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
3
2
Product
Date:
7V00
M647-7V00sch.sch2002
M647
PowerSupply
Mon Sep 11, 2006
Rev:
YCV20
of
Filename:
PCB#
Sheet
3
2
Product
Date:
7V00
M647-7V00sch.sch2002
M647
PowerSupply
Mon Sep 11, 2006
Rev:
YCV20
S5
+15V
GND
GND
GND
T1
1330
PLATE
SCRN
HI
1
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
IE
C_
RECT
IE
C_
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
W13
BLK
120V
1
GRN
2
6
RED
3682
W9
GRN
FIL
3682
W8
GRN
FIL
LV
1
4007
D14
LV
2
HI
2
3682
W6
GRY
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
D
S
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
W7
GRY
LO V
4007
D13
4007
D10
C40
250V
220N
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
W19
YEL
C.T.
154Vdc
R90
1.0W
10K0
R69
1/4W
FLMP
10R
C60
160V
10U
W38:I
W38:C
W38:F
Ribbon cables
3682
W10
WHT
LINE
T1AL
FUSE
F1
For Euro - T400mAL
3682
W12
LINE
LD5
OPERATE
RED
6398
3682
W5
RED
HI V
3682
W4
RED
HI V
R91
1.0W
470R
LD4
STBY
YEL
6399
C37
350V
22U
OUT
IN
GND
MC7915CT
6871
Function
U3
TO220
V3:C
V1:C
OUT
IN
GND
6872
U4
MC7815CT
Function
TO220
212Vdc
283Vdc
+150V_RAW
D16
1N5240BRL
10V0
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 PRODUCTION
FEB, 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
KNOB
PART#
FUNCTION
REF
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
