YORKVILLE AM50 Acoustic Master User manual

U.S.A.
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: [phone]
Fax: [phone]
WORLD HEADQUARTERS
WEB ACCESS: http://www.yorkville.com
CANADA
Yorkville Sound
550 Granite Court
Pickering, Ontario
L1W-3Y8 CANADA
Voice: [phone]
Fax: [phone]
Quality and Innovation Since 1963
Printed in Canada
SERVICE MANUAL
ACOUSTIC MASTERACOUSTIC MASTER

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 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.
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.
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.
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.
Hazard:
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.
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.
IMPORTANT SAFETY INSTRUCTIONS
SAFE_V4.doc Version 4.0 02/11/99 11:54 AM
# Part# Description Function
1 3450 1/4" JCK PCB MT HORZ, GOLD Jack
2 4417 _10K 5B LIN 9MM HORIZONTAL P28 Gain 1
applicable to serial numbers 001xxxx 3 4420 _50K B LIN 9MM HORIZONTAL P28 Bass
4 4420 _50K B LIN 9MM HORIZONTAL P28 Treble
5 4419 100K B LIN 12MM HORIZONTAL STP27 Freq
6 3660 XLR FEML PCB MT HORZ Jack
7 4418 _10K 5C R/A 9MM HORIZONTAL P28 Gain 2
8 4417 _10K 5B LIN 9MM HORIZONTAL P28 Reverb
knob 8641 Note: All pots use 8641 Aqua Knob Knob
9 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL
10 3421 DPDT PUSH SW PCMT MAKE B4 BREAK
10 8649 BUTTON KNOB FLAT BLACK
11 Z282 AM50 Grill (special order while unit is in production only)
12 3834 HEYCO #1214 STRAIN RELIEF
13 8570 CORNER, 2 LEGS NOTCED LIP BLACK
14 8468 VELCRO STRAP 3/4"X22CM (VELSTRAP)
15 3481 8' 3/18 SJT AC LINE CORD 250 CLIPS
16 8459 9.5" STRAP HANDLE, PLASTIC COVERS
17 8547 PLASTIC FOOT BLACK
18 7417 8R 30W TWEETER PIEZO TLC 1
19 7331 8" 8R 50WPGM SPEAKER JENSENJA8/80
1309 BLOC-40B/40K/40W/50B XFMR
2468 0.800 AMP SLO-BLO .25X1.25 FUSE
3586 ACC# 1BB1C1C SHORT REVERB
3745 DUAL XSISTOR PBL SPRING PLATE ZN
3830 TO218 PREGREASED MICA 56-78-2AP
5105 MPSA13 TO92 NPN DARL T&R TA
5887 2200U 50V 20%CAP BLK 18X27MM EL
6755 LM3876T IC 40 WATT POWER AMP
6798 MC4741CP IC QUAD OP AMP
6827 1N5402 200V 3A0 DIODE
6840 MC33078P IC DUAL OP AMP
6882 TL072CP IC FET DUAL OP AMP
6889 TLO74CN IC QUAD O/A T.I ONLY
8581 CUSTOM PBL TRANSISTOR SPACER
Notes:
Internal Electronic Components
Labeled Components
parts-am50.xls - 10/23/00 ftp.yorkville.com/parts Instrument Amplifiers
am50 Oct 20,2000
YS No.
Description
Qty.
YS No.
Description
Qty.
