background image

Product

Date:
Filename:

PCB#

of

Sheet

Rev:

3

1

13V00

M1159V1300sch.sch2002

EF500P

Wed Nov 26, 2008

M1159

EF500P

Product

Date:
Filename:

PCB#

of

Sheet

Rev:

3

1

13V00

M1159V1300sch.sch2002

EF500P

Wed Nov 26, 2008

M1159

EF500P

B

A

+24V

+15V

non-

R

oH

S

-15V

+15V

-15V

+15V

-15V

4148

D38

W5:

A

6

+15V

W5:

F

6

HLIM

B

+15V

-15V

A

+15V

#4947
33K

#4980
470R

*

*

*

-15V

+15V

+15V

W29:

C

4

W29:

B

4

WL

IM

W29:

D

4

1/4W

1K87

R102

.

1/4W

4K12

R84

.

+15V

C82

63V

180N

R189
1/4W

MINI

10K0

R113
1/8W

FLMP

475R

IGND

+15V

-15V

+15V

LVGND2

WLIM

+15V

*

4148

D44

*

LVGND3

LVGND3

+15V

-15V

LVGND2

NET00082

+15V

LVGND4

-15V

R131
1/4W

RAD

4K7

NET00039

NET00039

-15V

LVGND4

LEDGND

+15V

-15V

HLIM

TO POWER AMP PCB

LVGND

IGND

3925

J4

MIC

3925

J2

{Function}

R209
1/4W

MINI

10K0

R205
1/4W

MINI

10K0

C107

50V

22U

R170
1/4W

MINI

10K0

R167

1/4W

MINI

10K0

R149

1/4W

33K

RAD

4148

D42

R126
1/4W

RAD

4K7

1/4W

1M

R108

RAD

R93

1/8W

FLMP

475R

B

R203
1/4W

MINI

1K0

50V

C138

33P

IGND

R190
1/4W

MINI

1K0

LVGND3

R182
1/4W

.

562R

IGND

LVGND3

R134
1/4W

.

1K21

R133
1/4W

MINI

1K0

R114
1/4W

RAD

10K

C76

100V

100N

IGND

C65

100V

100N

R94

1/4W

RAD

10K

+15V

-15V

R191
1/4W

MINI

10K0

LVGND3

C99

16V

33U

R172
1/4W

MINI

1K0

R159

1/4W

4K7

RAD

R154

1/4W

47K

RAD

2

1

6858

NSL-32SR2

U23:A

U24:B

NE5532N

8

V+

4

V-

U24:C

-15V

C78

63V

150N

R92

1/4W

0.1%

681R0

LVGND4

R177

1/4W

MINI

4K7

LVGND2

U21:A

NE5532N

non-RoHS

R127
1/4W

MINI

2K2

-15V

1/8W

75R

R201

FLMP

LVGND3

C95

100V

100N

D62

4148

WOOFCLIP

-15V

1/4W

15K

R156

MINI

*

R136
1/4W

.

590R

P1:A

4434

M

B

10K

MASTER GAIN

R179

1/4W

30K

RAD

R169
1/4W

MINI

6K8

LVGND2

S3:A

3522

DO

W

N

UP

{F

unc

ti

on}

VALUE

1/4W

43K

R137

.

1/4W

30K

R135

.

LVGND2

C80

63V

180N

C64

100V

47N

-15V

LVGND4

R161

1/4W

1M

RAD

R150

1/4W

15K

MINI

+15V

-15V

R141
1/4W

RAD

47K

R125
1/4W

MINI

4K7

LVGND1

4148

D25

R206

1/4W

RAD

220R

LVGND1

C131

100V

100N

+15V

R162
1/4W

RAD

1K5

R147

1/4W

220R

RAD

C90

16V

33U

R138

1/4W

33K

RAD

R129
1/4W

WIR

SOLID

R119
1/4W

MINI

270K

R91

1/4W

820R

RAD

W5:

B

6

-15V

R210
1/4W

MINI

1K2

R192
1/4W

RAD

4K7

LVGND4

C133

100V

100N

50V

C132

100N

U27:A

NE5532N

R146
1/4W

RAD

10K

-15V

4148

D35

LEDGND

Q21
5105

TO92

MPSA13

4148

D31

L2

LIMIT

RED  

+15V

4

3

6858

NSL-32SR2

U15:B

R89

1/4W

MINI

2K

non-RoHS

W5:

E

6

W5:

D

6

TO M1339
LIMITER
BOARD
(RoHS)

LV

G

ND1

R204

1/4W

47K

MINI

R208
SOLID

WIR

22AWG

C135

100V

100N

63V

C93

220N

8

V+

4

V-

U27:C

-15V

+15V

D41

4148

LVGND1

R96

1/2W

.

