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SERVICE MANUAL
MANUEL DE SERVICE
WEB ACCESS: http://www.yorkville.com
WORLD HEADQUARTERS CANADA Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA Voice: (905) 837-8481 Fax: (905) 837-8746
U.S.A. Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA Voice: (716) 297-2920 Fax: (716) 297-3689
KW
KB
Quality and Innovation Since 1963
Printed in Canada
Manual-Service-50kbkw-1v2-web.pdf
#
1 2
Part#
4418 3450 3660 4417 8459 3460 4420 4420 8641 3698 Z350 3834 8468 3481 8547 7322 7415
Description
Function
Gain 1 Jack Jack Gain 2 Strap Jack Treble Bass
YS No. 6408 6438 6827 6824 6755 6840 6882 5404 5408 5420 5422 5424 6451 5376 6435 5841 5310 5314 5317 5231 5256 5257 5259 5281 5961 5267 5879 5887 4417 4418 4420 3682 3498 3523 3527 3460 3417 3660 3451 3414 2468 3563 3800 3804 3795 3810 8641 3481 3834 8800 8787 8898 3830 4597 4599 4666 4675 4709 4692 4897 4821 4980 4799 4823 4654 4824 4825 4847 4850 4827 4639 4829 4983 4830 6123 4833 4767 4834 4838 4849 9150 8842 8801 8829 8828 8763 Description GRN 3MM LED 1V9 5MA FROSTED 1N4004 400V 1A0 DIODE T&R 1N5402 200V 3A0 DIODE 1N5246B 16V0 0W5 ZENER 5% T&R LM3876T IC 40 WATT POWER AMP MC33078P IC DUAL OP AMP TL072CP IC FET DUAL OP AMP _27P 100V 10%CAP T&R BEAD NPO _47P 100V 10%CAP T&R BEAD NPO 680P 50V 10%CAP T&R BEAD NPO __1N 50V 10%CAP T&R BEAD NPO __1N5 50V 10%CAP T&R BEAD Y5P __4N7 250V 20%CAP BLK 'Y' 10MM AC __6N8 50V 5%CAP T&R BEAD X7R _22N 275V 20%CAP BLK 'X2' 15MM AC _47N 250V 10%CAP RAD POLYFILM BULK _68N 50V 10%CAP T&R BEAD X7R 100N 50V 10%CAP T&R BEAD X7R 180N 50V 10%CAP T&R BEAD X7R 220N 63V 10%CAP T&R RAD .2"FLM __1U 63V 5%CAP T&R RAD .2"FLM __2U2 63V 20%CAP T&R RAD .2"EL __4U7 63V 20%CAP T&R RAD .2"EL _10U 16V 20%CAP T&R RAD .2"NP _33U 16V 20%CAP T&R RAD .2"NP 100U 25V 20%CAP T&R RAD .2"EL 100U 16V 20%CAP T&R 8X7MM .2"EL 2200U 50V 20%CAP BLK 18X27MM EL _10K 5B LIN 9MM HORIZONTAL P28 _10K 5C R/A 9MM HORIZONTAL P28 _50K B LIN 9MM HORIZONTAL P28 250 MALE PCB TAB BULK CARTRIGE 1/4" JCK PCB MT HORZ 1/4" JCK PCB MT HORZ GOLD T__ 1/4" JCK PCB MT HORZ GOLD __S RCA DUAL PCB MT VERT GOLD .475" 6-32 SCREW TERMINAL PC MOUNT XLR FEML PCB MT HORZ EYELET SMALL 0.089 OD PLATED INTERNATIONAL PC MOUNT FUSEHOLDER 0.800 AMP SLO-BLO .25X1.25 FUSE TRANSISTOR MOUNTING BRACKET BELLY BUTTON #BB1 CORDS CANADA SNAP ON 1.5" INSULATING BUSHING #8 GROUND LUG ZIERICK 505-169 4" NYLON CABLE TIE AQUA KNOB FOR "NEW" ACOUSTIC SERIE 8' 3/18 SJT AC LINE CORD 250 CLIPS HEYCO #1214 STRAIN RELIEF 6-32 KEPS NUT ZINC 8-32 KEPS NUT ZINC 1/4-20 CAGE NUT C7998142027 TO218 PREGREASED MICA 56-78-2AP 22AWG STRAN TC WIR JMP 22AWG SOLID SC WIR T&R JMP 1/2W 