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ACOUSTIC MASTER
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
SERVICE MANUAL
Manual-Service-am50-1v1.pdf
TYPE: AM50
Quality and Innovation Since 1963
Printed in Canada
#
1
Part#
3450 4417 4420 4420 4419 3660 4418 4417 8641 3698 3421 8649 Z282 3834 8570 8468 3481 8459 8547 7417 7331
Description
1/4" JCK PCB MT HORZ, GOLD
Function
Jack Gain 1 Bass Treble Freq Jack Gain 2 Reverb Knob
YS No. 6405 6408 6825 6438 6827 6822 6824 5105 6755 6798 6840 6882 6889 5402 5199 5410 5420 5422 5208 6451 5204 5207 6435 5308 5310 5228 5314 5230 5317 5231 5233 5234 5255 5256 5257 5945 5961 5267 5630 5887 4417 4418 4420 4419 8547 8570 3463 3467 3489 3682 3498 3886 3890 3914 3417 3660 3451 3414 2468 8459 8604 7417 3745 3804 3795 3801 3803 3810 8641 8649 3481 3834 8800 8787 8845 8898 3830 8581 4597 4599 5299 4675 4816 4704 4897 4857 Description RED 3MM LED 1V7 5MA BRT GRN 3MM LED 1V9 5MA FROSTED 1N4148 75V 0A45 DIODE T&R 1N4004 400V 1A0 DIODE T&R 1N5402 200V 3A0 DIODE 1N4745A 16V0 1W0 ZENER 5% T&R 1N5246B 16V0 0W5 ZENER 5% T&R MPSA13 TO92 NPN DARL T&R TA LM3876T IC 40 WATT POWER AMP MC4741CP IC QUAD OP AMP MC33078P IC DUAL OP AMP TL072CP IC FET DUAL OP AMP TLO74CN IC QUAD O/A T.I ONLY _15P 100V 10%CAP T&R BEAD NPO 100P 100V 2%CAP T&R RAD CER.2"NPO 100P 100V 10%CAP T&R BEAD NPO 680P 50V 10%CAP T&R BEAD NPO __1N 50V 10%CAP T&R BEAD NPO __2N2 400V 5%CAP T&R RAD .2"FLM __4N7 250V 20%CAP BLK 'Y' 10MM AC _10N 100V 10%CAP T&R RAD .2"FLM _18N 100V 5%CAP T&R RAD .2"FLM _22N 275V 20%CAP BLK 'X2' 15MM AC _47N 50V 10%CAP T&R BEAD X7R _68N 50V 10%CAP T&R BEAD X7R 100N 100V 5%CAP T&R RAD .2"FLM 100N 50V 10%CAP T&R BEAD X7R 180N 63V 5%CAP T&R RAD .2"FLM 180N 50V 10%CAP T&R BEAD X7R 220N 63V 10%CAP T&R RAD .2"FLM 330N 63V 5%CAP T&R RAD .2"FLM 470N 63V 10%CAP T&R RAD .2"FLM __1U 63V 20%CAP T&R RAD .2"EL __1U 63V 5%CAP T&R RAD .2"FLM __2U2 63V 20%CAP T&R RAD .2"EL _10U 63V 20%CAP T&R RAD .2"EL _33U 16V 20%CAP T&R RAD .2"NP 100U 25V 20%CAP T&R RAD .2"EL 330U 25V 20%CAP BLK 10X13MM 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 100K B LIN 12MM HORIZONTAL STP27 PLASTIC FOOT BLACK CORNER, 2 LEGS NOTCED LIP BLACK CLIP 110X020 18-22AWG DISCO/INSL CLIP 205X032 14-16AWG DISC/INSUL CLIP 250X032 18-22AWG DISCO/INSL 250 MALE PCB TAB BULK CARTRIGE 1/4" JCK PCB MT HORZ 36" RCA PREFAB CABLE RED 36" PREFAB. CABLE RCA SNGL PCB MT HORZ 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 9.5" STRAP HANDLE, PLASTIC COVERS 10-32 T NUT 8R 30W TWEETER PIEZO TLC 1 DUAL XSISTOR PBL SPRING PLATE ZN SNAP ON 1.5" INSULATING BUSHING #8 GROUND LUG ZIERICK 505-169 5/8" BUMPER BUTTON BLACK NYLON SECUR-A-TACH MINI PLASTIC TIE 4" NYLON CABLE TIE AQUA KNOB FOR "NEW" ACOUSTIC SERIE BUTTON KNOB FLAT BLACK 8' 3/18 SJT AC LINE CORD 250 CLIPS HEYCO #1214 STRAIN RELIEF "Y" LOGO ACOUSTIC SERIES SML. DOMED 6-32 KEPS NUT ZINC 8-32 KEPS NUT ZINC 10-32 PEMNUT SS-032-2-Z1 1/4-20 CAGE NUT C7998142027 TO218 PREGREASED MICA 56-78-2AP CUSTOM PBL TRANSISTOR SPACER 22AWG STRAN TC WIR JMP 22AWG SOLID SC WIR T&R JMP 24AWG SOLID SC WIR RAD JMP 1/2W 10R 5% T&R RES 1/4W 33R 5% T&R RES 5.0W 33R 5% BLK RES 1/4W 120R 5% T&R RES 1/4W 220R 5% T&R RES
