Kenwood TK-3230 Service Manual page 29

F
TX-RX UNIT (X57-7330-10)
SB
3T MOD
TO
3C
VR300
47k
3R
3M
B
SPDET
QT/DQT_IN
3M
3T
AFO
C307
C308
R305
C303
R300 R476
15k 0
TO
MOD
3T
3C
3R
3M
B
G
SCHEMATIC DIAGRAM
R339
0
2.969V
SPAMP
R315
15k
C331
BEEP
0.047u
ACTIVE FILTER
IC301
NJM2100V-ZB
1 AoUTPUT 8
V+
2 A-INPUT 7 R319
BoUTPUT
3 A+INPUT 6 82k
B-INPUT
4 5
V-
B+INPUT
R310 R314
100k 56k
C320
R322
18k
10u
R:1.33V
R318
BASE BAND
100k
IC300
AK2346
1u 1 24
AGNDIN
TEST
1u 2 23 C316
AGND
RXIN
3 TXIN 22
220p
RXINo
270k 4 21
TXINo
RXLPFo 1.488V
9p 5 20
LIMLV
RXAF
6 19
EXTLIMIN
RXAFIN
C314
R307 7 MOD 18 R321
EXPOUT
0 8 17 3900p
22k
VSS
VDD
9 16
TCLK
XIN
10 TDATA 15
XOUT
11
14
D_IO
DIR
DIR
12 13
RDF_FC
SCLK
SCLK
DI/O
R492
22k
C431
R443
0.01u 1k
H
AUDIO POWER AMP
IC303
LM4865M-N
1
VDD Vo2
2
-Vin Bypass
3
SD GND
4
DC vol. Vo1
Q301
2SK1824-A
SPEAKER AMP
D308
SURGE
ABSORPTION
R336
22k
L407
3M
3T
AUDIO MUTE SW
Q300
2SK1824-A
1.485V
1.473V
R323 470k
C319 2700p
SW
D301
RB706F-40
C332
0.1u
AGC DETECT
AF DETECT
D302
RB706F-40
R342
1k
I
TK-3230
8 L300
C351
7
6 0.15u
5 L301
VR301
R31-0667-05
10k
D304
REVERSE
3.8V
PROTECTION
F300
F53-0324-05
L410
2.5A
R358
0
R360
0
R354
R352 100
R361
470 0
D306,307
VOLTAGE
PROTECTION
MIC AMP/LIMITER
IC302 C329
TK62012F
180p
1 8
AoUT VDD
2 7 R332
A-IN BoUT
R335 C333
3 6 68k
A+IN B-IN
4 5 1k 0.1u
VSS B+IN
C327 R333
6.8k
0.068u
MIC MUTE/AGC SW
D303
DAN222
R340
R346
4.7k
4.7k
MIC MUTE/AGC
Q302
2SK1824-A
SURGE
ABSORPTION
VOX SW
J
INT.SP
BATT
MIC300
INT.MIC
J300
PTT
MIC
IM
EXT.SP
SPG MIC
TXD
SPK
AFO
R338 C336
15k 0.1u
Q303
2SC4919
R356 330
R357 330
TO
MOD
3T
3C
3R
3M
B
29
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