4R7 5% T&R RES 1/2W 10R 5% T&R RES 5.0W 22R 5% BLK RES 5.0W 100R 5% BLK RES 1/4W 120R 5% T&R RES 1/4W 470R 5% T&R RES 1/4W 470R 5%MINI T&R RES 1/4W 562R 1% T&R RES 1/4W 1K 5% T&R RES 1/2W 1K2 5% T&R RES 1/4W 1K5 5% T&R RES 1/4W 1K8 5% T&R RES 1/4W 2K2 5% T&R RES 1/4W 3K9 5% T&R RES 1/4W 4K7 5% T&R RES 1/4W 4K99 1% T&R RES 1/4W 10K 5% T&R RES 1/4W 10K 5%MINI T&R RES 1/4W 15K 5% T&R RES 1/4W 20K0 1%MINI MF T&R RES 1/4W 27K 5% T&R RES 1/4W 36K0 1%FLAME PROOF T&R RES 1/4W 47K 5% T&R RES 1/4W 100K 5% T&R RES 1/4W 180K 5% T&R RES .081" 48X96 UTILITY ALUMINUM #4 X 5/16 PAN QUAD TYPE A JS500 BLK 6-32 X 3/8 PAN PH TAPTITE JS500 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 6-32 X 3/4 PAN PH TAPTITE JS500 8-32 X 1/2 PAN PH MS JS500 BLACK
Labeled Components
_10K 5C R/A 9MM HORIZONTAL P28 1/4" JCK PCB MT HORZ GOLD XLR FEML PCB MT HORZ _10K 5B LIN 9MM HORIZONTAL P28 9.5" STRAP HANDLE, PLASTIC COVERS RCA DUAL PCB MT VERT GOLD .475" _50K B LIN 9MM HORIZONTAL P28 _50K B LIN 9MM HORIZONTAL P28 Note: All pots use 8641 Aqua Knob SPST ROKR SW QUIK 180" AC PWR BL/BL 50KB Grille (special order while unit is in production only) HEYCO #1214 STRAIN RELIEF VELCRO STRAP 3/4"X22CM (VELSTRAP) 8' 3/18 SJT AC LINE CORD 250 CLIPS PLASTIC FOOT BLACK 10" 4R 50WPGM SPEAKER 4R 30W TWEETER RADIAL MOTOROLA
50kb parts.xls
Qty. 1 1 4 3 1 1 2 1 3 2 3 1 1 1 1 1 1 9 1 1 2 1 1 1 1 3 1 2 1 1 2 10 4 1 1 1 2 1 10 2 1 1 1 1 1 5 4 1 1 9 2 4 1 10 27 2 2 1 1 1 1 4 2 2 2 1 2 1 1 4 4 5 1 1 2 1 2 3 2 1 2.13 4 4 2 5 2 YS No. 8749 3833 3511 8473 8817 3698 8468 1309 Description 10-32 X 1/2 QDX PH TAPTITE JS500 8 X 3/8 (250 OD,.171 ID)NY SPACER #6 FLAT WASHER NYLON #10 BLACK CUPWASHER SWF-10BK #10 FLAT WASHER FOR 3/16" BOLT SPST ROKR SW QUIK 180" AC PWR BL/BL VELCRO STRAP 3/4"X22CM (VELSTRAP) BLOC-40B/40K/40W/50B XFMR Qty. 1 3 1 1 2 1 1 1
applicable to serial numbers 001xxxx
3 4 5 6 7 8 knob 9 10 11 12 13 14 15 16
Internal Electronic Components
1309 6827 6755 6840 6882 5887 2468 3830 6798 6827 6840 6882 6889 8581 BLOC-40B/40K/40W/50B 1N5402 200V 3A0 DIODE LM3876T TL072CP IC 40 WATT POWER AMP IC FET DUAL OP AMP MC33078P IC DUAL OP AMP 2200U 50V 20%CAP BLK 18X27MM EL 0.800 AMP SLO-BLO .25X1.25 FUSE TO218 PREGREASED MICA 56-78-2AP MC4741CP IC QUAD OP AMP 1N5402 200V 3A0 DIODE MC33078P IC DUAL OP AMP TL072CP TLO74CN IC FET DUAL OP AMP IC QUAD O/A T.I ONLY XFMR
CUSTOM PBL TRANSISTOR SPACER
Notes:
parts-50kb.xls - 10/20/00
ftp.yorkville.com/parts
Instrument Amplifiers
50kw parts.xls
