Page 1
WEB ACCESS: http://www.yorkville.com
Manual-Service-am50t-00-1v1.pdf
WORLD HEADQUARTERS
CANADA
SERVICE MANUAL
MODEL TYPE: AM50
AM50T
U.S.A.
Yorkville Sound
550 Granite Court
Pickering, Ontario
L1W-3Y8 CANADA
Voice: (905) 837-8481
Fax: (905) 837-8746
Quality and Innovation Since 1963
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: (716) 297-2920
Fax: (716) 297-3689
Printed in Canada
Page 2
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS PERTAINING TO A
RISK OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Read Instructions
The Owner’s Manualshould be read and understood
before operation of your unit. Please, save these instructions for future reference.
Packaging
Keep the box and packaging materials, in case the unit
needs to be returned for service.
Warning
When using electric products, basic precautions should
always be followed, including the following:
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
the plug can be fully inserted. Precautions should be taken so that the
grounding scheme on the unit is not defeated.
Hazards
Do not place this product on an unstable cart, stand, tripod, bracket or
table. The product may fall, causing serious personal injury and serious
damage to the product. Use only with cart, stand, tripod, bracket, or
table recommended by the manufacturer or sold with the product.
Follow the manufacturer’s instructions when installing the product and
use mounting accessories recommended by the manufacturer.
The apparatus should not be exposed to dripping or splashing water;
no objects filled with liquids should be placed on the apparatus.
Terminals marked with the “lightning bolt” are hazardous live; the
external wiring connected to these terminals require installation by an
instructed person or the use of ready made leads or cords.
Ensure that proper ventilation is provided around the appliance.
No naked flame sources, such as lighted candles, should be
placed on the apparatus.
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.
INSTRUCTIONS RELATIVES AU RISQUE
DE FEU, CHOC ÉLECTRIQUE, OU
BLESSURES AUX PERSONNES
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
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.
Emballage
Conservez la boite au cas ou l’appareil devait être
retourner pour réparation.
Attention:
Lors de l’utilisation de produits électrique, assurezvous 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.
Risque
Ne pas placer cet appareil sur un chariot, un support, un trépied ou une
table instables. L’appareil pourrait tomber et blesser quelqu’un ou subir
des dommages importants. Utiliser seulement un chariot, un support,
un trépied ou une table recommandés par le fabricant ou vendus avec
le produit. Suivre les instructions du fabricant pour installer l’appareil et
utiliser les accessoires recommandés par le fabricant.
Il convient de ne pas placer sur l’appareil de sources de flammes
nues, telles que des bougies allumées.
L’appeil ne doit pas être exposé à des égouttements d’eau ou des
éclaboussures et qu’aucun objet rempli de liquide tel que des vases
ne doit être placé sur l’appareil.
Assurez que lappareil est fourni de la propre ventilation.
Les dispositifs marqués d’une symbole “d’éclair” sont des parties
dangereuses au toucher et que les câblages extérieurs connectés à
ces dispositifs de connection extérieure doivent être effectivés par un
opérateur formé ou en utilisant des cordons déjà préparés.
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.
safety-4v3.eps • Oct. 26/05
Page 3
YS-118PW
R
K
K
C
K
K
L
R
P
A
K
L
R
YS No. Description Qty. YS No. Description Qty.
