32Hz to 20kHz

Distortion THD and SMPTE
IMD; 20Hz to 20kHz

Mic Input to Main Output:

< 0.05% @ +4 dBu output

Noise
20Hz to 20kHz BandWidth

Ω Ω

(150

Ω source impedance)

Ω Ω

Equivalent Input Noise (EIN):

–127 dBu

Residual Output Noise:

Main, Monitor, & Effects out-

puts

Channel & Master levels off
–95 dBu

Common Mode Rejection
Ratio (CMRR)

60 dB @ 1kHz, Trim @ 0 dB

Crosstalk

Adjacent Inputs or Input to Out­put:

–90 dB @ 1kHz

Fader Off

–90 dB @ 1kHz
Mute Switch and Break Switch
Mute

–80 dB @ 1kHz

Input Level Trim Control
Range

+6 to –50 dB

Phantom Power

+48V DC

Equalization

Low Cut: 100Hz, –18 dB/octave
Mono Channel EQ:

High ±15 dB @ 12kHz
Mid ±15 dB @ 100Hz
Low ±15 dB @ 80Hz

Stereo Channel EQ:

High ±15 dB @ 12kHz
High Mid ±15 dB @ 3kHz
Low Mid ±15 dB @ 400Hz
Low ±15 dB @ 80Hz

Graphic EQ (9 bands):

Q = 1.414, ISO octave centers
±15 dB @ 63, 125, 250, 500, 1k,

2k, 4k, 8k, 16k Hz

Mixer Rated Output

Main, Sub, Aux, & Efx: +4 dBu
Max Rated Output: +20 dBu

Maximum Input Levels

Mic Input: –28 dBu, Trim @ +50 dB

+18 dBu, Trim @ +6 dB

Line Input: –8 dBu, Trim @ +30 dB

+38 dBu, Trim @ -15 dB
Insert Input, Stereo Line Input,
Tape Input, and
Effects Return: +20 dBu

Maximum Voltage Gain

Mic Input to

Insert Output: 50 dB
Tape Output: 66 dB
Sub Output: 66 dB
Main Output: 76 dB
Aux Send: 71 dB

Line Input to

Insert Output: 30 dB
Tape Output: 46 dB
Sub Output: 46 dB
Main Output: 56 dB
Aux Send: 51 dB

Stereo Line Input to

Tape Output: 40 dB
Sub Output: 40 dB
Main Output: 50 dB
Aux Send: 45 dB

Tape Input to

Main Output: 30 dB
Effects Return to
Main Output: 30 dB

Input Impedance

Mic Input: 3kΩ, bal
Line Input: 40kΩ, bal
Insert Input, Stereo Line Input,
Tape Input, and Effects Returns:

10kΩ, unbal

Output Impedance

Main Output, Insert Output, Tape
Output, Sub Output, and Effects
Sends: 150Ω

Digital Effects

Resolution: 16-bit, 2-channel
No. of Presets: 16

Channel Level Set LED
(Sensitivity)

0 dBu (normal operating level)

VU Meters

Main L/R
12 segments:
Clip, +10, +7, +4, +2, 0, –2, –4, –7,
–10, –20, –30

Disclaimer

Since we are always striving to
make our products better by incor­porating new and improved
materials, components, and manu­facturing methods, we reserve the
right to change these specifica­tions at any time without notice.

6

Effects board

BLOCK DIAGRAM

EFX SEND 2

EFX LEVEL SET

EFX BYPASS

STEREO EFX
RETURN 2 LEFT

EFX 2

EFX 1

AUX 2

AUX 1

EFX SEND 2

EFX
SELECT

TIME/RATE

DAMPING/DEPTH

EFX WIDE

EFX CONTROLS

DIGITAL STEREO EFFECTS PROCESSOR

CLIP

EFX 2 (INT) RETURN MASTERS

U

+5
VDC

L

STEREO EFX
RETURN 2
RIGHT

EMAC

DSP

CUSTOM 32-BIT PRECISION

U

EFX BYPASS

R

EFX
FOOT
SWITCH

U

U

EFX TO MAIN MIX

TO LEFT MAIN

EFX TO AUX 1

EFX TO AUX 2

TO RIGHT MAIN

This shows the signals present on
the EFX board connector J1.

J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7

J1

J1-8
J1-9
J1-10
J1-11
J1-12
J1-13
J1-14
J1-15

J1-16

FLAG IN
BANK
+5V
DGND
MONO IN
AGND
RIGHT OUT
LEFT OUT
POT1
POT2
CLIP_LED
N/C
BIT 0
BIT 1
BIT 2
BIT 3

+1 5

OO

EFX

2

SEND

REVERSE

GATED

CATHEDRAL

LG. HALL

MD.HALL

LG. PLATE
MD.PLATE
SM. ROOM

NORMAL NORMAL

100

TIME

RATE

+1 5

OO

TO MAIN MIX

EFX

WIDE BYPASS

REVERBS

DELAYS

CHORUS/FLANGE/PHASER

+1 5

OO

AUX

1

EFFECTS TO MONITOR

OO

AUX

DELAY 1
DELAY 2
DELAY 3
DELAY 4
CHORUS
FLANGE
PHASER
SPRING

DAMPING

DEPTH

+1 5

2

Adjustment of the rotary encoder S1 will vary the
level of BIT 0 through to BIT 3. This will select which
DSP algorithm is in effect on the EFX board’s DSP
IC U2.

The adjustment of these two pots directly affects
the CODEC IC U3. The levels are named POT 1 and

100

POT 2 at connector J1.
The state of the WIDE switch and the BYPASS

switch directly affect the DSP IC . The WIDE status
is named BANK. The BYPASS status is named FLAG.

7

The EFX board

The EFX circuit board schematics and pcb layouts are shown in chapter 192.
The circuit is made from the following main elements: Clock, CODEC, DSP and SRAM

CLOCK Y1

DSP IC U2

CODEC IC U3

SRAM U4, U5

INTEGRATED CIRCUITS

PART NO. DESCRIPTION VALUE REF

080-088-00 IC, ADSP-2163 U2
315-017-00 CRYSTAL, 24.576 MHZ 24.576 Y1
325-027-03 IC, SMD, DUAL D F/F 74HC74A U6
325-071-03 IC, HEX, INV, SMD 74HCU04 U1
329-042-03 IC, AD1819 QFP AD1819 U3
329-047-03 IC, 32KX8 SRAM 20nS 7C256-20 U4-5

FLAG IN
BANK
+5V
DGND
MONO IN
AGND
RIGHT OUT
LEFT OUT
POT1
POT2
CLIP_LED
N/C
BIT 0
BIT 1
BIT 2
BIT 3

Bypass switch
WIDE switch

Analog input

Analog outputs

Rotary
Encoder

EFX OVERVIEW

The CODEC receives a mono analog input from the mixer circuit board and converts it
into a digital signal. The CODEC also receives analog control signals from the two
Parameter pots, converts this to digital and sends a combined digital signal to the DSP.

The DSP and the two SRAM ICs, form a powerful DSP system. The DSP receives the digital
data from the CODEC as well as the direct control signals from the rotary encoder and
the EFX WIDE switch. The DSP programing selects and performs the appropriate DSP
function on the data, and sends it back to the CODEC.

The CODEC converts the incoming digital signals to two analog outputs which are sent
to the main left and right mix, and summed to the monitor mix. For Phaser and Delay
effects, the two analog outputs from the CODEC are mono. For other effects, there is a
difference between the signals.

8

Safety test

You must perform the following leakage test before returning the mixer to your customer.

Take every safety precaution to protect yourself while doing this test.

