YORKVILLE 50KW POWER WEDGE User manual

U.S.A.
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: [phone]
Fax: [phone]
WORLD HEADQUARTERS
CANADA
Yorkville Sound
550 Granite Court
Pickering, Ontario
L1W-3Y8 CANADA
Voice: [phone]
Fax: [phone]
Quality and Innovation Since 1963
Printed in Canada
WEB ACCESS: http://www.yorkville.com
SERVICE MANUAL
MANUEL DE SERVICE
KB
KW
Manual-Service-50kbkw-1v2-web.pdf

# Part# Description Function
1 4418 _10K 5C R/A 9MM HORIZONTAL P28 Gain 1
2 3450 1/4" JCK PCB MT HORZ GOLD Jack
3 3660 XLR FEML PCB MT HORZ Jack
4 4417 _10K 5B LIN 9MM HORIZONTAL P28 Gain 2
5 8459 9.5" STRAP HANDLE, PLASTIC COVERS Strap
6 3460 RCA DUAL PCB MT VERT GOLD .475" Jack
7 4420 _50K B LIN 9MM HORIZONTAL P28 Treble
8 4420 _50K B LIN 9MM HORIZONTAL P28 Bass
knob 8641 Note: All pots use 8641 Aqua Knob
9 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL
10 Z350 50KB Grille (special order while unit is in production only)
11 3834 HEYCO #1214 STRAIN RELIEF
12 8468 VELCRO STRAP 3/4"X22CM (VELSTRAP)
13 3481 8' 3/18 SJT AC LINE CORD 250 CLIPS
14 8547 PLASTIC FOOT BLACK
15 7322 10" 4R 50WPGM SPEAKER
16 7415 4R 30W TWEETER RADIAL MOTOROLA
1309 BLOC-40B/40K/40W/50B XFMR
6827 1N5402 200V 3A0 DIODE
6755 LM3876T IC 40 WATT POWER AMP
6840 MC33078P IC DUAL OP AMP
6882 TL072CP IC FET DUAL OP AMP
5887 2200U 50V 20%CAP BLK 18X27MM EL
2468 0.800 AMP SLO-BLO .25X1.25 FUSE
3830 TO218 PREGREASED MICA 56-78-2AP
6798 MC4741CP IC QUAD OP AMP
6827 1N5402 200V 3A0 DIODE
6840 MC33078P IC DUAL OP AMP
6882 TL072CP IC FET DUAL OP AMP
6889 TLO74CN IC QUAD O/A T.I ONLY
8581 CUSTOM PBL TRANSISTOR SPACER
Notes:
Labeled Components
Internal Electronic Components
applicable to serial numbers 001xxxx
parts-50kb.xls - 10/20/00 ftp.yorkville.com/parts Instrument Amplifiers
50kb parts.xls
YS No. Description Qty. YS No. Description Qty.
6408 GRN 3MM LED 1V9 5MA FROSTED 1 8749 10-32 X 1/2 QDX PH TAPTITE JS500 1
6438 1N4004 400V 1A0 DIODE T&R 1 3833 8 X 3/8 (250 OD,.171 ID)NY SPACER 3
6827 1N5402 200V 3A0 DIODE 4 3511 #6 FLAT WASHER NYLON 1
6824 1N5246B 16V0 0W5 ZENER 5% T&R 3 8473 #10 BLACK CUPWASHER SWF-10BK 1
6755 LM3876T IC 40 WATT POWER AMP 1 8817 #10 FLAT WASHER FOR 3/16" BOLT 2
6840 MC33078P IC DUAL OP AMP 1 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL 1
6882 TL072CP IC FET DUAL OP AMP 2 8468 VELCRO STRAP 3/4"X22CM (VELSTRAP) 1
5404 _27P 100V 10%CAP T&R BEAD NPO 1 1309 BLOC-40B/40K/40W/50B XFMR 1
5408 _47P 100V 10%CAP T&R BEAD NPO 3
5420 680P 50V 10%CAP T&R BEAD NPO 2
5422 __1N 50V 10%CAP T&R BEAD NPO 3
5424 __1N5 50V 10%CAP T&R BEAD Y5P 1
6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1
