YORKVILLE YCV20 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
YCV20 - Series 2
Traynor Custom Valve 20
TYPE: YS1006

IMPORTANT SAFETY INSTRUCTIONS
safety-4v3.eps • Oct. 26/05
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.
INSTRUCTIONS PERTAINING TO A
RISK OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS
Read Instructions
The Owner’s Manualshould be read and understood
before operation of your unit. Please, save these instruc-
tions 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 OPERATETHE UNIT.
Service
The unit should be serviced only by qualified service personnel.
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
INSTRUCTIONS RELATIVES AU RISQUE
DE FEU, CHOC ÉLECTRIQUE, OU
BLESSURES AUX PERSONNES
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, 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.
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.

# Part# Description
Labeled Components
1 8260 TRAYNOR LOGO
2 7079 12" 8R 50WPGM SPEAKER CELESTIO
Series 2 (incl. WR version) 3 8461 TRIM CLIP (PLATED BLK ZINC)
4Z354 YCV20 GRILLE* (‡ cuurent model only)
5 8456 10.0" STRAP HANDLE, NICKEL COVERS
6TFS-2B TRAYNOR DUAL FOOTSWCH 10' CORD
73428 AC LINE CORD - #3474(EURO)
83537 ACC# 4EB3C1B LONG REVERB
9 3890 36" PREFAB. CABLE (RED/BLACK)
10 8770 1/4-20 X 1 5/16 TRUSS PH MS JS5
11 8504 CORNER, 2 LEGS NOTCED LIP NICKEL PLATED
12 8521 RUBBER BUMPER WITH WASHER VERYS
13 6397 JEWELED PILOT LAMP AMBER REG
14 8430 CHICKEN-BEAK KNOB
15 8633 ROUND PUSH BUTTON 1/4" BLACK
16 3921 1/4" JCK PCB MT VERT STER RT SWT
17 3438 230 AC RECEPTACLE FUSE & 250 T
18 3698 SPST ROKR SW QUIK 180" AC PWR B
19 3450 & 3450NUT 1/4" ALL GOLD PC MNT JK SKT
20 3436/8661 DPDT PUSH SW B4 MAKE/BUTTON KNOB GREY
21 3923 XLR MALE PCB MT HORZ MTHOLE-V SNAP
22 7025A OR 7025B 12AX7 DUAL TRIODE PREAMP TUBE
23 6BQ5 6BQ5 PENTODE OUTPUT TUBE
24 7078 (WINE) 12" 8R 25WPGM SPEAKER CELESTION
25 3552 NYLON SPRING CLAMP
*NOTE: Replacement grilles are 'Special-Order' and are only available while the model is in production.
‡ Grilles & support replacements are for CURRENT models only
TUBES
4
3
1
2
13
12
22/23
17
5
16
10
7
68/9
11
14 15
18 19
Wine Red Version Speaker
24
20 21
Parts-Serv-YCV20-Series2-1v0.xls ftp.yorkville.com Speaker Enclosure

DISCONNECT POWER WHEN
REPLACING TUBES
DÉBRANCHÉ L’APPAREIL AVANT
DE REMPLACER LES LAMPES
POWER
6BQ5
V4
POWER
6BQ5
V5
PREAMP
12AX7
V1
12AX7
V2 SPLITTER
12AX7
V3
Block Diagram for YCV20 II
DE S IG N ED A ND MA NUF ACT URE D BY Y O RK V IL LE SO UND
+
-
+
-
Mono
1/4-inch
Input
Footswitch
Channel Select
Boost
D.I. Out
Preamp
Ch 2
Gain
Ch 1
Gain
Ch 2
Volume
Bright
Boost
Channel
Select
Channel
Select
V1:A Preamp V2:B
Preamp
V2:A
Preamp
V1:B
0 dB
Splitter
Send Rtn
Reverb
Accutronics ©
4EBC1B V3:A
V4:A
V5:A
Power
Amp
External
Speaker Out
Headphones
YS#7079
8-ohms
12-inch
Speaker
Internal
Spkr Defeat
100R
5W
Blk
Grn
Treble/Bass/Mid
EQ
Ch 1
Volume
Pre-Amp
Out
Amp In
BLOCK-DIAG-ycv20-Series-II-1v30.ai
TYPE: YS1006
+

YCV20 - Series 2
YS No. Description Qty. YS No. Description Qty.