YS No. 6408 6438 6827 6824 6755 6840 6882 5404 5408 5420 5422 5428 6451 5376 6435 5308 5841 5314 5316 5317 5231 5256 5257 5259 5281 5961 5267 5887 4417 4418 4420 3682 3498 3523 3527 3460 3660 3451 3414 2468 3563 3800 3804 3545 3795 3810 8735 8641 3481 3834 8800 8787 8898 3830 4597 4599 4666 4675 4709 4692 4897 4821 4980 4799 4823 4654 4824 4825 4864 4827 4639 4829 4983 4830 6123 4833 4767 4834 4838 4849 9150 8877 8842 8801 8828 8763 8749 Description GRN 3MM LED 1V9 5MA FROSTED 1N4004 400V 1A0 DIODE T&R 1N5402 200V 3A0 DIODE 1N5246B 16V0 0W5 ZENER 5% T&R LM3876T IC 40 WATT POWER AMP MC33078P IC DUAL OP AMP TL072CP IC FET DUAL OP AMP _27P 100V 10%CAP T&R BEAD NPO _47P 100V 10%CAP T&R BEAD NPO 680P 50V 10%CAP T&R BEAD NPO __1N 50V 10%CAP T&R BEAD NPO __3N3 50V 10%CAP T&R BEAD Y5R __4N7 250V 20%CAP BLK 'Y' 10MM AC __6N8 50V 5%CAP T&R BEAD X7R _22N 275V 20%CAP BLK 'X2' 15MM AC _47N 50V 10%CAP T&R BEAD X7R _47N 250V 10%CAP RAD POLYFILM BULK 100N 50V 10%CAP T&R BEAD X7R 150N 50V 10%CAP T&R BEAD X7R 180N 50V 10%CAP T&R BEAD X7R 220N 63V 10%CAP T&R RAD .2"FLM __1U 63V 5%CAP T&R RAD .2"FLM __2U2 63V 20%CAP T&R RAD .2"EL __4U7 63V 20%CAP T&R RAD .2"EL _10U 16V 20%CAP T&R RAD .2"NP _33U 16V 20%CAP T&R RAD .2"NP 100U 25V 20%CAP T&R RAD .2"EL 2200U 50V 20%CAP BLK 18X27MM EL _10K 5B LIN 9MM HORIZONTAL P28 _10K 5C R/A 9MM HORIZONTAL P28 _50K B LIN 9MM HORIZONTAL P28 250 MALE PCB TAB BULK CARTRIGE 1/4" JCK PCB MT HORZ 1/4" JCK PCB MT HORZ GOLD T__ 1/4" JCK PCB MT HORZ GOLD __S RCA DUAL PCB MT VERT GOLD .475" XLR FEML PCB MT HORZ EYELET SMALL 0.089 OD PLATED INTERNATIONAL PC MOUNT FUSEHOLDER 0.800 AMP SLO-BLO .25X1.25 FUSE TRANSISTOR MOUNTING BRACKET BELLY BUTTON #BB1 CORDS CANADA SNAP ON 1.5" INSULATING BUSHING ANGLE BRACKET .5" X .5" X .5" #8 GROUND LUG ZIERICK 505-169 4" NYLON CABLE TIE 0.125 X 0.190 ALUMINUM RIVET AQUA KNOB FOR "NEW" ACOUSTIC SERIE 8' 3/18 SJT AC LINE CORD 250 CLIPS HEYCO #1214 STRAIN RELIEF 6-32 KEPS NUT ZINC 8-32 KEPS NUT ZINC 1/4-20 CAGE NUT C7998142027 TO218 PREGREASED MICA 56-78-2AP 22AWG STRAN TC WIR JMP 22AWG SOLID SC WIR T&R JMP 1/2W 4R7 5% T&R RES 1/2W 10R 5% T&R RES 5.0W 22R 5% BLK RES 5.0W 100R 5% BLK RES 1/4W 120R 5% T&R RES 1/4W 470R 5% T&R RES 1/4W 470R 5%MINI T&R RES 1/4W 562R 1% T&R RES 1/4W 1K 5% T&R RES 1/2W 1K2 5% T&R RES 1/4W 1K5 5% T&R RES 1/4W 1K8 5% T&R RES 1/4W 2K7 5% T&R RES 1/4W 4K7 5% T&R RES 1/4W 4K99 1% T&R RES 1/4W 10K 5% T&R RES 1/4W 10K 5%MINI T&R RES 1/4W 15K 5% T&R RES 1/4W 20K0 1%MINI MF T&R RES 1/4W 27K 5% T&R RES 1/4W 36K0 1%FLAME PROOF T&R RES 1/4W 47K 5% T&R RES 1/4W 100K 5% T&R RES 1/4W 180K 5% T&R RES .081" 48X96 UTILITY ALUMINUM 4-40 X 1/4 FILLISTER PH MS ZN #4 X 5/16 PAN QUAD TYPE A JS500 BLK 6-32 X 3/8 PAN PH TAPTITE JS500 6-32 X 3/4 PAN PH TAPTITE JS500 8-32 X 1/2 PAN PH MS JS500 BLACK 10-32 X 1/2 QDX PH TAPTITE JS500 Qty. 1 1 4 3 1 1 2 