Labeled Components
am50 Oct 20,2000
Qty. 2 1 7 1 4 2 1 2 1 1 1 4 2 2 2 3 2 4 2 1 2 2 1 1 1 1 15 1 1 2 1 1 3 2 1 1 2 3 2 2 2 1 2 1 8 6 2 2 4 10 3 1 1 2 2 1 10 2 1 1 2 1 1 1 2 1 1 5 6 1 1 1 1 3 2 2 2 1 1 7 41 2 2 1 1 2 4 YS No. 4770 4655 4799 4981 4824 6113 4883 4827 4639 4893 4863 4800 4829 6116 4830 6123 4840 4834 4803 4836 6120 4849 4844 3586 9892 9047 9150 9250 9815 8842 8801 8829 8828 8876 8763 8767 8815 8753 8756 8781 8912 8770 8905 3833 7331 8820 8473 3421 3698 3937 3940 3941 3950 3958 1309 Description 1/4W 249R 1% T&R RES 1/2W 330R 5% T&R RES 1/4W 562R 1% T&R RES 1/4W 1K 5%MINI T&R RES 1/4W 1K5 5% T&R RES 1/4W 2K 5%MINI T&R RES 1/4W 2K49 1% T&R RES 1/4W 4K7 5% T&R RES 1/4W 4K99 1% T&R RES 1/4W 5K1 5% T&R RES 1/4W 8K2 5% T&R RES 1/4W 10K0 1% T&R RES 1/4W 10K 5% T&R RES 1/4W 10K0 1%MINI MF T&R RES 1/4W 15K 5% T&R RES 1/4W 20K0 1%MINI MF T&R RES 1/4W 33K 5% T&R RES 1/4W 47K 5% T&R RES 1/4W 49K9 1% T&R RES 1/4W 68K 5% T&R RES 1/4W 100K 5%MINI T&R RES 1/4W 180K 5% T&R RES 1/4W 1M 5% T&R RES ACC# 1BB1C1C SHORT REVERB CABINET COVER, BLUE/BLACK, 54" WIDE .187 HOLE @ .250 STAG 16GA PERFORAT .081" 48X96 UTILITY ALUMINUM .040" 48X96 5052H32 ALUM VINYL LAMI 1/2"PRECISION SANDED SPRUCE 4X8 #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 #6 X 1 1/2 PAN PH TYPE A JS500 BLK 8-32 X 1/2 PAN PH MS JS500 BLACK #8 X 3/4 PAN PHIL TYPE A JS500 BLK 8-32 X 3/4 PAN PH TAPTITE JS500 #10 X 1/2 PAN PH TYPE A JS500 BLACK #10 X 3/4 PAN PH TYPE A BLACK OXIDE #10 X 7/8 FLAT PHIL TYPE A JS500BLK 10-32 X 1 FLAT PHIL MS JS500 BLK 1/4-20 X 1 5/16 TRUSS PH MS JS500 YORKVILLE PRODUCT SCHEMATIC 8 X 3/8 (250 OD,.171 ID)NY SPACER 8" 8R 50WPGM SPEAKER JENSENJA8/80 #8 FLAT WASHER JS500 #10 BLACK CUPWASHER SWF-10BK DPDT PUSH SW PCMT MAKE B4 BREAK SPST ROKR SW QUIK 180" AC PWR BL/BL YELLOW 18 AWG TR-64 PREFUSED RED 18 AWG TR-64 PREFUSED BLACK 18 AWG TR-64 PREFUSED GREEN 18 AWG TR-64 PREFUSED BLACK 18AWG 36STND WIRE DOUBLE INS BLOC-40B/40K/40W/50B XFMR Qty. 2 8 2 3 3 3 1 5 4 1 2 12 9 3 2 2 2 2 1 1 5 2 1 1 11.5 1.4 2.13 0.33 8.16 2 5 4 3 4 2 4 1 12 8 10 4 2 1 3 1 2 2 1 1 2.333 2.333 4.667 2 3.333 1
IMPORTANT SAFETY INSTRUCTIONS
2