6397 JEWELED PILOT LAMP AMBER REG V1 1 4612 1/2W 18R 5% T&R RES 3
5906 RED 3MM LED 1V9 20MA .4SPCER T&
R
1 4817 1/4W 47R 5% T&R RES 4
6398 RED 5MM LED 1V5 20MA HIGH EFF 1 4912 1/4W 75R 5% T&R RES 1
6399 YEL 5MM LED 1V5 20MA HIGH EFF 1 2044 1/4W 101R0 FUSIBLE T&R RES 2
5907 YEL 3MM LED 1V9 20MA .4SPCER T&
R
1 4692 5.0W 100R 5% BLK RES 2
5908 GRN 3MM LED 1V9 20MA .4SPCER T&
R
1 4852 1/4W 100R 5% T&R RES 2
6825 1N4148 75V 0A45 DIODE T&R 6 2022 1.0W 220R 5%FLAME PROOF T&R RES 3
6438 1N4007 400V 1A0 DIODE T&R 9 4857 1/4W 220R 5% T&R RES 1
6461 1N5240BRL 10V0 0W5 ZENER 5% T&R 1 4713 1.0W 470R 5% T&R RES 1
6475 1N5262B 51V0 0W5 ZENER 5% T&R 3 4821 1/4W 470R 5% T&R RES 3
6871 MC7915CT TO220 N 15V0 REG V2 1 4980 1/4W 470R 5%MINI T&R RES 1
6872 MC7815CT TO220 P 15V0 REG V1 1 4799 1/4W 562R 1% T&R RES 2
5102 BC560C TO92 PNP TRANSISTOR T&R TB 2 4891 1/4W 620R 5% T&R RES 2
5103 MPSA06 TO92 NPN TRANSISTOR T&R T
A
3 4673 1/2W 680R 5% T&R RES 2
5104 MPSA56 TO92 PNP TRAN T&R TA 1 4822 1/4W 820R 5% T&R RES 2
6730 IRF830 TO220 NCH MFET TN 1 4623 1/2W 1K 5% T&R RES 2
6882 TL072CP IC FET DUAL OP AMP 2 4913 1.0W 1K 5% T&R RES 1
5199 100P 100V 2%CAP T&R RAD CER.2"NPO 1 4791 1/4W 1K54 1% T&T RES 4
5197 220P 100V 2%CAP T&R RAD CER.2"NPO 3 4647 1/2W 2K2 5% T&R RES 1
5201 470P 100V 5%CAP T&R RAD CER.2"NPO 3 4847 1/4W 2K2 5% T&R RES 1
5206 __1N 400V 5%CAP T&R RAD .2"FLM 2 2035 1/4W 2K21 1%FLAME PROOF T&R RES 1
5208 __2N2 400V 5%CAP T&R RAD .2"FLM 4 4827 1/4W 4K7 5% T&R RES 2
5275 __3N3 100V 5%CAP T&R RAD .2"FLM 1 4982 1/4W 4K7 5%MINI T&R RES 1
5209 __4N7 250V 5%CAP T&R RAD .2"FLM 2 4828 1/4W 6K8 5% T&R RES 1
6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1 4800 1/4W 10K0 1% T&R RES 2
5272 __6N8 100V 5%CAP T&R RAD .2"FLM 1 4829 1/4W 10K 5% T&R RES 13
5204 _10N 100V 10%CAP T&R RAD .2"FLM 1 5031 1.0W 10K0 5% T&R 2
5834 _10N 250V 20%CAP BLK RAD POLY FLM 1 4831 1/4W 18K 5% T&R RES 1
5210 _22N 100V 10%CAP T&R RAD .2"FLM 1 4840 1/4W 33K 5% T&R RES 1
5840 _22N 400V 10%CAP BLK RAD POLY FLM 2 4834 1/4W 47K 5% T&R RES 3
6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1 4848 1/4W 62K 5% T&R RES 1
5306 _33N 50V 10%CAP T&R BEAD X7R 1 4837 1/4W 82K 5% T&R RES 1
5224 _47N 100V 10%CAP T&R RAD .2"FLM 2 4838 1/4W 100K 5% T&R RES 7
5226 _68N 100V 5%CAP T&R RAD .2"FLM 1 4776 1/4W 113K 1% T&R RES 4
5212 100N 63V 5%CAP T&R RAD .2"FLM 10 4841 1/4W 220K 5% T&R RES 7
5314 100N 50V 10%CAP T&R BEAD X7R 3 4843 1/4W 470K 5% T&R RES 5
5865 100N 250V 10%CAP BLK RAD POLY FLM 1 4880 1/4W 680K 5% T&R RES 1
5882 220N 250V 10%CAP BLK RAD POLY FLM 1 4844 1/4W 1M 5% T&R RES 7
5233 330N 63V 5%CAP T&R RAD .2"FLM 2 3610 10" 9C-26AWG RIB 3/4" NOTCH 0.1" 2
5629 _10U 160V 20%CAP BLK 10X13MM EL 1 3696 RELAY 1C 02AMP DC24 006MA PC-S 2
5631 _22U 50V 20%CAP T&R 6X7MM .2"EL 9 3700 RELAY 2C 01AMP DC24 015MA PC-S 1
5958 _22U 350V 20%CAP BLK 13X25 EL 6 3537
A
CC# 4EB3C1B LONG REVERB 1
5618 470U 25V 20%CAP BLK 10X15MM EL 4 8865 4-40 X 5/16 PAN PH MS JS500 14
TFS-2B TRAYNOR DUAL FOOTSWCH 10' CORD-BULK 1 8832 6-32 X 1/4 PAN PH TAPTITE JS500 9
