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MD-DR470H/MD-DR480H
MAIN PWB-A
A
B
C
D
+B
E
TP812
F
R832
680K
VOLDAC
R831
390K
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
+2.5V
Q843
FDG312 P
1
6
2
5
3
4
R870
330K
+B
R841
100K
1
2
3
4
5
6
7
8
9
GND
10
+B
C815
22/6.3
L811
47 µH
C825
270P
(CH)
R823
R822
R825
150K
C823
1.2M
5.6K
47P(CH)
10
OSCI
11
+
R820
270K
12
RT
+B
13
VCC
14
GND
C822
+
1
VREF
15
16
IC821
1.6V UP CONVERTER/
0-2V DOWN CONVERTER
+B
2
Figure 32 SCHEMATIC DIAGRAM (7/8)
D2
3
CK5
Q751
MCH6630
1
S1
G1
2
D2
3
15
L
+B
+B
+B
+B
VCC
20
19
18
17
16
15
14
13
12
11
IC813
74LCX244T
+B
LOGIC
TP813
+B
D811
TP811
C811
RB521S30
1
R852
C854
10K
R821
120P
(CH)
10K
9
8
7
6
CTL3
CTL1
OUT1
5
–
+B
4
PVCC
IC821
PGND
3
IR3M17U6
OUT2
2
MOD
–
1
CTL2
17
18
19
20
CK807
+B
+B
VDD4
+B
3
4
– 32 –
S2
4
C768
10
17
6
D1
G2
5
S2
4
C767
10
CK7
+B
+B
4.5V REGULATOR
C840
1
D843
MA793
D862
L862
10 µH
DG1H3
D841
DG1H3
C863
22/6.3
1
VDD4
2
Q863
3
MCH3409
C850
0.1
R850
100K
CONVERTER
5
D2
S2
4
3
L7
22
Q761
MCH6630
1
6
S1
D1
L7
G1
G2
2
5
22
D2
S2
4
3
TP743
IC842
+2.3V
6209B45M
JACKIN
1
5
2
3
4
DCEXT
RCPCNT
TP731
D844
C844
MA793
1
C843
1
TP842
L841
47 µH
5
4
IC841
8358B25C
2.5V DC/DC
CN
VCC_MAIN
PC
CH
PC
PL
PL
CH
6
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