442R

+15V

R194
1/4W

.

332R0

LVGND

C137

100V

100N

R165

1/4W

100K

RAD

LVGND1

C75

+15V

S5:A

3522

DO

W

N

UP

M

IXER

-15V

R139
1/4W

.

36K

LVGND1

D37

4148

R118
1/4W

RAD

27K

U14:B

NE5532N

4148

D27

R97

1/4W

MINI

1K0

LVGND4

R202

1/4W

1K4

.

K1:B

D13

0W5

1N5250B   

20V0

D63

4148

D39

0A2 

BAT85 

D40
BAT85 

0A2 

R117
1/4W

MINI

10K0

R104
1/4W

MINI

1K0

#5281
10U

#5212
100N

U13:B

NE5532N

LVGND1

R164

1/4W

1K5

RAD

+15V

1/8W

681R
R101

FLMP

HORNGND

R99

1/8W

FLMP

681R

LVGND1

R222

47K

R123
1/8W

FLMP

475R

D34

BAT85 

R85

1/8W

FLMP

681R

1/4W

47K

R163

RAD

LEDGND

L3

CLIP

YEL  

1/4W

1K5

R153

RAD

LVGND

100V

C70

100N

IGND

J1

3453

{Function}

C98

50V

22U

1/4W

1M

R103

RAD

1/4W

100K

R109

RAD

R185

1/4W

2K49

MINI

50V

C129

33P

R174
1/4W

.

562R

8

V+

4

V-

U32:C

M

B

P2:A

4432

10K

MIC_GAIN

R110
1/4W

0.1%

681R0

W29:

A

4

R197

1/4W

47K

RAD

C97

16V

33U

LVGND2

4

3

6858

U23:B

NSL-32SR2

R112

1/4W

3K

MINI

TO M1339
LIMITER
BOARD
(RoHS)

R183

1/4W

RAD

D.N.S.

C128

16V

33U

1/4W

5K1

R145

MINI

R152

1/4W

56K

.

TRIM
/GAIN

8

V+

4

V-

U21:C

R116

1/4W

3K

MINI

100V

C114

D.N.S.

R215

1/4W

D.N.S.