4423 _20K 15AAUDIO 9MM P32 1 8801 6-32 X 3/8 PAN PH TAPTITE JS500 2
4424 100K 1B LIN 9MM P32 2 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 11
4425 500K 15AAUDIO 9MM P32 5 8837 6-32 X 1/2 ROUND PH MS JS500 3
713 25 X 20 X 50 2 MIL PLASTIC BAG 1 8757 #6 X 5/8 PAN PHIL TYPE A ZINC CLEA
R
2
3976 SNAP ON 0.843" INSULATING BUSHING 2 8824 8-32 X 5/16 PAN QUAD TAPTITE JS500 2
8461 TRIM CLIP (PLATED BLK ZINC) 4 8722 #8 X 1" PAN QUAD TYPE AB B/O 4
8521 RUBBER BUMPER WITH WASHER VERYSMALL 4 8809 10-32 X 1/4 PAN PH TAPTITE JS500 25
3478 CLIP 205/187X032 18-22AWG DISCO/INS 5 8750 #10 X 1/2 PAN PH TYPE A ZINC 16
3489 CLIP 250X032 18-22AWG DISCO/INSL 2 8756 #10 X 3/4 PAN PH TYPE A BLACK OXIDE 10
3494 CLIP 205/187X020 14-16AWG DISCO/INS 2 8843 10-32 X 1 1/8 FLAT PH MS JS500 2
3601 RING TERMINAL 16AWG WIRE & #8 SCREW 2 8786 10-32 X 1 1/4 PAN QD MS JS500 BLACK 4
3682 250 MALE PCB TAB REE
L
16 8862 #10 X 1 1/2 PAN PH TYPE A JS500 4
3498 1/4" JCK PCB MT HORZ 2 8770 1/4-20 X 1 5/16 TRUSS PH MS JS500 4
3528 1/4" JCK PCB MT HORZ GOLD TR_ 3 8905 YORKVILLE PRODUCT SCHEMATI
C
1
3921 1/4" JCK PCB MT VERT STER RT SWT 1 3741 .5 SPACER ID-.171 OD-.25 #912-500 4
3890 36"90'RCA DUAL RED-WHITE PREFAB CBL 1 3865 1/2 PLASTIC HEX SPACER #6 9
3914 RCA SNGL PCB MT HORZ 2 3858 3/4 PLASTIC HEX SPACER #4 7
3923 XLR MALE PCB MT HORZ MTHOLE-V SNA
P
1 7079 12" 8R 50WPGM SPEAKER CELESTION 1
3451 EYELET SMALL 0.089 OD PLATED 13 8482 3/8 1D FLAT WASHER 1
2471 T1A 5X20MM FUSE 1 8488 3/8 INT TOOTH LOCKWASHE ZINC 1
8456 10.0" STRAP HANDLE, NICKEL COVERS 1 8491 #10 SPLIT LOCK WASHER BO 6
8604 10-32 T NUT 6 8820 #8 FLAT WASHER JS500 4
8889 RUBBER GROMMET #2183-034-BLK 7 8817 #10 FLAT WASHER FOR 3/16" BOLT 8
3438 IEC PWR SOC W/.205TAB &FUSE 10A250V 1 3436 DPDT PUSH SW PCMT H BREAK B4 MAKE 1
3552 NYLON SPRING CLAMP 2 3522 DPDT MINI PC VERT SNP AL
T
4
3810 4" NYLON CABLE TIE 6 3698 SPST ROKR SW QUIK 180" AC PWR BL/BL 1
8430 YCV40 CHICKEN-BEAK KNO
B
8 3732 9 PIN PC MOUNT TUBE SOCKET BE 2
8504 CORNER, 2 LEGS NOTCED LIP NICKEL 8 3983 9 PIN PC MOUNT TUBE SOCKE
T
3
8633 ROUND PUSH BUTTON 1/4" BLACK 4 12AX7 DUAL TRIODE PREAMP TUBE 3
8661 BUTTON KNOB FLAT GREY 1 6BQ5 PENTODE OUTPUT TUBE 2
3428 8' 3/18 SJT AC LINE CORD REMOVABLE 1 1330 YCV20 POWER 120VAC 60HZ XFMR 1
8260 YCV40 LOGO EMBOSSED ALUMINUM 1 1330M YCV20 OUTPUT XFMR 1
8910 YORKVILLE PRODUCT MANUA
L
1
8900 YORKVILLE WARRANTY CARD 2-YR UNLTD. 1
3674 9 CIR CABLE HOLDER .098 4
8800 6-32 KEPS NUT ZINC 5
8890 1/4-20 CAGE NUT C79-88142027 4
3796 ELASTOMER PAD TSIL 1.0X0.8 3
3850 TO-220 PLASTIC TRANSISTOR INSULATOR 3
4597 22AWG STRAN TC WIR JMP 2
4599 22AWG SOLID SC WIR T&R JMP 55
2037 1/4W 10R FUSIBLE T&R RES 2
4896 1/4W 15R 5% T&R RES 1

11 11
10 10
9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
M
M
N
N
O
O
P
P
Q
Q
of
Filename:
PCB# Sheet 31
Product
Date: 7V00
M647-7V00sch.sch2002
M647
Sheet1
Mon Sep 11, 2006 Rev:
YCV20
of
Filename:
PCB# Sheet 31
Product
Date: 7V00
M647-7V00sch.sch2002
M647
Sheet1
Mon Sep 11, 2006 Rev:
YCV20
+150V
GND
GND
GND
PL1
-15V
-15V
+15V
+150V
R8
1/4W
33K
X46
.
W16
SPKR+
BLU
SCRN
.