2 2 2 3 1 1 1 1 1 1 7 1 1 1 2 1 1 1 1 3 2 1 1 2 10 4 1 1 1 1 10 2 1 1 1 1 2 1 5 2 4 1 1 9 2 4 1 10 28 2 2 1 1 1 1 4 2 2 2 1 2 1 2 4 6 1 1 2 1 2 3 2 1 2.2 2 4 4 5 2 1 YS No. 3833 3511 8473 8817 3698 8468 1309 Description 8 X 3/8 (250 OD,.171 ID)NY SPACER #6 FLAT WASHER NYLON #10 BLACK CUPWASHER SWF-10BK #10 FLAT WASHER FOR 3/16" BOLT SPST ROKR SW QUIK 180" AC PWR BL/BL VELCRO STRAP 3/4"X22CM (VELSTRAP) BLOC-40B/40K/40W/50B XFMR Qty. 3 1 1 2 1 1 1
w 0k 5 rt se In
re he s ict /P ts r Pa
M578.PCB_POT_LIST
C33 +16V -16V C2 100N C3 100N SG 10K VOLUME1 R3 4K99 R4 J7 1 MONO
S
C35 100N C36 100N SG
+16V
MODEL(S):# REF
1 2 3 4 5 6 7 8 9 10 P1 P2 P3 P4 D D D D D D
50KW FUNCTION
GAIN-2 GAIN-1 BASS TREBLE F F F F F F
PART#
#4417 #4418 #4420 #4420 N N N N N N
KNOB
#8641 #8641 #8641 #8641 K K K K K K
AS_OF
JAN/2000 . . . D D D D D D
100N C34 100N
-16V
STYLE "P28"
J6 2 MIC_IN 3 NUTRIX 1 IG CHANNEL 1 INPUT 3
R
R5 562R 2 3 R6 562R R26
C4 1N R7 4K99 1 U2
1/2
CW
5C P2 120R R9 33U C6 16V 6 7 5 U2
1/2
R10 180K
C7 16V 100U
R43 27K R11 10K 6 5
C8 47p R44 100K 7 U1
1/2
R45 4K7 4U7 C9 16V BASS TREBLE B P4
CW
C10 100N 50K
CW
R46 C12 27P 1 3 U3
1/2
B P3 R47 4K7 47K C11 1N R48 1K 2
PIN 1
5
T
4K99
33078 R8 4K99 C5 1N J3 2 RCA 1 1 RCA 2 R15 47K R30 36K0
LM3876T
10 V_IN+ 11 NC 4 5 6 7 GND 8 MUTE 9 V_IN-
1
NO_GOLD 2
4
6 470R R1
33078 SG SG
TLO72
50K SG
TLO72
J1 1 LEFT/MONO
S
3
R
5
T
470R
R50 2u2 C20 16V R54 10K C38 R14 47K R28 20K0 R29 20K0 2 1 3 U1
1/2
C13 1N5
2 3 NC OUTPUT
V+
V-
NC
NC(+)
R57 4K7
NO_GOLD 2 CHANNEL 2 INPUT NO_GOLD 2 RIGHT
S
4
6
C37 6N8
4K7 C39 R55 10K R49 10K 100N R58 2K2 6 5 SG
R51 470R 5
T
3
R
1 J8
S
4
R
6
T
C1 47P
P1 1OK
B
CW
100N VOLUME2 R56 3K9 SG SG 7 U3
1/2
EFX_SEND
R2 J2 1 3 5 470R R27 470R
J4
6
4
2 NO_GOLD
TLO72 R32 36K0 C19 47P +35VDC D1 1K8 R36 1K8 R37 40V C25 2200U AG C26 SG 40V 2200U R38
0.5W
TLO72
5
T
3
R
1 J9
S
EFX_RTN
6 SG +16V C14 68N R12 10K C17 10U R20 1K
9 1 5
4
2 GOLD_T
SG
IG
+35VDC AG POLY C21 50V 1U AG R22 15K
3 7 10 8
SG AG 5 3
R
EXPORT T1 230Vac 50Hz #1206 SW1 T1 120Vac AG 60Hz 400V C32 22n #1309
1N5402 D2 1N5402 D3 1N5402 D4 1N5402
C27 25V 100U C28 25V 100U
16V 5246B ZD2 16V 5246B ZD3
1 J5
S
400V
1N4004 D5
5W
T
PHONES
6 100R R31
4
2 GOLD_S R52
5W
C32 22n SW1
C16 680P -16V R13 100K C15 680P AG AG
U4
4
POLY LM3876 10R R25
0.5W
0.5W
0.5W
1K2 BROWN BLUE GRN/YEL BLACK GREEN WHITE LD1
RED
1K5 R35
-35VDC
AG EXPORT FOR JAPAN 100Vac 50Hz #1209J DATE: APR/24/2000 YORKVILLE NAME: M578.SCH MODELS: PCB#&VER: 50KB M578
100U 25V C18 AG
10K R21
POLY C22 50V 1U
AG
M578.SCH_DATABASE_HISTORY
MODEL(S):# DATE
1 2 3 4 5 6 7 8 9 10 JAN/2000 APR/24/00 D D D D D D D D
-35VDC NOTE: ALL UNMARKED DIODES 1N4148 SCH ISSUE: 1.00
