Panasonic KX-NS500AG Service Manual page 55

6
1 2
A
B
C302A
16 1u
R313A
(1)
22
DG
(2)
R314A
22
C303A
16 1u
C
C302B
16 1u
D
R313B
(3)
22
DG
(4)
R314B
22
C303B
16 1u
E
(5)
(6)
PG
F
G
7
R319A
2.2k
U303A
3
C304A
5
DG
4
50 1000p
R315A R317A
910 1.5k
R316A R318A
910 1.5k
1
C305A
2
50 1000p
6
U303A
R319B
2.2k
U303B
3
C304B
5
DG
50 1000p
4
R317B
R315B
910 1.5k
R316B R318B
910 1.5k
1 C305B
50 1000p
2
6
U303B
.
IC600
9
1 EN VIN 8
C607
PG PG 2 VFB VBST 7
GND2
3 VREG5 6 0.1u
SW
4 SS 5
GND1
PG
PG PG PG
PG
8
PT_TXA[0]
PT_TXA[1]
+3.3V
IC300A
3
+
PT_RXA[0]
1
2
-
+3.3V
IC300A
5
+
PT_RXA[1]
7
6
-
+3.3V
8
VCC
IC300A
GND
4
+3.3V
DG
C308
0.01u
16
+3.3V
DG
SIGN2931
8
IC300B
VCC
GND
4
+3.3V
IC300B
DG
3
+
1
2
- +3.3V
IC300B
5
+
7
6
-
L600 2.2u
50
PG
R621 0
R622 0
R640 0
R641 0
R642 0
R636 0
PG DG
DG
KX-NS500AG MOTHER BOARD NO.6 2/2
55
9
PT_TXA[0]
PT_TXA[1]
PT_RXA[0]
PT_RXA[1]
DG
PT_RXB[0]
PT_RXB[0]
PT_RXB[1]
PT_RXB[1]
PT_TXB[0]
PT_TXB[1]
+3.3V
+3.3V
KX-NS500AG
10