Page 1
OUT
P9
3PIN
1
2
3
R7
4.99K
R8
C3
100K
10u
R6
4.99K
VCC
BLACK
IN
RED
WHITE
VCC
VCC
C8
0.1u
C9
0.1u
C10
0.1u
C11
0.1u
C12
0.1u
P10
2PIN
C6
0.1u
R1
10.0K
R2
6.81K
C2
10u
R9
3.83K
P11
4PIN
1 2 3 4
N
E
E
R
G
3
VCC
E
U
L
B
6
D5Q
4
R10
3.83K
P1
1PIN
P2
P3
1PIN
1PIN
1
K1
FORMA
+
1
1
K2
FORMA
+
HOT
U1:A
1
S
2
Q
R
4013
Balanced Audio Technology
VK-600i/250i
Control & Indicators
Dan Smisko
ENGINEER
00250-00030 -B
06/22/05
LAST CHANGE
04/12/00
CREATED
1/2
PAGE
C4
10u
C7
0.1u
R3
100K
11
C5
10u
U2:C
9
10
8
4093
VCC
U4:A
8
C
C
5
V
DC
CV
6
TH
2
TR
4
R
Q
D
N
G
1
NE555
U1:B
8
13
S
D9Q
12
Q
R
0
4013
1
7
3
U2:D
12
13
4093
11
U2:A
2
3
1
4093
VCC
15
14
U2:B
5
4
6
4093
VCC
U3:A
13
D
Q0
R
4015
U3:B
D
R
4015
12
Q1
11
Q2
2
Q3
5
Q0
4
Q1
3
Q2
10
Q3
1
2
3
4
5
6
7
1
7
9
6
U5
9
L
C
A0
A1
A2
A3
A4
A5
A6
16
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
D
N
G
8
ULN2004A
1
2
R5
10.0K
VCC
R4
100K
Page 2
P4
1PIN
NEU
1
WHITE
J2
0
L
P5
1PIN
T1
6
J1
H
0
J3
L
0
1
BLACK
HOT
5
4
3
XFMRTALEMA
11
12
13
14
4 3
CR1
1
2
BRIDGE
VCC
C1
4700u
Balanced Audio Technology
VK-600i/250i
Power Supply
ENGINEER
Dan Smisko
00250-00030 -B
06/22/05
LAST CHANGE
04/12/00
CREATED
2/2
PAGE
Page 3
Page 4
Page 5
Page 6
Page 7
PCB 250-10B1.xls
Resistors
R25, R27
Caddock MP-820-300 Ohm 1%
R48
R35, R36
R57 - R59, R62, R63
7-May-03 VK-250 Rev. C-2
00250-20010-B Last Change:
R1, R2 10 Ohm 2W
R3 4.02K
R4 215K
R5 2K
R6, R7 1K 2W
R8, R12 .1 Ohm 3W Wirewound
Install .1 Ohm 5W Wirewound in
Parallel on the other side.
R9, R13 10K 2W
R21, R23 100k
R22, R24 237 Ohm
R26 Do Not Load
R28 10 Ohm
R29 Trimpot 1k
R30, R31 13 Ohm, 2W
R32 4.02k
R33 2K
5.1 Ohm 2W
R35 Trimpot 10 Ohm
10 Ohm
9/5/2003
R52 215k
R53 Zero Ohm Jumper
R54 Trimpot 25 Turn 500 Ohm
R55 2k
R56 7.5k 2W Install Two In Parallel
One is mounted under the board.
237 Ohm
R64 1k
R65 - R70 1 Ohm 3W Wirewound
R71 1k 2W
R72, R73 68 Ohm 2W
R74 1k 2W
R75 - R80 1 Ohm 3W Wirewound
R81 1k
R82 237 Ohm
R83 7.5k 2W Install Two In Parallel
One is mounted under the board.
R84 - R89 237 Ohm
R90 215k
R91 Zero Ohm Jumper
R92 Trimpot 25 Turn 500 Ohm
R93 2k
Page 1
Page 8
PCB 250-10B1.xls
Capacitors
Do Not Load C9 and C11.
Semiconductors
Install on Heat Sink.
Install on Heat Sink.
