Kenwood TKR-D710 Service Manual page 97

F
TX-RX UNIT (X57-894K-01)
DC SW
Q500
SSM6L05FU-F
50C
INT Ref:0V
EXT Ref:4.94V
INT Ref:0V
EXT Ref:2.81V
C500 C501 R503
0.1u 0.1u 100
LIMITER
LIMITER
INT Ref:0V
EXT Ref:2.16V
50C
33C
OSC
X500
L77-3034-05
1
VC VCC
2
GND oUTPUT
10MHz-->
CN810
33A
/EWP
R833 100
R834 100
SPSCLK1
R835 100
SPSD1
/IOCS
/EVCS
DIGITAL
POTENTIOMETER
IC804
M62364FP-F
EVOL
MOD -->
AGC
ASWC
FAN
PLIM
<-- 450kHz
G
SCHEMATIC DIAGRAM
50ER
INT Ref:0V
EXT Ref:5.04V
C503 C510 1
0.1u 0.1u 2
3
4
C511
0.1u
RF AMP
Q501
2SC4617(R)
C512
0.1u
R510
RF AMP
22k Q503
3SK294-FP
C507 C509
0.1u 0.1u
10MHz AMP
3.25V
3.25V
C504
1000p
LPF
AMP
4 C505
L501
C517
0V
0.1u
0.01u 4.7u
3 C508 Q502
2SK3737-5
0.01u
RF AMP
0.68V
RSSIOFS -->
R841
100
R838
100
R837
3.28V
0
VT2 -->
VT1 -->
3.28V
R855
0
CN814
MB -->
MO -->
1.64V
H
R524
100k
3
BUFFER AMP
2
IC500
C532
TC75W51FK(F)
1
8 0.1u
oUTA VDD
7 R528
DETECTOR
IN-A oUTB
6 220k
D503
IN+A IN-B
HSM88AS-E
5
VSS IN+B
C534
5p
C525 C528
47p 120p
L502 L503
C522
100p 680n 560n
INT Ref:0V
EXT Ref:G1:2.47V G2:2.27V
D:4.92V S:0.87V
LPF
4.90V
2.30V
RF AMP
R525 C530 R530
Q504
2SC4617(R)
0 0.1u 470
3.28V
R845
100k
R844
100k
1 15
So GP6
2 14
I/O EXPANDER
A1 GP5
3 IC805 13
A0 MCP23S08TE/ML GP4
4 12
RESET GP3
R840 5 11
CS GP2
100
W_/N
VN_/N
VT2 -->
VT1 -->
I
TKR-D710
50ER
C541 0.1u
OP AMP
IC501 DC SW
C542 10u
TC75S59F-F
Q507
4 UPA672T-A
IN+ oUT
VSS
5
IN- VDD
R539
100k
R544
R536
100k
2.7k
Q505
SSM3K15TE(F)
DC SW
C544
0.1u
INT Ref:5.07V
DC SW
EXT Ref:0.15V
Q506
SSM6L05FU-F L507
R541
100 33u
R547
1.8k
R548
L505
1.8k
1.2u
C537
0.1u
L506
R549
1.2u
1.8k
1.64V
R550
1.8k
8TC
RXC
MB -->
MO -->
ASWC
FAN
J
C549
0.1u
RF SW
D504
JDP4P02AT
RF SW
D505
JDP4P02AT
1dB ATT
1dB ATT
MB -->
MO -->
RSSIOFS -->
AGC
W_/N
VN_/N
<-- 450kHz
19.2MHz -->
19.2MHz -->
VT2 -->
VT1 -->
97
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