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SERVICE MANUAL
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
sm-bm50.pdf Sept/98
Quality and Innovation Since 1963
Printed in Canada
BM50 Parts List 9/29/98
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.
INSTRUCTIONS RELATIVES AU RISQUE DE FEU, CHOC ÉLECTRIQUE, OU BLESSURES AUX PERSONNES.
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.
AVIS:
AFIN DE RÉDUIRE LES RISQUE DE CHOC ÉLECTRIQUE, N'ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIÈRE). NE CONTIENT AUCUNE PIÈCE RÉPARABLE PAR L'UTILISATEUR.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. Read Instructions:
The Owner's Manual should be read and understood before operation of your unit. Please, save these
CONSULTEZ UN TECHNICIEN QUALIFIÉ POUR L'ENTRETIENT. Veuillez lire le manuel:
Il contient des informations qui devraient êtres comprises avant l'opération de votre appareil. Conservez S.V.P. ces instructions pour consultations ultérieures
instructions for future reference.
Packaging:
Keep the box and packaging materials, in case the unit needs to be returned for service.
Emballage:
Conservez la boite au cas ou l'appareil devait être retourner pour réparation.
Warning:
When using electric products, basic precautions should always be followed, including the following:
Warning:
Attention: Lors de l'utilisation de produits électrique, assurez-vous d'adhérer à des précautions de bases incluant celle qui suivent: Alimentation:
L'appareil ne doit être branché qu'à une source d'alimentation correspondant au voltage spécifié dans le manuel ou tel qu'indiqué sur l'appareil. Cet appareil est équipé d'une prise d'alimentation polarisée. Ne pas utiliser cet appareil avec un cordon de raccordement à moins qu'il soit possible d'insérer complètement les trois lames. Des précautions doivent êtres prises afin d'eviter que le système de mise à la terre de l'appareil ne soit désengagé.
Power Sources:
Your unit should be connected to a power source only of the voltage specified in the owners manual or as marked on the unit. This unit has a polarized plug. Do not use with an extension cord or receptacle unless all three blades can be fully inserted to prevent blade exposure. Precautions should be taken so that the grounding scheme on the unit is not defeated.
Power Cord:
The AC supply cord should be routed so that it is unlikely that it will be damaged. If the AC supply cord is damaged DO NOT OPERATE THE UNIT.
Service:
The unit should be serviced only by qualified service personnel.
Cordon d'alimentation:
Évitez d'endommager le cordon d'alimentation. N'UTILISEZ PAS L'APPAREIL si le cordon d'alimentation est endommagé.
Service:
Consultez un technicien qualifié pour l'entretien de votre appareil.