6405
RED 3MM LED 1V7 5MA BRT
2
4770
1/4W 249R 1% T&R RES
2
6408
GRN 3MM LED 1V9 5MA FROSTED
1
4655
1/2W 330R 5% T&R RES
8
6825
1N4148 75V 0A45 DIODE T&R
7
4799
1/4W 562R 1% T&R RES
2
6438
1N4004 400V 1A0 DIODE T&R
1
4981
1/4W 1K 5%MINI T&R RES
3
6827
1N5402 200V 3A0 DIODE
4
4824
1/4W 1K5 5% T&R RES
3
6822
1N4745A 16V0 1W0 ZENER 5% T&R
2
6113
1/4W 2K 5%MINI T&R RES
3
6824
1N5246B 16V0 0W5 ZENER 5% T&R
1
4883
1/4W 2K49 1% T&R RES
1
5105
MPSA13 TO92 NPN DARL T&R TA
2
4827
1/4W 4K7 5% T&R RES
5
6755
LM3876T IC 40 WATT POWER AMP
1
4639
1/4W 4K99 1% T&R RES
4
6798
MC4741CP IC QUAD OP AMP
1
4893
1/4W 5K1 5% T&R RES
1
6840
MC33078P IC DUAL OP AMP
1
4863
1/4W 8K2 5% T&R RES
2
6882
TL072CP IC FET DUAL OP AMP
4
4800
1/4W 10K0 1% T&R RES
12
6889
TLO74CN IC QUAD O/A T.I ONLY
2
4829
1/4W 10K 5% T&R RES
9
5402
_15P 100V 10%CAP T&R BEAD NPO
2
6116
1/4W 10K0 1%MINI MF T&R RES
3
5199
100P 100V 2%CAP T&R RAD CER.2"NPO
2
4830
1/4W 15K 5% T&R RES
2
5410
100P 100V 10%CAP T&R BEAD NPO
3
6123
1/4W 20K0 1%MINI MF T&R RES
2
5420
680P 50V 10%CAP T&R BEAD NPO
2
4840
1/4W 33K 5% T&R RES
2
5422
__1N 50V 10%CAP T&R BEAD NPO
4
4834
1/4W 47K 5% T&R RES
2
5208
__2N2 400V 5%CAP T&R RAD .2"FLM
2
4803
1/4W 49K9 1% T&R RES
1
6451
__4N7 250V 20%CAP BLK 'Y' 10MM AC
1
4836
1/4W 68K 5% T&R RES
1
5204
_10N 100V 10%CAP T&R RAD .2"FLM
2
6120
1/4W 100K 5%MINI T&R RES
5
5207
_18N 100V 5%CAP T&R RAD .2"FLM
2
4849
1/4W 180K 5% T&R RES
2
6435
_22N 275V 20%CAP BLK 'X2' 15MM AC
1
4844
1/4W 1M 5% T&R RES
1
5308
_47N 50V 10%CAP T&R BEAD X7R
1
3586
ACC# 1BB1C1C SHORT REVERB
1
5310
_68N 50V 10%CAP T&R BEAD X7R
1
9892
CABINET COVER, BLUE/BLACK, 54" WIDE
11.5
5228
100N 100V 5%CAP T&R RAD .2"FLM
1
9047
.187 HOLE @ .250 STAG 16GA PERFORAT
1.4
5314
100N 50V 10%CAP T&R BEAD X7R
15
9150
.081" 48X96 UTILITY ALUMINUM
2.13
5230
180N 63V 5%CAP T&R RAD .2"FLM
1
9250
.040" 48X96 5052H32 ALUM VINYL LAMI
0.33
5317
180N 50V 10%CAP T&R BEAD X7R
1
9815
1/2"PRECISION SANDED SPRUCE 4X8
8.16
5231
220N 63V 10%CAP T&R RAD .2"FLM
2
8842
#4 X 5/16 PAN QUAD TYPE A JS500 BLK
2
5233
330N 63V 5%CAP T&R RAD .2"FLM
1
8801
6-32 X 3/8 PAN PH TAPTITE JS500
5
5234
470N 63V 10%CAP T&R RAD .2"FLM
1
8829
6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA
4
5255
__1U 63V 20%CAP T&R RAD .2"EL
3
8828
6-32 X 3/4 PAN PH TAPTITE JS500
3
5256
__1U 63V 5%CAP T&R RAD .2"FLM
2
8876
#6 X 1 1/2 PAN PH TYPE A JS500 BLK
4
5257
__2U2 63V 20%CAP T&R RAD .2"EL
1
8763
8-32 X 1/2 PAN PH MS JS500 BLACK
2
