Yorkville AM50 Service Manual

Page 1

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ACOUSTIC MASTER

WEB ACCESS: http://www.yorkville.com

WORLD HEADQUARTERS
CANADA U.S.A.
Yorkville Sound Yorkville Sound Inc.
550 Granite Court 4625 Witmer Industrial Estate
Pickering, Ontario Niagara Falls, New York
14305 USA

L1W-3Y8 CANADA

Voice: (905) 837-8481 Voice: (716) 297-2920
Fax: (716) 297-3689

Fax: (905) 837-8746
TYPE: AM50

7: SERVICE MANUAL

Yorkville

Yorkville

Quality and Innovation Since 1963

Printed in Canada

Page 2

IMPORTAN

i : AUTION A S

MKOFELECTIIDSHDCK
DONOTOPEN

WWWOCELEM
NEPASONRIR

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 Owners Manual should 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.

H aza rds:

Do not place this product on an unstable can, stand, tripod, bracket or
table. The product may fall, causing serious personal injury and serious
damage to the product. Use onty with cart, stand, tripod, bracket, or table
recommended by the manufacturer or sold with the product Follow the
manufacturers instnrctions 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.

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.

Se rvi ce:

The unit should be serviced only by qualified service personnel.

SAFE,V4.doc Version 4.0 02/11/99 11:54 AM

Yorkville

INSTRUCTIONS RELATIVES AU RISOUE
DE FEU, CHOC ELECTRIQUE, 0U
BLESSURES AUX PERSONNES.

A VIS

N'ENLEVEZ PAS LE COUVERT (OU LE PANNEAU
ARRIERE). NE CONTIENT AUCUNE PIECE REPARABLE

PAR L'UTILISATEUR.

CONSULTEZ UN TECHNICIEN Q ALIFIE
POUR L'ENTRETIENT.

Veuillez lire le manuel:

ll oontient des infon'nations qui devraient éh'es comprises avant
l'opération de votre appareil. Conservez S.V.P. oes instructions
pour consultations ultén'eures

Emballage:

Conservez la boite au cas ou l'appareil devait étre
retourner pour reparation.

Warning:

Attention: Lors de l'utilisation de produits électrique,

assurez-vous d'adhérer a des precautions de bases
incluant celle qui suivent:
Alimentation:
L'appareil ne doit étre branché qu'a une source d'alimentation
correspondant au voltage specifié dans le manuel on tel qu'indique
sur l'appareil. Cet appareil est equipe d'une prise d'alimentation
polarisee. Ne pas utiliser cet appareil avec un cordon de
raccordement a mains qu'il soit possible d'inserer completement les
trois lames. Des precautions doivent étres prises afin d'eviter que le
systeme de mise a la terre de l'appareil ne soit desengagé.
Haza rd :
Ne pas placer oet appareil sur un chariot, un support, un trepied ou une
fable instables. L'appareil pourrait tomber et blesser quelqu'un ou subir des
dommages importants. Utiliser seulement un chariot, un support, un trepied
ou une table recommandes par le tabricant cu vendus avec le produit.
Suivre les instructions du fabricant pour installer lappareil et utiliser les
accessoires recommandés par le fabricant.

ll convient de ne pas placer sur l'appareil de sources de flammes
nues, telles que des bougies allumées.

L'appeil ne doit pas étre expose a des égouttements d'eau ou des
éclaboussures et qu'aucun obiet rempli de liquide tel que des vases
ne doit étre place sur l'appareil.

Les dispositifs marques d'une symbole d'eclair sont des parties
dangereuses au toucher et que les cablages extérieurs connectés a
ces dispositifs de connection exterieure doivent étre effectives par un
operateur forme ou en utilisant des cordons deja prepares.
Cordon d'alimentation:

Evitez d'endommager [e cordon d'alimentation. N'UTILISEZ PAS
L'APPAFtEIL si le cordon d'alimentation est endommage.

Se rvi ce:

Consultez un technicien qualitié pour l'entretien de votre appareil.