YS No. 6405 6438 6825 6827 6824 6463 5101 5102 5119 6774 6917 6918 6882 5400 5402 5410 5417 5420 5428 5432 6451 5376 5834 5304 6435 5306 5314 5255 5257 5259 5281 5260 5961 5265 5267 5887 4409 4406 711 8547 3467 3489 3491 3682 3498 3523 3527 3451 3414 2468 2410 8459 8604 3563 3800 3804 3795 3799 3803 3810 3827 8693 3481 3834 8800 8841 8898 3830 4597 4599 4729 4815 4618 4817 4692 4852 4867 4873 4623 4823
Description RED 3MM LED 1V7 5MA BRIGHT PACE 1N4004 400V 1A0 DIODE T&R 1N4148 75V 0A45 DIODE T&R 1N5402 200V 3A0 DIODE 1N5246B 16V0 0W5 ZENER 5% T&R 1N5251BRL 22V0 0W5 ZENER 5% T&R BC550C TO92 NPN TRANS. T&R BC560C TO92 PNP TRANS. T&R 2N5638 TO92 N CHAN J FETT&R BD139 TO126 NPN TRANS BDV64B TO218 PNP DARLINGTON BDV65B TO218 NPN DARLINGTON TL072CP IC FET DUAL OP AMP _10P 100V 10%CAP T&R TUBULAR NPO _15P 100V 10%CAP T&R TUBULAR NPO 100P 100V 10%CAP T&R BEAD NPO 330P 50V 10%CAP T&R BEAD NPO 680P 50V 10%CAP T&R BEAD NPO __3N3 50V 10%CAP T&R TUBULAR Y5R __4N7 50V 10%CAP T&R TUBULAR Y5R __4N7 250V 20%CAP AC Y ONLY RAD10MM __6N8 50V 5%CAP T&R BEAD X7R _10N 250V 20%CAP RAD POLYFILM BULK _22N 50V 10%CAP T&R BEAD X7R _22N 275V 20%CAP AC X2 RAD BLK15MM _33N 50V 10%CAP T&R BEAD X7R 100N 50V 10%CAP T&R BEAD X7R __1U 63V 20%CAP T&R RADIAL ELE.2" __2U2 63V 20%CAP T&R RADIAL ELE.2" __4U7 63V 20%CAP T&R RADIAL ELE.2" _10U 16V 20%CAP NONPOLAR T&R .2" _22U 50V 20%CAP T&R RADIAL ELE.2" _33U 16V 20%CAP NONPOLAR T&R RAD _68U 25V 20%CAP T&R RADIAL ELE.2" 100U 25V 20%CAP T&R RADIAL ELE.2" 2200U 50V 20%CAP RADIAL ELECT BULK _10K 5C-REV/AUDIO STYLE"P14"16MM _50K 5B-LINEAR STYLE"P14"16MM 30 X 50 X 1.5MIL PLASTIC BAG PLASTIC FOOT BLACK CLIP 205X032 14-16AWG DISC/INSUL CLIP 250X032 18-22AWG DISCO/INSL CLIP 205/187X020 18-22AWG DISCO/INS 250 MALE PCB TAB BULK ON CATRIGE M203-02 PLAIN PC MNT JK SKT M203-02A GOLD TIP PC MNT JK SKT M203-02B GLOD SLV PC MNT JK SKT 0.089 OD SMALL EYELET ELECTROPLATED INTERNATIONAL PC MOUNT FUSEHOLDER 0.800 AMP SLO-BLO .25X1.25 FUSE 4.0 AMP FAST-BLO .25X1.25 FUSE 9.5" STRAP HANDLE, PLASTIC COVERS 10-32 T NUT TRANSISTOR MOUNTING BRACKET BELLY BUTTON #BB1 CORDS CANADA SNAP ON 1.5" INSULATING BUSHING #8 GROUND LUG ZIERICK 505-169 ROUND BUMPER BUTTON BLACK NYLON SECUR-A-TACH MINI PLASTIC TIE 4" NYLON CABLE TIE SQUARE BUMPER BUTTON BLACK S ROTARY KNOB GREY 8? 3/18 SJT AC LINE CORD 250 CLIPS HEYCO #1214 STRAIN RELIEF 6-32 KEPS NUT ZINC 10-32 KEPS NUT ZINC 1/4-20 CAGE NUT C7998142027 TO218 PREGREASED MICA 56-78-2AP 22AWG STRAN TC WIR 22AWG SOLID SC WIR T&R 5.0W 0R27 5% BLK RES 1/4W 12R 5% T&R RES 1/2W 22R 5% T&R RES 1/4W 47R 5% T&R RES 5.0W 100R 5% BLK RES 1/4W 100R 5% T&R RES 1/4W 270R 5% T&R RES 1/4W 680R 5% T&R RES 1/2W 1K 5% T&R RES 1/4W 1K 5% T&R RES
Qty.