RAD

S3:B

3522

DO

W

N

UP

{F

unc

ti

on}

R87

1/4W

MINI

1K0

R184

1/4W

1K

RAD

R188

1/4W

10K

RAD

TO92

BC560C

Q23

5102

U

26:E

U26:A

LM13600N

C119

100V

100N

250V

C66

4N7

R132

1/4W

18K

MINI

C121

100V

100N

50V

C120

100N

1/4W

1K5

R107

RAD

R144
1/4W

RAD

10K

C123

100V

100N

8

V+

4

V-

U14:C

C125

100V

100N

R158

1/4W

56K

RAD

1/4W

1K07

R176

0.1%

C87

50V

22U

U19:B

NE5532N

R122
1/4W

MINI

10K0

R90

1/8W

FLMP

274R

U20:A

NE5532N

D33

0W5

6V2

1N753ARL  

U12:A

NE5532N

L4

POWER

GRN  

8

V+

4

V-

U20:C

63V

C77

4U7

1/8W

681R

R86

FLMP

1/4W

1K0

R130

MINI

C B

TO-126

MJE350

MJE340

BD238

MJE270

BD139

BD140

E

BD237

MJE271

Q22
5103

TO92

MPSA06

8

V+

4

V-

U18:C

B E

TO-92

BC560C

C

BC550C

8

V+

4

V-

U12:C

B C

TO-92

MPSA63

MPSA43

2N5551

E

MPSA56

MPSA06
MPSA13

2N5401

D S

TO-247

IRFP23N50L

G

IRFP9040N

LVGND2

LVGND2

C83

63V

180N

C62

100V

100P

-15V

NET00082

NET00116

R115
1/4W

RAD

1M

LVGND1

LVGND1

D32

0A2 

BAT85 

D29

0A2 

BAT85 

LIMITER SENSE

non-RoHS

9

W4:I

0

8

W4:H

0

LVGND2

7

W4:G

0

WOOFCLIP

+24V

2

W4:B

0

1

W4:A

0

LVGND4

R196
1/4W

MINI

10K0

R207

1/4W

10K0

MINI

C126

16V

33U

MIXER SECTION

U28:A

NE5532N

8

V+

4

V-

U28:C

IGND

R181
1/8W

FLMP

249R

50V

C108

1N

1/8W

75R

R178

FLMP

C94

50V

22U

R171
1/4W

RAD

47K

R168
1/4W

MINI

220R

R214
1/4W

RAD

470R

R148

1/4W

47K

RAD

BAT85 

D43

U24:A

NE5532N

100V

C86

47N

C73

100V

100P

4148

D30

8

V+

4

V-

U17:C

4148

D26

100V

C72

470P

FROM MIXER

U16:B

NE5532N

8

V+

4

V-

U16:C

R95

1/4W

0.1%

562R0

MAIN INPUT

R195
1/4W

RAD

10K

R200

1/4W

RAD

10K

R199

1/4W

MINI

1K0

R160
1/4W

RAD

4K7

U29:A

NE5532N

1/4W

4K7
R186

RAD

C117

100V

D.N.S.

+15V

R180

1/4W

RAD

2K

C96

100V

68N

R151

1/4W

220R

RAD

R155
1/4W

RAD

1M

16V

C89

33U

C85

100V

47P

R142

1/4W

324R0

0.1%

C79

63V

180N

LVGND1

U17:A

NE5532N

U18:B

NE5532N

C63

100V

68N

M

B

P5:A

4434

10K

T

R

EBLE

R211
1/4W

MINI

1K2

400V

C140

2N2

C139

16V

33U

BASS

R198
1/4W

MINI

470K

U33:B

NE5532N

NET00116

C127

100V

47N

R193
1/4W

RAD

4K7

M

B

P3:A

4435

50K

BASS

LVGND2

LVGND1

LVGND3

C136

100V

100N

C134

100V

100N

U22:A

NE5532N

8

V+

4

V-

U22:C

U27:B

NE5532N

D45

4148

1N753ARL  

D47

0W5

6V2

LVGND2

C84

100V

68N

R120

1/4W

RAD

33K

C74

100V

100N

C69

100V

47N

R106

1/4W

1K87

.

C68

100V

68N

C60

100V

10N

C59

100V

100N

W5:

C

6

TO92

2N5401

Q16
5108

R217
1/4W

RAD

18K

R140
1/4W

RAD

10K

1/4W

220K

R128

MINI

LIMITER

LVGND1

2

1

6858

U15:A

NSL-32SR2

4

W4:D

0

5

W4:E

0

6

W4:F

0

-15V

+15V

3

W4:C

0

U32:A

NE5532N

MIC GAIN

R175
1/4W

MINI

2K49

R173
1/8W

FLMP

249R

50V

C101

1N

100V

C67

470P

U16:A

NE5532N

R111
1/4W

0.1%

562R0

LINE GAIN

U33:A

NE5532N

8

V+

4

V-

U33:C

U32:B

NE5532N

M

B

P4:A

4432

10K

LINE_GAIN

U29:B

NE5532N

8

V+

4

V-

U29:C

U21:B

NE5532N

U22:B

NE5532N

R88

1/4W

MINI

1K0

TREBLE

C130

100V

47P

3696

K1:A

LIMITER

R143
1/4W

RAD

47K

C124

100V

100N

C122

100V

100N

LVGND2

U19:A

NE5532N

8

V+

4

V-

U19:C

R121
1/4W

RAD

27K

1/2W

442R
R100

.

