Kenwood NX-300 Service Manual page 72

A B
NX-300
1
2
3
TX-RX UNIT
4
(X57-7370-XX) (B/2)
J79-0128-39 B/2
5
26 POW
OPT6
TXI RXEI
6
RXEO TXO
OPT2 OPT7
OPT11 OPT8
DTI OPT9
5V AGND
NC NC
7
AGND DGND
OPT5 OPT10
OPT4 NC
26P_TD 26P_RD
OPT3 OPT1
2
8
TXD1 RXD1
9
10
Component side
Layer 1
Layer 2
11
Layer 3
Layer 4
Layer 5
Layer 6
Foil side
12
13
72
14
C D
PC BOARD
TX-RX UNIT (X57-7370-XX) (A/2) -10 : K,K3 -11 : K2,K4
Foil side view (J79-0128-39 A/2)
C954
25
R915 C952
1
R912
C944
D705
E F
L614
C609 C668
C665
L612
C664
D711
R931
R790 C850
R791
D710
C804 C807
R786
L722
C802
C798
R772
L721
R775
C788
C796
R778
R779
G S
Q705 C782
G D
R770
R784
C786
Q706
L717
R780
C791
G H
C654
C663
CN600
C662
D709
C803
L725
R777
R773
C780
1 5
L716
IC703
R768
3 4
R769
C773 C768
L714
D704
C778
C776
R760
C775
D703
C771 R759
I J
C988
CN601
+
S
C769
R761
C741
C742
R753 C758
D702
R757 C765