W20
SPKR-
BLK
+15V
GND
R65
1/4W
2K2
R62
1/4W
4K7
GND
C65
50V22U
+15V
R55
1/4W
47R
4148
D6
R3
1/4W
1M
R56
1/4W
47R
C61
50V100N
0.7Vdc
93Vdc
TL072C
83Vdc
C12
400V1N
GND
270Vdc
X39
PL2
1330M
GND
-15V
-15V
+15V
GND
GND
C4
100V6N8
R9
1/4W
100K
GND
W22
GRN
CHGND
.
93Vdc C8
400V2N2
V1:B
12AX7
R12
1/4W
FLMP
2K21
W31
YEL
IN
.
W32
YEL
IN
.
0.7Vdc R14
1/4W
220K
1/2W
680R
R98
1/2W
680R
R97
R26
1/4W
47K
0.7Vdc
V2:B
12AX7
+150V_RAW
V3:B
12AX7
+150V_RAW
R80
1/4W
470R
R81
1/4W
1M
S6:A
3436
JACKS+
W14 .
BLU
R24
1/4W
220K
C16
100V47N
C17
400V1N
C15
100V100N
R75
1/4W
470K
1/4W
R74
470K
R76
1/4W
820R
R73
5.0W
100R
.
1/4W
R100
10K0
R29
1/4W
47R
R2
1/4W
1M
3682
W2BRN
PLATE
R84
1.0W
220R
FLMP
3682
W1BLU
PLATE
.
W15
JACKS-
BLK BLK
.
W29
JACKS-
.
1/4W
R101
10K0
U1:A
TL072CP
R30
1/4W
470K
C23
100V220P
R49
1/4W
620R
50V
C26
22U
22U
50V
C64
50V
22U
C63
C34
100V100P
R63
1/4W
220K
C57
100V
100N
C54
100V
100N
Q7
5103
TO92
MPSA06
1/4W
6K8
R40
D3
4148
LD1
CLN
GRN
5908
Q6
5103
TO92
MPSA06
K1:C
R88
1/4W
100K
R34
1/4W
10K
R44
1/4W
10K
R45
1/4W
10K
C22
100V100N
Q8
5102
TO92
BC560C
R47
1/2W
1K
R38
1/4W
10K
C21
100V100N
Q5
5102
TO92
BC560C
D2 4148
R96
1/2W
2K2
Q10
5104
TO92
MPSA56
R57
1/4W
470R
Q9
5103
TO92
MPSA06
R54
1/4W
4K7
C30
100V220P
LD3
BOOST
RED
5906
LD2
OD
YEL
5907
R35
1/2W
1K
R59
1/4W
10K
C32
100V10N
R60
1/4W
10K
C27
50V22U
C28
50V22U
NET00050
BOOST
S3:B
3522
R33
1/4W
47K
R32
1/4W
47K
BE
TO-92
BC550C
C
C5
250V
4N7
BC
TO-92
E
MPSA56
MPSA06
C6
63V
330N
R17
1/4W
1K54
R16
1/4W
113K
R15
1/4W
1M
C2
250V10N
R4
1/4W
1K54
C18
100V
470P
P4:A
4425
M
15A
500K
CLN DRV
K1:B
C3
250V100N
C9
50V
22U
C10
100V
3N3
C58
100V
470P
R21
1/4W
1M
R6
1/4W
1K54
R7
1/4W
113K
R82
1/4W
1M
.
JACKS+
BLU
W30
V3:A
12AX7
C13
63V
330N
C45
400V
22N
C44
400V
22N
R77
1/4W
820R
1/4W
562R
R103
1/4W
562R
R102
P7:A
4425
M
15A
500K
OD VOL
C24
100V
22N
R27
1/4W
100K
R28
1/4W
100K
R85
1.0W
220R
FLMP
R48
1/4W
100K
K3:A
3696
3682
W18BLK
SPKR-
R95
1/4W
MINI
470R
K2:B
C35
63V
150N
6541
J6
REV RTN
R36
1/4W
47R
R39
1/4W
10K
R46
1/4W
75R
D4
4148
8
V+
4V-
U1:C
R37
1/4W
100R
R42
1/4W
220R
R58
1/4W
4R7
.
8
V+
4V-
U2:C
C31
100V
100N
CH SEL
S2:A
3522
W24
GRN
CHGND
.
R61
1/4W
100K
C25
50V
22U
R50
1/4W
620R
RING
J1
FUNCTION
"STYLE_P32"
K3:B
103Vdc
PLATE
8.0Vdc
C46
250V4N7
103Vdc 270Vdc
0.8Vdc
C11
400V2N2
NET00037
NET00057
R10
1/4W
220K
R11
1/4W
220K R89
1/4W
220K
89Vdc
V1:A
12AX7
50V
C39
33N
W34
BLK
INGND
.
