Kenwood TK-5310 K4 Service Manual page 80

K
TK-5310
TX-RX UNIT :TX-RX SECTION(X57-7250-XX)(A/5)
CV
POWER
CPU
Q450,451
DETECTION
AUTO GAIN CONTROL
D450
RB706F-40
R454
C460
10k
Q450 0.1u
2SC4738(GR)F
D451
RB706F-40
R455
C461
22k
Q451 0.1u
2SA1832(GR)F
DETECTION
Q454,456
TX SCRAMBLER SW
Q454
C457 R465 2SJ347F
4.7k
1u
Q456
SSM3K15TE(F)
IC452
OP AMP
(TX AGC AMP/
BUFFER AMP)
IC452
TC75W51FK(F)
1
C450 R451 2
22k
1u 3
4
MIC AMP
(with AGC)
IC451
OP AMP
(5V REFERENCE/
BUFFER AMP)
IC451
TC75W51FK(F)
1
2
3
4
CPU
POWER
R468
33k
R471
33A
R452 C453
R463
2.2k
22k 0.1u
SW(VGS TX I/O)
IC450
TC7W66FK-F
1 IN_oUT1
2 oUT_IN1
R453
3 CoNT2
33A
470k 4 GND
VATS
R459
Q453
10k
SSM3K15TE(F)
VGS I/O SW
MIC MUTE
C458 R464
1u 22k
MIC MUTE SW
Q452
SSM3K15TE(F)
MM
5M
33M
EMC
MICE
CTS
SP+
SP-
X57-725 3/12
L
SCHEMATIC DIAGRAM
R524
47k
R525
180k
R487
47k
R478
220k
C476
1u
8 R484
R493
47
7 4.7
6
5
8
7 C477 R495
6 0.1u 220k
Q460
5
2SC4617(S)
NOISE AMP
C471
150p
C465
10
0.1u
8
VCC
7
CoNT1
6
oUT_IN2
C464 R473
5
Ao
IN_oUT2
0.1u 0
AI_TX
EXT MIC SW
Q455
2SJ347F
BEET SHIFT SW
Q459
SSM3K15TE(F)
EXT MIC SW
Q457
SSM3K15TE(F)
R470
470k
M
OP AMP
(TX LPF/RX LPF)
IC456
TC75W51FK(F)
5 4
6 3
7 2
8 1
IC454
CODEC
AK4550VTP
1 16
VCoM
AoUTR
2 15 C504
AINR
AoUTL
3 14 1u
AINL
PWDA
4 13
VSS
PWAD
5 12
VDD
SCLK
6 11
DEM0
MCLK
7 10
DEM1
LRCK
8 9
SDTo
SDTI
D
R553
39k
REVERSE
CURRENT
PREVENTION
D453
RB706F-40
C488
0.22u
DETECTION
R488 C474
10k 0.1u
X450
L77-1962-05
1 VCoNT 4
VCC
2 GND 3
oUTPUT
D-TYPE FLIP FLOP
D
D IC453
TC7WH74FK-F
1 8
CK VCC
2 7 D
D PR
3 6
Q CLR R502
4 5
GND Q
D 10
C480
0.01u
D
N
SW
(RX SCRAMBLER SW
/BEEP SW)
IC458
TC7W66FK-F
R545
1 IN_oUT1 8
VCC
2 oUT_IN1 7
47k
CoNT1
3 CoNT2 6
oUT_IN2
4 GND 5
R546
IN_oUT2
120k
R550 1M
R538
47k
OP AMP
(TX BUFFER AMP/
RX BUFFER AMP)
IC459
TC75W51FK(F)
1 8
2 7
3 6
4 5
BUFF AMP
(MOD)
R507 10
R519
R510 470k
CPUCLK
47
BUFFER
IC455
TC7WU04FK-F
R505
1 8
1A VCC
2 7
10 3Y 1Y
3 6
R506 2A 3A
4 5
GND 2Y
10
D D
R511 R517
DSPCLK
470k 47
R492
10
BSFT
O
CV
POWER
CPU
OPTION
R564
1M
R563 C505
120k 10u
CPU
POWER
DSP-FPGA
OPTION
MICE
MIC
SP+
SP-