6405 RED 3MM LED 1V7 5MA BRT 2 4599 22AWG SOLID SC WIR T&R JMP 41
6408 GRN 3MM LED 1V9 5MA FROSTED 1 5299 24AWG SOLID SC WIR RAD JMP 2
6825 1N4148 75V 0A45 DIODE T&R 7 4675 1/2W 10R 5% T&R RES 2
6438 1N4007 400V 1A0 DIODE T&R 1 4816 1/4W 33R 5% T&R RES 1
6827 1N5402 200V 3A0 DIODE 4 4704 5.0W 33R 5% BLK RES 1
6822 1N4745A 16V0 1W0 ZENER 5% T&R 2 4897 1/4W 120R 5% T&R RES 2
6824 1N5246B 16V0 0W5 ZENER 5% T&R 1 4857 1/4W 220R 5% T&R RES 4
5105 MPSA13 TO92 NPN TRANS DARL T&
6755 LM3876T IC 40 WATT POWER AMP 1 4655 1/2W 330R 5% T&R RES 8
6798 MC4741CP IC QUAD OP AMP 1 4799 1/4W 562R 1% T&R RES 2
6840 MC33078P IC DUAL OP AMP 1 4981 1/4W 1K 5%MINI T&R RES 3
6882 TL072CP IC FET DUAL OP AMP 4 4824 1/4W 1K5 5% T&R RES 3
6889 TL074CN IC QUAD O/A T.I ONLY 2 6113 1/4W 2K 5%MINI T&R RES 3
5402 _15P 100V 10%CAP T&R BEAD NPO 2 4883 1/4W 2K49 1% T&R RES 1
5199 100P 100V 2%CAP T&R RAD CER.2"NPO 2 4827 1/4W 4K7 5% T&R RES 5
5410 100P 100V 10%CAP T&R BEAD NPO 3 4639 1/4W 4K99 1% T&R RES 4
5420 680P 50V 10%CAP T&R BEAD NPO 2 4893 1/4W 5K1 5% T&R RES 1
5422 __1N 50V 10%CAP T&R BEAD NPO 4 4863 1/4W 8K2 5% T&R RES 2
5208 __2N2 400V 5%CAP T&R RAD .2"FLM 2 4800 1/4W 10K0 1% T&R RES 12
6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1 4829 1/4W 10K 5% T&R RES 9
5204 _10N 100V 10%CAP T&R RAD .2"FLM 2 6116 1/4W 10K0 1%MINI MF T&R RES 3
5207 _18N 100V 5%CAP T&R RAD .2"FLM 2 4830 1/4W 15K 5% T&R RES 2
6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1 6123 1/4W 20K0 1%MINI MF T&R RES 2
5308 _47N 50V 10%CAP T&R BEAD X7R 1 4840 1/4W 33K 5% T&R RES 2
5310 _68N 50V 10%CAP T&R BEAD X7R 1 4834 1/4W 47K 5% T&R RES 2
5228 100N 100V 5%CAP T&R RAD .2"FLM 1 4803 1/4W 49K9 1% T&R RES 1
5314 100N 50V 10%CAP T&R BEAD X7R 15 4836 1/4W 68K 5% T&R RES 1
5230 180N 63V 5%CAP T&R RAD .2"FLM 1 6120 1/4W 100K 5%MINI T&R RES 5
5317 180N 50V 10%CAP T&R BEAD X7R 1 4849 1/4W 180K 5% T&R RES 2
5231 220N 63V 10%CAP T&R RAD .2"FLM 2 4844 1/4W 1M 5% T&R RES 1
5233 330N 63V 5%CAP T&R RAD .2"FLM 1 3586ACC# 1BB1C1C SHORT REVERB 1
5234 470N 63V 10%CAP T&R RAD .2"FLM 1 8742 4-40 X 3/8 PAN PH TAPTITE JS500 2
5255 __1U 63V 20%CAP T&R RAD .2"EL 3 8842 #4 X 5/16 PAN QUAD TYPE A JS500 BLK 2
5256 __1U 63V 5%CAP T&R RAD .2"FLM 2 8801 6-32 X 3/8 PAN PH TAPTITE JS500 5
5257 __2U2 63V 20%CAP T&R RAD .2"EL 1 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 4
5945 _10U 63V 20%CAP T&R RAD .2"EL 1 8828 6-32 X 3/4 PAN PH TAPTITE JS500 3
5961 _33U 16V 20%CAP T&R RAD .2"NP 2 8876 #6 X 1 1/2 PAN PH TYPE A JS500 BLK 4
5267 100U 25V 20%CAP T&R RAD .2"EL 3 8763 8-32 X 1/2 PAN PH MS JS500 BLAC
