Kenwood TK-3230 Service Manual page 30

K
TK-3230
SHIELD CASE (VCO)
LV
L4
33n
L2
L15
220n
FREQUENCY
CONTROL
R:2.843V
T:0.833V
R6
1k
CURRENT
STEERING
R7
R:2.823V
47k
T:0.08V
Q1
2SK1824-A
DC SW (T/R)
3C
3T
R3 R8
1k 100
L1 R4
3C
10
C7 100p
C8 100p
C9 100p
PEN
PDATA
PCLK
UNLOCK DETECT
UL
3C
R474
0
TO
MOD
3T
3C
3R
3M
B
30
X57-733 3/4
L
SCHEMATIC DI A GRAM
D4
1.576V
TX MODULATION
C14 C27
4p 13p
Q2
VCO
2SC5488
L6
R17
1.0u
56k
2.837V 3C
R:0.117V
T:1.764V
3C
C50 C51
3p 3p
L14
L13 C35
R10
0 12n 12n
10p
IC1
TB31202FNG
1 16
FIN1 FIN2
2 15
VCC1 VCC2
3 14
CP1 CP2
13
4
GND1 GND2
5 12
R13 0
LD SW
C23
6 11 R24
R14 100
CK XIN
7 10
0.01u 0
R15 100
DATA XoUT
2.792V
8 9
R16 100
STB BUF
PHASE LOCKED
LOOP SYSTEM
VCXO
12.8MHz
X1
L7
C30 R44
L77-3019-05
10u
470
0.01u
R43
10k
M
R29
R:0.36V
T:0.33V
33k
RF BUFFER AMP
1.6V
Q5
C459
2SC5066-F(O)
C33
5p
0.5p
0.765V
0.38V
RIPPLE FILTER
Q4
2SC4617(S)
1.934V
2.626V
CURRENT
STEERING
3M
2.842V
R30
0.74V 3R
100k
Q3
2SC5488
RF AMP
C34
R26
0
10p
R202
3.3k
R200 R205
1.2k 3.3k
R:2.833V
3R
3M
B
N
TX-RX UNIT (X57-7330-10)
1.365V
RF AMP
R:0.783V
L409
C44 C48
Q6
T:0.77V
2SC5066-F(O)
3.3n
5p 470p
C43
10p
R40
10k
3C
2nd IF
450kHz
CF200
C207
0.1u
R:2.837V
C206
R:2.478V
270p R:1.588V
C215
0.01u
IF SYSTEM
IC200
TA31136FNG
R:2.882V
C216
0.01u
R:0.938V
R:2.835V
R207
3.3k
Q200
KRA304E
RX W/N SW
O
3M
3T
3R
R:0.697V
IF AMP
Q201
2SC4082
3R
B