AMSO

Acoustic Amplifier

applicable 10 serial numbers 001xxxx

parts-am50.x|s - 10/23/00

Notes:

3414

INTERNATIONAL PC MOUNT FUSEHOLDER

2468

0.800 AMP SLO-BLO .25X1.25 FUSE

8459

9.5" STRAP HANDLE. PLASTIC COVERS

8604

1032 T NUT

7417

8R 30W TWEETER PIEZO TLC 1

3745

DUAL XSISTOR PBL SPRING PLATE ZN

3804

SNAP ON 15" INSULATING BUSHING

3795

#8 GROUND LUG ZIERICK 5054 69

3801

5/8" BUMPER BUTTON BLACK

3803

NYLON SECUR~AvTACH MINI PLASTIC TIE

3810

4" NYLON CABLE TIE

8641

AQUA KNOB FOR "NEW" ACOUSTIC SERIE

8649

BUTTON KNOB FLAT BLACK

3481

8' 3/18 SJT AC LINE CORD 250 CLIPS

3834

HEYCO #1214 STRAIN RELIEF

"Y" LOGO ACOUSTIC SERIES SML. DOMED

8800

632 KEPS NUT ZINC

8787

882 KEPS NUT ZINC

8845

1032 PEMNUT SS7032»2~Z1

8898

1/4-20 CAGE NUT C7998142027

3830

T0218 PREGREASED MICA 58-78-2AP

8581

CUSTOM PBL TRANSISTOR SPACER

4597

22AWG STRAN TC WIR JMP

4599

22AWG SOLID SC WIR T&R JMP

B

5299

24AWG SOLID SC WIR RAD JMP

4675

1/2W10R 5% T81RRES

4816

1/4W 33R 5% T&R RES

4704

5.0W 33R 5% ELK RES

4897

114W 120R 5% T&R RES

It Part# Description Function
eied Components
1 3450 1/4ICK PCB MT HORZ, GOLD Iack "50 0012012000
2 4417 _10K 58 LIN QMM HORIZONTAL P28 Gainl YS No. Description Qty. VS No. Description Qty.
3 4420 50K BUN gMM HORIZONTAL p23 Bass 5405 RED 3MM LED1v7 5MA DRT 2" 4770 1/4W 249R 1% TAR RES 2
' 5408 ORN 3MM LEO1v9 5MA PROSTED 1 4555 1/2W 330R 5% TAR RES 8
4 4420 -50K B U QMM HORIZONTAL P23 hie 5825 1N4148 75v 0A45 DIODE TAR 7 4799 1/4W 552R 1% TAR RES 2
5 4419 100K B LIN 12MM HORIZONTAL STPZT Freq 5438 1N4004 400v 1A0 DIODE TAR 1 4981 1/4W 1K 5%MINI TAR RES 3
5827 1N5402 200v 3A0 DIODE 4 4824 1/4W 1K5 5% TAR RES 3
6 3660 XLR FEML PCB MT HORZ Ck 5822 1N4745A 15v0 1W0 ZENER 5% TAR 2 51131/4W 2K 5%M1NI TAR RES 3
7 4418 _10K 5C R/A QMM HORIZONTAL P28 Get/12 5824 1N5245D 15v0 OW5 ZENER 5% TAR 1 4883 1/4W 2K49 1% TAR RES 1
8 4417 10K 53 UN gMM HORIZONTAL m Rm, 5105 MPSA13 TO92 NPN DARL TAR TA 2 4827 1/4W 4K7 5% TAR RES 5
' 5755 LM3875T 1C 40 WATT POWER AMP 1 4539 1/4W 4K99 1% TAR RES 4
knob 85 me-""1 55 35" Aqua KW" Knob 5798 Mc4741CP IC OUAD OP AMP 1 4893 1/4W 5K1 5% TAR RES 1