1. Make a small loading RC circuit as shown in the diagram below, and connect
the AC volt meter between the AC power source ground and any exposed metal
on the unit under test.

2. Connect the mixer under test to an AC power source using a ground-lift adaptor,
leaving the mixer’s safety ground floating. Turn the mixer on.

3. The meter reading should be less than 750mVAC (note: this is equivalent to 0.5mA
of leakage current).

4. Flip the plug over in the receptical so the hot and neutral are swapped.
Verify that the reading is still less then 750mVAC.

5. If either reading is greater than 750mVAC, then you must investigate and repair
the mixer before returning it to your customer.

9

Connectors

MIXER TO EFX BOARD

The details for the mixer
to EFX board
connector are shown
on page 8, but here it is
again.

MASTER CIRCUIT BOARD

J4

1
2
3 AUX_1+
4 AUX_1­5 AUX_2+
6 AUX_2­7 EFX_1+
8 EFX_1-

9 EFX_2+
10 EFX_2­11 +16V
12 -16V

13
14 +48V

J1

J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
J1-11
J1-12
J1-13
J1-14
J1-15
J1-16

This shows the signals present on
the EFX board connector J1.

FLAG IN
BANK
+5V
DGND
MONO IN
AGND
RIGHT OUT
LEFT OUT
POT1
POT2
CLIP_LED
N/C
BIT 0
BIT 1
BIT 2
BIT 3

J44

7 -16V, BLUE
6 SIG GND, BLACK
5 +16V, RED
4 +48V , YELLOW
3 LED GND, ORANGE
2 +5V, VIOLET
1 BROWN

Bypass switch
WIDE switch

Analog input

Analog outputs

Rotary
Encoder

10

J5

1 SUB_4+
2 SUB_4­3 SUB_2+
4 SUB_4­5 SUB_3+
6 SUB_3­7 SUB_1+
8 SUB_1-

9 CHAN_GND
10
11
12

13 SOLO-GND
14 SOLO-CTL

PFL+
CHAN_GND

SLAVE CIRCUIT BOARD CONNECTIONS

J4

J5

1
2
3 AUX_1+
4 AUX_1­5 AUX_2+
6 AUX_2­7 EFX_1+
8 EFX_1-

9 EFX_2+
10 EFX_2­11 +16V
12 -16V

13
14 +48V

1 SUB_4+
2 SUB_4­3 SUB_2+
4 SUB_4­5 SUB_3+
6 SUB_3­7 SUB_1+
8 SUB_1-

9 CHAN_GND
10
11
12

13 SOLO-GND
14 SOLO-CTL

PFL+

CHAN_GND

J15

J16

1
2
3 AUX_1+
4 AUX_1­5 AUX_2+
6 AUX_2­7 EFX_1+
8 EFX_1-

9 EFX_2+
10 EFX_2­11 +16V
12 -16V

13
14 +48V

1 SUB_4+
2 SUB_4­3 SUB_2+
4 SUB_4­5 SUB_3+
6 SUB_3­7 SUB_1+
8 SUB_1-

9 CHAN_GND
10
11
12

13 SOLO-GND
14 SOLO-CTL

PFL+

CHAN_GND

This shows the signals between
SLAVE boards.

This shows the signals into the
SLAVE board from the MASTER.
Actually, this is all rather sad,
that past generations fought in
the American Civil War to put a
stop to this sort of thing.
All circuit boards are created
equal.

11

Quick Parts

BAL/UNBAL

M

6

-15dB +30dB

TRIM

LOW CUT

100 Hz

OO

OO

PRE FADER

OO

OO

-15

-15

-15

ASSIGN

dB
10

5

U

5

10

20

30

40
50

60

OO

MIC

U

G

A

C

I

+50

U

+15

U

+15

U

+15

U

+15

U

+15

U

+15

600

U

+15

LR

1

1

XLR = 400-223-00

LINE IN

1/4" jack = 400-214-00

INSERT

1

I

N

Pot = 130-030-02, Knob = 760-048-01 (white)
LED =304-028-02 (yellow)

ZERO
LEVEL

Switch = 500-037-00, Button = 760-107-00

AUX

1

2

Pot = 130-003-02

EFX

(EXT)

EFX
(INT)

EQ

1

2

HI
12k

Knob = 760-048-02 (Magenta)
Switch = 500-037-00, Button = 760-107-00

Pot = 130-002-02
Knob = 760-048-03 (Blue)

MID

FREQ

1.5k150

Pot = 130-064-02, Knob = 760-048-04 (Dk Grey)

8k100

LOW
80Hz

Pot = 130-002-02, Knob = 760-048-03 (Blue)

PAN

Pot = 130-003-02, Knob = 760-048-04 (Dk Grey)

Switch = 500-037-00, Button = 760-108-00

MUTE

-

2

1

3-4

Switch = 500-037-00, Button = 760-107-00

SOLO

PFL

12

Fader = 130-031-00, Knob = 760-037-01

All 1/4" jacks = 400-214-00

Quad RCA jack = 400-022-00

XLR = 400-041-00

Switch = 500-037-00
Button = 760-108-00

Switch = 500-037-00
Button = 760-107-00

STEREO EFX

RETURN

LR

1

EFX SEND

2

(MONO) (MONO)

11

LEFT

RIGHT

12

11

U

12

+20-20

TRIM

AUX

U

1

+15

OO

U

2

+15

OO

PRE FADER

U

EFX

1

(EXT)

+15

OO

U

EFX

2

(INT)

+15

OO

EQ

U

HI

12k

-15

+15

U

HI

MID

3k

-15

+15

U

MID

400Hz

-15

+15

U

LOW
80Hz

-15

+15

PAN

LR

11-12

ASSIGN ASSIGN

MUTE

dB
10

5

U

5

10

20

30

40
50
60

OO

1

3-4

SOLO

PFL

dB
10

-

2

5

U

5

10

20

30

40
50
60

TRIM

OO

OO

PRE FADER

OO

OO

-15

-15

-15

-15

LR

9-10

ASSIGN

dB
10

5

U

5

10

20

30

40
50
60

OO

U

U

U

U

U

U

U

U

U

9

LEFT

RIGHT

10

9

10

+20-20

AUX

1

+15

2

+15

EFX

1

(EXT)

+15

EFX

2

(INT)

+15

EQ

HI

12k

+15

HI

MID

3k

+15

LOW LOW
MID

400Hz

+15

LOW
80Hz

+15

PAN

MUTE

1

-

2

3-4

SOLO

PFL

TAPE

OUTPUT

MAIN INSERT

L

TAPE

INPUT

1

L

MAIN OUT

LL

R

R

2

R

1

1

L

2

2

R

AUX SENDUTILITY OUT

SUB OUT

MAIN OUT

LAMP

12V 0.5A

L

R

EFX

3

R

FOOT

SWITCH

4

S

75Hz

SUB OUT

PHONES

Pot = 130-061-02, Knob = 760-048-01 (white)

Pot = 130-003-02
Knob = 760-048-02 (magenta)
Switch = 500-037-00, Button = 760-107-00

Pot = 130-061-02, Knob = 760-048-03 (blue)

Pot = 130-061-02, Knob = 760-048-04 (dark grey)

Pot = 130-061-02, Knob = 760-048-03 (blue)

Pot = 130-003-02, Knob = 760-048-04 (dark grey)

