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ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L959_1.1.sch
DV78 SERIES PSU
Contact Engineer:
L959CT
22-Apr-2004
INITIALS
Printed:
1 1Sheet of
Notes:
Contact Tel: (01223) 203200Kevin Lamb
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
DGND
DGND
DGND
DGND
DGND
VN35V6
VN35V6 VN35V6VN35V6
DGND
115V
115V
6
4
2
1
5
3
7
TX1
Small Toroidal Mains
L924TX
D1
2KBP02
VN35V6
DGND
1
2
3
4
5
6
CON1
MOLEX
44472
L
N
E
SKT1
BULGIN
PX0580
C2
C1 C3
3N3
250V
CER
C4
3N3
250V
CER
1
3
4
2
L1
250U
SW2A
SDDFC30400
SW2B
SDDFC30400
1A
1
1B
2A
2
2B
115V 230V
SW1
18-000-0019
FHLDR2
20mm HLDR
FHLDR1
20mm HLDR
FS1 T315mA
S504
FS2
T315mA
S504
VN19V
EMC Shield
SH1
1
2
3
4
CON5
Amp
HD Pwr Con
VP5V
VP12V
DGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
CON7
MOLEX
52045
VN19V
VN13V5_F1
VN9V_F2
DGNDAGND
VP12V
VP15V5
VP5V
VP3V3
VP3V3
VN15V5
VP5V
VP3V3
VP3V3
VP3V3
VP3V3
VP5V
SPARE3
SPARE4
AC_PRES*
PSU_CLK
DGND
VP3V3
VP5V
SPARE1
SPARE2
C46
470UF
25V
YK
C39
220UF
16V
YXF
C54
1000UF
16V
YXF
C55
1000UF
16V
YXF
C45
470UF
25V
YK
C44
470UF
25V
YK
D4
UF4003
DO-41
C34
1N0 100V
CER
C36
1N0
100V
CER
C25
100N
100V
MKS2
C20
100N
100V
MKS2
C22
100N
100V
MKS2
C21
100N
100V
MKS2
C23
100N
100V
MKS2
C26
100N
100V
MKS2
C24
100N
100V
MKS2
C19
100N
100V
MKS2
C18
100N
100V
MKS2
R31
10R
0W25
MF
R18
10R 0W25
MF
R22
470R 0W25
MF
DZ5
BZX79C
5V1
DO-35
TR6
BD179
TO-126
R24
33R 0W25
MF
R5
4K7 0W25
MF
C40
220UF
16V
YXF
C17
100N
100V
MKS2
DZ6
BZX79C
12V
DO-35
R11
9K1
0W25
MF
R7
6K8
0W25
MF
R4
4K7 0W25
MF
R26
68R
0W25
MF
R27
2K7
0W25
MF
R25
100R
0W25
MF
R28
22R
0W25
MF
R15
10K
0W25
MF
C50
22N 100V
MKS2
C16
100N
100V
MKS2
C56
4N7
100V
CER
TR8
BC556B
TO-92
M1
IRF640N
TO-220
C6
100N
100V
MKS2
C7
100N
100V
MKS2
COMP
1
VFB
2
ISEN
3
RT/CT
4
GND
5
OUT
6
VCC
7
VREF
8
IC1
UC3843AN
DIP-8
TR7
BC556B
TO-92
DGND
TR3
BC546B
TO-92
R13
10K
0W25
MF
VP5V
PSU_CLK
C35
1N0 100V
CER
R19
10R 0W25
MF
C33
1N0 100V
CER
R23
33R 0W25
MF
AGND
C41
470UF
25V
YK
C9
100N
100V
MKS2
C10
100N
100V
MKS2
C12
100N
100V
MKS2
R20
470R
0W25
MF
D2
UF4003
DO-41
C42
470UF
25V
YK
C13
100N
100V
MKS2
D3
UF4003
DO-41
C11
100N
100V
MKS2
VP15V5
VN15V5
VN13V5_F1
VN9V_F2
VP5V
VP3V3
VP12V
