5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
0.047uF(X2)
LINE
2x2200pF(Y)
2x2.4mH
LOAD
J4
J3
J4
J1
J2
J1
115V
D16
D15
D19
D17
D21
Y
D20
230V
D22
HF-308
Y
D18
0V
P O W E R C I R C U I T
<RevCode>
4 1 / 2 D i g i t D i g i t a l M u l t i m e t e r
C
7
9
Thursday, April 14, 2005
Title
Size
Document Number
Rev
Date:
Sheet
of
R
R
Y
B
B
GND TERMINAL
B
B
R
R
Y
+5VA
+15V
-15V
-5V
+5VD
+5VD
+5VD
R98
1M
F3
F0.5A/250V
T1
POWER TRANSFORMER
1
2
-18V
0V
+18V
+8V
0V
NOT
POWER TRNAS
1
2
3
R82
10
R91
100
D24
AL105
U15
7815
1
3
2
VIN
VOUT
GND
R92
R88
1.5K
U17-A
U17-74HC00
1
2
3
1
2
3
R87
1.5K
R99
1M
+
C45-1
47uF
U20
7805
1
3
2
VIN
VOUT
GND
+
C44
10uF
+
C46-1
10uF
+
C52
47uF
C42
104
C56
104(C/C)*4
U17C
9
10
8
U18C
9
10
8
NOISE FILTER
NFU-101
U15
7915
1
3
2
VIN
VOUT
GND
R90
1.5K
R96
100
+
C47
470uF
5.1V 1/2W
ZDP1
C53
J13
7805
1
3
2
VIN
VOUT
GND
+
C41
2200uF
R94
R84
470K
1
2
3
1.5K
R
1
2
3
R33
100
SECONDARY
1
2
3
1
2
3
1
2
3
1
2
3
NFU-101
NOISE FILTER
L
N
G
+
C50
470uF
+
C48
104
U17D
12
13
11
C60
104
U18D
U18-74HC00
12
13
11
1
2
3
+
C43
407uF/
R83
470K
J14T
1
2
R95
100*4
C51
104
PRIMARY
1
2
3
R85
1.5K
R97
20
+
C49
47uF
C57
2200P/1KV
POWER S/W
1
2
3
C59
104
S3
POWER S/W
1
3
2
4
VOLTAGE SELECTOR S/W
5
4
6
1
2
3
C54
-
+
AL105 x4
1
4
3
2
-
+
AL105 x4
1
4
3
2
RP1
1K 1/2W
1
2
3
D23
AL105
U18A
1
2
3
C55
U17B
4
5
6
R86
1.5K
4 COM
3
2
1
9 DC
7 R
6 DIODE
5 FREQ .
4 HOLD
3 FREQ
2 GND
J10A
U10-11
5 A
K_20
7 DP1
7 V
6 mA
8 mV
2 OJHM
9 DP3
1 DP4
9 MOHM
1 KOHM
8 DP2
8 AC