5630 330U 25V 20%CAP BLK 10X13MM EL 2 8767 #8 X 3/4 PAN PHIL TYPE A JS500 BLK 8
5887 2200U 50V 20%CAP BLK 18X27MM EL 2 8815 8-32 X 3/4 PAN PH TAPTITE JS500 1
4417 _10K 5B LIN 9MM HORIZONTAL P28 2 8749 10-32 X 1/2 QDX PH TAPTITE JS500 1
4418 _10K 5C R/A 9MM HORIZONTAL P28 1 8753 #10 X 1/2 PAN PH TYPE A JS500 BLAC
4420 _50K B LIN 9MM HORIZONTAL P28 2 8781 #10 X 7/8 FLAT PHIL TYPE A JS500BLK 10
4419 100K B LIN 12MM HORIZONTAL STP27 1 8912 10-32 X 1 FLAT PHIL MS JS500 BLK 2
711 30 X 50 X 1.5MIL PLASTIC BAG 1 8843 10-32 X 1 1/8 FLAT PH MS JS500 2
3804 SNAP ON 1.5" INSULATING BUSHING 1 8770 1/4-20 X 1 5/16 TRUSS PH MS JS500 2
8547 PLASTIC FOOT BLACK, POLYETHYLENE 8 8905 YORKVILLE PRODUCT SCHEMATI
8570 CORNER, 2 LEGS NOTCED LIP BLAC
3463 CLIP 110X020 18-22AWG DISCO/INSL 2 7331 8" 8R 50WPGM SPEAKER 1
3478 CLIP 205/187X032 18-22AWG DISCO/INS 2 8820 #8 FLAT WASHER JS500 4
3489 CLIP 250X032 18-22AWG DISCO/INSL 9 8473 #10 BLACK CUPWASHER SWF-10BK 3
3490 CLIP 250X032 14-16AWG DISCO/INSL 1 3421 DPDT PUSH SW PCMT MAKE B4 BREA
3601 RING TERMINAL 16AWG WIRE & #8 SCREW 3 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL 1
3682 250 MALE PCB TAB REE
3795 #8 GROUND LUG ZIERICK 505-169 2 1309 BLOC-40B/40K/40W/50B XFMR 1
3498 1/4" JCK PCB MT HORZ 3
3886 36" RCA DUAL RED-WHITE PREFAB CABLE 1
3914 RCA SNGL PCB MT HORZ 2
3417S 6-32 SCREW TERMINAL PC MNT SNAP-IN 2
3660 XLR FEML PCB MT HORZ 1
3451 EYELET SMALL 0.089 OD PLATED 6
3414 INTERNATIONAL PC MOUNT FUSEHOLDE
2468 0.800 AMP SLO-BLO .25X1.25 FUSE 1
8451 10" STRAP HANDLE,BLACK METAL ENDCA
8604 10-32 T NUT 2
7417 8R 30W TWEETER PIEZO TLC 1 1
3745 DUAL XSISTOR PBL SPRING CLEAR ZINC 1
9897 CABINET COVER, BLACK, 54" WIDE 1
3645
C SOCKET RECEPTACLE WITH 0.250 TAB 1
3801 5/8" BUMPER BUTTON BLAC
3803 NYLON SECUR-A-TACH MINI PLASTIC TIE 1
3810 4" NYLON CABLE TIE 5
8642 MAROON KNOB FOR AM WINE RED SERIES 6
8649 BUTTON KNOB FLAT BLACK 1
3428 8' 3/18 SJT AC LINE CORD REMOVABLE 1
3834 HEYCO #1214 STRAIN RELIEF 1
8267 SMALL TRAYNOR LOGO EMBOSSED ALUMIN. 1
8910 YORKVILLE PRODUCT MANUA
8900 YORKVILLE WARRANTY CARD 2-YR UNLTD. 1
8701 4-40 KEPS NUT ZINC 2
8800 6-32 KEPS NUT ZINC 3
8787 8-32 KEPS NUT ZINC 2
8845 10-32 PEMNUT C-1032-2-Z1 2
8898 1/4-20 CAGE NUT C79 98142027 2
3830 TO218 PREGREASED MICA 56-78-2AP 1
8581 CUSTOM PBL TRANSISTOR SPACE
4597 22AWG STRAN TC WIR JMP 7
2 4770 1/4W 249R 1% T&R RES 2
16
6 3833 8 X 3/8 (250 OD,.171 ID)NY SPACER 3
10 8468 VELCRO STRAP 3/4"X22CM (VELSTRAP) 1
2
1
1
1
1
2
1
1
Page 4
# Part# Description
Labeled Components
1 7417 8R 30W TWEETER PIEZO TLC 1
2 7331 8" 8R 50WPGM SPEAKER