9 3698 SPST ROKR SW QUIK 180 AC PWR EL/EL 5840 M033078P Ic DUAL OP AMP 1 4853 1/4W 8K2 5% TAR RES 2
5882 TI_072CP IC PET DUAL OP AMP 4 4800 1/4W mm 1% TAR RES 12
m 3421 DPDT PUSH SW PCMT MAKE 84 BREAK 5889 TI.O74CN IC QUAD O/A T.I ONLY 2 48291/4W 10K 5% TAR RES 9
10 8649 BUTTON KNOB FLAT BLACK 5402 ,15P 100v 10%CAP TAR BEAD NPO 2 5115 1/4W 10KO 1%MINI MF TAR RES 3
11 2232 AM50 Gnll (Spam! Warm/e mm m mum Only) 5199 100P 100v 2%CAP TAR RAD CER.2"NPO 2 4830 1/4W 15K 5% TAR RES 2
5410100P 100v10%CAP TAR DEAD NPD 3 5123 1/4W 20KO 1%MINIMF TAR RES 2
12 3834 HEVCO 1214 STRAIN RELIEF 5420 680P 50v10%CAP TAR DEAD NPO 2 4840 1/4W 33K 5% TAR RES 2
13 5570 CORNER, 2 LEGS NOTCED Lip BLACK 5422 71N 50v1O%CAP TAR DEAD NPO 4 48341/4W 47K 5% TAR RES 2
,, 5208 72N2 400v 5%CAP TAR RAD .2"FLM 2 4803 1/4W 49K9 1% TAR RES 1
14 B468 VELCRO STRAP 3 XZZCM (VELSTRAPI 5451 74m 250v 20%CAP BLK 'V' 10MM Ac 1 4835 1/4W 58K 5% TAR RES 1
15 3481 8 3/18 SJT AC LINE CORD 250 CLIPS 5204 JUN 100v 10%CAP TAR RAD .2"FLM 2 5120 1/4W 100K 5%MINI TAR RES 5
16 8459 951 STRAP HANDLE, PLASTIC COVERS 5207 ,18N 100v 5%CAP TAR RAD .2"FLM 2 4849 1/4W180K 5% TAR RES 2
5435 ,22N 275v 20%CAP DLK'x2' 15MM Ac 1 4844 1/4W 1M 5% TAR RES 1
17 5547 PLASTIC FOOT BLACK 5308 ,47N 50v 10%CAP TAR DEAD X7R 1 3585 ACC# 1DB1C1C SHORT REVERD 1
18 7417 SR 30W TWEETER pIEzo TLC 1 5310 ,58N 50v10%CAP TAR DEAD x7R 1 9892 CABINET COVER. BLUE/BLACK, 54"WIDE 11 5
,, 5228 100N 100v 5%CAP TAR RAD .2"FLM 1 9047 .187 HOLE @ .250 STAG 166A FERFORAT 1.4
19 7331 3 8R SDWPGM SPEAKERIENSENIAa/BO 5314 100N 50v10%CAPTAR DEAD x7R 15 9150 .081"48><96 UTILITY ALUMINUM 213
5230 180N 53v 5%CAP TAR RAD .2"FLM 1 9250 .040" 48X96 5052H32 ALUM VINYL LAMI 0.33
5317 180N 50v 10%CAP TAR DEAD x7R 1 9815 1/2"PRECISION SANDED SPRUCE 4><8 8.15
5231 220N 53v10%CAP TAR RAD .2"FLM 2 8842 114 x 5/15 PAN QUAD TYPE A IS500 BLK 2
5233 330N 53v 5%CAP TAR RAD .2"FLM 1 8801 5.32 x 3/8 PAN PH TAPTITE IS500 5
5234 470N 53v 10%CAP TAR RAD .2"I=LM 1 8829 5732 x 3/8 FLAT PH TAPTITE 80% HEA 4
5255 71U 53v 20%CAP TAR RAD .2"EL 3 8828 5732 x 3/4 PAN PH TAPTITE IS500 3
5255 71U 53v 5%CAP TAR RAD .2"FLM 2 8875 #5 x1 1/2 PAN PH TYPE A JS500 BLK 4
5257 2U2 53v 20%CAP TAR RAD TEL 1 8753 8732 x1/2 PAN PH MS JS500 BLACK 2
