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:
Rev:
YsType: YsType
M1423V03sch.sch2006
M1423
Tue Feb 28, 2012
power supply
V03
IronHorse (DH40H)
4007
D5
D9
4007
R55
1/
4W 15K
.
CH1343U
TRANSFORMER PLUGS
DIRECTLY INTO PCB.
WHITE
BLUE
YELLOW
BLACK
6.3Vac
D2
4007
D1
4007
4
6
W3:D
C19
250V
4N7
CH1343E
TX - YSPART#
CH1343
X1
X3
NOT APPLICABLE
NA (120V)
1
6
W3:A
6
6
W3:F
CE (220V)
NOT APPLICABLE
2
W6:B
2
2
W5:B
2
3
W2:C
3
1
W5:A
2
1
W2:A
3
2
W2:B
3
R31
1/
4W 100R
.
4007
D10
D11
4007
C1
500V
10N
4007
D3
4007
D4
R52
1/
4W 36K
.
63V
C31
10U
R63
1.0W
.
47R
R57
1.0W
.
47R
C13
450V
82U
63V
C33
10U
24.9Vdc
R56
5.0W
.
33R
C14
450V
10U
410Vdc
C16
450V
22U
302Vdc
C36
450V
22U
2
6
W3:B
W4
GRN
IGND
16AWG
5
6
W3:E
3
6
W3:C
1
W6:A
2
R30
1/
4W 100R
.
4007
D12
R53
1/4W
.
2K2
C34
63V
470U
P5
4520
M
Lin
10K
BIAS
C35
35V
220U
R26
1.0W
.
10K0
PENTODE
V5:B
{Voltage}
R27
1.0W
.
15K
R28
1.0W
.
15K
IN
REF
OUT
6731
U1
7824
TO220
{Watts}
+24 Reg
North America
Fuse: T1A
CE
Fuse: T400mA
S1
POWER
28Vac
FOR CE: CUT X1 & X3
AND WIRE W3:C to W3:E.
C24
250V
100N
CH1343U
SHOWN
USE ADAPTER PATCH CABLE
YS#3088. (SEE LAYOUT PDF
FOR CE MODIFICATION IF NO
PATCH CABLE IS AVAILABLE)
R51
1/
4W 36K
.
35Vdc
30.3Vdc
C15
450V
22U
411Vdc
352Vdc
279Vdc
R54
1/
4W 1M
.
R43
1/4W
.
22K
In FIXED BIAS mode with no signal, adjust
BIAS trim (P5) until voltage measures 45mV
each across R1 and R2
C22
63V
100N
IEC_RECT
C18
275V
22N
C37
63V
100N
XF_P2
XF_P1
TRANSFORMER PLUGS
DIRECTLY INTO PCB.
C41
63V
470U
2X_TRIODE_HCT
V2:C
{Voltage}
PENTODE
V4:B
{Voltage}
2X_TRIODE_HCT
V1:C
{Voltage}
4077
L1:A
3500mH
2X_TRIODE_HCT
V3:C
{Voltage}
XF_P2
XF_P1
MAINS OPERATING VOLTAGE
TRANSFORMER CABLE
CONNECTOR REQUIRES
MODIFICATION. SEE PCB
LAYOUT PDF FOR DETAILS.
POWER TRANSFORMER REFERENCE TABLE