1 2 5 4 2 1 1 2 1 1 1 1 2 3 1 2 1 6 1 1 1 2 1 1 1 1 5 1 1 1 2 1 1 1 2 2 1 3 1 4 2 2 2 9 1 1 1 4 6 1 2 1 2 1 2 1 1 1 1 6 1 4 1 1 7 2 4 2 6 20 2 2 1 1 1 1 2 3 2 1
YS No. 4824 4825 4847 4826 4829 4830 4832 4834 4838 4844
Description 1/4W 1K5 5% 1/4W 1K8 5% 1/4W 2K2 5% 1/4W 3K3 5% 1/4W 10K 5% 1/4W 15K 5% 1/4W 22K 5% 1/4W 47K 5% 1/4W 100K 5% 1/4W 1M 5%
Qty.
T&R RES T&R RES T&R RES T&R RES T&R RES T&R RES T&R RES T&R RES T&R RES T&R RES 3 1 5 6 4 3 5 2 2 2
9815 8801 8828 8876 8624 8756 8781 8843 8770 8905 8656 7337 3511 8852 8817 3698 3940 3941 3943 3949 3958 1309
1/2" POPLAR SELECT 1 4X4 ONLY 6-32 X 3/8 PAN PH TAPTITE SJ500 6-32 X 3/4 PAN PH TAPTITE SJ500 #6 X 1 1/2 PAN PH TYPE A SJ500 10-32 X 1/2 HEX HD MS JS500 BLK #10 X 3/4 PAN PH TYPE A JS500 BLACK #10 X 7/8 FLAT PHIL TYPE A JS500BLK 10-32 X 1 1/8 FLAT PH MS SJ500 1/4-20 X 1 5/16 TRUSS PH MS JS500 YORKVILLE PRODUCT SCHEMATIC .171 X 1/4 NYLON SPACER #SP42 10" 4R 50W SPEAKER BASS GUITAR #6 FLAT WASHER NYLON #6 INTERNAL TOOTH LOCKWASHER #10 FLAT WASHER BLACK OXIDE SPST ROKR SW QUIK 180" AC PWR BL/BL RED 18 AWG TR-64 PREFUSED BLACK 18 AWG TR-64 PREFUSED GREEN 22 AWG TR64 PREFUSED WIRE 18AWG GRN/YLLW STRANDED WIRE BLACK 18AWG 36STND WIRE DOUBLE INS BLOC-40B/40K/40W/50B XFMR
0.21 2 6 4 2 8 6 2 4 1 5 1 2 1 2 1 2.166 2.166 0.25 0.416 1.333 1
safe_v3.doc Version 3.5 Mar 98
-16V
+16V C12 100N C13 100N C1 4N7 C2 680P
+16V
R3 2K2 D11 2 3
J1 1 3 5 INPUT
S R T
SG R1 10K
C3 330P R105 2K2 R106 680R 1 U1
1/2
GOLD-T 2 4 6
TLO72 33U C4 R2 16V R4 1M D12 100R
C56 100N SG R5 680R 16V C5 10K 10U C6 CW 10U 16V 5C P1GAIN SG
C7 22N 50K R6 CW 15K BASS B P2 R8 47K 6N8 C8 MID B P3
CW
R7 15K
C33 100P 6 7 5 U1
1/2
R43 22K
6 5 SG
C59 100P R110 22K 7 U2
1/2
5 3 1 J4
T R S
LINE_OUT
6 4 2 NO-GOLD WC6 SG
R9 3K3
SG
SG
SG -16V
22V 5251B ZD4 2K2 R40 1N4004 D6 D7 1N4004
C29 25V 1U
R41 10K 1M R42 D8
C31 25V 2U2 AG Q7
50K C9 6N8 C10 TREBLEB P4 680P R45 R46 CW 50K 3K3 3K3 C11 680P R15 22K R14 1K8 BC560
R44 100K R10 3K3
TLO72
SG
TLO72 C57 3N3 R107 R108 22K 22K R109 1K C58 100N SG
2 1 3 U2
1/2
R11 270R