SUB

OO

1

LEFT

RIGHT

SUB

ASSIGN

dB
10

5

U

5

10

20

30

40
50
60

OO

2

LEFT

RIGHT

SUB

ASSIGN

dB
10

5

U

5

10

20

30

40
50
60

OO

3

LEFT

RIGHT

SUB

ASSIGN

dB
10

5

U

5

10

20

30

40
50
60

OO

4

LEFT

RIGHT

STEREO

MAIN MIX

dB
10

5

U

5

10

20

30

40
50
60

OO

Fader = 130-032-00 (dual)
Knob = 760-037-01

Fader = 130-031-00 (mono)
Knob = 760-037-03 (blue)

Fader = 130-032-00 (dual)
Knob = 760-037-01

13

Pot = 130-003-02
Knob= 760-048-02
(magenta)

Red LED = 304-027-02

Pot = 130-061-02
Knob= 760-048-01 (white)

Pot = 130-003-02
Knob= 760-048-01 (white)

Encoder = 500-045-00
Knob= 760-091-00

Pot = 130-022-02
Knob= 760-048-03 (blue)

MASTER SEND

U

+15

OO

U

+15

OO

U

+15

OO

CLIP

U

+15

OO

EFX 2
SEND

REVERSE

GATED

CATHEDRAL

LG. HALL

MD.HALL
LG. PLATE
MD.PLATE
SM. ROOM

NORMAL NORMAL

100

TIME

RATE

15
10

AUX

5
0

1

5
10
15

2

EFX

1

(EXT)

EFX 2 (INT) RETURN MASTERS

U

+15

OO

TO MAIN MIX

WIDE BYPASS

REVERBS

CHORUS/FLANGE/PHASER

CFX12 MIXER

12 CHANNEL COMPACT INTEGRATED LIVE SOUND MIXER

U

+15

OO

1 AUX 2

AUX

EFFECTS TO MONITOR

DELAY 1
DELAY 2
DELAY 3
DELAY 4
CHORUS
FLANGE
PHASER
SPRING

EFX

DELAYS

1K50025063 125 16K2K 4K 8K

STEREO GRAPHIC EQ

U

+15

OO

(MUTES ALL CHANNELS)

100

DAMPING

DEPTH

U

+20

OO

EFX 1 RETURN

U

+20

OO

TAPE LEVEL

BREAK SWITCH

OO

MAX

PHONES LEVEL

U

+10

OO

UTILITY OUT LEVEL

PHANTOM POWER

POWER STATUS

ZERO

LEVEL

SET

RUDE SOLO

48v

LEFT RIGHT

22
10
7
4
2
0
2
4
7
10
20
30

=

0dBu

0dB

15
10

5
0

All Faders = 130-075-00

5
10
15

Yellow LED = 304-028-02
Switch = 500-037-00

Button = 760-107-00

Red LED = 304-027-02

CLIP

Red LED = 304-027-02
Yellow LED = 304-028-02

Green LED = 304-029-02

RED LED = 304-002-00

Feet = 750-001-00

Switch = 500-037-00
Button = 760-107-00
Red LED = 304-027-02

POWER

ON

IEC Power socket = 400-132-00

Pot = 130-061-02
Knob= 760-048-01 (white)
Switch = 500-037-00
Button = 760-107-00

14

Power Switch = 500-052-00

PARTS LIST

Click any item to open that page

Parts Numbering guide

040- Cables
055- Finished PCB Assy
100- Pots and resistors
200- Capacitors
300- Semiconductors
400- Jacks/Connectors
500- Switches
510- Fuses
550- Chassis Metalwork
600- Transformers
601- Inductors
610- Wires and Cables
640- AC line cords
700- Hardware
760- Knobs/Plastic

PART# DESCRIPTION PAGES
090-063-00 MASTER PARTS A-2

055-192-00 EFFECTS BOARD A-4
055-241-00 MASTER BOARD A-5
055-242-00 SLAVE 4 BOARD A-10
055-258-00 POWER SUPPLY BOARD A-12
055-260-00 AC INPUT BOARD A-12

770- Fans
790- Misc./Packing
800- Printed Material
860- EPROM

Components noted with this symbol shall be replaced only by the component specified.
This is required to maintain product safety.

A-1

Master Parts List CFX Assembly

Item# Part # Description R ev Qt y N otes

090-120-00 CFX12 A3-A2 1 CFX12 ASSEMBLY
090-121-00 CFX16 A3-A2 1 CFX16 ASSEMBLY

090-122-00 CFX20 A3-A2 1 CFX20 ASSEMBLY
1 040-358-00 CBL RIB 18G 7P .156 16IN B 1
4 055-192-00-01 PCB ASSY LC EFTS-PWR MIX B1-A1 1 See Page A-4

055-241-00-02 ASSY PCB CFX MASTER A-A2 1 See Page A-5
6 055-242-00-01 ASSY PCB CFX SLAVE 4 1-A1 1 See Page A-10
7 055-258-00-01 PCB ASSY PWR SPLY CFX A-A1 1 See Page A-12
8 055-260-00-01 PCB ASSY AC INPUT CFX A-A1 1 See Page A-12
9 080-142-00 SA XFMR -010 120V A-A1 1 120V models (all CFX)
9 080-142-01 SA XFMR -010 230V A 1 230V models (all CFX)
9 080-142-02 SA XFMR -010 100V A 1 100V models (all CFX)
2 080-144-00 SA BNC CFX 12/16/20 C1 A 1 1
44 400-365-00 QDISK TAB .250 M #6 MNT A 1
11 410-005-00 INSL SILPAD TO-220 A 4
12 510-001-00 FUSE SB 1A 5X20MM 250V UL B 1 120V models (all CFX)
12 510-002-00 FUSE SB .5A 5X20 250V IEC C 1 230V models (all CFX)
12 510-025-00 FUSE SB 1.25A 5X20MM 250V B 1 100V models (all CFX)
13 550-442-00 CHASSIS TOP CXF 12 1 CFX12
13 550-443-00 CHASSIS TOP CXF 16 A 1 CFX16
13 550-444-00 CHASSIS TOP CXF 20 A 1 CFX20
14 550-445-00 CHASSIS BOTTOM CXF 12 A 1 CFX12
14 550-446-00 CHASSIS BOTTOM CXF 16 A 1 CFX16
14 550-447-00 CHASSIS BOTTOM CXF 20 A 1 CFX20
15 550-462-00 CLAMP TO-220 X 4 A 1
43 550-491-00 FAB PLT HTSK CFX PWR SPLY A 1
16 550-551-10 PNT LEFT SIDE CFX A 1
17 550-551-20 PNT RIGHT SIDE CFX A 1
18 550-552-00 BACK CFX 12 B 1 CFX12
18 550-553-00 BACK CFX-16 B 1 CFX16
18 550-554-00 BACK CFX-20 B 1 CFX20
20 620-045-00 CBL FLT 14C W/PINS 3.5IN A 2, 4, 6 (2 for CFX•12, 4=•16, 6=•20)

640-001-00 LC IEC SJT 10A/125V 6FT D 1 120v Linecord

640-002-02 LC JAPAN 12A 125VAC 8FT C 1 100V Linecord
22 700-010-00 TF 6-32X1/4 PHP BLKZC A 26
23 700-011-00 MCH 4-40X1/4 BTNSKT BLKOX A 34, 44, 54
24 700-028-01 SEMS 6-32X5/16 PHP BLKZC B 6
25 700-028-03 SEMS 6-32X1/2 PHP BLKZC B 4
26 701-016-00 5-20X5/16 PHPII TYP B BLK A 23, 31, 39
27 705-001-00 KEPNUT 6-32 A 4
28 705-003-00 NUT HEX-SPLD W/400-214-00 A AR
29 705-008-00 NUT LOCK 8-32 A 2
31 710-002-00 WASHER-SPLD W/400-214-00 A AR
33 750-001-00 BUMPON ROUND BLK .63X.31 A 4
34 760-037-01 KNOB SLIDE 10X25MM MLDLIN A 11, 15, 19
35 760-037-03 KNOB SLIDE 11X24 BLUE A 4
36 760-048-01 KNOB 9MM LT GRY B 17, 21, 25

760-048-02 KNOB 9MM MAGENTA B 44, 60, 76

760-048-03 KNOB 9MM BLU/GRY B 34, 46, 58
39 760-048-04 KNOB 9MM DARK GRAY B 18, 26, 34
40 760-091-00 KNOB MASTER VOLUME A 1
41 780-050-00 LIPSEAL MASTER CFX A 1
42 780-051-00 LIPSEAL SLAVE 4 CFX A 1, 2, 3

Note: The Item numbers in the first column refer to the circled numbers in the exploded views,

chapters B, C and D.