_10K 5B LIN 9MM HORIZONTAL P28 _50K B LIN 9MM HORIZONTAL P28 _50K B LIN 9MM HORIZONTAL P28 100K B LIN 12MM HORIZONTAL STP27 XLR FEML PCB MT HORZ _10K 5C R/A 9MM HORIZONTAL P28 _10K 5B LIN 9MM HORIZONTAL P28 Note: All pots use 8641 Aqua Knob SPST ROKR SW QUIK 180" AC PWR BL/BL DPDT PUSH SW PCMT MAKE B4 BREAK BUTTON KNOB FLAT BLACK AM50 Grill (special order while unit is in production only) HEYCO #1214 STRAIN RELIEF CORNER, 2 LEGS NOTCED LIP BLACK VELCRO STRAP 3/4"X22CM (VELSTRAP) 8' 3/18 SJT AC LINE CORD 250 CLIPS 9.5" STRAP HANDLE, PLASTIC COVERS PLASTIC FOOT BLACK 8R 30W TWEETER PIEZO TLC 1 8" 8R 50WPGM SPEAKER JENSENJA8/80
applicable to serial numbers 001xxxx
3 4 5 6 7 8 knob 9
INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.
INSTRUCTIONS RELATIVES AU RISQUE DE FEU, CHOC ÉLECTRIQUE, OU BLESSURES AUX PERSONNES.
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.
10 10 11 12 13 14 15 16 17 18 19
CAUTION:
AVIS:
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CONSULTEZ UN TECHNICIEN QUALIFIE POUR L'ENTRETIENT.
Read Instructions: Packaging: Warning:
The Owner's Manual should be read and understood before operation of your unit. Please, save these instructions for future reference. Keep the box and packaging materials, in case the unit needs to be returned for service. When using electric products, basic precautions should always be followed, including the following:
Veuillez lire le manuel: Emballage: Warning:
Il contient des informations qui devraient êtres comprises avant l'opération de votre appareil. Conservez S.V.P. ces instructions pour consultations ultérieures Conservez la boite au cas ou l'appareil devait être retourner pour réparation. Attention: Lors de l'utilisation de produits électrique, assurez-vous d'adhérer à des précautions de bases incluant celle qui suivent:
1309 2468 3586 3745 3830 5105 5887 6755 6798 6827 6840 6882 6889 8581
BLOC-40B/40K/40W/50B
Internal Electronic Components
XFMR
0.800 AMP SLO-BLO .25X1.25 FUSE ACC# 1BB1C1C SHORT REVERB DUAL XSISTOR PBL SPRING PLATE ZN TO218 PREGREASED MICA 56-78-2AP MPSA13 LM3876T TO92 NPN DARL T&R TA IC 40 WATT POWER AMP 2200U 50V 20%CAP BLK 18X27MM EL 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
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.
Alimentation:
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. No naked flame sources, such as lighted candles, should be placed on the apparatus.
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.
CUSTOM PBL TRANSISTOR SPACER
Hazard:
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.
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. 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.
Notes:
Service:
Cordon d'alimentation: Service:
The unit should be serviced only by qualified service personnel.
Évitez d'endommager le cordon d'alimentation. N'UTILISEZ PAS L'APPAREIL si le cordon d'alimentation est endommagé. Consultez un technicien qualifié pour l'entretien de votre appareil.