Internal Elec Components 5945 JOU 53v 20%CAP TAR RAD .2"EL 1 8757 #8 x 3/4 PAN PHIL TYPE A IS500 BLK 4
1309 BLOC'408/40K/40W/503 XFMR 5951 ,33U 15v 20%CAP TAR RAD .2"NP 2 8815 832 x 3/4 PAN PH TAPTITE JSSOO 1
2463 0,800 AMP swam 1511115 FUSE 5257 100U 25v 20%CAP TAR RAD .2"EL 3 8753 #10X1/2 PAN PH TVPEAJSSOO BLACK 12
5530 330U 25v 20%CAP BLK10X13MM EL 2 8755 #10 x 3/4 PAN PH TYPE A BLACK OXIDE 8
3585 AC ERICK SHORT REVERE 5887 22OOU 50v 20%CAP BLK18X27MM EL 2 8781 3110 X 7/8 FLAT PHIL TYPE A .ISSOODLK 10
3745 DUAL XSISTOR PBL SPRING PLATE ZN 4417 710K 53 LIN 9MM HORIZONTAL P28 2 8912 1032 XI FLAT PHIL MS JSSOO BLK 4
4418 10K 5c R/A 9MM HORIZONTAL P28 1 8770 1/4720 x 1 5/15 TRUSS PH MS IS500 2
3830 Tom PREGREASED MI 56'7 4420 750K E LIN 9MM HORIZONTAL P28 2 8905 YORKViLLE PRODUCT SCHEMATIc 1
5105 MPSA13 T092 NPN DARL TAR TA 4419 100K E LIN 12MM HORIZONTAL STP27 1 3833 8 x 3/8 (250 OD,.171 ID1Nv SPACER 3
588/ 220W 50V 20%CAP BLK18X27MM EL 8547 PLASTIC FOOT BLACK 8 7331 8" 8R SOWPGM SPEAKER IENSENIA8/8O 1
8570 CORNER. 2 LEGS NOTCED LIP BLACK 5 8820 #8 FLAT WASHER 35500 2
6755 LM3876T IC 40 WATT POWER AMP 3453 CLIP 110x020 18722AWG DISCO/INSL 2 8473 #10 BLACK CUPWASHER SWFrIOBK 2
6798 MC4741CP 1C QUAD 0P AMP 3457 CLIP 205x032 1445ch DISC/INSUL 2 3421 DPDT PUSH SW PCMT MAKE D4 BREAK 1
3489 CLIP 250x032 1822ch DISCO/INSL 4 3598 SPST ROKR SW QUIK180" AC PWR BL/BL 1
5327 5402 200V 3" DIODE 3582 250 MALE PCB TAD BULK CARTRIGE 10 3937 YELLOW 18 AWG TRVSA PREFUSED 2.333
5340 Magma/u 1c DUAL or: AMI: 3498 1/4" JCK PCD MT HORZ 3 3940 RED 18AWD TRvSA PREFUSED 2.333
3885 35" RCA PREFAD CADLE RED 1 3941 BLACK 18 AWG TRvSA PREFUSED 4.557
6882 on, 'C FET DUAL 0P AMP 3890 35" PREFAB. CADLE 1 3950 GREEN 18AWG TR-64 PREFUSED 2
6689 TL074CN IC QUAD O/A TI ONLY 3914 RCA SNGL PCD MT HORz 2 3958 BLACK 18AWG 35STND WIRE DOUDLE INS 3.333
8581 CUSTOM PBLTRANSISTOR SPACER 3417 5.32 SCREW TERMINAL Pc MOUNT 2 1309 BLOCvAOB/AOK/AOW/fioa XFMR 1
3550 XLR FEML PCD MT HORz 1
3451 EYELET SMALL 0.089 OD PLATED 10
2
1
1
2
1
1
1
2
1
1
5
5
1
1
1
1
3
2
2
2
1
1
7
1
2
2
1
1
2
4

ftp.yorkvi|le.com/parts

Instrument Amplifiers

4857

1/4W 220R 5% T&R RES