Kenwood NX-320 Series Service Manual page 95

AJ
TX-RX UNIT (X57-8050-XX)
50CS
Fin
+B
7.49V L 40 5 C4 40
R 4 2 8 *
22 0n
0
*
RX VCO TUNE
R 4 2 9 L4 04 C441
* *
1SV282F
0
TX VCO
TUNE
L429
50CS
CPout
CV
R 41 7 R 419
0 3 9 0
BYPASS
APC
OSC
50T
50R
33A
5
F 2
1A
+B2
F53-0319-15
50V SW CONT
D902
D9 0 1
REVERSE
CURRENT
PROTECT
D A N 2 22
TXD0
D 901
PTT/RXD
50CS
MICI
1 S S 4 1 6
OPTDET
PTT2
EXTMICSW
Q 9 0 6
R T 1 N 1 4 1 U - T1 11
EXT/MIC SW
R:7.49V
T:7.29V
C9 03
R 90 1
SPAF
1 0k
1 u
R T1 N14 1U- T11 1
Q9 01
AFSW
6
R:3.29V
T:0V
X57-8050-XX L407 L409 L411 L413
L404
K,K2,K3 180n 180n
-10
-11 K4,K5,K6,E,E2,E3 220n 220n
AK
SCHEMATIC DIAGRAM
RX VCO
D402,405,408,409
Q4 01
ASSIST TUNE
*
MCH3914(8)-H
D409
D408
C 446 * L4 16
1SV282F
1SV282F 180 p
R:4.07V
T:0V
TX VCO
Q402
R:0V
MCH3914(8)-H
T:3.98V
C4 47
D406
D4 07 L415
* *
1SV282F
D406,407,411,415
TX MOD
ASSIST TUNE
R 4 4 1
2SC 5383- T 11 1
SPEED
R:4.87V
UP
T:4.84V
A VR (50V)
DC SW
IC901
(AF PA AMP)
1 NC 1
Q902
PoUT
10
2SA1362-F(GR)
2 V CC
PW- GN D
9
3 N C2
PRE- GND
8
R:7.45V
4 V IN
T:0.27V
PHASE
7
5 R IPPLE
NF
6
TA7 368F G
AF POWER AMP
C906
DC SW(AF MUTE)
L415 L416 L419 L422 L427
180n 180n 180n 15n 18n 180n 27n 180n
220n 220n 220n 18n 22n 220n 33n
220n
AL
L42 6
R 44 6
220n
22
C 455
C 466
0.5p
R:1.25V
T:0V
L4 27
R 4 47
* *
R:0.75V
T:0.72V
C458
*
C 467
0. 5p
R:0V
T:1.15V
R:0V
T:4.14V
Q406
R:4.18V
SSM 6L0 5F U - F
T:0V
47 0k
T/R VCO SW
R 4 4 8
R:3.30V
470k
T:0V
Q403
R:4.20V
T:4.16V
RIPPLE FIL
50V
Q 9 0 7
LEVELE CONV
U P A 672T -A
Q90 4,905
R 905
AF POWER MUTE
4 7 0 k
Q9 05
Q 904
2 SK 3577 -A 2S K 3577- A
C 9 0 8
100 p
DC SW(AF MUTE)
Q90 3
RT 1N441 U -T 111
0.1u
R436 R443 R447 R472 C440 C441 C447 C455 C457 C458 C462 C463
100k 180 10 33 120p 120p 120p 6p
82k 220 22 0 330p 470p 270p 8p
AM
NX-320
C 457
*
L4 21
C 471
R 472
*
*
12 n
R:3.85V
T:3.82V T:3.82V
C 473
R 451
1 5 0 k 5 p
Q 4 0 5
2S C 5108(Y ) F
BUFFER AMP
T/R VCO SW
Q 407
S S M3 J05F U -F
BUFFER AMP
Q 408
2S C 5636
* C 477
R:1.30V
T:1.30V
R:1.80V
T:1.80V
R912 680
PTT/RXD
MICI
MICO
R 91 1
OPTDET
50V
27k
R 91 3
TXD
SPI
C 914
100
SPO
100u
6 . 3
C N4
L 9 0 4
L905
L902
L903
C477 C498 C499
C471
5p 4p 2p 18p 5p 0.75p NO
3p
4p 6p 8p 5p 10p 470p 1p 1p
X57-805 6/8, X54-376 (C/3) 1/1
AN
+B
50CS
C475
10p
C 480
0.1u
C 481
470p
R:4.78V
T:4.78V
C 482 7 u
/T_R
APC
OSC
50T
50R
33A
5
J 1
E X T
MIC
J 2
AE
E X T
SP
MIC SECTION
(X54-3760-XX)(C/3)
MIC1
1
T91-0673-05
2
A
3
I NT
4
SP
95