3 Z276 AM50T GRILL
4 8267 SMALL TRAYNOR LOGO EMBOSSED ALU
5 8570 CORNER, 2 LEGS NOTCED LIP BLACK
1
2
4
3
6 8451 10" STRAP HANDLE,BLACK METAL EN
7 8473/8912
8 8770/8817 1/4-20 X 1 5/16 TRUSS PH MS JS500/#10 FLAT WASHER
9 3645 AC SOCKET RECEPTACLE WITH 0.250
10 8468 VELCRO STRAP 3/4"X22CM (VELSTRA
11 8547 PLASTIC FOOT BLACK, POLYETHYLEN
12 3450 1/4" JCK PCB MT HORZ, GOLD
13 8642 MAROON KNOB FOR AM WINE RED SER
14 3421/8649
15 3660 XLR FEML PCB MT HORZ
16 3698 SPST ROKR SW QUIK 180" AC PWR B
17 3428 8' 3/18 SJT AC LINE CORD REMOVA
18 3586 ACC# 1BB1C1C SHORT REVERB
19 3688 36" RCA DUAL RED-WHITE PREFAB C
20 2468 0.800 AMP SLO-BLO .25X1.25 (Internal Fuse)
21
22
#10 BLACK CUPWASHER /10-32 X 1 FLAT PHIL MS JS500 BL
DPDT PUSH SW PCMT MAKE B4 BREAK/BUTTON KNOB
5
5
8
7
9
10
6
11
12
13
14
15
16
17
4
3
18/19/20
not shown
*NOTE: Replacement grills & HF Driver supports are 'Special-Order' and are only available while the model is in production.
** Internal Lightbulb not shown
Parts-Serv-AM50T-1v0.xls ftp.yorkville.com Speaker Enclosure
Page 5
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
AB
AC
AD
AE
AF
AG
AH
1 1
C270
2 2
3 3
C4
100P 100V
R7
4 4
R4
C2
1/4W
10N 100V
5 5
J2
S TR
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
15 15
16 16
CE POWER SUPPLY
17 17
18 18
19 19
T400mA
20 20
BROWN
21 21
22 22
A
10K0
MINI
--
-
3660
J1
{Function}
J3
3
4
230VAC
2
50Hz
22n
400V
5
1
#1309E
4n7
250V
BLUE
GRN/YEL
B
C
1/4W
49K9
R8
.
1/4W
10K0
.
TL072
C6
16V33U
U1:A
.
R3
1M
1/4W
C3
100P 100V
R5
R11
1/4W
1/4W
562R
10K0
.
MINI
R19
R6
1/4W
1/4W
10K0
562R
MINI
S TR
--
-
D
.
S1
SPST Switch
F1
3414
FUSEHOLDER
E
F
C32
22N 275V
R70
1/4W
1K5
.
.
VOLUME
120R
1/4W
M
R9
10K
P1:A
4417
5B LIN
C13
1N 50V
R34
1/4W
4K99
.
MC33078P
U2:A
R49
1/4W
4K99
.
C14
1N 50V
4
XF1
#1309
120VAC
60Hz
5
C30
4N7 250V
G
100N 50V
{Function}
LD2
RED
6405
25V100U
C7
R10
1/4W
10K0
.
TL072
U1:B
R35
1/4W
1K
MINI
P5:A
GAIN
10K
.
R53
1/4W
120R
C9
16V33U
D1
3
1N5402
D2
1N5402
2
D3
1N5402
1
D4
1N5402
{Function}
LD3
GRN
6408
H
D31
4148
MINI
Q10
5105
TO92
MPSA13
R45
1/4W
4K7
{Function}
LD1
RED
6405
M
5C R/A
R52
1/4W
180K
R66
1/4W
1K5
.
I
100K
1/4W
R65
4148
D26
C10
100N 50V
R46
1/4W
M
.
C27A
100N 50V
MPSA13
.
MC33078P
U2:B
50V2200U
C25
50V2200U
C26
4K7
.
50K
P2:A
4420
B LIN
BASS
R47
1/4W
47K
.
R48
C11
1/4W
1N 50V
1K
MINI
B LIN
P4:A
4420
50K
TREBLE
M
Q10A
5105
4148
D26A
R65A
TO92
.
33K
1/4W
R18A
D10
4148
25V100U
C8
R206
R207
1/2W
1/2W
330R
330R
.
.
R204
R205
1/2W
1/2W
330R
330R
.
.
C27
R201
1/2W
330R
R202
1/2W
330R
C28
R203
1/2W
330R
.
.
R39
1/2W
330R
.
.
J
K
D60
R105
1/4W
10K
4148
.