A-2

Components noted with this symbol shall be replaced only by the component specified.
This is required to maintain product safety.

Item# Part # Description R ev Qt y N otes

790-002-00 BAG POLY 12 X 18 2MIL A 1

790-027-00 BAG POLY 20X7X36 4MIL GUS A 1

800-130-00 BOX CMPT CFX 12 B 1 CFX12

800-131-00 BOX CMPT CFX 16 B 1 CFX16

800-132-00 BOX CMPT CFX 20 B 1 CFX20

810-086-00 FOAM SET CFX 1

820-104-00 OWNR MNL COMPACT CFX A 1 COVERS ALL CFX

A-3

055-192-00 REV B, Effects board

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

080-088-00 IC, ADSP-2163 U2
140-009-00 RESISTOR TF SMT 2.2 5% R11
140-049-00 RES TF SM .1W 5% 100 OHM 100 5% R33-34
140-053-00 RESISTOR TF SMT 15 0 5% R13-14
140-073-00 RESISTOR TF SMT 1K0 5% R4 R8-9 R20 R31
140-089-00 RESISTOR TF SMT 4K7 5% R19 R21 R23-30
140-097-00 RESISTOR TF SMT 10K 5% R7 R10 R32
140-097-00 RESISTOR TF SMT *DO NOT STUFF* 1 0K 5% R16-18 R15
140-114-00 RESISTOR TF SMT 47K 5% R3 R5-6 R22
140-123-00 RESISTOR TF SMT 100K 5% R2 R12
140-123-00 RES TF SM .1W 5% 100K OHM 100K 5% R35
140-139-00 RESISTOR TF SMT 470K 5% R1
212-001-00 CAPACITOR CERAMIC SMT 0.01 10% C30-31
212-003-00 CER 100PF 5% 50V NPO SM 100PF 5% C46 C49
212-005-00 CAPACITOR CERAMIC SMT 20PF 5% C2 C6
212-007-00 CAPACITOR CERAMIC SMT 0.047 5% C18
212-016-00 CER 1000PF 5% 5OV NPO SM 1000PF 5% C42-45 C47-48 C50-56
212-023-00 CAPACITOR CERAMIC SMT 0.001 10% C7-8 C36
212-024-00 CER 1UF 25V Y5V 1206 1UF -400 C10-11 C15 C34
212-027-00 CAPACITOR CERAMIC SMT .1UF 10% C1 C3-4 C12 C14 C16-17 C20 C24-25 C27

C29 C32-33 C38
212-029-00 CAPACITOR CERAMIC SMT 270PF 5% C22-23
212-032-00 CAPACITOR CERAMIC X7R SMT 2200PF 10% C35 C37 C39-41
220-011-00 LYT 100UF 20% 25V RAD 100U F 10 % C5
223-003-00 LYT 22UF 20% 6.3V SM 22UF 20% C9
223-004-00 LYT 10UF 20% 16V SM 10UF 20% C13 C19 C21 C26 C28
300-003-00 DIODE SIGNAL SMD DL4148 D1-4
315-017-00 CRYSTAL, 24.576 MHZ 24.576 Y1
325-027-03 IC, SMD, DUAL D F/F 74HC74A U6
325-071-03 IC, HEX, INV, SMD 74HCU04 U1
329-042-03 IC, AD1819 QFP AD1819 U3
329-047-03 IC, 32KX8 SRAM 20nS 7C256-20 U4-5
400-280-00 HDR, SKT, 16P, .1X1 STR 1.75 J1
450-192-00 PCB, LC EFFECTS Z1
601-009-00 FERRITE BEAD, SMT Z=1000 FB1-3
601-010-00 FERRITE SMT POWER Z=73 FB5

192b

A-4

241a

055-241-00 REV A, Master board

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

040-137-00 CBL ASSY, 18GA 1010 GRN/YEL 9” E2

LUG/AMP IN

130-002-02 POT RTY 50KB 9MM MNO H TN 50KB R47 R55 R59 R126 R135 R139 R209 R220

R224 R285 R294 R298

130-003-02 POTRTY 50KG 9MM MN TN PAN 50KG R32-33 R38-39 R63 R112-113 R118-119

R143 R195-196 R201-202 R228 R273-274
R279-280 R304 R332-333 R340-341 R387
R429-430 R438-439 R492 R525-526 R531

R535 R617 R621
130-022-02 RESISTOR POT 9MM HORIZ 10KB R545 R629
130-030-02 RESISTOR POT 9MM HORIZ 5KZY R15 R95 R180 R260
130-031-00 POT SLD 10KD 60MM MONO 10KD R74 R154 R239 R316 R562 R569 R648 R713
130-032-00 POT SLD 50KD 60MM DUAL 50KD R398 R503 R861
130-061-02 POT 50KG 12MM DUAL WO SLV 50KG R320 R350 R360-361 R374 R417 R450

R464-465 R481 R539 R744 R748 R753 R759
130-064-02 POT 500KC 12MM DUL WO SLV 500KC R56 R136 R221 R295
130-075-00 POT SLD 50KW 30MM PANA 50KW R603 R605 R664-665 R669 R729 R732 R735

R825
140-032-00 RESISTOR CF 20 5% R848
140-037-00 RESISTOR CF 33 5% R847
140-049-00 RESISTOR TF SMT 10 0 5% R624
140-051-00 RES TF SM .1W 5% 120 OHM 120 5% R407 R409 R412 R415 R514 R516 R576

R578 R652 R654 R786 R790 R846
140-057-00 RESISTOR CF 220 5% R852-853 R857-860
140-061-00 RESISTOR CF 330 5% R842 R844
140-064-00 RES TF SM .1W 5% 430 OHM 430 5% R765
140-065-00 RESISTOR CF 47 0 5% R841 R843 R845
140-066-00 RES TF SM .1W 5% 510 OHM 510 5% R35 R37 R40-41 R70-73 R115 R117 R121

R132 R150-153 R198 R200 R204 R215

R235-238 R276 R278 R282 R291 R312-315

R336-337 R347 R356 R394-397 R433-434

R445 R456 R499-502 R618 R675 R840

R850-851
140-068-00 RESISTOR CF 620 5% R839
140-073-00 RES TF SM .1W 5% 1K0 OHM 1K0 5% R10 R13 R53-54 R60 R62 R85 R88 R133-134

R140 R142 R170 R173 R216-217 R225 R227

R255 R258 R292-293 R299 R301 R351-354

R365-368 R370-372 R376 R378-381

R451-454 R461-462 R469-472 R474-476

R479-480 R483-487 R494 R534 R552 R623
140-074-00 RESISTOR CF 1K1 5% R574-575
140-076-00 RESISTOR CF 1K3 5% R838
140-077-00 RESISTOR TF SMT 1K5 5% R548 R628
140-079-00 RES TF SM .1W 5% 1K8 OHM 1K 8 5% R568 R572 R647 R650
140-080-00 RES TF SM .1W 5% 2K0 OHM 2K 5% R23 R103 R187 R265 R622 R747 R834 R837
140-083-00 RESISTOR TF SMT 2K7 5% R547 R627
140-084-00 RESISTOR TF SMT 3K0 5% R5-6 R9 R12 R80-81 R84 R87 R165-166

