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1
2
3
A
W1
B+3_233VDC
GRN
J1
R1
2
1
113K
.
1/4in JCK
3
3921
INPUT
C8
B
100N
INPUT/CLN
250V
RAD POLY
2
R34
2M2
V1:1
R3
.
49K9
.
C
R4
R2
C1
1M
1K54
22U
.
.
50V
2
W24_:2
W24:2
2
RAD .2in
2
W24_:1
W24:1
2
GND
GND
GND
D
C73
RAD .2in
10N
100V
B+2_234VDC
R30
E
470K
.
R5
113K
.
C30
P1:1
500K
15A
GAIN
22N
4425
400V
RAD POLY
2
OVERDRIVE1
F
R9
R116
220K
R7
V2:1
.
W250
100K
220K
.
.
R6
R10
C3
1K54
220K
2 W22:1
W22_:1
2
330N
.
.
63V
RAD .2in
2 W22:2
W22_:2
2
G
GND
GND
H
LD2
I
GRN
CH1
5908
R72
4K7
.
J
K
1
2
3
4
5
6
7
4PDT MINI
4PDT MINI
B+3_233VDC
NC
NC
NC
ALTERNATE
ALTERNATE
DOWN
UP
DOWN
UP
COM
COM
COM
S1:1
S1:2
3440
3440
R24
C72
NO
NO
NO
113K
470P
.
3440
3440
3440
200V
BEAD
R28
C17
220K
K2:2
.
1N
3700
400V
RAD .2in
RELAY 2C
C18
C10
NetC10_2
S3
330P
100N
100V
250V
CER
RAD POLY
7
K2:1
3700
INPUT/CLN
R35
R26
2M2
49K9
3522
3522
V1:2
RELAY 2C
.
.
P2:1
500K
C16
15A
R25
1U
1K54
4425
63V
.
RAD .2in
VOLUME (CLEAN)
1
1
4
W26_:1
W26:1
4
2
2
4
W26_:2
W26:2
4
3
3
4
W26_:3
W26:3
4
GND
4
4
4
W26_:4
W26:4
4
B+2_234VDC
W26_
W26
R12
DNS
C7
113K
R18
C31
1N
.
220K
400V
DNS
.
RAD .2in
NetC7_2
10N
NetC5_2
400V
OVERDRIVE2
RAD POLY
DNS
C5
R8
R15
7
OVERDRIVE1
2
DNS
W250
W250
220K
220K
2N2
R11
.
.
400V
220K
V2:2
V3:1
RAD .2in
.
R14
R13
R16
R17
1M
1K54
C74
470K
1K54
C6
.
.
470N
.
DNS
DNS
.
1N
63V
400V
RAD .2in
RAD .2in
1
N1055
2
3
GND
4
5
6
7
IG
GND
8
+15V
D2
75V
R75
R77
1N4148
1K
10K0
K2:3
K1:3
.
.
C32
3700
3700
RELAY 2C
RELAY 2C
R73
100N
R74
100R
63V
47R
.
RAD .2in
.
Q1
Q3
R79
Q2
W250
R80
1K
BC560C
W250
.
BC550C
TO92
10K0
TO92
5102
.
BC550C
5101
C33
R76
R71
TO92
10U
5101
10K0
4K7
16V
.
.
5X7MM .2in
-15V
GND
4
5
6
7
8
9
10
NC
C11
COM
3700
K1:1
1N
P5:1
400V
100K
NO
1B
RAD .2in
TREBLE
R22
R20
4424
82K
82K
.
.
C12
RELAY 2C
P4:1
47N
500K
100V
15A
RAD .2in
BASS
4425
3522
C13
R33
2M2
.
33N
P6:1
100V
20K
RAD .2in
15A
3522
MID
4423
R23
22K
.
GND
B+1_266VDC
OVERDRIVE2
7
DNS
C15
V3:2
DNS
100N
C9
250V
R19
R32
1U
RAD POLY
2M2
63V
DNS
.
.