SAFE_V4.doc Version 4.0 02/11/99 11:54 AM
parts-am50.xls - 10/23/00
ftp.yorkville.com/parts
Instrument Amplifiers
Block Diagram for AM50
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 1 Clip LED Channel 2 Clip LED
Channel Inputs
Input 1 Gain Pot
Speaker Outputs
EQ Tweeter 8 Ohms OUT Contour Filter Notch IN AMP +
Low / High Channel 1 Unbalanced
In 1
Notch Filter
Stereo 1/4" +
8 Ohms
XLR Balanced Input 2 Gain Pot
Reverb Gain Stage
Channel 2 Balanced In 2 Stereo 1/4" Buffer
Reverb Send RCA
Reverb Return RCA
Reverb Gain Stage
Reverb Pot
BLOCK-DIAGRAM-AM50-1V4 .ai
C:\ADATA\block diagrams\BLOCK-DIAGRAM-AM50-1V4.ai 18-JUL-2003 SE
CLIP +16V R70 1K
RED
C27 100N Q10 A13
D31 D26 R65 100K
LED2
LG
R105 10K
D60 R60 C100 1U 63V NOTCH R55 100K SG 10K0
OUT
C56 100P R61 6 5 4K99 7 U7 TL072 R62 4K99
2/2
6
T
4
R
2 NO_GOLD
S
CHANNEL 1 INPUT R8 SG 100MVRMS JB2 MONO 1
S
C4 100P R7 49K9 2 3 R3 1M SG SG 6 5 SG CLIP +16V R35 1K
RED
20K0 SW1 C1 15P C55 330N SG R59 20K0
LINE-OUT JB4
1Vrms
R63 249R R64 249R
R31 33K 1 C6 33U 16V R9 120R VOLUME 10K
CW
10K0
D6
C121 2U2 63V
5
3
1
IN
LINE OUT
C2 10N 3
R
R161 100K SG R1 2K R2 10K C61 18N 9 10 SG R83 15K 2 3 R89 10K0 SG U6
1/4
5
T
R4 10K0
U1
NO_GOLD 2
4
6
C3 100P
TL072
1/2
R45 C7 16V 100U 4K7 BASS
C10 100N 50K
CW
R15 13 12 SG 10K 14 U6 TL074 C23 180N
4/4
LG
R46 4K7 R47 C12 15P 1 U3 TL072 SG
1/2
5B P1 R10 10K0 7 U1 TL072
2/2
B P2
10K0 R14 R12 2 3 10K0 1 U5 TL074
1/4
R80 100K CW D B P6 7
2/4
10K0 R82 C60 18N R81 10K0 U5
IG
TREBLE B P4
CW
47K C11 R48 1N 1K
2 3
100K
CW
B NOTCH
D P6
R44 10K0 6 5 SG R43 5K U5
C19 16V 1u R101 10K C51 100P R100
NOTCH
8
3/4
50K
TL074 R50 4K75
TL074
C27A 100N Q10A A13 D26A
R40 100K D25 SG R65A 33K LG R41 2K49 13 12 SG R42 10K0 U5
4/4
C64 2N2 1 TL074 R84 10K R85 10K R90 33R C65 220N . SG R86 2K
C66 10N R87 2K
9 10 U6 C67 2N2 . SG
3/4
8 TL074
R103 10K SG
2 3
10K 1 U7 TL072
1/2
LED1
14
C62 470N
C63 100N
CHANNEL 2 INPUT JP4 3mVrms 2 MIC_IN 3 NUTRIX 1 R11 10K0 1
S
TL074 R18A 180K D10A C13 1N R5 562R 2 3 R6 562R R34 4K99 1 U2 33078 R49 4K99 C14 1N SG
1/2
VOLUME2 10K
CW
5C P5 120R R53 33U C9 16V 6 5 R52 180K 7 U2 33078
2/2
IG
C8 16V 100U
R26 8K2 2 C21 47N R25 4K7 SG R33 47K SG 9 10 13 6 5 3
C22 1N R27 8K2 U8
1/4
+35VDC
