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B
C
D
A
1
RED
W20
2
PRE-AMP
12AX7A
YELLOW
YELLOW
R4
V1:A
1/4W
47K
2X_TRIODE_HCT
W3
3
W2
{Body}
RING
BLACK
BLACK
W4
W1
4
K1:A
K2:A
5
6
7
C17
C18
V1:B
10N
250V
1N5
500K
15A
PRE-AMP
P1:A
M
DRIVE
12AX7A
8
9
10
4007
R74
C52
1/4W
250V
100N
2K2
D11
11
Transformer
12
SPST Switch
3
RED
1
S7
BLK
F1
RED
4
T2A
D3
5
4007
T2
GRY
D4
13
1324
4007
IEC_RECT
YEL
4007
GRY
D5
6
BLK
4007
2
7
GRN
D6
GRN
8
14
12AX7A
V3:C
15
6.3V
300ma
IRF830
MJE340
MPSA06
16
E
C B
E
B C
C
B E
G
D S
17
TO-220
TO-126
TO-92
TO-92
"STYLE_P32"
A
B
C
D
E
F
G
H
R58
K2:B
C34
1/4W
6N8
100V
470K
R56
R57
1/4W
1/4W
100K
470K
C16
47N
250V
C33
1N
400V
100K
1B
TREBLE
C35
P8:A
220P
100V
M
C23
47N
100V
500K
500K
15A
15A
P9:A
M
P7:A
M
BASS
C22
47N
100V
BRIGHT
20K
15A
P6:A
M
MID
R11
1/4W
113K
C32
470P
100V
100K
1B
R14
1/4W
C19
P2:A
100K
M
10N
250V
RAD
TREBLE
PRE-AMP
12AX7A
C20
47N
100V
V2:A
R114
1/4W
200V
100K
.
500K
15A
P3:A
M
BASS
C21
47N
100V
20K
15A
P4:A
M
MID
STANDBY
S3:B
BC550C
Q9
5101
R52
D24
0W5
1/4W
TO92
20V0
1N5250B
2K2
D7
4007
D8
4N35
6
4007
1
Q1
4007
7824
5
IN
OUT
2
D9
4
GND
4007
U3:A
U3:B
D10
Val
V1:C
V2:C
V4:B
V5:B
2X_TRIODE_HCT
2X_TRIODE_HCT
E
F
G
H
I
J
K
L
M
R112
C71
1/4W
470P
100V
27K
.
R22
R23
C24
1/4W
1/4W
22N
400V
100K
100K
.
.
V2:B
PRE-AMP
12AX7A
K1:B
MPSA06
Q2
5103
TO92
500K
15A
R24
1/4W
47K
P5:A
M
.
MASTER
R64
1/4W
47K
REVERB SEND
U2:B
16V
100U
U2:C
C9
NE5532N
R67
1/4W
10K
C64
R97
4N7
250V
1/4W
S3:A
10K
MINI
REVERB RTN
RCA
J7
200V
2N2
C75
U1:B
50V
IRF830
U1:C
Q8
D
NE5532N
R102
G
1/4W
470R
R72
S
1/4W
1M
C63
47P
100V
BC550C
R101
Q12
1/4W
5101
2K2
TO92
MJE340
R94B
R94
R93
R79
5.0W
1/4W
1K
8K2
8K2
.
47K
1/2W
1/2W
Q10
R106
1/4W
100K
I
J
K
L
M
N
O
P
Q
K1:C
MPSA06
C45
Q11
100N
50V
5103
R111
CHANNEL
TO92
Q3
1/4W
5103
1K
R31
Q6
1/4W
TO92
5101
10K
MPSA06
TO92
BC550C
K2:C
C46
1N
50V
BOOST
BC550C
R32
Q7
1/4W
5101
10K
.
TO92
R62
1/4W
220K
MINI
RCA
SPLITTER
J8
12AX7A
C47
R87
C49
100N
100V
1/4W
22N
400V
820R
V3:A
R48
1/4W
R47
10K
1/4W
470R
100K
1B
SPLITTER
V3:B
P11:A
M
12AX7A
R86
C50
1/4W
C48
22N
400V
820R
100N
100V
C51
82N
100V
20K
15A
22U
PRESENCE
M
C12
P10:A
PHONE_PLUG
+
+ to tip
TO J5
YCV40:
YCV40WR:
7080 12" 8R
7081 12" 8R
80WPGM
60WPGM
BIAS 350mV ACROSS R91
10K
AND ACROSS R92
4520
P12
M
BIAS
PHONE_PLUG
+
+ to tip
+
MPSA56
MPSA56
TO J5
R80
Q4
Q5
1/4W
5104
5104
47K
TO92
TO92
YCV40T:
TUBE10 10" 8R
30WPGM X 2
3700_DRW
N
O
P
Q
R
S
T
U
FOOTSWITCH
T
R
S
J2
Gold Gold
.