5376 __6N8 50V 5%CAP T&R BEAD X7R 1
6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1
5841 _47N 250V 10%CAP RAD POLYFILM BULK 1
5310 _68N 50V 10%CAP T&R BEAD X7R 1
5314 100N 50V 10%CAP T&R BEAD X7R 9
5317 180N 50V 10%CAP T&R BEAD X7R 1
5231 220N 63V 10%CAP T&R RAD .2"FLM 1
5256 __1U 63V 5%CAP T&R RAD .2"FLM 2
5257 __2U2 63V 20%CAP T&R RAD .2"EL 1
5259 __4U7 63V 20%CAP T&R RAD .2"EL 1
5281 _10U 16V 20%CAP T&R RAD .2"NP 1
5961 _33U 16V 20%CAP T&R RAD .2"NP 1
5267 100U 25V 20%CAP T&R RAD .2"EL 3
5879 100U 16V 20%CAP T&R 8X7MM .2"EL 1
5887 2200U 50V 20%CAP BLK 18X27MM EL 2
4417 _10K 5B LIN 9MM HORIZONTAL P28 1
4418 _10K 5C R/A 9MM HORIZONTAL P28 1
4420 _50K B LIN 9MM HORIZONTAL P28 2
3682 250 MALE PCB TAB BULK CARTRIGE 10
3498 1/4" JCK PCB MT HORZ 4
3523 1/4" JCK PCB MT HORZ GOLD T__ 1
3527 1/4" JCK PCB MT HORZ GOLD __S 1
3460 RCA DUAL PCB MT VERT GOLD .475" 1
3417 6-32 SCREW TERMINAL PC MOUNT 2
3660 XLR FEML PCB MT HORZ 1
3451 EYELET SMALL 0.089 OD PLATED 10
3414 INTERNATIONAL PC MOUNT FUSEHOLDER 2
2468 0.800 AMP SLO-BLO .25X1.25 FUSE 1
3563 TRANSISTOR MOUNTING BRACKET 1
3800 BELLY BUTTON #BB1 CORDS CANADA 1
3804 SNAP ON 1.5" INSULATING BUSHING 1
3795 #8 GROUND LUG ZIERICK 505-169 1
3810 4" NYLON CABLE TIE 5
8641 AQUA KNOB FOR "NEW" ACOUSTIC SERIE 4
3481 8' 3/18 SJT AC LINE CORD 250 CLIPS 1
3834 HEYCO #1214 STRAIN RELIEF 1
8800 6-32 KEPS NUT ZINC 9
8787 8-32 KEPS NUT ZINC 2
8898 1/4-20 CAGE NUT C7998142027 4
3830 TO218 PREGREASED MICA 56-78-2AP 1
4597 22AWG STRAN TC WIR JMP 10
4599 22AWG SOLID SC WIR T&R JMP 27
4666 1/2W 4R7 5% T&R RES 2
4675 1/2W 10R 5% T&R RES 2
4709 5.0W 22R 5% BLK RES 1
4692 5.0W 100R 5% BLK RES 1
4897 1/4W 120R 5% T&R RES 1
4821 1/4W 470R 5% T&R RES 1
4980 1/4W 470R 5%MINI T&R RES 4
4799 1/4W 562R 1% T&R RES 2
4823 1/4W 1K 5% T&R RES 2
4654 1/2W 1K2 5% T&R RES 2
4824 1/4W 1K5 5% T&R RES 1
4825 1/4W 1K8 5% T&R RES 2
4847 1/4W 2K2 5% T&R RES 1
4850 1/4W 3K9 5% T&R RES 1
4827 1/4W 4K7 5% T&R RES 4
4639 1/4W 4K99 1% T&R RES 4
4829 1/4W 10K 5% T&R RES 5
4983 1/4W 10K 5%MINI T&R RES 1
4830 1/4W 15K 5% T&R RES 1
6123 1/4W 20K0 1%MINI MF T&R RES 2
4833 1/4W 27K 5% T&R RES 1
4767 1/4W 36K0 1%FLAME PROOF T&R RES 2
4834 1/4W 47K 5% T&R RES 3
4838 1/4W 100K 5% T&R RES 2
4849 1/4W 180K 5% T&R RES 1
9150 .081" 48X96 UTILITY ALUMINUM 2.13
8842 #4 X 5/16 PAN QUAD TYPE A JS500 BLK 4
8801 6-32 X 3/8 PAN PH TAPTITE JS500 4
8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 2
8828 6-32 X 3/4 PAN PH TAPTITE JS500 5
8763 8-32 X 1/2 PAN PH MS JS500 BLACK 2

50kw parts.xls
YS No. Description Qty. YS No. Description Qty.