R169 R172 R250-251 R254 R257
140-085-00 RES TF SM .1W 5% 3K3 OHM 3K 3 5% R691-692
140-086-00 RES TF SM .1W 5% 3K6 OHM 3K 6 5% R327 R329 R421 R423
140-087-00 RESISTOR CF 3K9 5% R51 R61 R131 R141 R214 R226 R290 R300

R303 R382-384 R386 R488 R490-491 R836
140-088-00 RES TF SM .1W 5% 4.3K 4 K 3 5% R556-557 R636-637 R701-702 R766-767

A-5

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

140-089-00 RES TF SM .1W 5% 4K7 OHM 4K 7 5% R29 R64-69 R109 R144-149 R182-183

R229-234 R305-311 R388-393 R493

R495-498
140-090-00 RES TF SM .1W 5% 5K1 OHM 5K 1 5% R20 R34 R36 R42-43 R57-58 R100 R114

R116 R120 R122 R137-138 R156 R158 R184

R194 R197 R199 R203 R205 R222-223 R241

R245 R275 R277 R281 R283 R296-297

R334-335 R338-339 R342-346 R348-349

R355 R400 R404 R431-432 R435-436

R440-444 R446-447 R455 R505 R509 R522

R529 R533 R538 R553-554 R563 R642 R707

R770 R776-777
140-091-00 RESISTOR CF 5K6 5% R835
140-094-00 RES TF SM .1W 5% 7K5 OHM 7K 5 5% R50 R130 R213 R289 R358-359 R459-460

R558 R638 R693 R698 R703 R768 R854

R868
140-097-00 RES TF SM .1W 5% 10K OHM 10 K 5% R44-45 R75 R123-124 R160 R206-207

R218-219 R244 R317 R448 R458 R540-541

R543-544 R549 R555 R559-561 R567 R580

R583-584 R586-588 R590-591 R597-599

R601 R609 R612-613 R615-616 R619-620

R625-626 R633-635 R639-641 R646

R657-658 R672-673 R676-677 R686-687

R694-696 R699-700 R704-706 R709 R711

R714 R718-719 R722 R739-740 R743 R754

R764 R769 R771-773 R782 R784 R789

R793-795 R797 R799 R812 R814 R817-823

R826 R828 R833 R849 R869 R872 R875

R877
140-098-00 RES TF SM .1W 5% 11K OHM 11 K 5% R155 R157 R240 R243 R399 R403 R504

R508 R565 R570 R644 R649
140-101-00 RES TF SM .1W 5% 15K OHM 15 K 5% R159 R161 R242 R246 R377 R463 R478

R489 R571 R573 R651 R716
140-104-00 RES TF SM .1W 5% 20K OHM 20K 5% R30 R46 R91 R110 R125 R176 R208 R284

R542 R546 R874 R876
140-105-00 RESISTOR TF SMT 22K 5% R537
140-108-00 RESISTOR TF SMT 27K 5% R11 R86 R171 R256
140-109-00 RES TF SM .1W 5% 30K OHM 30 K 5% R262 R272 R323 R325 R328 R331 R405-406

R419 R422 R425 R427 R437 R449 R510-511

R518 R521 R527 R536 R680-681 R688-690

R697 R749-750 R755-756 R760-761
140-111-00 RES TF SM .1W 5% 36K OHM 36 K 5% R25 R105 R189 R267 R678-679 R682-683
140-112-00 RES TF SM .1W 5% 39K OHM 39 K 5% R870-871
140-114-00 RES TF SM .1W 5% 47K OHM 47 K 5% R48-49 R127-128 R210-211 R286-287 R302

R357 R364 R375 R385 R457 R468 R482
140-119-00 RES TF SM .1W 5% 75K 75K 5% R362-363 R369 R373 R466-467 R473 R477
140-123-00 RES TF SM .1W 5% 100K OHM 100K 5% R3-4 R17 R27 R31 R52 R78-79 R89 R94 R97

R107 R111 R129 R164 R174 R179 R191

R193 R212 R249 R269 R271 R288 R318-319

R321-322 R324 R326 R330 R411 R414 R418

R420 R424 R512-513 R519-520 R528 R532

R550-551 R564 R566 R630-632 R643 R645

R708 R710 R751-752 R757-758 R762 R774

R778 R785 R787 R791 R810-811 R855-856

R862-863
140-130-00 RES TF SM .1W 5% 200K OHM 200K 5% R401-402 R506-507 R796 R798

241a

A-6

241a

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

141-051-00 RES TF SM .25W 5% 120 OHM 12 0 5% R28 R108 R192 R270 R408 R410 R413 R416

R515 R517 R577 R579 R653 R655 R763

R775 R779-781 R783 R788 R792 R800-809

R865-866
145-066-00 RES MF SM .1W 1% 4.75 OHM 4.75 1% R16 R96 R181 R261
145-279-00 RES MF SM .1W 787 OHM 787 1% R596 R608
145-288-00 RESISTOR MF SMT 976 1% R723 R730
145-296-00 RESISTOR MF SMT 1K18 1% R816 R831
145-307-00 RESISTOR MF SMT 1K54 1% R593 R604
145-317-00 RESISTOR MF SMT 1K96 1% R663 R670
145-330-00 RES MF SM .1W 1% 2K43 OHM 2K43 1% R684-685 R745-746
145-330-00 RESISTOR MF SMT 2K43 1% R727 R736
145-339-00 RESISTOR MF SMT 3K01 1% R14 R90 R175 R259 R592 R602
145-341-00 RES MF SM .1W 1% 3K16 OHM 3K16 1% R426
145-346-00 RES MF SM .1W 1% 3K57 OHM 3K57 1% R19 R93 R99 R178
145-350-00 RESISTOR MF SMT 3K92 1% R660 R666
145-352-00 RES MF SM .1W 1% 4K12 OHM 4K12 1% R18 R92 R98 R177
145-356-00 RES MF SM .1W 1% 4K53 OHM 4K53 1% R712 R715
145-358-00 RESISTOR MF SMT 4K75 1% R726 R734
145-368-00 RESISTOR MF SMT 6K04 1% R595 R607
145-373-00 RES MF SM .1W 1% 6K81 OHM 6K81 1% R428
145-377-00 RESISTOR TF SMT 7K50 1% R724 R731
145-388-00 RESISTOR MF SMT 9K76 1% R815 R832 R864 R867 R873
145-389-00 RES MF SM .1W 1% 10K0 OHM 10K0 1% R21-22 R24 R26 R101-102 R104 R106