50KB VER# DESCRIPTION OF CHANGE
1.P0 1.00 V V V V V V V V FIRST_PROTOTYPE_DERIVED_FROM_M512 DELETE_D11->D14_C12_15P->27P N N N N N N N N
TITLE: 50KB_MIXER_AMP
0.5W
F1
C30 4n7 250V
1K2
C23 40V 220N 10R R23 4R7 R59
C40 . 180N 4R7 R60
SPKR1 4R 10" #7322
22R SPKR2 #7415 3.75" 4R
0.8A-SB
T400mA
F1
R39
0.5W
AG 16V 1N5246B ZD4
R21
R22
C16 R13 C15
10K
16V
$$2
1K
C21
15K
C40 180N
U4
1N4004
J9 680P 100K 680P
C18 ZD4 1U C22 100U 25V 1U
C17
J8
R20
D5
J5
WC2
TRANS PRIM
16V
J30
SEC_IN
SEC_GND
16V
SEC_IN
0.5W 1K2 0.5W 1K2
.
TRANS PRIM
00.1-875M
100U 25V 100U 25V
.
.
.
.
1N5402
1N5402
SHEAR
TAB2 CE-T400MA CSA-0.8A/240V TAB4
J19
68N
C26
TAB6
.
R43
J16 R56 C38 R15 R14 R55 R54 R11 J12 10K 100n C2 100K U1 47P C37 C9 16V 4U7 R32 C19 R49 10K
50V 2200U RTV
C14
AC HOT
C27
J33
.
.
C5 R8 C34
WC3 J34 R51 470R
J11
27K
180K
R10
J10 4K99
100n
1N
J17 J18 3K9 100N 47K 47K 10K 10K
1N 4K99 100N
6N8 27P J21
100N
C3
R47
R46
R35
R3 R4
C35
R58
R5 R6
562R 562R 4K99 4K99 J13
GRN
J26 C13 R57 R50 C39
33u . 16V
C12
R45 R48
C11
C20 63V 2u2 47P C1 R30 J14 J15 WC6
120R
GOLD-TIP
GOLD-SLV
JB2
100N
LED1 + GRN -
R9
BOT WIP
TOP
GAIN-1 P2 PT#4418
5C
JB7
MONO-IN-1
PART#3660
BOT WIP
TOP
LEFT-MONO JB1
RIGHT P3
BOT WIP
TOP
BOT WIP
TOP
EFX-SEND
EFX-RTN
PHONE
GAIN-2 P1 PT#4417
5B
BASS PT#4420
B
TREBLE P4 PT#4420
B
10K
.
10K
JB4 WHT
50K #3460
RED
50K
12" GREEN
TO CHASSIS GND
M578.PCB_DATABASE_HISTORY
MODEL(S):- 50KB # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 JAN/2000 . APR/2000 APR/20/00 D D D D D D D 1.P0 . 1.0P2 10P3 V V V V V V V PC#____DERIVED_FROM_M512 POTS_CHANGED_TO_STYLE_28 GROUNDS_UPDATED_RCA_JKS_WIRES->JMPR DELETE_D11->D14_C12_15P->27P N N N N N N N REF
P1 P2 P3 P4 R R
VCD
M578.PCB_POT_LIST
MODEL(S):- 50KB-50KW
FUNCTION PART# KNOB
GAIN-2 GAIN-1 BASS TREBLE F F #4417 #4418 #4420 #4420 P P #8641 #8641 #8641 #8641 K K
PRODUCTION NOTES
1 2 3 4
RTV
GREEN LED BEND
AS_OF
JAN/2000 . . . N N
THIS SYMBOL INDICATES WHERE RTV IS TO BE USED BETWEEN THE COMPONENT AND THE PCB ADD RTV TO ALL .2 SPACING ELECTROLYTIC CAPACITORS TWO LEGS OF ALL PHONE JACKS MUST BE BENT FLAT TO THE PCB BEFORE SOLDERING WC2 AND WC6 GREEN WIRES FOR N.A. WC2 NO WIRE FOR S VERSION WC6 GRN/YELL WIRE FOR S VERSION SOLDER DO NOT STUFF C30 FOR S VERSION WC1 AND WC3 BLACK 18AWG WIRES FOR N.A. PCB BLACK DOUBLE/INSUL. FOR S JACK LEG BEND USE T400MA #2462 FUSE FOR S VERSION
PART# SWITCH
47K
4K7
C10
J23
J24
J25
4K7 1K
1N
1K5
R29 20K0 R28 20K0 R1 470R 36K0 470R R26
470R 470R
R2 R27
JB8
JB9
JB5
F1
100U 16V
C6
J29
47N 250V
TLO72
2K2
TLO72
U3
C7
U2
33078
0.8A-SB AC_LINE
100N 100n C36
36K0 47P
1N5 4K7 4K7 100N
#3414
C33
SHEAR
1K8 1K8 J22
R37 R36
DOWN
R44 C8
D3
R7
C4
D4
DOWN
WC1
AC RET
BAR
BAR
.