TLO72
C14 33N R12 10K
+33VDC R16 3K3 C18 25V 68U R17 47K 10p C20 680P R21 R23 680R 10K R22 270R C19 15P Q4 BD139 R25 47R R24 15K Q3 BC550C BDV65B Q5 AG 5 3 1 J5
T R S
C16 16V 22U AG BC560 Q1 Q2
R20 3K3
R26 12R
PHONES
+33VDC D1
F2 4A-FB
120Vac AG 60Hz C32 22n 1309 SW1
1N5402 D3 1N5402 D4 AG
F3 4A-FB
SG C26 40V 2200U R38
0.5W
C28 25V 100U
16V 5246B ZD3
D10 R13 100K
C15 680P
R18 2K2 C17 10V 4U7 AG R19 2K2
TP2
R27 12R Q6 680P BDV64B C22
AG
C30 4n7 WHITE
1N5402 -33VDC LD1
RED
1K R39
0.5W
0.8A-SB
F1
-16V AG AG
BLACK GREEN
1K R35 1K5
CUT OUT R23, R24 UNTIL 2 TO 4mV IS ACROSS TP1 AND TP2 WITH AMP COLD
-33VDC NOTE: ALL UNMARKED DIODES 1N4148
AG THE 50B BY A.WILSON AND C.CHIU
M510.SCH_DATABASE_HISTORY
1 MAR/30/95 2 MAY/01/95 3 JUN/01/95 4 DEC/09/97 5 D 6 D 7 D 8 D 9 D 10 D
BDV65B BDV64B BD139 2N5638
BC550C BC560C
MODEL(S):- BM50 # DATE VER# DESCRIPTION OF CHANGE
3.20 3.30 3.40 3.50 V V V V V V
PRIMARY_FUSE_0.6ASB->0.8ASB PC#4781)D6/D7_BAV21->1N4004 PC#4801_ADD_10p_ACROSS_R17 REBADGED_AS_BASSMASTER_50 N N N N N N
DSG ECB B C E
CBE
DATE: DEC/09/97
MODELS: BASS-MASTER_50 PCB#&VER: M510
0.5W
5W
T1
1N5402 D2
C25 40V 2200U
R36 1K5 R37 1K5
5W
C27 25V 100U
16V 5246B ZD2
D9
C21 100N
5W
AG +16V
2N5638
6 4 2 GOLD_S
TP1
R28 0R27
100R R31
SPKR1 10"4R-50W #7337
22R R29 0R27 R30 POLY C23 10N
SCH ISSUE: 3.50 TITLE: BASS_AMP_BM50
YORKVILLE NAME: BM50.SCH
-16V
+16V C12 100N C13 100N C1 4N7 C2 680P
+16V
R3 2K2 D11 2 3
J1 1 3 5 INPUT
S R T
SG R1 10K
C3 330P R105 2K2 R106 680R 1 U1
1/2
GOLD-T 2 4 6
TLO72 33U C4 R2 16V R4 1M D12 100R
C56 100N SG R5 680R 16V C5 10K 10U C6 CW 10U 16V 5C P1GAIN SG
C7 22N 50K R6 CW 15K BASS B P2 R8 47K 6N8 C8 MID B P3
CW
R7 15K
C33 100P 6 7 5 U1
1/2
R43 22K
6 5 SG
C59 100P R110 22K 7 U2
1/2
5 3 1 J4
T R S
LINE_OUT
6 4 2 NO-GOLD WC6 SG
R9 3K3
SG
SG
SG -16V
22V 5251B ZD4 2K2 R40 1N4004 D6 D7 1N4004
C29 25V 1U
R41 10K 1M R42 D8
C31 25V 2U2 AG Q7
50K C9 6N8 C10 TREBLEB P4 680P R45 R46 CW 50K 3K3 3K3 C11 680P R15 22K R14 1K8 BC560
R44 100K R10 3K3
TLO72
SG
TLO72 C57 3N3 R107 R108 22K 22K R109 1K C58 100N SG
2 1 3 U2