5945
_10U 63V 20%CAP T&R RAD .2"EL
1
8767
#8 X 3/4 PAN PHIL TYPE A JS500 BLK
4
5961
_33U 16V 20%CAP T&R RAD .2"NP
2
8815
8-32 X 3/4 PAN PH TAPTITE JS500
1
5267
100U 25V 20%CAP T&R RAD .2"EL
3
8753
#10 X 1/2 PAN PH TYPE A JS500 BLACK
12
5630
330U 25V 20%CAP BLK 10X13MM EL
2
8756
#10 X 3/4 PAN PH TYPE A BLACK OXIDE
8
5887
2200U 50V 20%CAP BLK 18X27MM EL
2
8781
#10 X 7/8 FLAT PHIL TYPE A JS500BLK
10
4417
_10K 5B LIN 9MM HORIZONTAL P28
2
8912
10-32 X 1 FLAT PHIL MS JS500 BLK
4
4418
_10K 5C R/A 9MM HORIZONTAL P28
1
8770
1/4-20 X 1 5/16 TRUSS PH MS JS500
2
4420
_50K B LIN 9MM HORIZONTAL P28
2
8905
YORKVILLE PRODUCT SCHEMATIC
1
4419
100K B LIN 12MM HORIZONTAL STP27
1
3833
8 X 3/8 (250 OD,.171 ID)NY SPACER
3
8547
PLASTIC FOOT BLACK
8
7331
8" 8R 50WPGM SPEAKER JENSENJA8/80
1
8570
CORNER, 2 LEGS NOTCED LIP BLACK
6
8820
#8 FLAT WASHER JS500
2
3463
CLIP 110X020 18-22AWG DISCO/INSL
2
8473
#10 BLACK CUPWASHER SWF-10BK
2
3467
CLIP 205X032 14-16AWG DISC/INSUL
2
3421
DPDT PUSH SW PCMT MAKE B4 BREAK
1
3489
CLIP 250X032 18-22AWG DISCO/INSL
4
3698
SPST ROKR SW QUIK 180" AC PWR BL/BL
1
3682
250 MALE PCB TAB BULK CARTRIGE
10
3937
YELLOW 18 AWG TR-64 PREFUSED
2.333
3498
1/4" JCK PCB MT HORZ
3
3940
RED 18 AWG TR-64 PREFUSED
2.333
3886
36" RCA PREFAB CABLE RED
1
3941
BLACK 18 AWG TR-64 PREFUSED
4.667
3890
36" PREFAB. CABLE
1
3950
GREEN 18 AWG TR-64 PREFUSED
2
3914
RCA SNGL PCB MT HORZ
2
3958
BLACK 18AWG 36STND WIRE DOUBLE INS
3.333
3417
6-32 SCREW TERMINAL PC MOUNT
2
1309
BLOC-40B/40K/40W/50B XFMR
1
3660
XLR FEML PCB MT HORZ
1
3451
EYELET SMALL 0.089 OD PLATED
10
3414
INTERNATIONAL PC MOUNT FUSEHOLDER
2
2468
0.800 AMP SLO-BLO .25X1.25 FUSE
1
8459
9.5" STRAP HANDLE, PLASTIC COVERS
1
8604
10-32 T NUT
2
7417
8R 30W TWEETER PIEZO TLC 1
1
3745
DUAL XSISTOR PBL SPRING PLATE ZN
1
3804
SNAP ON 1.5" INSULATING BUSHING
1
3795
#8 GROUND LUG ZIERICK 505-169
2
3801
5/8" BUMPER BUTTON BLACK
1
3803
NYLON SECUR-A-TACH MINI PLASTIC TIE
1
3810
4" NYLON CABLE TIE
5
8641
AQUA KNOB FOR "NEW" ACOUSTIC SERIE
6
8649
BUTTON KNOB FLAT BLACK
1
3481
8' 3/18 SJT AC LINE CORD 250 CLIPS
1
3834
HEYCO #1214 STRAIN RELIEF
1
"Y" LOGO ACOUSTIC SERIES SML. DOMED
1
8800
6-32 KEPS NUT ZINC
3
8787
8-32 KEPS NUT ZINC
2
8845
10-32 PEMNUT SS-032-2-Z1
2
8898
1/4-20 CAGE NUT C7998142027
2
3830
TO218 PREGREASED MICA 56-78-2AP
1
8581
CUSTOM PBL TRANSISTOR SPACER
1
4597
22AWG STRAN TC WIR JMP
7
4599
22AWG SOLID SC WIR T&R JMP
41
5299
24AWG SOLID SC WIR RAD JMP
2
4675