R185-186 R188 R190 R263-264 R266 R268
145-397-00 RESISTOR MF SMT 12K1 1% R585 R594 R606 R614
145-406-00 RESISTOR MF SMT 15K0 1% R662 R668 R717 R738
145-416-00 RESISTOR MF SMT 19K1 1% R728 R737
145-417-00 RESISTOR MF SMT 19K6 1% R813 R830
145-418-00 RES MF SM .1W 1% 20K0 OHM 20K0 1% R7-8 R82-83 R167-168 R252-253
145-426-00 RESISTOR MF SMT 24K3 1% R582 R589 R600 R611
145-435-00 RESISTOR MF SMT 30K1 1% R659 R661 R667 R674
145-445-00 RESISTOR MF SMT 38K3 1% R721 R725 R733 R742
145-455-00 RESISTOR MF SMT 48K7 1% R581 R610
145-456-00 RES MF SM .1W 1% 49K9 OHM 49K9 1% R523-524 R530 R824 R827 R829
145-464-00 RESISTOR MF SMT 60K4 1% R656 R671
145-474-00 RESISTOR MF SMT 76K8 1% R720 R741
146-373-00 RES MF SM .25W 1% 6K81 OHM 6K81 1% R1-2 R76-77 R162-163 R247-248
200-010-02 PLY .0018UF 10% 100V TR 0.0018 2.00% C34 C75 C121 C163 C192-193 C234-235
200-011-02 CAPACITOR MYLAR T&R 0.0022 2.50% C409-412 C420-423 C467-468 C480-481
200-013-02 PLY .0082UF 10% 100V TR 0.0082 2.00% C195-198 C236-237 C241-242
200-014-02 PLY .0033UF 10% 100V TR 0.0033 2.50% C35-36 C76-77 C123-124 C164-165
200-025-02 PLY/BX .56UF 5% 63V TR 0.56 C39 C80 C127 C168 C171 C203 C210

C249
200-029-02 CAPACITOR MYLAR T&R 0.22 10% C316-319 C330-333 C354-355 C367-368

C500-501 C505
200-031-02 PLY .022UF 2% 50V TR 0.022 5% C199-200 C204-205 C243-244 C250-251

C356-359 C369-372 C407-408 C418-419
212-001-00 CER .01UF 10% 50V X7R SM 0.01 10% C14 C17-18 C20 C24 C29 C31 C54 C57

C59 C61 C65 C70 C72 C82 C85 C99

C102-103 C105-106 C110 C115-116 C118

C122 C130-131 C147 C150 C154 C160

C230 C238 C265 C272-273 C277-280

C291-292 C320 C322-325 C328-329

C360-366 C373 C376 C413-417 C471-474

C478-479 C482-483 C488 C509-510

C516-517

A-7

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

212-003-00 CER 100PF 5% 50V NPO SM 100PF 5% C334 C338
212-004-00 CER 220PF 5% 50V NPO SM 220PF 5% C5 C45 C90 C138
212-005-00 CER 20PF 5% 50V NPO SM 20PF 5% C81 C83 C129 C132 C180 C184 C188

C212 C215 C224 C255 C258 C264 C266

C275 C282 C290 C303 C309 C313 C340

C342 C348 C351 C374-375 C378-380

C384-385 C391-393 C399 C402 C440
212-006-00 CAPACITOR CERAMIC SMT 470PF 5% C2 C4 C6 C11 C42 C44 C46 C51 C87 C89

C91 C96 C135 C137 C139 C144
212-007-00 CER .047UF 20% 50V Z5U SM 0.047 20% C513
212-009-00 CER 47PF 5% 50V NPO SM 47PF 5% C12-13 C52-53 C97-98 C145-146

C228-229 C231-232 C308 C347 C398

C441 C444-445 C450 C454 C457 C460

C504 C506
212-010-00 CAPACITOR CERAMIC SMT .1UF -400 C19 C58 C60 C104 C170 C182-183 C202

C207 C214 C217 C222-223 C239-240

C245-246 C248 C257 C260 C285 C287

C295 C297 C300-302 C304-305 C310

C314 C336-337 C339 C343-344 C349

C352 C377 C381-383 C386-389 C394-395

C400 C403 C442-443 C447-448 C452

C455 C458 C461 C463-464 C485

C489-493 C496-497 C507-508 C514-515
212-015-00 CAPACITOR CERAMIC SMT 33PF 5% C288 C293
212-018-00 CER 10PF 5% 50V NPO SM 10PF 5% C32 C73 C119 C161 C169 C201 C206

C247
212-019-00 CAPACITOR CERAMIC SMT 150PF 5% C10 C15 C21 C23 C50 C55 C62 C64 C95

C100 C107 C109 C143 C148 C151 C153
212-021-00 CAPACITOR CERAMIC SMT 27pF C270-271 C276 C321 C326-327 C469-470

C475-477 C484
212-023-00 CAPACITOR CERAMIC SMT 0.001 10% C9 C49 C94 C142 C175 C220
220-002-02 LYT 47UF 20% 25V RAD TR 47UF 20% C3 C8 C26 C28 C30 C33 C37-38 C40 C43

C48 C67 C69 C71 C74 C78-79 C84 C88

C93 C112 C114 C117 C120 C125-126

C128 C133 C136 C141 C156 C158-159

C162 C166-167 C172-174 C176-179 C181

C185-187 C189-191 C194 C208-209 C211

C213 C216 C218-219 C221 C225-227

C233 C252-254 C256 C259 C261-263

C267-269 C274 C281 C283-284 C286

C289 C294 C296 C306-307 C311-312

C315 C335 C341 C345-346 C350 C353

C390 C396-397 C401 C404-406 C424-439

C446 C449 C451 C453 C456 C459 C462

C465-466 C486-487 C494-495 C498-499

C502-503 C511-512
220-003-02 LYT 47UF 20% 50V RAD TR 47UF 10% C1 C7 C41 C47 C86 C92 C134 C140
220-004-02 CAPACITOR LYTIC RADIAL T&R 470UF 10% C16 C56 C101 C149
220-008-02 LYT 1UF 20% 50V RAD TR 1UF 10% C298-299
220-013-02 LYT .22UF 20% 50V RAD TR .22UF 10% C22 C25 C27 C63 C66 C68 C108 C111

C113 C152 C155 C157

241a

A-8

241a

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

300-003-00 DIODE SIGNAL SMD DL4148 D24-25 D54-59
301-004-00 DIO PWR DL4002 SM DL4002 D1-4 D6-9 D11-14 D16-19
302-010-03 DIO ZEN DL5232B 5.6V SM DL5232 D22-23
304-002-00 LED RED T1-3/4 W FLASHER RED D5 3
304-027-02 LED RED W/.425 SPACER TR RED D21 D26 D28 D40-41
304-028-02 LED YEL W/.425 SPACER TR YEL D5 D10 D15 D20 D27 D29 D42
304-029-02 LED GRN W/.425 SPACER TR GRN D30-39 D43-52
310-002-02 XSTR PNP 2N4403 T/A 2N4403 Q12-13
311-001-00 XSTR NPN IMBT4401 SM IMBT4401 Q9-11
311-002-00 X-SISTOR PNP SMD IMBT4403 Q1-8
320-011-00 I.C. LINEAR NJM 4560 U60-61
320-012-00 OPAMP NJM4560M NJM4560M U1 U3-5 U7-31 U33-34 U36-39 U41-59

U62-65 U72-77
323-002-00 I.C. QUAD COMPARATOR SMD LM339 U2 U6 U66-71
325-086-03 IC, ANALOG MUX/DEMUX 74HC4053 U32 U35 U40
400-022-00 CONNECTOR JACK QUAD RCA HORIZ J25
400-041-00 CONNECTOR XLR PC MTG VERT MALE J39-41
400-048-00 HDR 7P .156X1 RTA J44
400-214-00 JACK 1/4 V PCMNT 1MM WASH J2-3 J7-8 J10-11 J13-24 J26-33 J35-38

