Tx-Rx Unit (X57-7000-Xx)(A/4) - Kenwood TK-2170 Service Manual

AE
TK-2170

TX-RX UNIT (X57-7000-XX)(A/4)

R923
B
0
F901
F53-0324-05
L901
BATT
2.5A
VOLTAGE
LIMITER
BATT
CN901
E40-6420-05
1
GND
C926 1000p
2
RX
C925 1000p
3
TX
C924 1000p
4
MOD
5
TCXO
6
5MS
7
UL
8
PCLK
9
PDAT
10
PLE
11
THM
C916 1000p
12
BPF
13
ASQL
14
RSSI
15
DETAF
16
WIDE
17
NARROW
18
5R
19
5C
20
5C
21
5T
22
5T
23
APCSW
1000p
C906
24
DSW
25
PC
26
GND
62
X57-700 (A/4) 1/2
AF
SCHEMATIC DIAGRAM
C576
15p
RX LOCAL SW
R913 470
R912 100
R903 470
R902 470
R901 470
4.9V
R506
150k
C516
1u
C517
0.01u
10 16
DGND DVDD
17
9
DGND DVDD
PLL SYSTEM
8 18
REFin IC501
VP
7 19
ADF4111BCP7
AVDD Rset
R503 6 20
AVDD CP
10
L501
R507
4.7u
47
C515
1000p
AG
TX RF SW
D518
HSC277
LOCAL AMP
Q507
2.1V
2SC5488
D517 C581
HSC277 1000p
1.4V
XF701
L71-0617-25
49.95MHz
C728 R727 R728 C732
680
0.01u 470 0.01u
L502
C522 C533
10n
470p 5p
C529
2p
D502
C530
8p(B) HSC277
D502,503,512
F-IN FILTER
SHIFT SW
FAST
CV
LOCK UP
D504-507
DIODE
D501 FREQUENCY
CONTROL
HSC277 TX VCO
L503
L505
R511 R512 R515 R516
10u
0 0 1k 470
D508-511
FREQUENCY
L506
CONTROL
18u
RX VCO
AH
PRE-DRIVE AMP
Q602
2SK3077F
C601 R602 C611
1000p 0 47p
C579
10p
T:0.9V(Hi)
0.75V(Lo)
R:0V
T:2.5V(Hi)
2.1V(Lo)
R:0V
T:5V
R:0V
L706 L708
56n 56n
C738 C741
2p(B) 3p(B)
L707
T:0V
270n BPF C744
R:4.8V
R731 1p
MIXER
2.2k Q704
T:0V
3SK318 T:0V
C739
C746
R:1V
R:3.2V
1000p
12p
R523
22
C538 C550
5p
470p
4.9V
Q501
2SC5488
F-IN
DOUBLER
T:5V
R:0V
D513
TX VCO
D506 TX VCO
MODULATOR OSCILLATOR
1SV325F
Q502
D507 C541 2SK508NV(K52)
56p
1SV325F
C542 R522 R525
270k
1u 180k
D510
RX VCO
OSCILLATOR
1SV325F
Q503
D511 C548
2SK508NV(K52)
30p
1SV325F
AI
APC
5T
B
DSW
APCSW
PC
5R
T:0V
R:3.2V
BPF
WIDE
NARROW
RSSI
ASQL
5R
5C
0.9V
C575
4p
R531
22
C566
0.5p(B)
R532
22
C567
0.5p(B)
RX
TX
2nd_Lo