VN35V6
R3
4K7
0W25
MF
TR2
BC546B
TO-92
R6
6K8
0W25
MF
C31
22UF
63V
YK
VP5V
DGND
AC_PRES*
R9
1K0 0W25
MF
TR4
BC546B
TO-92
C47
22P
100V
N150
DGND
R8
1K0
0W25
MF
C14
100N
100V
MKS2
R10
1K0 0W25
MF
C15
100N
100V
MKS2
VN35V6
5V_NFB
3V3_NFB
3V3_NFB
5V_NFB
C51
22N
100V
MKS2
L6
6U8 2.1A 8RHT2
L7
6U8 2.1A 8RHT2
L5
33U 1.17A 8RHT2
L3
33U 1.17A 8RHT2
L4
33U 1.17A 8RHT2
VN35V6
VN35V6
VN13V5_F1
C29
22UF
63V
YK
MAINS SUPPLY
FOR EXT. AUDIO
SUPPLY TX
C49
22N
100V
MKS2
R14
R29
82K 0W25
MF
NF
NFB (To Controller E/A)
(NFB From PSU Outputs)
GREY
4
DK GREY
3
LT GREY
2
BLUE
1
CON2
WAGO
256
GREY
2
GREY
1
CON4
WAGO
256
GREEN
1
CON3
WAGO
256
GREY
WHITE
BLACK
BLUE
R16
47K
0W25
MF
C53
1000UF
16V
YXF
C8
100N
100V
MKS2
QTY DESCRIPTIONPART No. NOTESITEM
ITEM1 1 Clip For SW Profile HeatsinkF006
ITEM3 2 Fuseholder Cover For 20mm FuseholderF022
ITEM2 1 Sil Pad For TO-220 HS InsulatorF082
ITEM4 1 Blank PCB DV78 PSUL959PB
C37
100UF
50V
YXF
C38
100UF
50V
YXF
C57
470UF
25V
YXF
C30
22UF
63V
YK
C43
470UF
25V
YK
NF
NF
1
2
3
4
5
6
7
8
CON6
AMP
CT
NF
R32
C5
AGND
DGND
LK2
ITEM5 1 Earth Lead Assy 75MM8M101 SAFETY EARTH WIRE FROM IEC INLET SK1 TO METAL CHASSIS
L2
LK1
0R0 0W25 MF
D5
1N4148
DO-35
1
FIX2
Dia 3.5mm
1
FIX4
Dia 3.5mm
1
FIX5
Dia 3.5mm
7
2
3
16T
16T
22T
14T
10T
8
1 11
10
9
12
4
41T
41T
5
6
SCR
TX2
Ferrite Switch Mode
L925TX
DGND
FD1
FD2
TOOL1
TOOL2
TOOL3
TOOL4
C27
1000UF
63V
YK
C28
1000UF
63V
YK
C48
1N0
100V
CER
TR5
BD179
TO-126
R12
10K
0W25
MF
D6
31DQ10 DO-201AD
D7
31DQ06 DO-201AD
D8
UF5406
DO-201AD
R21
470R
0W25
MF
C32
470pF
1kV
DE
DZ4
BZX79C
5V6
DO-35
1
FIX1
Dia 3.5mm
1
FIX3
Dia 3.5mm
1
FIX6
Dia 3.5mm
NF
NF
R17
10R
0W25
MF
TR1
BC547B
TO-92
DZ1
BZX79C
2V7
DO-35
R1
22K
0W25
MF
R2
220R
0W25
MF
HS1B
SW38-2
10.2C/W
NOTE TRANSFORMER TX1 IS MOUNTED ON
THE CHASSIS AND CONNECTED TO THE PSU
PCB BY CON2,3,4. TX1 IS SHOWN ABOVE FOR
CIRCUIT OPERATION
NF
R33
1K0
0W25
MF
USED TO SECURE TRANSFORMER CABLES TO PCB NEAR CON1
NF
ITEM7 2 Rivet CopperHP007S RIVETS TO SECURE IEC INLET TO PCB
DZ2
BZX79C
10V
DO-35
DZ3
BZX79C
3V3
DO-35
NF
C52
330P
100V
N750
R30
0R22
3W
SPRX
1.0
Production release02/07/03KAL03_E195
1.1
Make CON1 fitted (used in DV29)22/04/04PG04_E046
ITEM6 1 Cable Tie 100MM X 2.5MMF044