Kenwood TK-2180 Service Manual page 62

Z
TX-RX UNIT (X57-6932-71)
MOD
5T
DSW
APCSW
D10
1SV323
L9
10u
D11
1SV323
R:0V
D5,7,10,11
T:0.17V
FREQUENCY
CONTROL /
TX VCO
R26
0 4.7u
D9,13
FREQUENCY
CONTROL /
RX VCO
D13
L10
10u
1SV325
TMP
T/R
5C
R:4.75V
T:0.18V
5R
R:4.75V
T:0.17V
XF200
R235
59.85MHz
10
L71-0622-05
L220
C232
R232
560n
0.01u 220
R234
47
SPOUT
MIC
5CNS
TV
APC/TV2
B
RXD
TXD
RXD1
CPU_DGND
5M
AA
SCHEMATIC DIAGRAM
VCO TX
Q7
C37
2SK508NV(K52)
82p R:0V
T:1.15V
MODULATOR
C34 R30
R27 R35
270k
0 47k
R:0V
T:0.17V
VCO RX
Q6
C39
2SK508NV(K52)
33p
R:4.36V
T:0.17V
R:2.30V
T:0.17V
Q206
3SK318
MIXER
R:2.36V
R:0.48V
T:0.17V
R236
T:0.17V
680
AB
R39
22
RF BUFFER AMP
Q10
C62
2SC5108(Y)
C53
33p
0.5p(B)
DC SW / TX VCO
Q8
R:0V
2SJ347
T:4.33V
R:4.19V
DC SW / RX VCO
T:0.18V
Q9
R38 2SJ347
22
Q12
2SK1830
DC SW / RX VCO
RIPPLE FILTER
C54
Q11
2SC4617(S)
0.5p(B)
CURRENT
STEERING
T/R(H:Rx,L:Tx)
D207,208
RF BPF TUNING
C255 C260
R243
C250
2p(B)
1000p 0 4p(B)
AC
TK-2180
R:2.03V
RF AMP
T:2.28V
Q13
C68
2SC5108(Y)
C64
10p
15p
L21
TX/RX
R:0V
RF SW
T:4.21V
R:4.88V
L206
T:0.19V
39n
R:2.76V
C240
T:0.18V
2p(B)
R:4.38V
T:0.18V
R:4.71V
R:2.60V
T:0.17V
R248
T:0.17V
68
R264
Q207
RF AMP
3SK294
R255
100k
AD
5T
DSW
APCSW
TMP
TX/RX RF SW
D100
HSC277
L207
39n
C244
1.5p(B)
C275 R265
0
4.5p(B) 0
SPOUT
MIC
5CNS
APC/TV2
B
RXD
TXD
RXD1
CPU_DGND
5M
57
X57-693 6/8