U14:A

NE5532N

8

V+

4

V-

U13:C

U13:A

NE5532N

S5:B

3522

DO

W

N

UP

M

IXER

"STYLE_P25"

R

218

1/4W

MIN

I

1K0

C88

63V

2U2

U20:B

NE5532N

R124
1/4W

MINI

1K0

C61

100V

22N

R157
1/4W

RAD

3K3

S G

TO-92

2N5638

D

J109

ONLY FOR N.A.
REPLACE THE
R128 AND C77
WITH THIS CIRCUIT
R124 REPLACED WITH
#4599, 22AWG SOLID

B C E

TO-220

BDX54B-54C
BDX53B-53C

TO MAIN INPUT

U28:B

NE5532N

MASTER CLIP

U17:B

NE5532N

U18:A

NE5532N

U12:B

NE5532N

RING

1/4i

n J

C

K PC

B M

T

 VER

T

 ST

ER

 R

T

 SWT

J6

{F

unc

ti

on}

RING

1/4i

n J

C

K PC

B M

T

 VER

T

 ST

ER

 R

T

 SWT

J5

{F

unc

ti

on}

RING

1/4i

n J

C

K PC

B M

T

 VER

T

 ST

ER

 R

T

 SWT

J3

{F

unc

ti

on}

RING

1/4i

n J

C

K PC

B M

T

 VER

T

 ST

ER

 R

T

 SWT

J7

{F

unc

ti

on}

REF

OLD

NEW

PART KNOB

PART KNOB

MODEL(S):-

FUNCTION

R
R

R
R
R

R
R

F
F

F
F
F

F
F

O
O

K

K

O
O
O

K

K

K

O
O

K
K

K
K

N
N

K
K
K

N
N
N

K
K

N
N

XC116

M1159

EF500P

P1
P2
P3
P4
P5

MAIN GAIN
MIC GAIN
BASS TONE
LINE GAIN
HORN TONE

4537

8393

4434
4432
4435
4432
4434

8392
8394
8392
8394

4566
4546
4566
4537

9916
9915
9917
9915
9916

"STYLE_P32"

SILENT MIXER ON/OFF

Summary of Contents for EF500P

Page 1: ...Voice 716 297 2920 Fax 716 297 3689 WORLD HEADQUARTERS WEB ACCESS http www yorkville com CANADA Yorkville Sound 550 Granite Court Pickering Ontario L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innovation Since 1963 Printed in Canada SERVICE MANUAL ef500p MODEL TYPE YS1002 ...

Page 2: ... spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped AVIS AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE N ENLEVEZ PAS LE COUVERT OU LE PANNEAU ARRIERE NE CONTIENT AUCUNE PIECE REPARABLE PAR L UTILISATEUR CONSULTEZ UN TECHNICIEN QUALIFIE POUR L ENTRETIENT Instructions relatives au risque de feu choc élect...

Page 3: ... 6113 1 4W 2K 5 MINI T R RES 3 6931 IRFP140N TO247 NCH MFET TM 1 3501 B52200F006 COMP WASH 4 SMALL 9 4705 2 0W 2K2 5 BLK RES 2 6932 IRFP9140N TO247 PCH MFET TM 1 8721 3 8 16X11 4 GRD5 FLAT SCKT HD JS500 9 6104 1 4W 2K2 5 MINI T R RES 6 6967 IRFP23N50L TO247 NCH MFET TM 2 8726 3 8 16X11 2 GRD5 FLAT SCKT HD JS500 9 6114 1 4W 2K49 1 MINI MF T R RES 2 6603 74HC14N IC HEX INV SCHMID 2 9897 CABINET COVE...

Page 4: ...EAKER ENCLOSURE NOTES ALL LINK CONNECTIONS FUNCTION AS INPUTS OR OUTPUTS EXTERNAL MIXERS CONNECT TO LINK INPUTS LINK EF500P Y orkville 1 3 2 1 3 2 2 3 1 24 PHANTOM MIC LINE CD MIXER ON OFF LINE CD LEVEL MIC LEVEL EF500P LEVEL ...

Page 5: ...560C Q23 5102 U26 E U26 A LM13600N C119 100V 100N 250V C66 4N7 R132 1 4W 18K MINI C121 100V 100N 50V C120 100N 1 4W 1K5 R107 RAD R144 1 4W RAD 10K C123 100V 100N 8 V 4 V U14 C C125 100V 100N R158 1 4W 56K RAD 1 4W 1K07 R176 0 1 C87 50V 22U U19 B NE5532N R122 1 4W MINI 10K0 R90 1 8W FLMP 274R U20 A NE5532N D33 0W5 6V2 1N753ARL U12 A NE5532N L4 POWER GRN 8 V 4 V U20 C 63V C77 4U7 1 8W 681R R86 FLMP ...

