Kenwood NX-800H Service Manual page 91

BD
TX-RX UNIT (X57-739X-XX) (A/2)
2
OPT10
11
VREF
R703
APC SMF
1.64V
C702
1u
10
PLD
1
9
13
MI2
MI1
ME
BE
SCHEMATIC DIAGRAM
2
ASQ DET
BRF/BUFFER
AMP (SQ)
ASQ BPF
R707
15k C716
220p
R727
270k
C718
220p
Q701
SSM3K15TE(F)
IC703
TC75W51FK(F)
1
2
R712
3
4
10k 68k
VSS
LPF
(APC/DEO)
C717
0.1u
RXAF SMF
IC701
TC75S51FE(F)
1 IN+ 5
VDD
C708
1200p
2
VSS
R704 R713
3 4
IN- oUT
56k 56k
1.62V
LPF (RXAF)
BF
NX-800/800H
11
2
R729
100k
C722
3.28V 47p
IC705
TC75W51FK(F)
C734
0.01
Q702
2SC4617(Q)
NOISE
AMP
3.28V
8
VDD
7
R737 R744 C735
47k 47k 4.7u
6
5
DEO BUFF
3.28V
1.62V
SCSW(RXAF)
IC707
TC7W53FK(F)
R738
1k
5
A
R728
6
CH1
7
0
CH0
8
VCC CoMMoN
3.28V
RXAF/RXEI SW
10
1
9
13
BG
SQ VOLTAGE
CONTROL
D702
R755
10k
HSC119
NOISE
DETECTOR (SQ)
D703
R760
RB706F-40
1.5k
C740
4700p
33A_2
4
GND
3
VEE
2
INH
1
10
0V
X57-739 (A/2) 12/16
BH
OPT10
11
2
VREF
VIN8
10
1
9
13
MI2
MI1
ME
91