REVERB TANK #3586 6 1 R28 220R REV_SEND J11 2 1 RCA R30 220R NOTES: ALL UNMARKED DIODES ARE 1N4148 AC VOLTAGES MEASURED AT 1KHz AND WITH VOLUMES AT 10, TONES AT 0 C45 100N C43 100N C42 100N C50 100N C57 100N C150 100N C44 100N C58 100N SG SG +16V SG -16V SG SG C15 180N SG R16 1K5 REV_RTN J10 6 2 5 10K R18 5 C16 100P R17 68K 7 U10 TL072 P3 10K
CW 2/2
C68 7 U3 TL072
2/4
2 3 U10
1/2
68N 1 TL072 R91 10K
10U 63V C17A
BOG R20A 1K
9 1
POLY C21A 50V 1U BOG R22A 15K
5 3 7 10 8
100mvrms
JP3 MONO
3
R
5
T
R19 10K0
1N4004 D5A R24A POLY C23A 40V 220N 10R R25A
0.5W 5W
MC4741 7 U8 MC4741 8 U8 MC4741
3/4 2/4
C16A C18 2U2 680P 16V 5B REVERB BOG BOG SG 4K7 R51 R13A 100K C15A 680P
NO_GOLD 2
4 IG
6
U4
4
R29 220R
LM3876
33R
8R 8" #7322
RCA 1
BOG 16V 1N5246B ZD4A 100U 25V C18A BOG 10K R21A POLY C22A 50V 1U
10R R23A
0.5W
#7415 3.75" 4R
BOG
-35VDC
+35VDC 330R D1 RED EXPORT 230Vac 50Hz #1309E T1 BLK T1 120Vac AG 60Hz 400V C90 BLK 22n #1309 RED 1N5402 D2 1N5402 D3 1N5402 D4 1N5402 C91 4n7 250V GREEN WHITE LED3 AG
RED
0.8A-SB
12 R206 330R
0.5W
14 U8 MC4741
4/4
R32 220R
330R
R204 C25 40V 2200U
AG
0.5W
R207 330R R205
SG 0.5W
0.5W
+16V 16V 1N4745A ZD2 16V 1N4745A ZD3
C27 25V 330U C28 25V 330U
C152 100N C151 100N
C40 100N C41 100N
400V
SW1
250V 4n7
F1
YEL
C32 22n
AG
AG
C26 40V 2200U R201 330R R202
0.5W 0.5W
SG
330R R203 330R R39
0.5W 0.5W
-16V PIN OUTS PIN 1
F1
330R 1K5 R66 -35VDC
GRN/YEL
BLACK
LM3876T
10 11 4 5 6 7 8 9
MPSA43 MPSA56
BC550C BC560C
2N5638
EBC
V+ NC VOUTPUT NC NC GND NC(+) MUTE V_INV_IN+
CBE
DSG
STYLE "P27"
STYLE "P28"
1 2 3 4 5 6 7 8 9 10
MODEL(S):# DATE
JAN/18/00 MAY/03/00 MAR/22/01 OCT/06/03 D D D D D D
AM50 VER# DESCRIPTION OF CHANGE
1.20 1.30 1.40 1.50 V V V V V V
M571.SCH_DATABASE_HISTORY
ADD_HISTORY/POT_BLOCKS UPDATE_CE_PWR-SUPPLY PC#6358_E_VERSION_XFMR_#1206->1309E CORRECT_POLARITY_OF_HORN N N N N N N DATE: OCT/06/2003 MODELS: PCB#&VER: AM50 M571
1 2 3 4 5 6 7 8 9 10
MODEL(S):# REF
P1 P2 P3 P4 P5 P6 D D D D
VOLUME BASS REVERB TREBLE GAIN NOTCH F F F F
AM50 FUNCTION
M571.PCB_POT_LIST
#4417 #4420 #4417 #4420 #4418 #4419 N N N N 1 OF
T400mA
PART#
#8641 . . . . . K K K K
KNOB
JAN/2000 . . . . . D D D D 1.50
AS_OF
BROWN
1
BLUE
2 3
SHEET
1
SCH ISSUE:
YORKVILLE
NAME: M571.SCH
TITLE: AM50_ACOUSTIC_AMP
INPUT
OUTPUT
TO REVB INPUT
R29 R28 R30
100N
C27 D26 D31
RED
. RCA_JACK
WC10 WC6 R3
4148 4148