Page 6: ...6603 HEATSINK R213 1 4W 15K MINI R80 1 4W 0 1 3K16 WOOFGND R49 1 4W 4K7 MINI C45 100V 470P R77 1 4W 37K4 R81 1 4W 37K4 120V U3 B 6964 C33 100V 100N C16 100V 100N R223 0 6W SMALL 18k7 7 GND 14 V U3 C 6964 C3 63V 4U7 1 4W 4K7 R62 RAD C24 100V 100N C6 500V 10P 63V 4U7 C9 4148 D6 R3 2 0W 2K2 R15 1 4W 270R RAD C14 100V 680P C5 100V 100N 250V C51 3U3 C19 100V D N S R11 1 0W 0R47 FLMP 140V C31 3U3 140V C...

Page 7: ...D R34 FROM 33K TO 47K 4 00 3 10 V 3 00 2 10 2 00 V NOV 06 2001 D OCT 22 2001 SEPT 20 2001 SEPT 18 2001 D NOV 29 2001 EF500P 1st RUN CHANGES FOR VER 2 00 AUG 22 2001 2 00 SEE ATTACHED NOTES ON P C B DATA BASE MOVED TRACES UNDER 1 4 JACKS 3921 V4 10 MAR 27 2002 V4 10 CHANGE R208 3K TO JUMPER R204 3K T0 47K R206 1K TO 220R C140 1N5 TO 2N2 AND C91 FROM 680P TO 100N INVERT BOTH AMP OUTPUT WIRE COLORS I...

Page 8: ...3U 16V 47K 2N2 YEL 47K RED GRN 3K16 3K16 68N 10R0 1K0 47K 270K 12K 5 0W 63V 10U TO92 MPSA92 TO92 2N5551 10V0 22U 50V 22U 50V 1M 100K 681R0 470R 27V0 2K2 100N 10N 4N7 140V 3U3 4148 2K2 18k7 0 6W 3U3 250V D N S D N S 63V 4U7 MR854 275V 22N 2200U 63V 50V 2200U 1K8 1 0W MR752 47K 1K0 1K4 4148 1K4 4148 BAT85 681R 47N 47K 33U 16V 1K21 324R0 1K4 47P 4K7 100N 4K7 47K 10K0 1K0 6R2 18V0 1M 3K9 1N5402 562R 4...

Page 9: ...E USED FOR MARCONI TEST POINTS SO HAVE THIS LAYER ON IF DOING ANY MODIFICATIONS 2 SLIDE EMI FILTER OVER RIBBON BEFORE INSERTING INTO P C B NSL 32SR2 12 M1159B U15 AND U23 ARE HAND INSERTED AFTER WAVE SOLDERING PUT OPTOCOUPLERS AS SHOWN IN THE PHOTOS 11 M1159 PARTS REPLACEMENT TABLE 8 NOTE COMPONENTS R183 C114 C117 R215 C30 C19 AND C23 ARE ALL DNS DO NOT STUFF THEY ARE FIXED SO THAT THEY WILL NOT G...

Page 10: ...NLY FOR NORTH AMERICA MODEL EF500P PC 7454 STEP 1 SOLDER THIS NETWORK BE PLACED SEE PIC 1 2 PIC 1 STEP 2 SOLDER LEADS OF AND C77 AS SHOWN PIC 2 STEP 3 SOLDER ALL OPEN ENDS TOGETHER WHERE R128 C77 WOULD USUALLY NETWORK IN OPEN HOLES OF R128 ...

Page 11: ......

Page 12: ...N1020 N1016 N1018 N1017 N1024 N1027 4 W1 D 6 C1 100V 47P R3 1 4W MINI 39K DNS R16 1 4W MINI 22K C2 100V 47P DNS R13 1 4W 3K9 50V C3 100N 2 W1 B 6 1 W1 A 6 R1 1 4W MINI 39K U1 A NE5532N R17 1 4W MINI 8M2 R15 1 4W 3K9 1 8W 249R R10 FLMP 1 8W 249R R9 FLMP R4 1 4W MINI 39K 1 4W 15K R8 MINI R14 1 4W 3K9 R18 1 4W MINI 8M2 1 8W 249R R12 FLMP 1 8W 249R R11 FLMP 8 V 4 V U1 C 50V C4 100N U2 E N1040 N1012 N1...