D6
R31
1/4W
180K
4148
.
C12
15P 100V
TL072
U3:A
D25
4148
.
33K
1/4W
47N 50V
C21
.
.
4K7
R25
1/4W
47K
R33
1/4W
25V330U
ZD21W0
1N4745A 16V0
ZD31W0
25V330U
1N4745A 16V0
L
R12
1/4W
10K0
.
TLO74CN
U5:A
MINI
R40
1/4W
100K
R41
1/4W
2K49
R26
C22
1/4W
1N 50V
8K2
.
R27
1/4W
8K2
.
MC4741CP
U8:A
MC4741CP
U8:B
MC4741CP
U8:C
MC4741CP
U8:D
8
8
V+
V+
U1:C
U3:C
V-
V-
C57
100N 50V
4
4
100N 50V
C150
M
N
C100
63V 1U
MINI
R55
1/4W
100K
R14
1/4W
10K0
.
R44
C60
1/4W
M
P6:A
4419
B LIN
NOTCH
R42
1/4W
10K0
.
.
R28
1/4W
220R
.
18N 100V
10K0
.
100K
.
5K1
R43
1/4W
TLO74CN
U5:D
TO REVB INPUT
C40
100N 50V
RCA SNGL PCB MT HORZ K901
4
V+
U6:E
V-
11
C41
100N 50V
TL072
U10:A
P
J5
6541
100N 50V
C152
R29
1/4W
220R
.
R30
1/4W
220R
.
R32
1/4W
220R
.
8
4
V+
V+
U2:C
U5:E
V-
V-
C44
100N 50V
4
11
C58
100N 50V
TL072
U3:B
O
C121
63V 2U2
M
P6:B
4419
100K
B LIN
NOTCH
TLO74CN
U5:B
R50
1/4W
4K7
.
C62
470N 63V
C15
180N 63V
TO REVB OUTPUT
J6
RCA SNGL PCB MT HORZ K901
8
4
V+
V+
U7:C
U8:E
V-
V-
C42
100N 50V
4
11
C50
100N 50V
C151
100N 50V
TLO74CN
U6:B
Q
R
NOTCH
S2:B
3436
R161
1/4W
100K
MINI
R80
1/4W
10K0
.
R82
1/4W
10K0
.
R81
C61
1/4W
18N 100V
10K0
.
TLO74CN
U5:C
R83
1/4W
15K
.
C63
100N 100V
R89
1/4W.10K0
R16
1/4W
1K5
.
6541
.
10K
R18
1/4W
8
V+
U10:C
V-
C45
100N 50V
4
C43
100N 50V
S
C64
2N2 400V
R84
R85
1/4W
1/4W
10K0
TLO74CN
U6:A
C16
100P 100V
R17
1/4W
68K
T
10K0
.
.
.
33R
R90
1/4W
C65
220N 63V
.
TL072
63V 2U2
U10:B
U
C66
10N 100V
R87
R86
1/4W
1/4W
2K
2K
MINI
MINI
C18
10K
5B LIN
4417
P3:A
M
REVERB
MODEL(S):-
#
DATE DESCRIPTION OF CHANGE
JAN/18/00
1
JAN/15/02
2
.
3
.
4
AUG/26/02
5
MAR/31/05
6
JUL/05/05
7
SEP/2005
8
..
9
.
10
D
11
D
12
D
13
EC2
MODEL(S):REF KNOBPART#
P1
P2
P3
P4
P5
P6
R
R
R
R
R
R
V
C1
15P 100V
R15
R1
1/4W
1/4W
10K
2K
.
MINI
R2
1/4W
TLO74CN
10K
.
U6:D
TLO74CN
U6:C
2N2 400V
C67
.
4K7
R51
1/4W
M571 Database History
AM50
VER#
ADD POT CHART
3.00
4.00
PC#6250 MOVE C2 AWAY FROM J2. PC#6177 MOVE RED
.
LED. NEW SOLDERMASK FOR TABS. PC#6484 NEW DRILL
AND MASK FOR RCA JACKS
.
5.00
MAKE ALL LED LEADS THE SAME LENGTH
6.00
PC#6867 REDO SOLDERMASK
MAKE CE COMPLIANT FOR AC CLEARANCES
7.00
8.00
CONVERT TO PCAD2002
PC#7125 RCA JACKS #3914 TO #6541
PC#7094 SWITCH #3421 TO #3436
.