RAD .2in
1
W20_:1
8
W20:1
8
N1162
2
W20_:2
8
W20:2
8
3
W20_:3
8
W20:3
8
4
GND
W20_:4
8
W20:4
8
5
W20_:5
8
W20:5
8
IG
6
W20_:6
8
W20:6
8
7
GND
8
W20_:7
W20:7
8
C68
8
W20_:8
8
W20:8
8
+15V
100N
NetJ7_6
W20_
W20
63V
RAD .2in
R81
R82
Q5
W500
W250
2K
4K7
.
.
5
J7
Gold
Gold
Gold
1/4in JCK
3450
FT.SWITCH
GND
T
R
S
LD1
6
RED
CH2
5906
3522
3522
CH1/CH2
GND
8
9
10
11
12
13
C19
R27
R36
RAD CER .2in
W250
W250
470K
47K
100P
R31
.
R29
.
100V
W250
W250
82K
82K
K1:2
.
.
3700
U1:2
6
TL072
-
6882
RELAY 2C
7
5
+
GND
R37
W250
C14
3N3
47K
.
100V
GND
RAD .2in
P3:1
500K
R21
15A
+15V
68K
.
4425
R48
5K6
6
-
.
U2:2
V+
1N4148
7
D1
C25
C26
75V
V-
5
+
TL072
6882
330N
330N
R47
63V
63V
33K
RAD .2in
RAD .2in
.
-15V
GND
C28
R50
R49
W250
W250
4K99
47K
C20
33N
.
.
100V
C35
RAD .2in
RAD .2in
33U
16V
1N
U3:1
RAD .2in
400V
2
-
1
3
+
NE5532N
R57
6884
W250
4K99
R54
.
47K
.
C29
33N
100V
RAD .2in
REVERB_GND
GND
R83
10K0
Q4
.
C36
33U
P7:1
16V
50K
RAD .2in
BLIN
REVERB
J111
4462
TO92
5119
D3
R53
1N4148
22K
TO92
75V
BC560C
.
5102
GND
R78
C34
22K
7
.
4N7
250V
W18
W18_
RAD .2in
NE5532N
6884
. .
. .
-15V
. .
. .
5
5
8
W18_:5
W18:5
8
6
6
8
W18_:6
W18:6
8
. .
. .
11
12
13
14
15
16
R39
W250
+15V
10K0
.
R41
U1:1
W250
2
TL072
-
620R
6882
V+
.
1
C22
3
V-
+
RAD .2in
22U
C21
R40
50V
5
J3
W250
RAD .2in
1/4in JCK
-15V
620R
22U
3498
.
50V
AMP OUT
R38
T
R
S
W250
10K0
6
.
-
-
-
IG
With MASTER on full:
50mVrms/1kHz input @ AMP IN
equals 8.3Vrms into 4 ohms.
6
J2
Gold
Gold
Gold
1/4in JCK
3450
T
R
S
AMP IN
C23
R42
R43
5
W250
W250
47K
10K0
22U
.
.
U2:1
50V
2
-
RAD .2in
TL072
C27
1
6882
3
330N
+
R46
63V
33K
RAD .2in
.
C24
R44
R45
W250
W250
47K
10K0
22U
.
.
50V
GND
GND
RAD .2in
FX1
1
7
FX1:1
REVERB_OUT
2
7
FX1:2
3
7
FX1:3
REVERB_IN
4
7
FX1:4
5
7
FX1:5
X61
6
7
FX1:6
N1145
J4
7
REVERB_GND
+5V
7
FX1:7
REVERB_GND
X54
BTDR-1HM
4083
GND
RCA
REV Send
6541
POWER AMP
C71
2N2
400V
RAD .2in
J8
R52
R51
W250
W250
X60
470K
47K
.
.
+15V
R102
RCA
4K7
6541
.
C51
REV Return
6
U3:2
-
V+
10N
100V
V-
+ 5
RAD .2in
X55
-15V
R56
R55
REVERB_GND
220K
22K
.
.
GND
REVERB_GND
Input
Section:
YGL2
Product(s):
PCB#:
M666
Rev#:
V03
EML Rev#:
01
Sheet
1
Modified:
2021-05-12
File:
Input.SCHDOC
Tmp Rev:
14
15
16
17
A
B
IG
C
IG
D
GND
E
F
G
H
I
J
K
Of
4
V031
17
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