Kenwood NX-800H Service Manual page 89

AT
TX-RX UNIT (X57-739X-XX) (A/2)
HD2
X2_CLKIN
2
33M_4
BSHIFT
1
9
LINE
PROTECTION
D501
1SS388F
D502
1SS388F
9
450K
PLD
9
9
9
CONTROL (E23-1278-05)
CN506
CN612
TX-MODULE (E23-1278-05)
CN511 CN513
AU
SCHEMATIC DIAGRAM
3.31V
IC508
SM5023CNDH-G X502
18.432MHz
4 3
C530
Q VSS
0.01u
5 2 3
VDD XT oUTPUT
6 1
XTN INHN
4
VCC
BUFFER AMP
(18.432MHz)
C531
0.1u
D
50C
L518
80C
13
CN595
VCO (E23-1278-05)
CN509 CN611 CN512 CN516
CN614
RX-IF (E23-1278-05)
CN503 CN505 CN507
CN517
AV
NX-800/800H
2
R915
0
IC511
TC7SH08FU-F
1 INB
VCC
2 INA
3
GND
oUTY
AND
(PCS RF/HD2)
2
GND
R594 D
1k
1
VC
D
1
13
13
9
CN527 CN540 CN543
RX-FRONT (E23-1278-05)
CN510 CN502 CN504
TX-DRIVE (E23-1278-05)
CN520
AW
3.31V
5
D503
4
1SS416
REVERSW
CURRENT
PREVENTION
(PCS RF)
33GPS
D
RX-IF GND DIGITAL GND
R916
R562 0
0
R917
R548 0
0
R565 0
R574
R550 0
CN508
0
D
AVR (E23-1278-05)
CN542
X57-739 (A/2) 10/16
AX
2
1
450K
PLD
13
9
R534 0
C620
0.01u
D
89