V
N
V
N
N
V
M571 POT LIST
AM50
W
FUNCTION
VOLUME
BASS
REVERB
TREBLE
GAIN
NOTCH
F
F
F
F
F
F
AS OF
SEP/05
#8641
#4417
N
.
#4420
N
.
#4417
N
.
#4420
N
.
#4418
N
.
#4419
N
K
P
N
K
P
N
K
P
N
K
P
N
K
P
N
K
P
X
C55
330N 63V
63V1U
C23
C19
180N 50V
.
10K
R101
1/4W
R103
1/4W
10K
.
68N 50V
C68
.
10K
R91
1/4W
MINI
1/4W
100K
R13A
680P 50V
C15A
Y
Z
C51
100P 100V
C56
100P 100V
R61
1/4W
4K99
R60
.
1/4W
20K0
MINI
TL072
U7:B
R62
R59
1/4W
1/4W
4K99
20K0
R100
1/4W
.
MINI
10K
.
TL072
U7:A
C17A
63V 10U
1K
MINI
1/4W
R20A
680P 50V
C16A
25V 100U
C18A
"STYLE_P27"
LM3876T
V+
V-
NC
NC
NC(+)
OUTPUT
AA
AB
AC
-
--
LINE OUT
ST R
LM3876T
R22A
1/4W
15K
.
U4
"STYLE_P28"
2N5401
2N5551
MPSA06
MPSA13
MPSA43
MPSA56
MPSA63
BC
E
TO-92
AD
R64
1/4W
249R
.
1U 63V
C21A
R23A
J4
D5A
4007
+
220N 63V
C23A
-
.
.
10R
10R
1/2W
1/2W
R25A
1U 63V
C22A
6889_PC
6882_PC 6840_PC
Product
Product
AM50
AM50
Date:
Fri Oct 20, 2006
Date:
Fri Oct 20, 2006
M571-8V00sch.sch2002
M571-8V00sch.sch2002
Filename:
Filename:
AE
AF
R24A
5.0W
33R
_SP1
{Value}
#7322
8"
8R
.
_SP2
+
{Value}
-
#7415
3.75"
4R
6798_PC
M571
M571
PCB# of
PCB# of
Rev:
Rev:
AG
Sheet 1
Sheet 1
8V00
8V00
AH
R63
1/4W
249R
.
2
NC1
6
NC2
11
NC3
ZD4A0W5
1N5246B 16V0
.
10K
1/4W
R21A
987654321
11
10
NC
GND
MUTE
V_IN-
V_IN+
2
2
Page 6
7331 8" 8 OHM JENSEN
7415 LESON
ETCH
GUIDE
BLK
ROUTE
GAGE
0.01"/HOLE
T
R
V
4N7
250V
6451
C30
T
V
C32
6435
22N
T
R
275V
V
TAB1
BLK
TAB3
W2BLK
TAB2
TO AC SW
BLK
TO AC SW
W1
NA 0.8A 250V SB
CE T400MA 250V
REPLACE WITH SAME
VALUE FUSE
R64
W6
8
0
4
6
AC COMMON
TAB4
AC HOT
F1
3414
N
E
E
-
R
G
+
3
D
L
YEL
3601
BlankSize - 12250x7950
.005"
.008"
ETCH
.012"
GUIDE
.020"
SOCKET
SOCKET UPSIDE DOWN
NORMAL
NORMAL LARGE
SOCKET WITH DIRECTION
TAB
3601
Pcb Mech
W7
3417
M571
R21A
10K
100U
25V
C18A
BEC
LOC
RCA
6541
G3
G1
G2
TO REVB INPUT
J5 J6
SIG
R28
R30
R29
R32
220R
220R
220R
220R
MC4741CP
1K5
R70
R105
10K
MPSA13
Q10
4148
100K
100N
C270
4148
.005"
.008"
.012"
W3
.020"
W4
R8
D31
D26
R65
R3
J
2
1M
-
-
7
-
6
RCA
6541
G3
G1
G2
SIG
C22
1N
R26
8K2
8K2
R27
X39X9X38
X45
47K
100P
C3
C2
R33
D6
4148
R7
49K9
10K0
R4
D
E
R
2
D
L
V
100U
B
O
5
TL072
33U
16V
25V
C7
O
T
L
B
L
R10
U1
10K0
C6
X8
4K7
120R
R9
4
4
1
7
R45
1
0
K
P
1
T
O
P
W
I
P
U
M
E
I
N
U8
R31
180K
C4
100P
10K0
10N
-
+
4
0
5
TO REVB OUTPUT
C21
47N
100N
C10
X37
R46
100N
100N
C42
C57
4148
4K7
100N
C50
B
X35
X36