J42-43
400-223-00 CONNECTOR XLR PC MTG VERT FML J1 J6 J9 J12
400-349-00 HDR SKT BOT ENTRY 14P .100X1 J4-5
450-241-00 PCB, CFX: MAIN Z2
500-037-00 SWITCH 2PDT PUSH V SNAPIN 2P2T SW1-46
500-045-00 SW ROT ENCODER 15.5MM 4BIT S1
601-010-00 FERRITE BEAD, SMT Z=73 L1
620-042-00 CBL FLEX STRIP 16C .1X1 4IN J34
660-002-00 JUMPER WIRE 24GA T&R Z1 Z5-7 Z50 Z901
660-002-00 JUMPER WIRE 24GA T&R JP1-76
706-009-00 SPACER, NYLON, LED .385 Z8
706-033-01 STDF SWAGE NO.4 X .542L F H1-21
706-038-00 STDF NO.4 X .250L H22-24
760-107-00 BTN 2 COLOR 9X5MM B1-2 B4-8 B10-14 B16-20 B22-25 B27-30

B32-46
760-108-00 BTN 2 COLOR 9X9MM B3 B9 B15 B21 B26 B31

A-9

550-242-00 REV A, Slave 4 board

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

130-002-02 POT RTY 50KB 9MM MNO H TN 50KB R47 R55 R59 R126 R135 R139 R209 R220

R224 R285 R294 R298
130-003-02 POTRTY 50KG 9MM MN TN PAN 50KG R32-33 R38-39 R63 R112-113 R118-119

R143 R195-196 R201-202 R228 R273-274

R279-280 R304
130-030-02 RESISTOR POT 9MM HORIZ 5KZY R15 R95 R180 R260
130-031-00 POT SLD 10KD 60MM MONO 10KD R74 R154 R239 R316
130-064-02 POT 500KC 12MM DUL WO SLV 500KC R56 R136 R221 R295
140-066-00 RES TF SM .1W 5% 510 OHM 510 5% R35 R37 R40-41 R70-73 R115 R117 R121

R132 R150-153 R198 R200 R204 R215

R235-238 R276 R278 R282 R291 R312-315
140-073-00 RES TF SM .1W 5% 1K0 OHM 1K0 5% R10 R13 R53-54 R60 R62 R85 R88 R133-134

R140 R142 R170 R173 R216-217 R225 R227

R255 R258 R292-293 R299 R301
140-080-00 RES TF SM .1W 5% 2K0 OHM 2K 5% R23 R103 R187 R265
140-084-00 RESISTOR TF SMT 3K0 5% R5-6 R9 R12 R80-81 R84 R87 R165-166

R169 R172 R250-251 R254 R257
140-087-00 RESISTOR CF 3K9 5% R51 R61 R131 R141 R214 R226 R290 R300
140-089-00 RES TF SM .1W 5% 4K7 OHM 4K 7 5% R29 R64-69 R109 R144-149 R182-183

R229-234 R305-306 R308-311
140-090-00 RES TF SM .1W 5% 5K1 OHM 5K 1 5% R20 R34 R36 R42-43 R57-58 R100 R114

R116 R120 R122 R137-138 R156 R158 R184

R194 R197 R199 R203 R205 R222-223 R241

R245 R275 R277 R281 R283 R296-297
140-094-00 RES TF SM .1W 5% 7K5 OHM 7K 5 5% R50 R130 R213 R289
140-097-00 RES TF SM .1W 5% 10K OHM 10 K 5% R44-45 R75 R123-124 R160 R206-207

R218-219 R244 R317
140-098-00 RES TF SM .1W 5% 11K OHM 11 K 5% R155 R157 R240 R243
140-101-00 RES TF SM .1W 5% 15K OHM 15 K 5% R159 R161 R242 R246
140-104-00 RES TF SM .1W 5% 20K OHM 20K 5% R30 R46 R91 R110 R125 R176 R208 R284
140-108-00 RESISTOR TF SMT 27K 5% R11 R86 R171 R256
140-111-00 RES TF SM .1W 5% 36K OHM 36 K 5% R25 R105 R189 R267
140-114-00 RES TF SM .1W 5% 47K OHM 47K 5% R48-49 R127-128 R210-211 R286-287
140-123-00 RES TF SM .1W 5% 100K OHM 100K 5% R3-4 R17 R27 R31 R52 R78-79 R89 R94 R97

R107 R111 R129 R164 R174 R179 R191

R193 R212 R249 R269 R271 R288
141-051-00 RES TF SM .25W 5% 120 OHM 120 5% R28 R108 R192 R270
145-066-00 RES MF SM .1W 1% 4.75 OHM 4.75 1% R16 R96 R181 R261
145-339-00 RESISTOR MF SMT 3K01 1% R14 R90 R175 R259
145-346-00 RES MF SM .1W 1% 3K57 OHM 3K57 1% R19 R93 R99 R178
145-352-00 RES MF SM .1W 1% 4K12 OHM 4K12 1% R18 R92 R98 R177
145-389-00 RES MF SM .1W 1% 10K0 OHM 10K0 1% R21-22 R24 R26 R101-102 R104 R106

R185-186 R188 R190 R263-264 R266 R268
145-418-00 RES MF SM .1W 1% 20K0 OHM 20K0 1% R7-8 R82-83 R167-168 R252-253
146-373-00 RES MF SM .25W 1% 6K81 OHM 6K81 1% R1-2 R76-77 R162-163 R247-248
200-010-02 PLY .0018UF 10% 100V TR 0.0018 2.00% C34 C75 C121 C163
200-014-02 PLY .0033UF 10% 100V TR 0.0033 2.50% C35-36 C76-77 C123-124 C164-165
200-025-02 PLY/BX .56UF 5% 63V TR 0.56 C39 C80 C127 C168
212-001-00 CER .01UF 10% 50V X7R SM 0.01 10% C14 C17-18 C20 C24 C29 C31 C54 C57

C59 C61 C65 C70 C72 C82 C85 C99

C102-103 C105-106 C110 C115-116 C118

C122 C130-131 C147 C150 C154 C160
212-004-00 CER 220PF 5% 50V NPO SM 220PF 5% C5 C45 C90 C138
212-005-00 CER 20PF 5% 50V NPO SM 20PF 5% C81 C83 C129 C132

242a

A-10

242a

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

212-006-00 CAPACITOR CERAMIC SMT 470PF 5% C2 C4 C6 C11 C42 C44 C46 C51 C87 C89

C91 C96 C135 C137 C139 C144
212-009-00 CER 47PF 5% 50V NPO SM 47PF 5% C12-13 C52-53 C97-98 C145-146
212-010-00 CAPACITOR CERAMIC SMT .1UF -400 C19 C58 C60 C104
212-018-00 CER 10PF 5% 50V NPO SM 10PF 5% C32 C73 C119 C161
212-019-00 CAPACITOR CERAMIC SMT 150PF 5% C10 C15 C21 C23 C50 C55 C62 C64 C95

C100 C107 C109 C143 C148 C151 C153
212-023-00 CAPACITOR CERAMIC SMT 0.001 10% C9 C49 C94 C142
220-002-02 LYT 47UF 20% 25V RAD TR 47UF 20% C3 C8 C26 C28 C30 C33 C37-38 C40 C43

C48 C67 C69 C71 C74 C78-79 C84 C88

C93 C112 C114 C117 C120 C125-126

C128 C133 C136 C141 C156 C158-159

C162 C166-167 C169-170
220-003-02 LYT 47UF 20% 50V RAD TR 47UF 10% C1 C7 C41 C47 C86 C92 C134 C140
220-004-02 CAPACITOR LYTIC RADIAL T&R 470UF 10% C16 C56 C101 C149
220-013-02 LYT .22UF 20% 50V RAD TR .22UF 10% C22 C25 C27 C63 C66 C68 C108 C111