6408 GRN 3MM LED 1V9 5MA FROSTED 1 3833 8 X 3/8 (250 OD,.171 ID)NY SPACER 3
6438 1N4004 400V 1A0 DIODE T&R 1 3511 #6 FLAT WASHER NYLON 1
6827 1N5402 200V 3A0 DIODE 4 8473 #10 BLACK CUPWASHER SWF-10BK 1
6824 1N5246B 16V0 0W5 ZENER 5% T&R 3 8817 #10 FLAT WASHER FOR 3/16" BOLT 2
6755 LM3876T IC 40 WATT POWER AMP 1 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL 1
6840 MC33078P IC DUAL OP AMP 1 8468 VELCRO STRAP 3/4"X22CM (VELSTRAP) 1
6882 TL072CP IC FET DUAL OP AMP 2 1309 BLOC-40B/40K/40W/50B XFMR 1
5404 _27P 100V 10%CAP T&R BEAD NPO 2
5408 _47P 100V 10%CAP T&R BEAD NPO 2
5420 680P 50V 10%CAP T&R BEAD NPO 2
5422 __1N 50V 10%CAP T&R BEAD NPO 3
5428 __3N3 50V 10%CAP T&R BEAD Y5R 1
6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1
5376 __6N8 50V 5%CAP T&R BEAD X7R 1
6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1
5308 _47N 50V 10%CAP T&R BEAD X7R 1
5841 _47N 250V 10%CAP RAD POLYFILM BULK 1
5314 100N 50V 10%CAP T&R BEAD X7R 7
5316 150N 50V 10%CAP T&R BEAD X7R 1
5317 180N 50V 10%CAP T&R BEAD X7R 1
5231 220N 63V 10%CAP T&R RAD .2"FLM 1
5256 __1U 63V 5%CAP T&R RAD .2"FLM 2
5257 __2U2 63V 20%CAP T&R RAD .2"EL 1
5259 __4U7 63V 20%CAP T&R RAD .2"EL 1
5281 _10U 16V 20%CAP T&R RAD .2"NP 1
5961 _33U 16V 20%CAP T&R RAD .2"NP 1
5267 100U 25V 20%CAP T&R RAD .2"EL 3
5887 2200U 50V 20%CAP BLK 18X27MM EL 2
4417 _10K 5B LIN 9MM HORIZONTAL P28 1
4418 _10K 5C R/A 9MM HORIZONTAL P28 1
4420 _50K B LIN 9MM HORIZONTAL P28 2
3682 250 MALE PCB TAB BULK CARTRIGE 10
3498 1/4" JCK PCB MT HORZ 4
3523 1/4" JCK PCB MT HORZ GOLD T__ 1
3527 1/4" JCK PCB MT HORZ GOLD __S 1
3460 RCA DUAL PCB MT VERT GOLD .475" 1
3660 XLR FEML PCB MT HORZ 1
3451 EYELET SMALL 0.089 OD PLATED 10
3414 INTERNATIONAL PC MOUNT FUSEHOLDER 2
2468 0.800 AMP SLO-BLO .25X1.25 FUSE 1
3563 TRANSISTOR MOUNTING BRACKET 1
3800 BELLY BUTTON #BB1 CORDS CANADA 1
3804 SNAP ON 1.5" INSULATING BUSHING 1
3545 ANGLE BRACKET .5" X .5" X .5" 2
3795 #8 GROUND LUG ZIERICK 505-169 1
3810 4" NYLON CABLE TIE 5
8735 0.125 X 0.190 ALUMINUM RIVET 2
8641 AQUA KNOB FOR "NEW" ACOUSTIC SERIE 4
3481 8' 3/18 SJT AC LINE CORD 250 CLIPS 1
3834 HEYCO #1214 STRAIN RELIEF 1
8800 6-32 KEPS NUT ZINC 9
8787 8-32 KEPS NUT ZINC 2
8898 1/4-20 CAGE NUT C7998142027 4
3830 TO218 PREGREASED MICA 56-78-2AP 1
4597 22AWG STRAN TC WIR JMP 10
4599 22AWG SOLID SC WIR T&R JMP 28
4666 1/2W 4R7 5% T&R RES 2
4675 1/2W 10R 5% T&R RES 2
4709 5.0W 22R 5% BLK RES 1
4692 5.0W 100R 5% BLK RES 1
4897 1/4W 120R 5% T&R RES 1