1/2W 10R 5% T&R RES
2
4816
1/4W 33R 5% T&R RES
1
4704
5.0W 33R 5% BLK RES
1
4897
1/4W 120R 5% T&R RES
2
4857
1/4W 220R 5% T&R RES
4

Block Diagram for AM50
AMP
Input 1 Gain Pot
Reverb
Pot
EQ
In 1
BLOCK-DIAGRAM-AM50-1V4 .ai
Channel Inputs
Low / High
DESIGNED AND MANUFACTURED BY YORKVILLE SOUND
Channel 1
Unbalanced
Stereo 1/4"
C:\ADATA\block diagrams\BLOCK-DIAGRAM-AM50-1V4.ai
18-JUL-2003
SE
XLR
Balanced
Stereo 1/4"
Input 2 Gain Pot
In 2
Channel 2
Balanced
Reverb Gain Stage
Notch Filter Notch
OUT
IN
Contour Filter
Channel 1
Clip LED Channel 2
Clip LED
Buffer
RCA
Reverb
Send
RCA
Reverb
Return
Reverb Gain Stage
Tweeter
8 Ohms
8 Ohms
Speaker Outputs
+
+

D26
1/2
TL072
U3
2
3
1
1/2
TL072
U1
2
3
1
1/2
33078
U2
2
3
1
2/2
33078
U2
6
5
7
1u
16V
C19
SRT
MONO
NO_GOLD
JB2 1
2
3
4
5
6
RCA
REV_RTN
J10
1
2
SRT
MONO
NO_GOLD
JP3 1
2
3
4
5
6
100N
C41
1/4
MC4741
U8
2
3
1
2/4
MC4741
U8
6
5
7
4/4
MC4741
U8
13
12
14
3/4
MC4741
U8
9
10
8
2/2
TL072
U10
6
5
7
1/2
TL072
U7
2
3
1
10K
R101
100U
16V
C7
100N
C40
180N
C15
2U2 16V
C18
NUTRIX
MIC_IN
JP4
1
3
2
#7415
3.75"
4R
4/4
TL074
U6
13
12
14
8K2
R27
3/4
TL074
U6
9
10
8
CW
D
B
100K
NOTCH
P6
8K2
R26
10K
R100
4n7
250V
180K
R18A
10K
R2
0.5W
330R
R39
AS_OFKNOBPART#FUNCTIONREF
10
9
8
7
6
5
4
3
2
1
#
MODEL(S):-
D
D
D
D
.
.
.
.
.
JAN/2000
K
K
K
K
.
.
.
.
.
#8641
N
N
N
N
#4419
#4418
#4420
#4417
#4420
#4417
F
F
F
F
NOTCH
GAIN
TREBLE
REVERB
BASS
VOLUME
D
D
D
D
P6
P5
P4
P3
P2
P1
AM50
M571.PCB_POT_LIST
1K
R35
2N2.
C67
10K
R15
47K
R47
1K
R48
4K7
R46
4K7
R45
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
OCT/06/03
MAR/22/01
MAY/03/00
JAN/18/00
V
V
V
V
V
V
1.50
1.40
1.30
1.20
N
N
N
N
N
N
CORRECT_POLARITY_OF_HORN
PC#6358_E_VERSION_XFMR_#1206->1309E
UPDATE_CE_PWR-SUPPLY
ADD_HISTORY/POT_BLOCKS
AM50
M571.SCH_DATABASE_HISTORY
0.5W
330R
R203
470N
C62 100N
C63
4K99
R49
10K0
R11
562R
R6
4K99
R34
562R
R5
2K
R1
10K0
R19
15K
R83
47K
R33
180K
R52
"P28"
STYLE
1K5
R16
68K
R17
MPSA43
EBC
MPSA56
220R
R29
220R
R30
220R
R32
10K
R103
2/4
TL072
U3
6
5
7
10K
R105
33R
R90
100P
C3
1K
R70
0.5W
330R
R205
100N
C27
D31
A13
Q10
RED
LED2
33K
R31
100K
R65
100N
C27A
D25
49K9
R7
10K0
R4
100N
C151
2U2
63V
C121
1M
R3
1U
63V
C100
220R
R28
10K
R84
10K0
R14
10K0
R82
10K
R85
2N2C64
100K
R161
NC
V_IN+ V_IN- MUTE
GND
NC
NC(+)
V-
OUTPUT
NC
V+
11 10
9 8 7 6 5 4 3 2 1
LM3876T
10K
R18
10K0
R89
120R
R53
1/4
TL074
U6
2
3
1
4K7
R25
4K7
R51
0.5W
330R
R207
D6
2K49
R41 10K0
R42
4K75
R50
10K0
R80
10K0
R12
18N
C60
SW1
IN
OUT
NOTCH
100N
C152
3/4