C113 C152 C155 C157
301-004-00 DIO PWR DL4002 SM DL4002 D1-4 D6-9 D11-14 D16-19
304-028-02 LED YEL W/.425 SPACER TR YEL D5 D10 D15 D20
311-002-00 X-SISTOR PNP SMD IMBT4403 Q1-8
320-012-00 OPAMP NJM4560M NJM4560M U1 U3-5 U7-16
323-002-00 I.C. QUAD COMPARATOR SMD LM339 U2 U6
400-214-00 JACK 1/4 V PCMNT 1MM WASH J2-3 J7-8 J10-11 J13-14
400-223-00 CONNECTOR XLR PC MTG VERT FML J1 J6 J9 J12
400-349-00 HDR SKT BOT ENTRY 14P .100X1 J4-5 J15-16
450-242-00 PCB, CFX: CHANNEL Z1
500-037-00 SWITCH 2PDT PUSH V SNAPIN 2P2T SW1-24
660-002-00 JUMPER WIRE 24GA T&R JP1-31
706-033-01 STDF SWAGE NO.4 X .542L F H1-10
760-107-00 BTN 2 COLOR 9X5MM Z2-17 Z22-25
760-108-00 BTN 2 COLOR 9X9MM Z18-21

A-11

550-258-00 REV B, Power Supply

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

100-028-00 RESISTOR CF 130 5% R1 R4
100-031-00 RESISTOR CF 180 5% R8
100-057-00 RESISTOR CF 2K2 5% R2 R5
100-064-00 RESISTOR CF 4K3 5% R3 R6
110-080-00 RESISTOR CF 20K 5% R7
121-093-00 RESISTOR MF 6K8 5% R9
211-001-00 CAPACITOR CERAMIC 0.01 -400 C5 C11 C15
211-010-00 CER .01UF +80/-20% 50V AX 0.01 -400 C16
220-002-02 CAPACITOR LYTIC RADIAL TAPE 47UF 10% C14
220-007-00 CAPACITOR LYTIC RADIAL 100UF 10% C18
220-011-02 LYT 100UF 20% 25V RAD 100UF 10% C6 C1 3
220-012-02 CAPACITOR LYTIC RADIAL TAPE 4.7UF 10% C19
220-023-00 CAPACITOR LYTIC RADIAL 6,800UF10% C8-9 C12
220-026-00 CAPACITOR LYTIC RADIAL 1,000UF10% C17
220-027-02 CAPACITOR LYTIC RADIAL TAPE 10UF 10% C7 C10
301-001-00 DIO PWR 1N4002 1N4002 D1-7 D12-21
301-003-00 DIODE POWER 1N5401 D8-11
321-003-00 I.C. LINEAR POS 3 TERM VOLTAGE LM 7805 U3

REGULATOR

321-008-00 I.C. ADJ POS 3 TERM VOLTAGE LM317T U1 U4

REGULATOR

321-009-00 I.C. ADJ NEG 3 TERM VOLTAGE LM337T U2

REGULATOR
400-060-00 FUSE CLIP PC MT 5MM DIA NULL Z8-9
400-093-00 HDR 7P .156X1 LOCKING J2
400-173-00 TERM .25 QKDS PCMT STABLE J3
400-348-00 TERM QDISC .187 MALE PCMT J4
400-350-00 HDR 9P .156X1 STR LOCK J1
450-258-00 PCB, CFX POWER SUPPLY Z18
510-002-00 FUSE .5A SLO BLO 5 X 20MM .5A F 1

258b
260a

550-260-00 REV A, AC Power Input

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

040-135-00 CBL ASSY 18GA 1010 GRN/YEL 9” P10
200-023-00 PLY/BX .001UF 20% 250V Y2 .001uF 2 0% C1-2
200-024-00 PLY/BX .01UF 20% 250V Y2 .01uF 2 0 % C3
400-060-00 FUSE CLIP PCMT 5MM DIA Z2-3
400-132-00 IEC MALE RTA PCMT J1
400-173-00 TERM .25 QKDS PCMT STABLE P2 P9
450-260-00 PCB, CFX AC POWER INPUT Z1
500-052-00 SW SPST PWR ROCKER RTA BLK SW 1
712-020-00 BRKT ANG 6-32X.037THK STL BKT1
712-021-01 RIVET, CL END .125” Z6-7

A-12

Components noted with this symbol shall be replaced only by the component specified.
This is required to maintain product safety.

EFX Board Modification Instructions:

Models affected:

All PPM series powered mixers: 406M, 408M, 408S, 808M and 808S
All CFX series compact effects mixers: CFX•12, CFX•16 and CFX•20
Verify the following symptom on any of these units in for repair:

Symptom:

While program material is playing, if the EFX BYPASS switch
is depressed and a delay function is selected, as soon as the
EFX BYPASS is unselected, the program material that was last
recorded in the delay line is played at the outputs. In other
words, the EFX BYPASS switch acts like a sample and hold when
a delay function is selected.

Solution: Cut Pin 1 of the EFX board’s ribbon cable.
Safety Warning:

Caution! These instructions are for use by qualified personnel
only. To avoid electric shock, do not perform any servicing
unless you are qualified to do so. Refer all service and modifying
to qualified personnel.

Tools Required:

Sharp pair of electrical cutters, Phillips screwdriver, safety glasses.

Front
panel EFX
controls for
CFX mixers

Front
panel EFX
controls for
PPM mixers

Powered Mixer repair

In order to perform this on the Powered Mixer series, the front panel must be removed.
1/ Remove all cords- including the power cable and speaker outputs- from the mixer.
2/ Place the mixer on a dry, non-marring surface with the heat sink facing down.
3/ Remove the six screws securing the front panel of the mixer to the plastic enclosure. These are

located three per side on the far left and right edges of the front panel. Keep track of which
screws go where.

4/ Carefully disconnect the white block connector located on the right side of the front panel of the

mixer.

5/ Disconnect the green 16-gauge chassis ground wire located in the center of the bottom edge of

the mixer’s front panel.

6/ Remove the mixer front panel from the plastic chassis and place face down on a dry, non-marring

surface.

7/ Pull the ribbon cable off the EFX board and cut pin 1 as shown in the diagram on page 2. The cut

should be flush with the ribbon cable’s insulation, so there is no chance of any electrical contact.

8/ Replace the ribbon cable onto the EFX board, making sure that all pins are inserted correctly, and

there is no connection to pin 1.

9/ Reassemble the mixer and fully retest before returning it to your customer.

EFX pin1 modification SSE May 2000

EFXmod.pdf, page 1 of 2

THE MACKIE FIXER  MACKIE DESIGNS SERVICE NEWS

CFX Mixer repair

In order to perform this on the CFX Compact Mixer series, the bottom panel must be removed.
1/ Remove all cords- including the power cable from the mixer.
2/ Place the mixer upside down on a dry, non-marring and donut-free surface.
3/ Remove the screws securing the bottom panel of the mixer.
4/ Pull the ribbon cable off the EFX board and carefully cut pin 1 of the cable as shown in the

diagram below. The cut should be flush with the ribbon cable’s insulation, so there is no chance of
any electrical contact.

5/ Replace the ribbon cable onto the EFX board, making sure that all pins are inserted correctly, and

there is no connection to pin 1.

6/ Reassemble the mixer and fully retest before returning it to your customer.

Pin 1 is usually marked
with a line on this side
of the ribbon cable.

RIBBON
CABLE

CUT OFF PIN 1

(as flush as possible)

Remove and take to
your local recycling
center. The y may
give you a dollar just
to go away.

Here it is on the CFX mixers

EFX BOARD, BOLTED TO THE REAR FACE OF THE MIXER BOARD.

EFX pin1 modification SSE May 2000

EFXmod.pdf, page 2 of 2