4821 1/4W 470R 5% T&R RES 1
4980 1/4W 470R 5%MINI T&R RES 4
4799 1/4W 562R 1% T&R RES 2
4823 1/4W 1K 5% T&R RES 2
4654 1/2W 1K2 5% T&R RES 2
4824 1/4W 1K5 5% T&R RES 1
4825 1/4W 1K8 5% T&R RES 2
4864 1/4W 2K7 5% T&R RES 1
4827 1/4W 4K7 5% T&R RES 2
4639 1/4W 4K99 1% T&R RES 4
4829 1/4W 10K 5% T&R RES 6
4983 1/4W 10K 5%MINI T&R RES 1
4830 1/4W 15K 5% T&R RES 1
6123 1/4W 20K0 1%MINI MF T&R RES 2
4833 1/4W 27K 5% T&R RES 1
4767 1/4W 36K0 1%FLAME PROOF T&R RES 2
4834 1/4W 47K 5% T&R RES 3
4838 1/4W 100K 5% T&R RES 2
4849 1/4W 180K 5% T&R RES 1
9150 .081" 48X96 UTILITY ALUMINUM 2.2
8877 4-40 X 1/4 FILLISTER PH MS ZN 2
8842 #4 X 5/16 PAN QUAD TYPE A JS500 BLK 4
8801 6-32 X 3/8 PAN PH TAPTITE JS500 4
8828 6-32 X 3/4 PAN PH TAPTITE JS500 5
8763 8-32 X 1/2 PAN PH MS JS500 BLACK 2
8749 10-32 X 1/2 QDX PH TAPTITE JS500 1
Insert 50kw Parts/Picts here

SRT
EFX_RTN
GOLD_T
J91
2
3
4
5
6
SRT
PHONES
GOLD_S
J51
2
3
4
5
6
SRT
EFX_SEND
NO_GOLD
J81
2
3
4
5
6
3K9
R56
100U
25V
C28
#7322
10"
4RSPKR1
0.8A-SB
F1
40V
220N
C23 22R
5W
R52
1K
R20
15K
R22
10K
R21
100U
25V
C18
16V
1N5246B
ZD4
1K2
0.5W
R38
100N
C36
100N
C34 "P28"
STYLE
100N
C35
RCA
J4
1
2
1N5402
D4
1N5402
D3
100N
C33
RED
LD1 1K5
R35
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
D
D
APR/24/00
JAN/2000
V
V
V
V
V
V
V
V
1.00
1.P0
N
N
N
N
N
N
N
N
DELETE_D11->D14_C12_15P->27P
FIRST_PROTOTYPE_DERIVED_FROM_M512
50KB
M578.SCH_DATABASE_HISTORY
AS_OFKNOBPART#FUNCTIONREF
10
9
8
7
6
5
4
3
2
1
#
MODEL(S):-
D
D
D
D
D
D
.
.
.
JAN/2000
K
K
K
K
K
K
#8641
#8641
#8641
#8641
N
N
N
N
N
N
#4420
#4420
#4418
#4417
F
F
F
F
F
F
TREBLE
BASS
GAIN-1
GAIN-2
D
D
D
D
D
D
P4
P3
P2
P1
50KW
M578.PCB_POT_LIST
4R7
0.5W
R60
2200U
40V
C25
22n
C32
400V
10U
C17
2200U
40V
C26
SW1
120Vac
60Hz
#1309
T1
YORKVILLE NAME: PCB#&VER:
MODELS: SCH ISSUE:
TITLE:
DATE:
M578
50KB
M578.SCH
APR/24/2000
50KB_MIXER_AMP
1.00
SRT
LEFT/MONO
NO_GOLD
J1 1
2
3
4
5
6
.
180N
C40
16V
5246B
ZD3
4n7
C30
250V
16V
5246B
ZD2
1N5402
D2
1N5402
D1
10R
0.5W
R23
1K2
0.5W
R39 4R7
0.5W
R59
50V
1U
C22
LM3876
U4
9
10
37
1
5
48
2u2 16V
C20
1K8
R37
100U
16V
C7
680P
C16
100R
5W
R31
180K
R10
RCA
J3
1
2
470R
R2
470R
R1
470R
R27
100U
25V
C27
470R
R26
20K0
R29
1/2
33078
U2
6
57
120R
R9
1/2
33078
U2
2
31
4K99
R4
10K
R49
562R
R5
4K99
R7
562R
R6
4K99
R3
4K99
R8
CW
VOLUME1
10K
5C P2
1N
C4
100N
C2
NUTRIX
MIC_IN
J6
13
2
SRT
MONO
NO_GOLD
J7 1
2
3
4
5
6
1N
C5
470R
R51
1/2
TLO72
U1
2
31
4U7 16V
C9
100N
C3
47P
C19
1/2
TLO72
U3
2
31
36K0
R32
100Vac
50Hz
#1209J
20K0
R28
T400mA
#7415
3.75"
4R
SPKR2