RIGHT 10K 1K5
MPSA13
PART#3914 JB11 1N 8K2 8K2
JB2
100K
R65 Q10 R8 C4 R7
R32
220R 220R 220R 220R
+
MC4741
VOLUME 10N C2
BOT
WIP
JAN/18/00 JAN/15/02 . . . AUG/26/02 D D D D D
TOP
BOT
WIP
TOP
P2
BOT
WIP
TOP
MODEL(S):- AM50 # DATE VER# DESCRIPTION OF CHANGE
TOPA WIPB BOTA TOPB BOTB WIPA
P6
VCD
C3
4148
4417
3.00 4.00 . . . 5.00 V V V V V
10K 5B BASS
R45 C57 C21 R46
C10
100N
J2 4420 C150 J3 U3 R18 R44 R16 C16 R17 -16V R12 J40 R50 C15 180N
RED
LED2
P1
R4 R27 R26 C22 C6 U1 J45 J39 R33 J9 J38 C42 C50 C23 R25 R39 R203 R202 R201 U8
100P 10K0 JB10 PART#3914 BLK . RCA_JACK 33u 16V 100U 25V 4K7 100N 47N
4148
D60 J7
10K0 100P 49K9
180K
C7
10K0
R10
TLO72CN
120R
R9 D6
47K TO REVB OUTPUT J37 J36 J35
CDV83- CDV83+
100N 4K7 47K
J8 R47
TLO72
100N 100N 180N 4K7
50K B
C11 R48 C12 R55 J6 18N C60
10K0 10K0 4K7
J5
10K 1K5 100P 68K
100U 25V
TREBLE
R21A
10K
ZD4A
1N 1K 15P 100K 63V 1U
330R 0.5W 330R 0.5W 0.5W 330R 0.5W 330R 16V/1W
16V
4420 C100
1U
ZD3 C22A J32
TLO72
2K49
50K B TLO74
R42 C43 C45 R81 J11 R43 R40 R80 U10
U5 100N 100N 63V 2U2
R41
-38VDC
J34 C28
D5A
1U
1N4004
C21A
M571.PCB_DATABASE_HISTORY
#6755
10K0
R14 C61 R82 18N C121 J12 C65 220N R90
10K0 10K0 5K1 100K 10K0 33R 10K0 10K0
R85 2N2 R84 R83 +16V R89 C64 100N 470N U6 J41 SG C62 C18
LM38x6
B 100K 4419 PART#
10K0
C27
330U 25V
330U 25V
J31
U4
16V/1W
J42 J43 R205 R207 +16V R206 C16A ZD2
ADD_POT_CHART PC#6250_MOVE_C2_AWAY_FROM_JB2 PC#6177_MOVE_RED_LED_NEW_SOLDER_ MASK_FOR_TABS_PC#6484_NEW_DRILL AND_MASK_FOR_RCA_JACKS MAKE_ALL_LED'S_SAME_LENGTH N N N N N
63V 1U
R161 C63
PCB MECH FUNCTION
100K 10K0 15K PART# NOTCH-ENABLE
R1
680P R13A C15A 2K
J44 R204
100K 680P R20A
GA
100N
WC11 SW1 J46
TLO74
J14 R86 R87
0.5W 330R 0.5W 330R 330R 0.5W 330R 0.5W
J110
1K 63V 10U
REF
P1 P2 P3 P4 P5 P6
JP3
C17A
33K
C40 Q10A R65A
2K
C67 2N2 J50 10N
J30 J15 C66 C41 R15 C68
68N
R91 D10 J29
J33 10K 100N 10K 15P
C1
R22A
J10A
15K R23A R25A
M571_5.00
MODEL(S):- AM50
RIGHT
MPSA13 R18A D26A C27 R11
VOLUME BASS REVERB TREBLE GAIN FREQ
33K
4148
100N
4148
D25
10K 1K
J28
10R 0.5W 10R 0.5W
J16
+ 10K0 RED - LED1 10K0
R19
R2 R35 C13
J18 J19 R34 C14 R49 R6 J20
J13
C26 562R
C25
FUNCTION PART# KNOB
1N 4K99 1N 4K99 PART#
JP4
C9
J27 J26
40V 2200U
562R
R5 J101
M571.PCB_POT_LIST
40V 2200U RTV
J21
J25 J24 33u 16V
BOT
AS_OF
JAN/2000 . . . . .
