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SW2A
SDDFC30400 DGND VP5V
SKT1
BULGIN 1 TX1
SH1 PX0580 Small Toroidal Mains
NF L924TX
EMC Shield D1 R1 DZ2 R6
115V 22K BZX79C
C1 C3 FHLDR1 5 2KBP02 6K8
2A
2B
0W25 10V
2
3N3 20mm HLDR C29 0W25
NF C5 MF DO-35 D5
N 250V 2 22UF MF
22N
4
3
CER 63V AC_PRES*
115V 230V FS1 T315mA 100V DZ3
E L1 3 YK
250U SW1 MKS2
S504 BZX79C 1N4148
L 18-000-0019 6 C27 C28 C8 C31
DO-35
1
2
1A
1
1B
C2 C4 1000UF 1000UF 100N 12V 22UF
115V DO-35 VN21V5_F1
3N3 FHLDR2 63V 63V 100V TR2 63V
NF
250V 20mm HLDR YK YK MKS2 YK
CER 4
DZ1
FS2
7
T315mA L2 BZX79C DZ4 C30 DGND
BLACK
WHITE
GREY
S504
BLUE
2V7 BZX79C 22UF BC546B
SW2B DO-35 5V6 63V TO-92
NF DO-35
SDDFC30400 YK
R2
R3
VN27V
LK1 4K7
150R
TR1 0W25
0W25
MF
4
3
2
1
1
2
1
MF BC547B
0R0 0W25 MF TO-92
GREY
DK GREY
LT GREY
BLUE
GREY
GREY
GREEN
C6 C7 VN35V6
100N 100N
100V 100V
MKS2 MKS2
CON1 CON2 CON3 CON4
MAINS SUPPLY WAGO WAGO WAGO
FOR EXT. AUDIO 3 6 256 256 256
D2 L3
SUPPLY TX
2 5 NOTE TRANSFORMER TX1 IS MOUNTED ON AGND
VP15V5
THE CHASSIS AND CONNECTED TO THE PSU
1 4 PCB BY CON2,3,4. TX1 IS SHOWN ABOVE FOR 33U 1.17A 8RHT2 LK2
CIRCUIT OPERATION C32 UF4003 C37 C41 C12
This board is based on the DV78 series PSU 470pF DO-41 100UF 470UF 100N NF
L959AY, but with some different component MOLEX 1kV 50V 25V 100V
values for different VFD supply voltages. It uses 44472 DE YXF YK MKS2
the same blank PCB
DGND CON5
4
VP5V
R20 R21 C38 C42 C13 AGND 3
470R 470R 100UF 470UF 100N 2
L4
0W25 0W25 50V 25V 100V 1
D3 33U 1.17A 8RHT2 VP12V
MF MF YXF YK MKS2
VN15V5
Amp
DGND HD Pwr Con
UF4003
C9 C10 C11 NF
DO-41
100N 100N 100N
100V 100V 100V
MKS2 MKS2 MKS2
TX2
CON6
DGND DGND Ferrite Switch Mode
L925TX TR6 8
VP5V
BD179 7
D4
4 TO-126 6
5
R12 VN16V_F2
41T 4
10K VP3V3
3
5V_NFB 0W25 5 UF4003 SPARE1 2
(NFB From PSU Outputs) MF TR5 C33 DO-41 SPARE2 1
3V3_NFB R22
BD179 R23
VP5V TO-126 41T C39 C43
220R
6 220UF 470UF DGND AMP
0W25 DZ5
33R 0W25 16V 25V CT
1N0 100V MF
1 11 MF YXF YK NF
R8 R11 R7 CER BZX79C
1K0 9K1 6K8 R17 16T 22T 6V2
0W25 0W25 0W25 10R 12 DO-35
MF 0W25 VN21V5_F1
MF MF 2
MF 9 CON7
C18 C19
16T 14T 100N 100N 32
5V_NFB VN27V
3 10 100V 100V 31
C14 C49 NFB (To Controller E/A) VN16V_F2
DZ6 C17 C40 MKS2 MKS2 30
100N 22N 3V3_NFB VN21V5_F1
BZX79C 100N 220UF 7 29
100V 100V 12V 100V 16V 28
MKS2 MKS2 VP3V3
R9 TR3 TR8 DO-35 MKS2 YXF 10T 27
PSU_CLK BC546B 8 26
VP3V3
TO-92 BC556B D7 25
L6
1K0 0W25 TO-92 VN35V6 VN35V6 VN35V6 24
VP3V3
SCR
MF VN35V6 DGND 23
VP5V
IC1 22
7
VP3V3
2 UC3843AN 6U8 2.1A 8RHT2 21
VCC
VFB 31DQ06 DO-201AD
DIP-8 DGND 20