22n
400V
100N
C10
1N
C11
230Vac
50Hz
#1206
CW
VOLUME2
B
1OK
P1
NC
V_IN+ V_IN- MUTE
GND
NC
NC(+)
V-
OUTPUT
NC
V+
11 10
9 8 7 6 5 4 3 2 1
LM3876T
1K8
R36
2K2
R58
100N
C39 4K7
R57
10R
0.5W
R25
68N
C14
47K
R14
4K7
R45
4K7
R46
680P
C15
47K
R15
1K
R48
47K
R47
33U 16V
C6
CW
BASS
50K
BP3
CW
TREBLE
50K
BP4
4K7
R50
27P
C12
SRT
RIGHT
NO_GOLD
J2 1
2
3
4
5
6100N
C38
6N8
C37
10K
R54
10K
R55
1N4004
D5
10K
R12
100K
R13
47P
C1
1N5
C13
47p
C8
100K
R44
10K
R11
27K
R43
1/2
TLO72
U1
6
57
36K0
R30
1/2
TLO72
U3
6
57
50V
1U
C21
IG
IG
AG
AG
AG
AG
AG AG
AG
AG
AG
AG AG
-35VDC
-35VDC
+35VDC
+35VDC
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
-16V
-16V
-16V
+16V
+16V
+16V
EXPORT FOR JAPAN
PIN 1
F1
SW1
C32
T1
EXPORT
GRN/YEL
BROWN
BLUE
POLY
POLY
POLY
NOTE: ALL UNMARKED DIODES 1N4148
WHITE GREEN BLACK
CHANNEL 2
INPUT
INPUT
CHANNEL 1

VCD
SHEAR SHEAR
M578-1.00
C28
25V
100U
C27
25V
100U
C9 16V
4U7
R11
10K
C376N8
C38100N
C12 27P
C111N
C14
68N
C10100N
C3 100n
C51N
C2
100n
C41N
C35 100N
C34100N
C847P
C15680P
R1447K
C13 1N5
R4327K
R44100K
R5510K R5410K
R50 4K7
R4747K
R481K J31
R22
15K
R464K7
R454K7
R371K8
R351K5
R361K8
J18
R84K99
R34K99
R6 562R
R74K99
R5 562R
R49
10K
R13100K
R44K99
R9 120R
R27470R R2470R
R10180K
R21
10K
R563K9
R20 1K
TAB9
.
FUNCTION
TAB2
.
.
TAB4
.
.
TAB1
250TAB
.
TAB3
.
.
TAB10
.
FUNCTION
TAB8
.
FUNCTION
TAB7
.
SEC_IN
TAB6 .
SEC_IN
TAB5
.
SEC_GND
R38
0.5W
1K2
R39
0.5W
1K2
R31
5W
100R
R52
5W
22R
DOWN
BAR
D1
1N5402
DOWN
BAR
D2
1N5402
DOWN
BAR
D3
1N5402
DOWN
BAR
D4
1N5402
ZD2
16V
ZD3
16V
ZD4
16V
WHT RED
JB4
#3460
C39 100N
J21
RTV
RTV
F10.8A-SB #3414AC_LINE
U1
TLO72
U2 33078
U3
TLO72
-
+
LED1
GRN
R1 470R
R57 4K7
RTV
J12
J30
J5
J9
J20
J22
J11
J27
R29 20K0
J10
J19
C16680P
R12
10K
KNOBPART#FUNCTIONREF
MODEL(S):- AS_OF
F
F
TREBLE
BASS
GAIN-1
GAIN-2
P
P
#4420
#4420
#4418
#4417
N
N
.
.
.
JAN/2000
K
K
#8641
#8641
#8641
#8641
R
R
P4
P3
P2
P1
50KB-50KW
M578.PCB_POT_LIST
JB9
EFX-RTN
JB5
PHONE
JB2
RIGHT
JB7 MONO-IN-1 JB1 LEFT-MONO
JB8
EFX-SEND
P28
STYLE
$$2
J35
C22
1U
C30
4N7
250V
C32 22N
400V
R28 20K0
J16
R58 2K2
C36
100n
D5
1N4004
J8
J17
C18
25V
100U
TOP
WIP
BOT
P4
B
50K
PT#4420
TREBLE
TOP
WIP
BOT
P3
B
50K
PT#4420
BASS
TOP
WIP
BOT
P1
5B
10K
PT#4417
GAIN-2
J6 J4 J7
J1 J2 J3
WC6
R1547K
C23 220N
J32
C25
2200U
50V
C26
2200U
50V
R23
0.5W
10R
C211U
R25
0.5W
10R
C7
16V
100U J29
J26
C6
33u
16V
R3236K0
J14
R26
470R
R30 36K0
C1947P
C20 63V
2u2
11
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
D
APR/20/00
APR/2000
.
JAN/2000
V
V
V
V
V
V
V
10P3
1.0P2
.