R39
R203
R202
1/2W
330R
1/2W
1/2W
330R
330R
R25
180N
4K7
10K
1K5
C23
180N
C16
R16
R18
C15
D60
R44
X7
U3
TL072
C150
100N
R47
47K
4
4
2
5
0
K
P
2
B
O
T
W
I
P
A
S
S
B
L
I
N
R12
10K0
10K0 100P
18N
C60
C12
R48
X3
X2
15P
1K
1N
C11
0
T
O
P
8V00
LM3876T
6755
ZD4A
X32
16V0
C21A
1U
1U
C22A
C28
R201
16V0
1/2W
330R
ZD3
R17
U10
68K
TL072
X40
U5
R50
X6
TLO74CN
4K7
X5
R55
2K49
R41
1U
C100
100K
63V
4
4
2
0
5
0
K
P
4
B
O
T
T
O
P
W
I
P
T
R
E
B
L
E
B
L
I
N
MUTE
IN+
NC1
NC2
V-
V+A
OUT
GND
NC3
IN-
V+B
U4
4007
680P
C16A
D5A
330U
25V
X34
25V
330U
16V0
330R
ZD2
C27
C18
2U2
63V
100N
100N
C43
X42
C45 X31
R85
X11
R43
5K1
10K0
R42
X4
W
I
P
C64
R40
R80
2N2
10K0
R90
10K0
100K
100N
33R
10K0
C63 X43
18N
R89
10K0
10K0
C61
C65
220N
R82
R81
A
B
O
T
A
N
R161
63V
2U2
X12
100K
C121
R14
10K0
4
4
1
9
1
0
0
K
P
6
B
O
T
B
T
O
P
B
W
I
P
B
T
O
P
A
O
T
C
H
B
L
I
N
C17A
680P
100K
1K
10U
63V
R13A
C15A
R20A
R207
R206
R205
R204
1/2W
1/2W
1/2W
1/2W
330R
330R
330R
X30X46
X44
X110
X41
X14
2K
R84
R83
R86
U6
15K
10K0
TLO74CN
C62
470N
100N
C40
3436
S2
NOTCH
J3
GND
W5
C23A
220N
10R
R25A
1/2W
R23A
10R
1/2W
X10A
15K
R22A
X25
X27
2200U
50V
10K
R91
68N
X13
C25
R
X28
X29
R
2200U
C26
50V
C68
R15
C41
C66
X15
10N
C1
10K
X16
15P
X18
100N
2K
X50
2N2
R87 X1
C67
D10
2K
R1
X19
R2
10K
1K
R35
4148
C14
R34
C13
R18A
4148
33K
MPSA13
33K
Q10A
R65A
D26A
-
-
7
-
100N
C27A
4148
+
1N
RED
R19
10K0
6405
1N
4K99
R6
562R
3
2
6
3
1
J
D25
R11
10K0
LD1
-
X24
X26
T
T
R
V
V
T
V
T
R
V
X20
X21
R49
R5
X101
4K99
562R
33U
16V
C9
1
60
SPKR (-)
TAB8
BLACK
SEC GND
TAB5
X47
C44
U2
MC33078P
100N
100N
4
O
B
W8
3417
X75
XFMR SEC
R52
180K
C58
120R
R53
25V
100U
C8
8
1
4
K
0
1
5
P
P
O
T
T
P
I
W
N
I
A
G
A
/
R
C
5
SPKR +
C51
X23
TAB9
RED
TAB6
100P
RED
33R
5.0W
R24A
TWEET +
TAB10
YELLOW
AM50
M571
8V00
D1
D2
6827
6827
BAR DOWN
BAR DOWN
1N5402
1N5402
RED
D4
D3
6827
330N
10K
6827
BAR DOWN
1N5402
1N5402
X60
C55
X48
TL072
R59
20K0
100N
C152
U7
R62
4
J
R66
1K5
7
1
4
4
K
0
1
3
P
P
O
T
T
O
B
P
I
W
B
R
E
V
E
R
N
I
L
B
5
BAR DOWN
C19
1U
63V
R100
R101
10K
100N
C151
R103
R51
4K7 10K
TAB7
4K99
N
I
L
XFMR SEC
R60
20K0
E
-
-
R
TO XFMR
RED
R61
R63
C56
4K99
100P
249R
249R
T
U
O
7
-
CLINCH
ORIGIN
SHORT AXIS
INSERT
ORIGIN
VCD
LONG AXIS
.005"
.008"
ETCH
.012"
GUIDE
.020"
Top Assy M571
SEE LAYOUT DOCUMENTATION
8V00
Page 7
SEE LAYOUT DIAGRAM
MODEL(S):-
#
DATE
1
JAN/18/00
2
JAN/15/02
.