BRIGHT
S1:B
3522
S1:A
3522
BRIGHT
C47
100V100N
R79
1/4W
82K
R83
1/4W
10K
3682
RED
HI V
W3
3682
W17GRN
SPKR+
S6:B
3436
5.0W
100R
R99
3923
J9
V2:A
12AX7
P1:A
4424
M
1B
100K
TREBLE
C33
100V
100N
R66
1/4W
220K
R52
1/4W
10K
R51
1/4W
10K
U1:B
TL072CP
C59
100V
470P C29
100V220P
R53
1/4W
4K7
S3:A
3522
BOOST
R43
1/4W
4K7
C20
100V
100N
C19
100V
100N
4148
D1
D5
4148
S TR
J2
S TR
J8
DSG
TO-220
IRF830
C1
50V
22U
C7
400V
2N2
C14
400V
2N2
P5:A
4425
M
15A
500K
OD DRV
R13
1/4W
220K
R18
1/4W
1M
R20
1/4W
100K
W33
BLK
INGND
.
R5
1/4W
113K
K2:A
3696
K1:A
R78
1/4W
100K
6BQ5
V4:A
6BQ5
V5:A
P2:A
4425
M
15A
500K
BASS
P3:A
4423
M
15A
20K
MID
P6:A
4425
M
15A
500K
CLN VOL
R22
1/4W
1K54
R23
1/4W
113K
R25
1/4W
220K
M
1B
P8:A
4424
100K
REVERB
U2:B
TL072CP
R64
1/4W
18K
6541
J7
REV DRV
R31
1.0W
1K
Mini
S2:B
3522
CH SEL
R41
1/4W
4K7
MINI
1/4W
100R
R19
SRT J5
Gold Gold .
AMP IN
3696_DRW
SRT J3
Gold Gold .
FT SW
SRT J4
---
PRE OUT
NODE VOLTAGE TEST CONDITIONS
LINE VOLTAGE: 120Vac
OUTPUT LOAD: 8 OHMS
NO INPUT SIGNAL APPLIED
U2:A
TL072CP
1
2
3
5
4T2
BLU
BLK
GRN
BRN
RED
3700_DRW

11 11
10 10
9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
M
M
N
N
O
O
P
P
Q
Q
of
Filename:
PCB# Sheet 32
Product
Date: 7V00
M647-7V00sch.sch2002
M647
PowerSupply
Mon Sep 11, 2006 Rev:
YCV20
of
Filename:
PCB# Sheet 32
Product
Date: 7V00
M647-7V00sch.sch2002
M647
PowerSupply
Mon Sep 11, 2006 Rev:
YCV20
S5
+15V
GND
GND
GND
T1
1330
PLATE SCRN
HI1
W25:G
W25:H
GND
W25:E
W25:D
GND
W25:A
W25:B
W26:G
W26:H
W26:D
W26:E
W26:B
W26:A
T400mAL
F1
FUSE
NET00093 W39:H
W39:G
NET00080
NET00099 W39:D
W39:E
NET00082
W39:A
W39:B
BLK
8
PR2
GRN
3
GRY
4
YEL
5
GRY
RED
7
HTR2
4007
D9
4007
D8
3.2Vac
-15Vdc
+15V
NET00048
NET00065
NET00077
R71
1.0W
FLMP
220R
R70
1/4W
FLMP
10R
R72
1.0W
10K0
R94
1/4W
10K
GND
GND
+15V
-15V
W25:F
W25:C
W25:I
IEC_RECT
IEC_RECT
W26:F
W26:C
W26:I
CE AC
SCH_SPDT
S5
NET00087
NET00098
NET00103
W39:I
W39:C
W39:F
9
1330E
BLK
3682
W11
120V
PR1
3682
W13BLK
120V
1
GRN
2
6
RED
3682
W9GRN
FIL
3682
W8GRN
FIL
LV1
4007
D14
LV2
HI2
3682
W6GRY
LO V
4007
D11
4007
D12
C36
350V
22U
4007
D7
3.2Vac
V4:B
C49
25V
470U
C48
25V
470U
C38
350V
22U
V5:B
-15V
R87
1/2W
18R
GND
GND
+15Vdc
C52
50V
100N
R86
1/2W
18R
DS
G
IRF830
Q11
6730
TO220
.
R67
1/4W
680K
R68
1/4W
470R
C62
100V 47N
272Vdc
+150V
C56
250V
4N7
W23
GRN
CHGND
.
S4:A
3522
STANDBY
C55
275V
22N 3682
W7GRY
LO V
4007
D13
4007
D10 C40
250V220N
C50
25V
470U
C51
25V
470U
R92
1/8W
100R0
FLMP
C53
50V
100N
R1
1/2W
18R
C41
350V
22U
C43
350V
22U
NET00066
NET00092
W38:H
W38:G
NET00095
W38:E
W38:D
+150V_RAW W38:A
W38:B
SCH_DPDT
3682
W19YEL
C.T.
154Vdc
R90
1.0W
10K0
R69
1/4W
FLMP
10R
C60
160V 10U
W38:I
W38:C
W38:F
Ribbon cables
3682
W10WHT
LINE
T1AL
FUSE
F1
For Euro - T400mAL
3682
W12
LINE
LD5
OPERATE
RED
6398
3682
W5RED
HI V
3682
W4RED
HI V
R91
1.0W
470R
LD4
STBY
YEL
6399
C37
350V
22U
OUTIN
GND
MC7915CT
6871
Function
U3
TO220
V3:C
V1:C
OUTIN
GND
6872
U4
MC7815CT
Function
TO220
212Vdc
283Vdc +150V_RAW
D16
1N5240BRL10V0
0W5
D19
1N5262B
0W5
51V0
D18
1N5262B
0W5
51V0
4007
D15
STANDBY
S4:B
3522
C42
350V
22U
D17
1N5262B
0W5
51V0
R93
1/8W
100R0
FLMP
V2:C
8
3
4
5
6
7
9
2
1
T1
GRN
GRN
YEL
GRY
RED
GRY
RED
BLK
BLK
.