33078 100N
C58 4418 5C
U2
J47
SEC_GND
00.4_175M LTED LLIRD 00.5_175M EDISREDLOS
TAB8
250TAB
BLACK
100N GAIN 10K
WIP
C44
FUNCTION
SPKR(-)
RTV
25V 100U
TOP
180K 120R
P5
C8
R52
250TAB
TAB5 SEC_IN C51 J23 R100 R53
J75
TAB6 63V 1U 4K7
4417
BOT
BLACK
250TAB
R51 R103 C19
TAB9
250TAB
RED
SPKR(+)
100P 10K 10K 10K REV
5B R101 C151
FUNCTION
D3
J60 330N U7
D1
BAR
DOWN
BAR
DOWN
05MA 00.5-175M
100N
RED
10K
1K5
WIP TOP
TLO72
R66
1N5402
BAR C55 C152
PRODUCTION NOTES
1N5402
BAR
5W 33R
YELLOW
TWEET(+)
TAB10
FUNCTION
250TAB
P3
J48
D4
JB4
R59
DOWN
1N5402
DOWN
250TAB 4K99
R60 SEC_IN
1N5402
D2 GRN
100N 20K0 20K0 4K99 249R
100P R62 C56
TAB7
R61 TRANS PRIM
LEADS FOR D1,D2,D3 AND D4 OVER AND LAY FLAT ON PCB WIRE AT WC3 FOR CE FUSEHOLDERS FOR CE
249R
R63
+ GRN -
REPLACE WITH SAME VALUE FUSE NA 0.8A 250V SB CE T400MA 250V
R64
LED3
RTV
AC HOT 250TAB
.
AC RET 250TAB
.
TRANS PRIM
22N 400V 250TAB
F1
FUSE=0.8A SB
CSA-0.8A/250VS . AC_LINE #3414 CE-T400MA
FUNCTION
250V 4N7 TAB4 TAB2 TAB3 C30
7415 LESON
PART# SWITCH
P:\571CMP.PRN
R70 R105 GRN
GRN GRN
C18A
1 2 3 4 5 6 7 8 9 10 11
1M
J4
GRN 2K
4148
#4417 #4420 #4417 #4420 #4418 #4417
220N C23A
#8641 . . . . .
INPUT2
RTV
1 DO NOT CUT THE BEND THE LEADS 2 DO NOT INSTALL 3 DO NOT INSTALL
LINE-OUT GRN
AM50 M571-5.00
7331 8" 8 OHM JENSEN
R24A
WC1
C32 TAB1 250TAB
WC3 22AWG
FUNCTION
BLK
BLK
YEL
STYLE "P27"
STYLE P28
D0 NOT INSTALL THIS WIRE FOR CE
FOR S VERSION
N.
1206
6 1/2" GRN/YELL
LM38x6 63V 10U 25V 100U 1U 1U
220N SPKR(-) TAB8 BLACK 5W 33R TWEET(+) TAB10 YELLOW
PCB MECH M571_1.00
SPKR(+) TAB9 RED
NEUTRAL
AM50 EXPORT AC WIRING JUL 04, 2000
#8 48 6 L O C K WA S H E R
C HA S SIS
L INE
N.B
GRN REV-SEND RCA_JACK REV-RTN RCA_JACK TAB5J75 25V 330U 2200U 40V SEC_GND TAB7
SEC_IN TAB 6
25V 330U 2200U 40V MC4741 U8 TLO72 U10 63V 2U2
AC HOT RET AC
C32 22N 400V TAB1 PRIM TRANS TAB3 BLK WC1 TAB2 WC3 TAB4
SEC_IN
TRANS PRIM
FU SE=0.8A SB
180N
2N2
MPSA13
10N
TLO74
2N2
63V 1U 330N TLO72 100P U7
TLO7 2 U3
18N
GRN GRN WC10 WC6 100P GRN
100N 470N
TLO72CN 33u 16V
TLO74
NOTCH-ENABLE
MPSA 13
33078
U2
+ GRN LED3
AC_LINE
WHITE DBL/INS
BLACK DBL/INS
SWITCH PART#3702
L ED 2
RIGHT
63V 1U
25V 10N 100U VOLUME 10K 5B 63V 1U 4420 4420 50K B BASS TREBL E
W TO PIP T BO
4417
SW 1
25V 100U
RED
33u 16V
GRN LINE-OUT
P3
+
JP4
100K4419 B
GRN
RIGHT
4418 T BO TO P W IP GAIN 5C 10K
50K B
P5
WC11
+ RED LED1
4417 T B OTO P W IP REV 5B 10K
INPUT2
4N7 250V C30
AM50 M571-2.40
22AWG WC2
TOP AIPB A W BOT TOP B W IP A BOT B
P6
P2
W TO PIP T BO