TL074
U5
9
10
8
2/4
TL074
U5
6
5
7
1/4
TL074
U5
2
3
1
CW
D
B
100K
NOTCH
P6
10K0
R44
10K0
R81
#7322
8"
8R
40V
220N
C23A 33R
5W
R24A
1K
R20A
15K
R22A
18N
C61
10U
63V
C17A
10K
R21A
D10A
CW
TREBLE
50K
BP4
CW
BASS
50K
BP2
CW
VOLUME2
10K
5C P5
100U
25V
C18A
16V
1N5246B
ZD4A
100K
R55
RCA
REV_SEND
J11
1
2
D60
"P27"
STYLE
10R
0.5W
R25A
10N
C2
100N
C58
100K
R40
A13
Q10A
50V
1U
C22A
LM3876
U4
9
10
37
1
5
48
100N
C44
680P
C16A
2K
R86
5K
R43
47N
C21
RED
LED1
100N
C50
100N
C42
100N
C57
DSG
2N5638
100N
C45
100N
C150
100N
C43
15P
C1
100P
C4
CW
VOLUME
10K
5B P1
15P
C12
1N
C11
100N
C10
1N
C22
1N
C14
1N
C13
10K0
R8
100P
C16
1/2
TL072
U10
2
3
1
100P
C51
33U 16V
C9
33K
R65A
10R
0.5W
R23A
68N
C68
680P
C15A
1N4004
D5A
10K
R91
2K
R87
100K
R13A
50V
1U
C21A
330U
25V
C28
D26A
0.8A-SB
F1
330R
0.5W
R201
1N5402
D4
DATE:
TITLE:
SCH ISSUE:MODELS:
PCB#&VER:NAME:YORKVILLE
SHEET OF 1.50
AM50_ACOUSTIC_AMP
OCT/06/2003
M571.SCH
AM50
M571
11
100U
16V
C8
249R
R63
1N5402
D3
RED
LED3 1K5
R66
2200U
40V
C25
22n
400V
C90
2200U
40V
C26
120Vac
60Hz
#1309
T1
16V
1N4745A
ZD3
10K0
R10
CW
REVERB
5B
10K
P3
4n7
250V
C91
16V
1N4745A
ZD2
1N5402
D2
1N5402
D1
330R
0.5W
R202
180N
C23
0.5W
330R
R204
330U
25V
C27
249R
R64
100P
C56
330N
C55
10N
C66
33U
16V
C6
4K99
R61
4K99
R62
20K0
R59
20K0
R60
SRT
LINE-OUT
NO_GOLD
JB4
1
2
3
4
5
6
2/2
TL072
U7
6
5
7
BC550C
CBE
BC560C
T400mA
22n
400V
230Vac
50Hz
#1309E
0.5W
330R
R206
120R
R9
220N.
C65
2/2
TL072
U1
6
5
7
4/4
TL074
U5
13
12
14
LG
LG
LG
IG
IG
IG
+35VDC
+35VDC
-35VDC
-35VDC
BOG
BOG
BOG
BOG
BOG
BOG BOG
SG SG
SG
SG
SG
SG
SG
SG
SG
SG
SGSG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG SG
SG
SG
SG
SG
SG
SG
-16V
-16V
AG
AG
AG
AG
AG
+16V
+16V
+16V
+16V
YEL
RED RED
BLK
100MVRMS
100mvrms
PIN 1
CLIP
CLIP
POLY
POLY
POLY
F1
SW1
C32
T1
EXPORT
GRN/YEL
BROWN
BLUE
WHITE GREEN BLACK
PIN OUTS
LINE OUT
REVERB TANK #3586
VOLUMES AT 10, TONES AT 0
AC VOLTAGES MEASURED AT 1KHz AND WITH
ALL UNMARKED DIODES ARE 1N4148
NOTES:
3mVrms
1Vrms
CHANNEL 2
INPUT
INPUT
CHANNEL 1
BLK

VCD
-38VDC
AG
+38VDC
M571-5.00
SOLDERSIDE M571_5.00
AM50
DRILL DETL M571_4.00
C28
25V
330U
C27
25V
330U
D25
4148
R65A
33K
R18A
33K
C68
68N
C10
100N
R70
1K5
C121
63V
1U
C4
100P
C15A 680P
J4
R50
4K7
R5
562R
R6
562R
C14
1N
R34
4K99
R49
4K99
C13
1N
R47
47K
J13
R22A 15K
R46
4K7
R45
4K7
ZD2
16V/1W
R51
4K7
U2
33078
C44
100N
R4
10K0
R52
180K
R7
49K9
R53
120R
C9
33u 16V
R13A 100K
R9
120R
C8
25V
100U
R10
10K0
R21A
10K
C100
63V
1U
R20A 1K
TAB9
250TAB
FUNCTION
TAB2
250TAB
.