Page 13: ...39K N1019 N1033 N1035 N1045 N1025 N1037 N1047 N1043 2 W3 B 4 N1000 3 W3 C 4 R24 1 4W MINI 39K 1 4W 15K R38 MINI 1 8W 249R R28 FLMP N1030 R22 1 4W MINI 22K 1 4W 15K R30 MINI 1 4W 3K6 R37 TO92 BC550C Q4 5101 N1036 R29 1 4W MINI 39K R32 1 4W MINI 8M2 N1034 1 8W 249R R33 FLMP 1 8W 249R R34 FLMP R36 1 4W MINI 15K N1038 N1003 8 V 4 V U3 C U8 E 50V C8 100N N1023 TO92 BC560C Q3 5102 50V C7 100N C6 100V 47...

Page 14: ... BC550C 15K 47P NE5532N 39K BC560C 22K 39K 15K BC550C 15K 15K LM13600N BC560C NE5532N LM13600N 47P 3K9 39K 249R 249R 100N 47P 39K DNS 249R 249R 100N 15K 39K 3K9 3K9 DNS 15K 39K 3K9 15K 15K 3K9 Limiter 1V10 M1339 R16 R3 R19 R17 R9 R10 R37 C4 C5 R21 R25 R26 R28 R27 C8 Q1 R5 C1 U1 R1 Q2 R22 R24 R7 Q4 R20 R38 U8 Q3 U3 U2 C2 R13 R2 R11 R12 C3 C6 R35 R32 R34 R33 C7 R6 R4 R14 R15 R18 R8 R29 W3 R23 R36 R3...

Page 15: ......

Page 16: ......

Page 17: ... 005 008 CLINCH SHORT AXIS INSERT ETCH 5190 3538 6517 10U 16V 180K 180K TO92 MBS4992 10R STM BTB 600BRG TO220 W H H W CROWBAR M1369 V2 00 C1 R2 R1 Q2 W5 R3 W3 W AMPIN Q1 W2 H AMPIN W4 W AMPIN W1 H AMPIN ...

Page 18: ......

Page 19: ...p before it will activate the driver chip If there is no load there is no current in the output if there is no current there is no voltage and consequently no feedback pulse The good news is that this class of amp will generally not cook off if you failed to repair it and then try to fire it up It usually just sits there dumbfounded waiting for you to find the missing faulty bits The process for r...

Page 20: ...7R C10 15P R25 100K C118 2N2 V T R C53 100N D2 16V0 D3 MR854 C110 63V 4U7 R17 1 0W 0R47 R11 1 0W 0R47 R12 1 0W 0R47 R23 12R R26 2K21 V T R W U3 74HC74 C43 100N R38 10R0 R75 5 0W 12K R86 681R U13 NE5532N C123 100N C88 63V 2U2 R71 180K U2 MC33078P C28 470P R68 5 0W 12K R69 5 0W 12K C29 10N L3 CLIP YEL L2 LIMIT RED L4 POWER GRN R139 36K R51 6K8 R55 1K R77 37K90 C36 68N R54 1K R64 10R0 R80 3K16 C50 10...

Page 21: ...NI R6 1 4W 12R 1N5242B D1 0W5 12V0 R17 0W 0R47 D2 1N5246B 0W5 16V0 44V R18 0W 0R47 C3 63V 4U7 C6 500V 10P R3 2 0W 2K2 R15 1 4W 270R RAD C5 100V 100N R11 1 0W 0R47 FLMP R12 1 0W 0R47 FLMP C92 100V 3N3 TO92 BC560C Q6 5102 C144 100V 10N R4 2 0W 2K2 400V C118 2N2 6912_S Q2 BDX53C BDX53C TO220 R2 1 4W FLMP 2K21 Q3 5101 TO92 BC550C C1 100V 680P C2 63V 10U G D S Q12 6931 IRFP140N N TO247 IRFP140N P ...

Page 22: ...ER MIXER CLIP LIMIT PWR EF500P LEVEL MIC LINE CD 10 0 TREBLE BASS 12 12 dB 12 12 dB 10 0 6 6 dB LF ROLLOFF 0 100Hz 40Hz MIXER OFF ON YS 9917 Green Knob qty 2 YS 9916 Gray Knob qty 1 YS 89915 Red Knob qty 2 WIRING Z452A ef500p control KNOB COLORS 1v1 ai ...

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