1.P0
N
N
N
N
N
N
N
DELETE_D11->D14_C12_15P->27P
GROUNDS_UPDATED_RCA_JKS_WIRES->JMPR
POTS_CHANGED_TO_STYLE_28
PC#____DERIVED_FROM_M512
50KB
M578.PCB_DATABASE_HISTORY
TOP
WIP
BOT
P2
5C
10K
PT#4418
GAIN-1
WC3
CSA-0.8A/240V
CE-T400MA
WC1
C33100N
R60
0.5W
4R7
RTV
RTV
RTV
PART#
SWITCH
R59
0.5W
4R7
WC2
C17
10u
16V
C40
180N
J28
R51
470R
.
PART#3660
U4
.
#6755
LM38x6
47N
250V
J23
J13
J25 J24
C1
47P
J33
J34
J15
N.B
AC HOT AC RET
WHITE
TWEET(-)
GRN
GRN
PRIM
TRANS
REDBLACK
GOLD-SLV
SPKR(+)
SPKR(-)
PRIM
TRANS
GOLD-TIP
USE T400MA #2462 FUSE
PRODUCTION NOTES
TO CHASSIS GND
4" GREEN
12" GREEN
ADD RTV TO ALL .2 SPACING ELECTROLYTIC CAPACITORS
4
3
2
1
TWO LEGS OF ALL PHONE JACKS MUST BE BENT FLAT TO THE PCB BEFORE SOLDERING
THIS SYMBOL INDICATES WHERE RTV IS TO BE USED BETWEEN THE COMPONENT AND THE PCB
.
BEND
BEND
PCB
JACK LEG
SOLDER
LED GREEN
FOR S VERSION
FOR S VERSION
DO NOT STUFF C30
DO NOT STUFF C30
WC6 GRN/YELL WIRE FOR S VERSION
WC6 GRN/YELL WIRE FOR S VERSION
WC2 NO WIRE FOR S VERSION
WC2 NO WIRE FOR S VERSION
GREEN WIRES FOR N.A.
GREEN WIRES FOR N.A.
WC2 AND WC6
WC2 AND WC6
BLACK DOUBLE/INSUL. FOR S
BLACK DOUBLE/INSUL. FOR S
BLACK 18AWG WIRES FOR N.A.
BLACK 18AWG WIRES FOR N.A.
WC1 AND WC3
WC1 AND WC3
FOR S VERSION
VER 1.00
50KB
M578
BLUE WHITE
RED
BLACK
PT#7415PT#7322
P:\578V10.PRN

SRT
EFX_RTN
GOLD_T
J91
2
3
4
5
6
SRT
PHONES
GOLD_S
J51
2
3
4
5
6
SRT
EFX_SEND
NO_GOLD
J81
2
3
4
5
6
2K7
R56
100U
25V
C28
#7322
10"
4RSPKR1
0.8A-SB
F1
40V
220N
C23 22R
5W
R52
1K
R20
15K
R22
10K
R21
100U
25V
C18
16V
1N5246B
ZD4
1K2
0.5W
R38
100N
C36
100N
C34 "P28"
STYLE
100N
C35
RCA
J4
1
2
1N5402
D4
1N5402
D3
100N
C33
RED
LD1 1K5
R35
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
.
MAY/15/00
APR/24/00
JAN/2000
V
V
V
V
V
V
.
1.10
1.00
1.P0
N
N
N
N
N
N
C14->47N
PC#6253_C38_100N->150N_R56->2K7
DELETE_D11->D14_C12_15P->27P
FIRST_PROTOTYPE_DERIVED_FROM_M512
50KW
M578A.SCH_DATABASE_HISTORY
AS_OFKNOBPART#FUNCTIONREF
10
9
8
7
6
5
4
3
2
1
#
MODEL(S):-
D
D
D
D
D
D
.
.
.
JAN/2000
K
K
K
K
K
K
#8641
#8641
#8641
#8641
N
N
N
N
N
N
#4420
#4420
#4418
#4417
F
F
F
F
F
F
TREBLE
BASS
GAIN-1
GAIN-2
D
D
D
D
D
D
P4
P3
P2
P1
50KW
M578A.PCB_POT_LIST
4R7
0.5W
R60
2200U
40V
C25
22n
C32
400V
10U
C17
2200U
40V
C26
SW1
120Vac
60Hz
#1309
T1
YORKVILLE NAME: PCB#&VER:
MODELS: SCH ISSUE:
TITLE:
DATE:
M578A
50KW
M578A.SCH
MAY/15/2000
50KW_MIXER_AMP
1.10
SRT
LEFT/MONO
NO_GOLD
J1 1
2
3
4
5
6
.