TAB4
250TAB
.
TAB1
250TAB
FUNCTION
TAB3
250TAB
FUNCTION
TAB10
250TAB
FUNCTION
TAB8
250TAB
FUNCTION
TAB7
250TAB
SEC_IN
TAB6
250TAB
SEC_IN
TAB5
250TAB SEC_GND
R203
0.5W 330R
R39
0.5W 330R
J12
R24A
5W
33R
DOWN
BAR
D1
1N5402
DOWN
BAR
D2
1N5402
DOWN
BAR
D3
1N5402
DOWN
BAR
D4 1N5402
J18
ZD4A
16V
R206
0.5W 330R
R66
1K5
R207
0.5W 330R
R205
0.5W 330R
R29
220R
C55330N
C56100P
R64
249R
R63
249R
R82
10K0
R81
10K0
R44
10K0
R62
4K99
JB10
PART#3914
.
RCA_JACK
R61
4K99
U5TLO74
R12
10K0
C152
100N
RTV
F1
.
#3414AC_LINE
R60
20K0
U1
TLO72CN
U3
TLO72
R55
100K
R17
68K
R16
1K5
R33
47K
R26
8K2
R27
8K2
U10
TLO72
U8
MC4741
R59
20K0
P28
STYLE
C43
100N
J11
J26
U4
FUNCTION
#6755
LM38x6
STYLE
"P27"
J34
J30
R90
33R
J33
R87
2K
R201
0.5W 330R
C16A
680P
J28 J29
WC3
22AWG
-
+
LED1
RED
C2
10N
WC11
GRN
R202
0.5W 330R
C45
100N
C50
100N
R32
220R
C23
180N
R14
10K0
Q10
MPSA13
D26
4148
J32
KNOBPART#FUNCTIONREF
MODEL(S):-
AS_OF
FREQ
GAIN
TREBLE
REVERB
BASS
VOLUME
#4417
#4418
#4420
#4417
#4420
#4417
.
.
.
.
.
JAN/2000
.
.
.
.
.
#8641
P6
P5
P4
P3
P2
P1
AM50
M571.PCB_POT_LIST
-
+
LED3
GRN
11
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
AUG/26/02
.
.
.
JAN/15/02
JAN/18/00
V
V
V
V
V
5.00
.
.
.
4.00
3.00
N
N
N
N
N
MAKE_ALL_LED’S_SAME_LENGTH
AND_MASK_FOR_RCA_JACKS
MASK_FOR_TABS_PC#6484_NEW_DRILL
PC#6177_MOVE_RED_LED_NEW_SOLDER_
PC#6250_MOVE_C2_AWAY_FROM_JB2
ADD_POT_CHART
AM50
M571.PCB_DATABASE_HISTORY
C22A
1U
C30
4N7
250V
C32 22N
400V
R86
2K
D10
4148
R85
10K0
J39
D5A
1N4004
J31
R84
10K0
C18A
25V
100U
J45
TOP
WIP
BOT
P1
10K
5B
4417
VOLUME
J25 J27 J24
J37 J36 J35
D60
4148
D6
4148
J16
R89
10K0
C23A220N
J75
C25
2200U
40V
C26
2200U
40V
R23A
0.5W
10R
C21A
1U
C17A
63V
10U
R25A
0.5W
10R
C7
25V
100U
C57
100N
R83
15K
C62 470N
C6
33u
16V
C67 2N2
C6610N
C65
220N
C64 2N2
TOPA
TOPB
WIPB
BOTB
BOTA
WIPA
P6
B
100K 4419
PART#
C63 100N
WC6
GRN
C27
100N
R11
10K0
R65
100K
J38
JB11
PART#3914
.