TAB3
M578 50KB VER 1.00
J27
J31
J32
250V 4N7
RTV
100R 5W
J35
1N5402 1N5402 D2
J1
J2
J3
C30
J4
J6
J7
R38
ZD2
R12 10K
R39
J20
TAB7
ZD3
TAB5
DOWN
J28
DOWN
BAR
BAR
D1
C28
C25
P:\578V10.PRN
. #6755
PT#7322
PT#7415 WC2 AND WC6 GREEN WIRES FOR N.A. WC2 NO WIRE FOR S VERSION WC6 GRN/YELL WIRE FOR S VERSION RED N.B
BLACK
BLUE
WHITE
LM38x6 16V 10u
C23 220N
4R7 0.5W 4R7 0.5W 10R 0.5W 10R 0.5W
R59 R60
RTV SPKR(-) SPKR(+)
TAB9
5W 22R
R52
TAB10
TWEET(-)
FUNCTION
R25 R23
TAB8
4" GREEN
.
FUNCTION
.
FUNCTION
.
BLACK
RED
WHITE
R31
GRN
DO NOT STUFF C30 FOR S VERSION WC1 AND WC3 BLACK 18AWG WIRES FOR N.A. BLACK DOUBLE/INSUL. FOR S
RTV
50V 2200U
RTV
C32 TAB1 250TAB 22N 400V .
STYLE P28
M578A.PCB_POT_LIST
C33 +16V -16V C2 100N C3 100N SG 10K VOLUME1 R3 4K99 R4 J7 1 MONO
S
C35 100N C36 100N SG
+16V
MODEL(S):# REF
1 2 3 4 5 6 7 8 9 10 P1 P2 P3 P4 D D D D D D
50KW FUNCTION
GAIN-2 GAIN-1 BASS TREBLE F F F F F F
PART#
#4417 #4418 #4420 #4420 N N N N N N
KNOB
#8641 #8641 #8641 #8641 K K K K K K
AS_OF
JAN/2000 . . . D D D D D D
100N C34 100N
-16V
STYLE "P28"
J6 2 MIC_IN 3 NUTRIX 1 IG CHANNEL 1 INPUT 3
R
R5 562R 2 3 R6 562R R26
C4 1N R7 4K99 1 U2
1/2
CW
5C P2 120R R9 33U C6 16V 6 7 5 U2
1/2
R10 180K
C7 16V 100U
R43 27K R11 10K 6 5
C8 47p R44 100K 7 U1
1/2
R45 4K7 4U7 C9 16V BASS TREBLE B P4
CW
C10 100N 50K
CW
R46 C12 27P 1 3 U3
1/2
B P3 R47 4K7 47K C11 1N R48 1K 2
PIN 1
5
T
4K99
33078 R8 4K99 C5 1N J3 2 RCA 1 1 RCA 2 R15 47K R30 36K0
LM3876T
10 V_IN+ 11 NC 4 5 6 7 GND 8 MUTE 9 V_IN-
1
NO_GOLD 2
4
6 470R R1
33078 SG SG
TLO72
50K SG
TLO72
2 3 NC OUTPUT
V+
V-
NC
NC(+)
J1 1 LEFT/MONO
S
3
R
5
T
470R
C13 3N3 2u2 C20 16V R54 10K R14 47K R28 20K0 R29 20K0 2 1 3 U1
1/2
R50 C37 6N8 C38 150N VOLUME2 R56 2K7 SG SG 10K R55 10K R49 10K 6 7 5 U3
1/2
NO_GOLD 2 CHANNEL 2 INPUT NO_GOLD 2 RIGHT
S
4
6
R51 470R 5
T
3
R
1 J8
S
4
R
6
T
C1 47P
P1 1OK
B
CW
TLO72
EFX_SEND
R2 J2 1 3 5 470R R27 470R
J4
6
4
2 NO_GOLD
TLO72 R32 36K0 C19 47P +35VDC D1 1K8 R36 1K8 R37 40V C25 2200U AG C26 SG 40V 2200U R38
0.5W
5
T
3
R
1 J9
S
EFX_RTN
6 SG +16V C14 47N R12 10K C17 10U R20 1K