180N
C40
16V
5246B
ZD3
4n7
C30
250V
16V
5246B
ZD2
1N5402
D2
1N5402
D1
10R
0.5W
R23
1K2
0.5W
R39 4R7
0.5W
R59
50V
1U
C22
LM3876
U4
9
10
37
1
5
48
2u2 16V
C20
1K8
R37
100U
16V
C7
680P
C16
100R
5W
R31
180K
R10
RCA
J3
1
2
470R
R2
470R
R1
470R
R27
100U
25V
C27
470R
R26
20K0
R29
1/2
33078
U2
6
57
120R
R9
1/2
33078
U2
2
31
4K99
R4
10K
R49
562R
R5
4K99
R7
562R
R6
4K99
R3
4K99
R8
CW
VOLUME1
10K
5C P2
1N
C4
100N
C2
NUTRIX
MIC_IN
J6
13
2
SRT
MONO
NO_GOLD
J7 1
2
3
4
5
6
1N
C5
470R
R51
1/2
TLO72
U1
2
31
4U7 16V
C9
100N
C3
47P
C19
1/2
TLO72
U3
2
31
36K0
R32
100Vac
50Hz
#1209J
20K0
R28
T400mA
#7415
3.75"
4R
SPKR2
22n
400V
100N
C10
1N
C11
230Vac
50Hz
#1206
CW
VOLUME2
B
1OK
P1
NC
V_IN+ V_IN- MUTE
GND
NC
NC(+)
V-
OUTPUT
NC
V+
11 10
9 8 7 6 5 4 3 2 1
LM3876T
1K8
R36
10R
0.5W
R25
47N
C14
47K
R14
4K7
R45
4K7
R46
680P
C15
47K
R15
1K
R48
47K
R47
33U 16V
C6
CW
BASS
50K
BP3
CW
TREBLE
50K
BP4
10K
R50
27P
C12
SRT
RIGHT
NO_GOLD
J2 1
2
3
4
5
6150N
C38
6N8
C37
10K
R54
10K
R55
1N4004
D5
10K
R12
100K
R13
47P
C1
3N3
C13
47p
C8
100K
R44
10K
R11
27K
R43
1/2
TLO72
U1
6
57
36K0
R30
1/2
TLO72
U3
6
57
50V
1U
C21
IG
IG
AG
AG
AG
AG
AG AG
AG
AG
AG
AG AG
-35VDC
-35VDC
+35VDC
+35VDC
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
-16V
-16V
-16V
+16V
+16V
+16V
EXPORT FOR JAPAN
PIN 1
F1
SW1
C32
T1
EXPORT
GRN/YEL
BROWN
BLUE
POLY
POLY
POLY
NOTE: ALL UNMARKED DIODES 1N4148
WHITE GREEN
BLACK
CHANNEL 2
INPUT
INPUT
CHANNEL 1

VCD
SHEAR SHEAR
M578-1.00
C28
25V
100U
C27
25V
100U
C9 16V
4U7
R11
10K
C376N8
C38150N
C12 27P
C111N
C14
47N
C10100N
C3 100n
C51N
C2
100n
C41N
C35 100N
C34100N
C827P
C15680P
R1447K
C13 3N3
R4327K
R44100K
R5510K R5410K
R50 10K
R4747K
R481K J31
R22
15K
R464K7
R454K7
R371K8
R351K5
R361K8
J18
R84K99
R34K99
R6 562R
R74K99
R5 562R
R49
10K
R13100K
R44K99
R9 120R
R27470R R2470R
R10180K
R21
10K
R562K7
R20 1K
TAB9
.
FUNCTION
TAB2
.
.
TAB4
.
.
TAB1
250TAB
.
TAB3
.
.
TAB10
.
FUNCTION
TAB8
.
FUNCTION
TAB7
.
SEC_IN
TAB6 .
SEC_IN
TAB5
.
SEC_GND
R38
0.5W
1K2
R39
0.5W
1K2
R31
5W
100R
R52
5W
22R
DOWN
BAR
D1
1N5402
DOWN
BAR
D2
1N5402
DOWN
BAR
D3
1N5402
DOWN
BAR
D4
1N5402
ZD2
16V
ZD3
16V
ZD4
16V
WHT RED
JB4
#3460
J21
RTV
RTV
F10.8A-SB #3414AC_LINE
U1
TLO72
U2 33078
U3
TLO72
-
+
LED1
GRN
R1 470R
RTV
J12
J30
J5
J9
J20
J22
J11
J27
R29 20K0
J10
J19
C16680P
R12
10K
KNOBPART#FUNCTIONREF
MODEL(S):- AS_OF
F
F
TREBLE
BASS
GAIN-1
GAIN-2
P
P
#4420
#4420
#4418
#4417
N
N
.
.
.