9
10
11
12
13
MODEL(S):-
DATE VER# DESCRIPTION OF CHANGE#
1
2
3
4
5
6
7
8
TO 100K (4838) [GT]
(4866), R54&R53 TO 4K7 (4827), C35 TO 150N (5229), R88
PC#6716 CHANGE R66&R63 TO 220K (4841), R58 TO 4R7
Shifted footswitch jack by 200mil
.
.
5.10
5.00
5.00
06-OCT-2004
.
.
5-JAN-2004
16-DEC-2003 Added headphones, DI out, ext. spkr jack and spkr defeat
Fix shorts in Ver 3.00
D2
PC#6597 R31 2k2 1/2W to 1K 1W. Add C64,C65,R95,R96,
Updated targets
Fixed hole size on tube socket - added clinch hole
Force updated r70,r72 to fix hole size.
5.00
4.00
.
V3.00
.
V2.00
V1.03
V1.00
May, 12, 2003
.
Apr 07, 2003
.
21 Feb, 2003
19 Feb, 2003
YCV20
M647
FIRST PRODUCTIONFEB, 2003
16-DEC-2003 Connected jacks -ve to speaker -ve, reduced headphone gain
12
9
6
3
13
10
11
7
4
1
2
5
8
V
V
V
.
V
V
V
V
V
6.00
V
V
7.00
D
D
D
.
N
N
N
HOLES FOR #3522 DPDT SWITCH, UPDATED RELAYS
D
D
D
D
D
12-OCT-2005
D
23-MAY-2006
D
N
N
N
N
N
AH, PC#6937, CHANGE TUBE SOCKET DRILLING
N
N
PC#7125:GT:#3914 RCA JACK ->#6541, PC#7091: ENLARGE
KNOBPART#FUNCTIONREF
MODEL(S):-
{NEW}
YCV20
M647 POT LIST
MAR 2003
" "
" "
" "
" "
" "
" "
" "
N
N
N
N
#8430
#8430
#8430
#8430
#8430
#8430
#8430
#8430
K
K
K
K
#4424
#4425
#4423
#4425
#4425
#4425
#4425
#4424
P
P
P
P
TREBLE
BASS
MID
GAIN 2 (CLN)
GAIN 1 (OD DRV)
VOL 2 (CLN)
VOL (OD)
REVERB
F
F
F
F
P1
P2
P3
P4
P5
P6
P7
P8
R
R
R
R
12
9
6
3
13
10
11
7
4
1
2
5
8
V
V
V
V
V
V
V
V
V
V
V
V
V
D
D
D
D
N
N
N
N
D
D
D
D
D
D
D
D
D
N
N
N
N
N
N
N
N
N

SHEAR SHEAR
VCD
CLINCH
ORIGIN LONG AXIS
SHORT AXIS
INSERT
ORIGIN
7V00
Pcb MechM647
CLICK
IN
OUT
7V00Top Assy
7V00
M647
Top Assy M647
SEE PRODUCTION NOTE #1
SEE PRODUCTION NOTE #2
SEE LAYOUT DOCUMENTATION
V
T
R
V
T
R
C2
NC
C1 NO
NOL
NCL
NOR
NCR
CL CR
NC NOC
+
-
GUIDE
ETCH
+
-
NOL
NCL
NOR
NCR
CL CR
+
-
+
-
GUIDE
ETCH
+
-
NOL
NCL
NOR
NCR
CL CR
C2
NC
C1 NO
G1
G3
G2
SIG
RCA
GUIDE
ETCH
NOL
NCL
NOR
NCR
CL CR
7
21
G1
G3
G2
SIG
RCA
RING
TIP-SW
TIP
SLEEVE
RING-SW
7 7
7
7
CH SEL
CLN VOL
OPERATE
OD DRV
BOOST
BOOST
OD
CLN
MID
STBY
STANDBY
REV RTN
REVERBOD VOL
.