3
4
.
5
AUG/26/02 MAKE ALL LED LEADS THE SAME LENGTH
MAR/31/05 6.00
6
7
JUL/05/05
8
SEP/2005
..
9
10
..
11
D
D
12
13
D
AM50
VER# DESCRIPTION OF CHANGE
3.00
ADD POT CHART
4.00
PC#6250 MOVE C2 AWAY FROM J2. PC#6177 MOVE RED
.
LED. NEW SOLDERMASK FOR TABS. PC#6484 NEW DRILL
.
AND MASK FOR RCA JACKS
5.00
PC#6867 REDO SOLDERMASK
7.00
MAKE CE COMPLIANT FOR AC CLEARANCES
8.00
CONVERT TO PCAD2002
PC#7125 RCA JACKS #3914 TO #6541
PC#7094 SWITCH #3421 TO #3436
V
N
V
N
V
N
Mnnnn Drilling History
M571 Database History
MODEL(S):-
#
DATE
D
1
D
2
D
3
D
4
DN
5
DV
6
D
7
D
8
DV
9
D
10
D
11
D
12
D
13
{MODEL}
VER# DESCRIPTION OF CHANGE
V
N
V
N
V
N
V
N
V
N
V
N
V
N
N
V
N
V
N
V
N
V
N
MODEL(S):-
FUNCTION KNOBREF
VOLUME
P1
BASS
P2
REVERB
P3
TREBLE
P4
GAIN
P5
NOTCH
P6
F
R
F
R
F
R
F
R
F
R
F
R
"STYLE_P27"
M571 POT LIST
AM50
PART#
#8641
#4417
.
#4420
.
#4417
.
#4420
.
#4418
.
#4419
K
P
K
P
K
P
K
P
K
P
K
P
"STYLE_P28"
AS OF
SEP/05
N
N
N
N
N
N
N
N
N
N
N
V+
LM3876T
NC
OUTPUT
PRODUCTION NOTES:
1. DO NOT CUT THE LEADS FOR D1,D2,D3 AND D4
BEND THE LEADS OVER AND LAY FLAT ON PCB
TL074CN
1
2N5401
2N5551
MPSA06
MPSA13
MPSA43
MPSA56
MPSA63
987654321
11
10
ECB
NC
V-
NC(+)
NC
GND
MUTE
V_IN+
V_IN-
TO-92
3
42+V1-V
5
6
2 3
7
TL072CN
1
A
3
42-V
4
+V68
B
MC4741CP
1
14
13
12
11
10
9
8
1
2
3
VCC VEE
4
5
6
2
7
14
4
13
12
11
10
9
3
8
MC33078P
1
7
3
42-V
5
+V68
A
7
B
5
Page 8
Block Diagram for AM50T
DESIGNED AND MANUFAC TU R E D B Y Y O R K V I L L E S O U N D
Channel Inputs
Channel 1
Unbalanced
Stereo 1/4"
XLR
Balanced
Channel 2
Balanced
Stereo 1/4"
In 1
In 2
Input 1 Gain Pot
Input 2 Gain Pot
EQ
Low / High
Channel 1
Clip LED
Reverb Gain Stage
Notch Filter
Buffer
OUT
IN
Channel 2
Clip LED
Notch
Reverb
Send
RCA
Contour Filter
Reverb
Return
RCA
Reverb Gain Stage
Reverb
Pot
AMP
Speaker Outputs
Tweeter
8 Ohms
+
+
8 Ohms
BLOCK-DIAG-AM50T-1v1.eps
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