9 1 5
4
2 GOLD_T
SG
IG
+35VDC AG POLY C21 50V 1U AG R22 15K
3 7 10 8
SG AG 5 3
R
EXPORT T1 230Vac 50Hz #1206 SW1 T1 120Vac AG 60Hz 400V C32 22n #1309
1N5402 D2 1N5402 D3 1N5402 D4 1N5402
C27 25V 100U C28 25V 100U
16V 5246B ZD2 16V 5246B ZD3
1 J5
S
400V
1N4004 D5
5W
T
PHONES
6 100R R31
4
2 GOLD_S R52
5W
C32 22n SW1
C16 680P -16V R13 100K C15 680P AG AG
U4
4
POLY LM3876 10R R25
0.5W
0.5W
0.5W
1K2 BROWN BLUE GRN/YEL BLACK GREEN WHITE LD1
RED
1K5 R35
-35VDC
AG EXPORT FOR JAPAN 100Vac 50Hz #1209J DATE: MAY/15/2000 YORKVILLE NAME: M578A.SCH MODELS: PCB#&VER: 50KW M578A
100U 25V C18 AG
10K R21
POLY C22 50V 1U
AG
M578A.SCH_DATABASE_HISTORY
MODEL(S):# DATE
1 2 3 4 5 6 7 8 9 10 JAN/2000 APR/24/00 MAY/15/00 . D D D D D D
-35VDC NOTE: ALL UNMARKED DIODES 1N4148 SCH ISSUE: 1.10
50KW VER# DESCRIPTION OF CHANGE
1.P0 1.00 1.10 . V V V V V V FIRST_PROTOTYPE_DERIVED_FROM_M512 DELETE_D11->D14_C12_15P->27P PC#6253_C38_100N->150N_R56->2K7 C14->47N N N N N N N
TITLE: 50KW_MIXER_AMP
0.5W
F1
C30 4n7 250V
1K2
C23 40V 220N 10R R23 4R7 R59
C40 . 180N 4R7 R60
SPKR1 4R 10" #7322
22R SPKR2 #7415 3.75" 4R
0.8A-SB
T400mA
F1
R39
0.5W
AG 16V 1N5246B ZD4
R21
R22
C16 R13 C15
10K
16V
$$2
1K
C21
15K
C40 180N
U4
1N4004
J9 680P 100K 680P
C18 ZD4 1U C22 100U 25V 1U
C17
J8
R20
D5
J5
WC2
TRANS PRIM
16V
J30
SEC_IN
SEC_GND
16V
SEC_IN
0.5W 1K2 0.5W 1K2
.
TRANS PRIM
00.1-875M
100U 25V 100U 25V
.
.
.
.
1N5402
1N5402
SHEAR
47N
TAB2 CE-T400MA CSA-0.8A/240V TAB4
J19
C26
TAB6
.
R43
J16 R56 C38 R15 R14 R55 R54 R11 J12 10K 100n C2 100K U1 27P C37 C9 16V 4U7 R32 C19 R49 10K
50V 2200U RTV
C14
AC HOT
C27
J33
.
.
C5 R8 C34
WC3 J34
J11
27K
180K
R10
J10 4K99
100n
J17 J18 2K7 150N 47K 47K 10K 10K
1N 4K99 100N
6N8 27P J21
100N
C3
TLO72
R47
R46
R35
R3 R4
J26 C13
R5 R6
562R 562R 4K99 4K99 J13
GRN
C35
J23
J24
J25
4K7 1K
J14 J15
1N
WC6
120R
GOLD-TIP
GOLD-SLV
JB2
100N
LED1 + GRN -
R9
BOT WIP
TOP
GAIN-1 P2 PT#4418
5C
JB7
MONO-IN-1
PART#3660
BOT WIP
TOP
LEFT-MONO JB1
RIGHT P3
BOT WIP
TOP
BOT WIP
TOP
EFX-SEND
EFX-RTN
PHONE
GAIN-2 P1 PT#4417
5B
BASS PT#4420
B
TREBLE P4 PT#4420
B
10K
.