CLN DRV TREBLE
BRIGHT
INT. SPKR. DEFEAT
HEADPHONES
D.I. OUT
BASS
REV DRV
PRE OUT AMP IN
EXTERNAL SPKR
FT SW
5834
4425
6398
4425
5906
5907
5882
6871
5908
6435
4423
6399
3674
3674
3674
3983 3983
6872
3674
5865
6451
6541
44244425
6730
4425 4424
3436
3923
4425
65413732
3921
3732
3983
4148
1K54 113K
4N7 2N2
100K
220K 4148
1N
1K54
820R
10V0
100K
470P
51V0
100P
18K
4K7
10N
47K
620R
47N
1M
113K
10K2N2
22N
400V
1M
220K 220K
1M 4148
113K
10R 100N
4K7
33K
100N47R
10K
10K0
10K
470K
100N
220K
22U
50V
10N
1K54
22U
350V
100K
820R
330N
160V
10U
1M
RELAY 1C
82K
220K
100K
6N8
220K
470R
RELAY 2C
22U
350V
3N3 220K
330N 470P 4148
100R
50V
22U
10R
51V0
18R
1/2W
33N 220P
22N
500K
15A
22U
50V
25V
470U
113K 220P
220P
25V
470U
25V
470U
22U
350V
22U
350V
TL072CP
2K2
100K 100N
100N
100R0
MPSA06
10K
4R7
MPSA56
47K
22U
50V
RED
100N 100N
500K
15A
2K21
10K
MPSA06
18R
1/2W
RED YEL
50V
22U
1.0W
220R
470K
2N2
MPSA06
100N
1M
BC560C
1M
100K
470K
250V
220N
MC7915CT
TO220
GRN
47R
22U
350V
100N
1N
100N
47N
470R
47R
10K
22U
50V
275V
22N
20K
15A
22U
50V
1.0W
470R
YEL
10K
220K
100N
4K7
1K
1/2W
10K
4N7 100N
4007
1M
100K
10K
4K7
562R
1/2W
680R
4007
4007
100R0
4148
470P
470R
1.0W
10K0
1.0W
220R
22U
350V
6BQ5
2N2
75R
220R
1/2W
2K2
470R
51V0
25V
470U
100N
22N
400V
680K
6BQ5
MC7815CT
TO220
1K54
22U
50V
150N
47K
220K
100K
100N
TL072CP
4K710K
1.0W
1K
RELAY 1C
47R
100R
562R
4007
4007
4007
5.0W
100R
10K0 680R
1/2W
250V
4N7
4007
4007
4148
10K
100K
1B
5.0W
100R
1.0W
220R
BC560C
500K
15A
IRF830
500K
15A
100K
1B
6K8
1K
1/2W
620R
22U
50V
4007
500K
15A
12AX7
12AX7
1.0W
10K0
18R
1/2W
BUTTON
12AX7
2/5
3/5
7V00
1/5
M647
M647
7V00
M647 5/5
M6477V00
M647
4/5
M647
7V00
Shear after auto-insert - 10"
.
IN
W31
YEL
D4
R17 R16
C5
X3
C8
R20
R10
D3
X5
X51
C12
R22
R76
D16
R48
C58
D17
C34
X57
R64
R62
X41 X22
X42
C32
X45
X34
R33
X27X27
X60X60
R50
XC51
X28X28
C62
R3
R5
X19 R45
C14
X24
X21
C45 X2
R82
R13 R14
R81 D2
X15
X7
X12
R23
X20
X31
R69 C21
X13
X33
X18
R54
X54
X58
X50
X49 X52
R8
C15
R55
R51
R101
X47
X53
XC96
R60
R75
X17
X8
X40
C54
R66
SPKR+
GRN
W17
W30
.
JACKS+
BLU
HI V
RED
W3
PLATE
BRN
W2
.
IN
W32
YEL
C1
C2
R4
TJH3
.
INGND
W33
BLK
C42
R78
R77
C6
C60
R15 X16
X11
K2
R79
X39 X10
R11
R9 X9
C4
R89
WHT
S2
R95
K1
C43
C10 R25
C13
C18 D1
R19
C63
R70
D19
R87
C39 C23
C24
P6
C64
C51
X59
R7 C30
C29
X38
C48C49
C36
C37
U2
R65
R61
C31
X36
C57
GRY
W7
LO V
R93
RED
W4
HI V
W5
HI V
RED
Q9
R59
R58
Q10
W12
LINE
X43
R32
W15
BLK
JACKS-
W15
.
W20
SPKR-
BLK
C26
LD5
XC93
.
JACKS-
W29
BLK
PLATE
BLU
W1
SPKR-
BLK
W18
C20 C22
P5
R12 R44
Q7
R86
X1
LD3
WHT
S3
X32
LD2
C65
X29
X37
R84
R74
C11
Q6
C19
R21
Q5
R2
R27
R30
C40 U3
X14
LD1
R29
C38
C52
C17
X48 X55
X35
C33
GRY
W6
LO V
FIL
GRN
W9
C16
R57
R56
R52
C27
C55
P3
C25 TJH5
SPKR+
W16
BLU
R91
LD4
WHT
S4
R94
R63
C61
R43
R47
W37
R83
X30
X26
C46
C53
D15
X44
X56
R18
R88
X6
R39
R41
R103R103 R98
D8
D9
R92 W27
D5
C59
W28
R80
X46
R90R71
C41
V5
.
CHGND
W22
GRN
.
INGND
W34
BLK
C7
R46
R42
R96
.
CHGND
W23
GRN
R68
D18
C50
W26
3610
C47
C44
X25
R67
V4
U4
W36
3610W25
R6
C9
C35
R26
R24
R28
C3
U1
R53
R38
R31
K3
R36
R37
TJH1
BLK
W13
120V
C.T.
YEL
W19
R102R102
D14
D11
D13
3610W38
120V
W11 R99
R100 R97
WHT
W10
LINE
C56
D10
D7
J6
D6
3610W39
R34
P8
TJH2 R73
R85
Q8
P7
Q11
P4 P1
R40
R35
WHT
S1
R49
S6
FIL
GRN
W8
C28
D12
-
-
-
J2
J9
TJH4
YCV20
P2
.