1/2
R11 270R
TLO72
C14 33N R12 10K
+33VDC R16 3K3 C18 25V 68U R17 47K 10p C20 680P R21 R23 680R 10K R22 270R C19 15P Q4 BD139 R25 47R R24 15K Q3 BC550C BDV65B Q5 AG 5 3 1 J5
T R S
C16 16V 22U AG BC560 Q1 Q2
R20 3K3
R26 12R
PHONES
+33VDC D1
F2 4A-FB
230Vac AG 50Hz C32 22n 1206 SW1
1N5402 D3 1N5402 D4 AG
F3 4A-FB
SG C26 40V 2200U R38
0.5W
C28 25V 100U
16V 5246B ZD3
D10 R13 100K
C15 680P
R18 2K2 C17 10V 4U7 AG R19 2K2
TP2
R27 12R Q6 680P BDV64B C22
AG
BROWN GRN/YELL
1N5402 -33VDC LD1 BLUE
RED
1K R39
0.5W
T400MA
F1
-16V AG AG
1K R35 1K5
CUT OUT R23, R24 UNTIL 2 TO 4mV IS ACROSS TP1 AND TP2 WITH AMP COLD
-33VDC NOTE: ALL UNMARKED DIODES 1N4148
AG THE 50B BY A.WILSON AND C.CHIU
M510.SCH_DATABASE_HISTORY
1 MAR/30/95 2 MAY/01/95 3 JUN/01/95 4 DEC/09/97 5 D 6 D 7 D 8 D 9 D 10 D
BDV65B BDV64B BD139 2N5638
BC550C BC560C
MODEL(S):- BM50E # DATE VER# DESCRIPTION OF CHANGE
3.20 3.30 3.40 3.50 V V V V V V
PRIMARY_FUSE_0.6ASB->0.8ASB PC#4781)D6/D7_BAV21->1N4004 PC#4801_ADD_10p_ACROSS_R17 REBADGED_AS_BASSMASTER_50 N N N N N N
DSG ECB B C E
CBE
DATE: DEC/09/97
MODELS: BASS-MASTER_50 PCB#&VER: M510
0.5W
5W
T1
1N5402 D2
C25 40V 2200U
R36 1K5 R37 1K5
5W
C27 25V 100U
16V 5246B ZD2
D9
C21 100N
5W
AG +16V
2N5638
6 4 2 GOLD_S
TP1
R28 0R27
100R R31
SPKR1 10"4R-50W #7337
22R R29 0R27 R30 POLY C23 10N
SCH ISSUE: 3.50 TITLE: BASS_AMP_BM50E
YORKVILLE NAME: BM50E.SCH
"529.01X "052.21 =EZIS KNALB BLANK SIZE= 12.250" X 10.925"
TOP Q3 NB Q5 PLACE THE TOP OF Q3 AGINST THE UPPER PART OF ROUTED AREA. BC550C J19 BEND BOTTOM LEADS OF Q3 TOWARDS FRONT OF BOARD. BEND Q3 DOWN INTO ROUTED AREA AS SHOWN. BDV64B J20 J21 Q6 C32 250TAB 250TAB
XFMR_PRI AC_BLK AC_WHT
BDV65B J16 J17 J18
Q3 J11 C18 270R 680R 100N 680P
XFMR_PRI
TAB1 WC1 C30 12R R27
0.8A-SB AC_LINE
250TAB
250TAB
22N 400V 4N7 250V
#3414
N.B
F1
TAB2
10K
15K
3K3
TAB8 250TAB
R15
M510 50B VER-3.20
R29
J4 C29 J3
Q7 2N5638
1N4148
680P
12R
22K
WC2
WC3
5W 0R27
J22
C21 R20
R16
C22 J10
R22
R21
R23
R24 J13
D2 1N5402 D4
1N5402
J14
R26
C20
D1
0R27 5W
DOWN
Q2
10K
2K2
22V
1M
1K8
2K2
22R 0.5W
DOWN
R42 ZD4 D8