10K
JB4 WHT
50K #3460
RED
50K
12" GREEN
TO CHASSIS GND
M578.PCB_DATABASE_HISTORY
MODEL(S):- 50KB # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 JAN/2000 . APR/2000 APR/20/00 D D D D D D D 1.P0 . 1.0P2 10P3 V V V V V V V PC#____DERIVED_FROM_M512 POTS_CHANGED_TO_STYLE_28 GROUNDS_UPDATED_RCA_JKS_WIRES->JMPR DELETE_D11->D14_C12_15P->27P N N N N N N N REF
P1 P2 P3 P4 R R
VCD
M578.PCB_POT_LIST
MODEL(S):- 50KB-50KW
FUNCTION PART# KNOB
GAIN-2 GAIN-1 BASS TREBLE F F #4417 #4418 #4420 #4420 P P #8641 #8641 #8641 #8641 K K
PRODUCTION NOTES
1 2 3 4
RTV
GREEN LED BEND
AS_OF
JAN/2000 . . . N N
THIS SYMBOL INDICATES WHERE RTV IS TO BE USED BETWEEN THE COMPONENT AND THE PCB ADD RTV TO ALL .2 SPACING ELECTROLYTIC CAPACITORS TWO LEGS OF ALL PHONE JACKS MUST BE BENT FLAT TO THE PCB BEFORE SOLDERING WC2 AND WC6 GREEN WIRES FOR N.A. WC2 NO WIRE FOR S VERSION WC6 GRN/YELL WIRE FOR S VERSION SOLDER DO NOT STUFF C30 FOR S VERSION WC1 AND WC3 BLACK 18AWG WIRES FOR N.A. PCB BLACK DOUBLE/INSUL. FOR S JACK LEG BEND USE T400MA #2462 FUSE FOR S VERSION
PART# SWITCH
47K
4K7
C10
47P C1 R30
1K5
470R 470R
R2 R27
R50
33u . 16V
C12
R45 R48
C11
C20 63V 2u2
R29 20K0 R28 20K0 R1 470R 36K0 470R R26
JB8
JB9
JB5
F1
100U 16V
C6
J29
47N 250V
TLO72
U3
U2
33078
NO PART
C7
3N3 $$4 10K NO PART
0.8A-SB AC_LINE
R51 470R
1N
100N 100n C36
36K0 47P
#3414
C33
SHEAR
1K8 1K8 J22
R37 R36
DOWN
R44 C8
D3
R7
C4
D4
DOWN
WC1
AC RET
BAR
BAR
.
TAB3
M578A 50KW VER 1.00
J27
J31
J32
250V 4N7
RTV
100R 5W
J35
1N5402 1N5402 D2
J1
J2
J3
C30
J4
J6
J7
R38
ZD2
R12 10K
R39
J20
TAB7
ZD3
TAB5
DOWN
J28
DOWN
BAR
BAR
D1
C28
C25
P:\578AV10.PRN
. #6755
PT#7322
PT#7415 WC2 AND WC6 GREEN WIRES FOR N.A. WC2 NO WIRE FOR S VERSION WC6 GRN/YELL WIRE FOR S VERSION RED N.B
BLACK
BLUE
WHITE
LM38x6 16V 10u
C23 220N
4R7 0.5W 4R7 0.5W 10R 0.5W 10R 0.5W
R59 R60
RTV SPKR(-) SPKR(+)
TAB9
5W 22R
R52
TAB10
TWEET(-)
FUNCTION
R25 R23
TAB8
4" GREEN
.
FUNCTION
.
FUNCTION
.
BLACK
RED
WHITE
R31
GRN
DO NOT STUFF C30 FOR S VERSION WC1 AND WC3 BLACK 18AWG WIRES FOR N.A. BLACK DOUBLE/INSUL. FOR S
RTV
50V 2200U
RTV
C32 TAB1 250TAB 22N 400V .
STYLE P28
#8 48 6 L O C K W A SH E R CHAS SIS
1 30 9 50KB /50KW EXP ORT AC W IRIN G May 25, 2000
4" BLACK DBL/INS
LINE CORD 4" BLACK DBL/INS
Block Diagram for 50KB
+15V Phantom Power
*Only available after SER# 308XXXX
D E S I G N E D A N D M A N U FAC T U R E D B Y Y O R K V I L L E S O U N D
Channel Inputs
XLR Balanced Input 1 Gain Pot
Speaker & Headphone Outputs
Mono Balanced In 1 Stereo 1/4 inch
Tweeter 8 ohms EQ Low / High Contour Filter Buffer AMP Woofer 8 o hms
RCA Stereo
Left/Mono Balanced In 2 Stereo 1/4 inch Right Balanced Gain 2
Input 2 Volume Pot
Phones Stereo 1/4 inch EFX Send EFX Return
Balanced Effects Loop
BLOCK-DIAGRAM-50KB-5V0 .ai
C:\ADATA\block diagrams\BLOCK-DIAGRAM-50KB-5V0.ai 17-JUL-2003 SE