JAN/2000
K
K
#8641
#8641
#8641
#8641
R
R
P4
P3
P2
P1
50KB-50KW
M578.PCB_POT_LIST
JB9
EFX-RTN
JB5
PHONE
JB2
RIGHT
JB7 MONO-IN-1 JB1 LEFT-MONO
JB8
EFX-SEND
P28
STYLE
$$2
J35
C22
1U
C30
4N7
250V
C32 22N
400V
R28 20K0
J16
C36
100n
D5
1N4004
J8
J17
C18
25V
100U
TOP
WIP
BOT
P4
B
50K
PT#4420
TREBLE
TOP
WIP
BOT
P3
B
50K
PT#4420
BASS
TOP
WIP
BOT
P1
5B
10K
PT#4417
GAIN-2
J6 J4 J7
J1 J2 J3
WC6
R1547K
C23 220N
J32
C25
2200U
50V
C26
2200U
50V
R23
0.5W
10R
C211U
R25
0.5W
10R
C7
16V
100U J29
J26
$$4
C6
33u
16V
R3236K0
J14
R26
470R
R30 36K0
C1947P
C20 63V
2u2
11
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
D
APR/20/00
APR/2000
.
JAN/2000
V
V
V
V
V
V
V
10P3
1.0P2
.
1.P0
N
N
N
N
N
N
N
DELETE_D11->D14_C12_15P->27P
GROUNDS_UPDATED_RCA_JKS_WIRES->JMPR
POTS_CHANGED_TO_STYLE_28
PC#____DERIVED_FROM_M512
50KB
M578.PCB_DATABASE_HISTORY
TOP
WIP
BOT
P2
5C
10K
PT#4418
GAIN-1
WC3
CSA-0.8A/240V
CE-T400MA
WC1
C33100N
R60
0.5W
4R7
RTV
RTV
RTV
PART#
SWITCH
R59
0.5W
4R7
WC2
C17
10u
16V
C40
180N
J28
R51
470R
.
PART#3660
U4
.
#6755
LM38x6
47N
250V
J23
J13
J25 J24
C1
47P
J33
J34
J15
N.B
AC HOT AC RET
WHITE
TWEET(-)
GRN
GRN
PRIM
TRANS
REDBLACK
GOLD-SLV
SPKR(+)
SPKR(-)
PRIM
TRANS
GOLD-TIP
USE T400MA #2462 FUSE
PRODUCTION NOTES
TO CHASSIS GND
4" GREEN
12" GREEN
ADD RTV TO ALL .2 SPACING ELECTROLYTIC CAPACITORS
4
3
2
1
TWO LEGS OF ALL PHONE JACKS MUST BE BENT FLAT TO THE PCB BEFORE SOLDERING
THIS SYMBOL INDICATES WHERE RTV IS TO BE USED BETWEEN THE COMPONENT AND THE PCB
.
BEND
BEND
PCB
JACK LEG
SOLDER
LED GREEN
FOR S VERSION
FOR S VERSION
DO NOT STUFF C30
DO NOT STUFF C30
WC6 GRN/YELL WIRE FOR S VERSION
WC6 GRN/YELL WIRE FOR S VERSION
WC2 NO WIRE FOR S VERSION
WC2 NO WIRE FOR S VERSION
GREEN WIRES FOR N.A.
GREEN WIRES FOR N.A.
WC2 AND WC6
WC2 AND WC6
BLACK DOUBLE/INSUL. FOR S
BLACK DOUBLE/INSUL. FOR S
BLACK 18AWG WIRES FOR N.A.
BLACK 18AWG WIRES FOR N.A.
WC1 AND WC3
WC1 AND WC3
FOR S VERSION
VER 1.00
NO PART
NO PART
50KW
M578A
BLUE WHITE
RED
BLACK
PT#7415PT#7322
P:\578AV10.PRN

LINE CORD
4" BLACK DBL/INS
50KB /50KW EXPORT AC WIRING May 25, 2000
#8486 LOCKWAS ER
C ASSIS
1309
4" BLACK DBL/INS

Block Diagram for 50KB
AMP
Tweeter
8 ohms
Woofer
8 o hms
XLR Balanced
Stereo 1/4 inch
Input 1 Gain Pot
Input 2 Volume
Pot
EQ
In 1
In 2
BLOCK-DIAGRAM-50KB-5V0 .ai
EFX ReturnEFX Send
Channel Inputs
Speaker & Headphone
Outputs
Balanced Effects Loop
Low / High
DESIGNED AND MANUFACTURED BY YORKVILLE SOUND
Left/Mono Balanced
Right Balanced
RCA
Stereo
Contour Filter
Phones
Gain 2
Buffer
+15V Phantom Power
Mono Balanced
Stereo 1/4 inch
Stereo 1/4 inch
*Only available after SER# 308XXXX
C:\ADATA\block diagrams\BLOCK-DIAGRAM-50KB-5V0.ai
17-JUL-2003
SE