50V
22U
U2:A
C2
T
R
NE5532N
-
-
R109
1/4W
100K
C66
220P
100V
PRE-AMP-OUT
R108
1/4W
10K
T
R
Gold
.
R107
NE5532N
1/4W
10K
C3
U1:A
22U
50V
R40
1/4W
27K
C65
470P
100V
OUTPUT XFMR
Val
V4:A
1324M
OUTPUT
J5
5
T
R
S
R89
BLU
220R
-
-
-
2
1.0W
GRN
FLMP
RED
4
T1
1
BLK
3
BRN
EXTENSION
J6
T
R
S
R90
-
-
-
220R
1.0W
V5:A
FLMP
OUTPUT
Val
M581 PCB HISTORY
MODEL(S):-
YCV40
#
DATE
VER#
DESCRIPTION OF CHANGE
1
NOV/02/00
1.00
FIRST PRODUCTION
2
NOV/08/00
.
PC#6305 R63 2K2->3K3 R40 24K->27K
3
DEC/14/00
2.00
PC#6311 ADD D16,D17,R97 AT U2
4
FEB/23/01
2.10
PC#6326 HOLE SIZE FOR C53 .070"->.047"
5
APR/30/01
3.00
PC#6419 ADD Q12,R103 R50 2M2->680K
6
.
.
R100 10R 1W->1R 1/4WFP R101 10R/1W->820R 1/4W
7
MAY/25/01
.
PC#6407 R103 680K->1M
8
JUN/21/01
4.00
PC#6420 ADD R100 220K 2W ACROSS C55
9
NOV/30/01
5.00
PC#6475 R105,R104-Q9 REPLACED BY D15,D18,D19,D20
10
.
.
D21,D22 6X 51V ZENER C60 220N->10u 450V
11
JAN/15/02
6.00
NEW SOLDERMASK FOR TABS & RCA JACKS
12
MAY/03/02
6.10
ADD ROUTING BY OUTPUT TUBES
13
MAY/27/02
6.20
PC#6537 R71 2K2->3K3 P11 20KA->100K
1
JUN/24/02
6.30
PC#6539 R106 100K->47K
2
JUL/04/02
7.00
PC#6545 MOVE X57 AND C60
3
SEP/03/02
7.10
PC#6562 R106 47K->100K D15->J76
4
MAR/17/03
8.00
MOVE AC TABS APART FOR CE COMPLIANCE
5
MAR/27/03
9.00
MOVE BREAKAWAY PCB'S TO AID ASSEMBLY
6
AUG/25/03
10.00
PC#6624 UPDATE 9 PIN TUBE SOCKETS
7
NOV/12/03
10.01
TRACE ARTWORK FIXED MANUALLY
8
DEC/03
11.00
CONVERT TO PCAD 2002
+
9
OCT-15-2004
.
GT:PC#6744 & 6748: APPLIED YCV50 STANDBY
10
.
.
CHANGES (SEE YCV50 V2.00 SCHEMATIC FOR DETAILS)
11
DEC-02-2004
.
GT:PC#6776 MOVED TOP MULTIPLE TO ADD ZIPPER
12
JUN-15-2005
12.00
AH, PC#6866, ADD CONNECTION PREAMP-STANDBY
13
.
.
#6933, CHANGE R78 TO 27K AND ADD TRIM POT 10K
1
.
.
PC#6965, MOVE ARC TRACE AWAY FROM TUBES
2
.
.
PC#6967, INCREASE CLEARANCES NEAR OUTPUT TUBES
3
DEC-14-2005
12.01
PC#7053:GT:R53 4850 3K9 -> 4864 2K7
4
MAY-18-2006
13.00
PC#7125:GT:J7&J8 #3914 RCA JACK->#6541. PC#7091
5
.
.
ENLARGE HOLES FOR S3-S6 #3522 FOR KINK LEADS
6
.
.
MOVE C3 FOR DEPT -59 FOR COLLISION AVOIDANCE
7
.
.
MOVED W8 TRACE AWAY FROM SCREW HOLE, MOVED
8
.
.
XC50 BREAKAWAY DOWN IN LINE WITH XC54
9
D
V
N
10
D
V
N
11
D
V
N
12
D
V
N
13
D
V
N
Product
Product
YCV40
YCV40
TUBE GUITAR AMP
TUBE GUITAR AMP
PCB#
PCB#
M581
M581
Sheet
Sheet
Date:
Date:
Mon Sep 11, 2006
Mon Sep 11, 2006
Rev:
Rev:
13V00
13V00
Filename:
Filename:
M581-13V00sch.sch2002
M581-13V00sch.sch2002
R
S
T
U
V
1
2
R61
1/4W
620R
3
J4
S
-
4
5
S
.
J3
6
7
8
9
10
11
12
13
14
15
16
1
1
of
of
2
2
17
V
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