RCA_JACK
C15 180N
RTV
RTV
RTV
PART#
SWITCH
J42
WC1
BLK
C11
1N
R48
1K
C12
15P
-
+
LED2
RED
R8
10K0
TOP
WIP
BOT
P2
50K
B
4420
BASS
TOP
WIP
BOT
50K
B
4420
TREBLE
TOP
WIP
BOT
P3
10K
5B
4417
REV
U6
TLO74
TOP
WIP
BOT
P5
10K
5C
4418
GAIN
180K
JB4
LINE-OUT
JP3
RIGHT
JB2
RIGHT
JP4
INPUT2
PART#
SW1
NOTCH-ENABLE
PART#
R1
2K
R30
220R
C18
63V
2U2
R105
10K
C16
100P
C22
1N
C21
47N
C42
100N
D31
4148
R25
4K7
R18
10K
R28
220R
R80
10K0
J41
R40
100K
R43
5K1
R42
10K0
R41
2K49
C61 18N
C60
18N
C27
100N
D26A
4148
Q10A
MPSA13
J6
J2
R2
10K
R15
10K
J5
R1910K0
C1
15P
R35
1K
CSA-0.8A/250VS
CE-T400MA
C40
100N
C41
100N
C58
100N
C151
100N
C150
100N
J8
J10A
R3
1M
J3
U7
TLO72
R101
10K
R100
10K
R103
10K
C51
100P
WC10
GRN
C19
63V
1U
R91
10K
J21
J48
J7
J14
J50
J15
J40
J19
J9
J44
J20
J43
J47
J23
J46
GRN
J60
R204
0.5W 330R
J110
ZD3
16V/1W
R161
100K
J101
C3
100P
-16V
-38VDC
SG
+16V
+16V
TO REVB OUTPUT
TO REVB INPUT
N.
M571-5.00
CE T400MA 250V NA 0.8A 250V SB
VALUE FUSE REPLACE WITH SAME
FUSE=0.8A SB
YELLOW
AM50
TWEET(+)
AC HOT AC RET
GRN
GRN
PRIM
TRANS
REDBLACK
SPKR(+)
SPKR(-)
PRIM
TRANS
3 DO NOT INSTALL FUSEHOLDERS FOR CE
2 DO NOT INSTALL WIRE AT WC3 FOR CE
FOR CE
THIS WIRE
D0 NOT INSTALL
BEND THE LEADS OVER AND LAY FLAT ON PCB
1 DO NOT CUT THE LEADS FOR D1,D2,D3 AND D4
PRODUCTION NOTES
BLK
RED
INPUT
OUTPUT
FOR S VERSION
BLK
YEL
7331 8" 8 OHM JENSEN 7415 LESON
RED
BLACK
PCB MECH M571_5.00
P:\571CMP.PRN

25V
330U
25V
330U
63V
1U
U2
33078
33u
16V
25V
100U
63V
1U
TAB9
TAB2
TAB4
TAB1
TAB3
TAB10TAB8
TAB7
SEC_IN
TAB6
SEC_IN
TAB5
SEC_GND
5W
33R
330N
100P
TLO74
AC_LINE
TLO72CN
U3
TLO72
U10
TLO72
U8
MC4741 WC3
-
+
LED1
RED
10N
WC11
GRN
MPSA13
-
+
LED3
GRN
1U
C30
4N7
250V
C32 22N
400V
LM38x6
25V
100U
10K
5B
4417
VOLUME
220N
J75
2200U
40V
2200U
40V
1U
63V
10U
25V
100U
470N
33u
16V
2N2 10N
2N2
TOPA
TOPB
WIPB
BOTB
BOTA
WIPA
P6
B
100K4419
100N
WC2
22AWG
WC6
GRN
RCA_JACK
REV-RTN
180N
PART#3702
SWITCH
WC1 BLK
-
+LED2
RED
TOP
WIP
BOT
P2
50K
B
4420
BASS
TOP
WIP
BOT
50K
B
4420
TREBLE
TOP
WIP
BOT
P3
10K
5B
4417
REV
TLO74
TOP
WIP
BOT
P5
10K
5C
4418
GAIN
LINE-OUT
RIGHT
RIGHT
JP4
INPUT2
SW1
NOTCH-ENABLE
63V
2U2
RCA_JACK
REV-SEND
18N
MPSA13
U7
TLO72
WC10
GRN
63V
1U
GRN
100P
N.B
M571-2.40
FUSE=0.8A SB
YELLOW
AM50
TWEET(+)
AC HOTAC RET
GRN
GRN
PRIM
TRANS
REDBLACK
SPKR(+)
SPKR(-)
PRIM
TRANS
PCB MECH M571_1.00
#8486
LOCKWASHER
CHASSIS
AM50
EXPORT AC
WIRING
JUL 04, 2000
1206
LINE
NEUTRAL
BLACK DBL/INS
WHITE DBL/INS
6 1/2" GRN/YELL