R41
R28
10N 100V C23
TAB6
C31
R40
BD139
D3
J12 R107 R14 R108 R18 R109
R17 C24
C19 R25
R19
R13 C15
D10
02.3-015M D11 D12 C12 C13 Q4
J2
R30
J1
BC560 Q1 C57
C28
1N4148
2200u 50V 2200u 40V
SHEAR
R3 R105 R106 R44 C33 C10
1N4148
1K5
J101
10K
1N4148
J15
1N4148
100N 100N
3N3 C59
22K
22K 1K
100U 25V
1K5
16V
16V
J5
U1
R110 22K 100P U2 TLO72
0.5W 1K 0.5W 1K
100U 25V
C26
J23
ZD3
J6
ZD2
J9
J8
R12
C4
R10 C8
R7
R37
R39 R38 D9
33N
C27
R36
TLO72 330P 4N7 10K 680P
2K2 2K2 680R 100K 100P 680P
22K
C58
J50
R43
R2 JB1
C56 R8
16V 33U
15K 100N
R6 R9
1M GOLD
C3 C1
C6
JB4
C14 270R 3K3 6N8 3K3 3K3
JB5
5W 100R R31
C5 100R R4
R5 680R
16V 10U
+
100N 47K
15K 3K3
R11
5C10K VOLUME R1 C2 INPUT
22N B BASS 50K
6N8 50K MID B
R46 R45
C7
LINE_OUT
P1
P2
P3
P4
ASSEMBLY
RED + LED1
GOLD_S PHONES
1K5
C9
C11 680P B TREBLE 50K
R35
10U 16V
WC6
M510_3.20
VCD
M510.PCB_DATABASE_HISTORY
MODEL(S):- 50B # DATE VER# DESCRIPTION OF CHANGE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SEP/12/94 . MAY/01/95 MAY/09/95 D D D D D D D D D D D D D D D D 3.10 . 3.20 3.30 V V V V V V V V V V V V V V V V PC#4625_HOLES_ADDED_FOR_RADIAL PWR_SUPPLY_CAP PC#4781_D6/D7__BAV21-->1N4004 PC#4801_ADD_10P_ACROSS_R17 NOW_ADDED_IN_AUTO-INSERTION N N N N N N N N N N N N N N N
PRODUCTION NOTES 1 2
CUT ALL NECESSARY LEADS THAT ARE PROTRUDING FROM THE BOTTOM OF BOARD SUCH AS WC'S, FUSE HOLDER LEGS, DIODE LEADS, ETC, SO THAT THE DISTANCE BETWEEN BOARD AND CHASSIS COULD BE KEPT TO A MAXIMUM. WC1 AND WC3 BLACK 18AWG WIRES FOR N.A. BLACK DOUBLE/INSUL. FOR S WC2=3"GRN AND WC6=5"GRN GREEN WIRES FOR N.A. WC6 GRN/YELL WIRE FOR S VERSION ADD TUBING TO S VERSION WIRE WC2/WC3 NO WIRE FOR S VERSION DO NOT STUFF C30 OR F1 FUSEHOLDER FOR S VERSION
3 4
SHEAR
#3414
T2A SECONDARY 4A-FB
F3
DOWN
BAR
BAR
BC560
SEC_GND
10V 4U7
1N5402
16V FUNCTION 22U
47K 10P
15P 47R
2K2
+
100K 680P
+
250TAB
SEC_IN
+ 25V 2U2
2200u
SEC_IN
AZ HOLE
C16
C17
250TAB
+
250TAB TAB5
50V 2200u
DOWN
BAR
BAR
OUT(+)
1U 25V
40V
1N5402
TAB7
TAB9 250TAB
OUT(-)
C25
#3414
1N4004 1N4004
D6 D7
T2A SECONDARY 4A-FB
F2
25V 68U
3K3
TAB3
TAB4