CHGND
W24
GRN
J7
W14
BLU
JACKS+
W14
V1
J1
V2
-
-
-
J4
Gold
Gold
Gold J5
R72
R1
V3
Gold
#3450
J8
Gold
Gold
Gold
J3

2.
1.
TL072C
HOLE
RIBBON CABLE
LEAD/PIN REFERENCE
LEAD BENT AND TRIMMED
LEADS FOR W25 RIBBON CABLE MUST BE BENT AWAY
FROM PCB HOLE AND TRIMMED
SEE LAYOUT DIAGRAM PRODUCTION NOTES
MOUNTING DETAILS FOR Q11, U3 AND U4
#8837
#3850
#8800
Z437
#3796
Devices
C2
NC
C1
NO
3696_DRW
GSD
TO-220
IRF830
ECB
TO-92
MPSA06
MPSA56
CEB
TO-92
BC550C
G1
G3
K
1 9
NC
P
4
H
6
EL84
2
3
H
8
7
NC
5
G2
NC
"STYLE_P32"
NO1
NC1
NO2
NC2
COM1 COM2
3700_DRW
2G
2K
1 9
1K
1G
4
H
6
2
3
H
8
7
2P
5
HT
1P
12AX7A
11
8
5
2
12
9
6
13
10
7
3
4
1
D
D
D
V
V
V
N
N
N
D
D
D
D
D
D
D
V
V
V
V
V
V
V
N
N
N
N
N
N
N
12-OCT-2005 6.00 AH, PC#6937, CHANGE TUBE SOCKET DRILLING
23-MAY-2006 7.00 PC#7125:GT:#3914 RCA JACK ->#6541, PC#7091: ENLARGE
.. HOLES FOR #3522 DPDT SWITCH, UPDATED RELAYS
KNOBPART#FUNCTIONREF
MODEL(S):-
{NEW}
YCV20
M647 POT LIST
MAR 2003
" "
" "
" "
" "
" "
" "
" "
N
N
N
N
#8430
#8430
#8430
#8430
#8430
#8430
#8430
#8430
K
K
K
K
#4424
#4425
#4423
#4425
#4425
#4425
#4425
#4424
P
P
P
P
TREBLE
BASS
MID
GAIN 2 (CLN)
GAIN 1 (OD DRV)
VOL 2 (CLN)
VOL (OD)
REVERB
F
F
F
F
P1
P2
P3
P4
P5
P6
P7
P8
R
R
R
R
4
1
6
5
3
#
2
MODEL(S):-
PC#
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY
PENDING CHANGE
X
X
X
X
X
X
PC
PC
PC
PC
PC
PC
M647 PENDING CHANGES
YCV20
5
2
#
6
3
4
1
DATE
MODEL(S):-
VER# DESCRIPTION OF CHANGE
D
D
V
V
N
N
D
D
D
V
V
V
N
N
N
M647 DRILL HISTORY
YCV20
V07 PC#7125 AND #7091, SEE HISTORY TABLEMAY-23-2006
11
8
5
2
12
9
6
13
10
7
3
4
1
D
D
D
D
V
V
V
V
N
N
N
N
D
D
D
D
D
D
D
D
D
V
V
V
V
V
V
V
V
V
N
N
N
N
N
N
N
N
N
13
12
11
10
9
DESCRIPTION OF CHANGE
5
4
3
2
1
# VER#DATE
MODEL(S):-
8
7
6May, 12, 2003
..
4.00
V3.00Apr 07, 2003 PC#6597 R31 2k2 1/2W to 1K 1W. Add C64,C65,R95,R96,
D2
Fix shorts in Ver 3.00
FEB, 2003
19 Feb, 2003 V1.00 V1.03 FIRST PRODUCTION Force updated r70,r72 to fix hole size.
YCV20
M647
21 Feb, 2003 V2.00 Fixed hole size on tube socket - added clinch hole
Updated targets..
16-DEC-2003 5.00 Added headphones, DI out, ext. spkr jack and spkr defeat
16-DEC-2003 Connected jacks -ve to speaker -ve, reduced headphone gain
5-JAN-2004 Shifted footswitch jack by 200mil
5.00
5.00
06-OCT-2004 5.10 PC#6716 CHANGE R66&R63 TO 220K (4841), R58 TO 4R7
(4866), R54&R53 TO 4K7 (4827), C35 TO 150N (5229), R88
TO 100K (4838) [GT]
.
.. .

M647
YCV20
VER X.XX
*ALL BOARDS SHOWN FROM COMPONENT SIDE
12AX7
PREAMP
V3
V4
V5
CLEAN
INPUT
LEAD
INPUT
CLEAN
OUTPUT
LEAD
OUTPUT
V1:A V1:B V2:A V2:B
6BQ5
OUTPUT -VE
6BQ5
OUTPUT +VE
12AX7
PHASE- SPLITTER
12AX7
PREAMP
PREAMP BOARD
YCV20 - JAN. 15, 2004
THIS DIAGRAM APPLIES TO BOARDS THAT ARE VERSION 5.00 OR HIGHER
INPUT FX LOOP &
FOOTSW. BOARD
SPKR./HEADPHONE
BOARD
POWER SUPPLY
& OUTPUT BOARD