Relay
Relay Signal 2C G5V-2-H-DC6
Fuseholders
R107, R108, R114, R115 100K
R109, R116 4.99K
R110, R111, R117, R118 10k
R112, R113, R119, R120 1k
R121 100k
R122, R123 1k
R124 21.5k
R125 10k
R126 1k
C1, C2, C3 Alum. 470uF 100V
C4 WIMA 1uF 160V
C5 Alum. 22,000uF 25V
C6 Alum. 100uF 16V Radial
C7 - C12
C13, C14 Oil .22uF 630V
C15, C16 Film .22uF 250V
C19, C21 Film 2.7uF 100V
C20, C22 Alum. 100uF 16V Radial
C23 Alum. 100uF 10V
Alum. 10,000uF 80V.
CR1, CR4 Bridge DIP 1A 400V
CR2, CR3 Rect. Diode 1A 1000V
CR5 Diode Sw. Gen. Purp.
CR6, CR7 Do Not Load
CR10, CR11 10V 400mW Zeners
CR12, CR13, CR15-CR18 Diode Sw. Gen. Purp.
VR1- VR4 Zener 10V 400mW
Q1, Q4
Q2, Q3 Do Not Load
Q5 Trans. NPN 2N5088
Q6 - Q17 Do Not Load
Q19, Q20 Trans. NPN 2N5088
Q22, Q25 Trans. NPN 2N5550
Q23, Q26 Trans. PNP 2N5400
Q24, Q27 SCR S4025L
Q28 Trans. PNP 2N4403
U1
U2 Voltage Reg. Pos. 6V 7806
U6 Comparator LM311
LED2, LED3 Green LED
Power MOSFET IRF621.
Voltage Reg. Neg.12V 79M12.
K1
F1, F2 Fuseholder PCB
Page 2
Page 9
PCB 250-10B1.xls
Connectors
643426-1
643416-1
Heat Sinks
Resistors
Zero Ohm Jumper
2
RHR
2
1
7
3
J1 9 Pos. PCB Socket Header; AMP
J2 4 Pos. PCB Socket Header; AMP
Q1, Q4, U1 7020B-MT
Parts List 00200-20010-B Supplier
10 Ohm 3 RHR
237 Ohm 14 RHR
1k 9 RHR
2k 4 RHR
4.02k
4.99K 2 RHR
10k 5 RHR
21.5k
100k
215k
RHR
RHR
RHR
RHR
Page 3
Page 10
PCB 250-10B1.xls
Power Rsistors
4
7.5K 2W
4
RHR
2
.1 Ohm 5W Wirewound
2
RHR
Caddock 300 Ohm
2
RHR
Trimpots
2
Alum. 10,000uF 80V
2
BAT
Semiconductors
7
6
RHR
3
Voltage Reg. Neg. 12V 7912
Voltage Reg. Pos. 6V 7806
Relays
RHR
5.1 Ohm 2W 1 RHR
10 Ohm 2W 2 RHR
13 Ohm 2W 2 RHR
68 Ohm 2W 2 RHR
1K 2W
RHR
10K 2W
.1 Ohm 3W Wirewound 2 RHR
1 Ohm 3W Wirewound 12 RHR
Trimpot 10 Ohm 1 RHR
Trimpot 1K 1 RHR
Trim Pot 25 turn 500 Ohm 2 RHR
Mylar .22uF 250V
Mylar 2.7uF 100V 2 RHR
Alum. 470uF 100V 3 RHR
WIMA 1uF 160V 1 RHR
Alum. 22,000uF 25V 1 RHR
Alum. 100uF 16V Radial 3 RHR
Alum. 100uF 10V 1 RHR
Alum. 10,000uF 80V 4 RHR
Oil .22uF 600V 2 BAT
RHR
RHR
Bridge DIP 1A 400V 2 RHR
Rect. Diode 1A 1000V 2 RHR
Diode Sw. Gen. Purp.
Zener 10V 400mW
Power MOSFET IRF621 2
Trans. NPN 40V 200mA
2N5088
Trans. NPN 2N5400 2 RHR
Trans. PNP 2N5550 2 RHR
Trans. PNP 40V 500mA
2N4403 1 RHR
Comparator 311 1 RHR
SCR S4025L 2 RHR
Green LED 2 RHR
Relay Signal 1
Page 4
RHR
RHR
RHR
1 RHR
1 RHR
Page 11
PCB 250-10B1.xls
Connectors
4-pos. Socket Header
1
RHR
Fuseholder PCB 2 RHR
9-pos. Socket Header 1 RHR
Heat Sinks 7020B-MT 3 RHR
Screws M3x8mm 3 RHR
Nut M3 3 RHR
Page 5
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