Kenwood NX-800 Service Manual page 133

P
TX-RX UNIT (X57-7752-71) (A/2)
BUFFER AMP
(RF)
Q10
2SC5636
1.79V
C82
TX
33p
1.19V
50C
50R
4.34V
C240 R245
RX
0.01u 100k
C246
0.01u
Q205
2SC3356(R23)
0.74V
1st
IF AMP
R209
50R
10
2
1
Q
SCHEMATIC DIAGRAM /
R : 2.14V
T : 4.26V
C86 R158 R160 R69
7p 0 0 0
4.80V
T/R
SW
R : 2.81V
T : 0V
L36
R261
4.7k
4.75V
1.76V
C267
R339 C344
7p
Q208
47 100p
2SC5636
1.20V
BUFFER AMP
(LOCAL)
XF202
58.05MHz
R250 R320 R256 R257
oUT IN
3 6
0 0 180 0
4.95V
1.39V
1.39V
C230
0.1u
oUT
BUFFER AMP
(2nd IF DET)
R
T/R R : 0V
SW T : 4.94V
D101
C101 R103 C104 R106
1000p 5.6 100p 220
HVC131
2SC5108(Y)F
0.87V
80T
L213 L214
22n 22n
C272 C275 R273
2p 2p 18
L211
R268
47
4.33V
L210
L39-1498-05
R321 R263 C262
0 0 0.01u
33A_2
R238
10k
CF203
450kHz
R229 C334
IN
2.2k 0.1u
C365
1000p
2
1
S
NX-800
原理图
RF
PRE-DRIVE AMP
C105 C109
100p 6p
RF DRIVE AMP
Q101
Q102
2SC5455-A
1.14V
0.15V 7.60V 0.52V
C280
470p
C270
470p
IC204
SPM5001
L215
1 6
R298 C279
G1 G2 L39-1498-05
0 470p
2 5
D1 S1
3 4
D2 S2
R300
0
1st
MIXER 0.93V
IC203
TC75W51FK(F)
5 4
VSS
6 3
2
7
8 1
VDD
3.29V
C366
BUFFER AMP
1000p
(RSSI/VAGC)
X57-775 (A/2) 4/16
T
C118
6p
TX
7.92V
RX
2
1
133