Kenwood TKR-750 Service Manual page 93

P
TX-RX UNIT (X57-695X-XX) (B/2)
SB
8C
1.82V
1.8C
3.32V
3.3D
3.34V
3.3A
R690
47k
DEI DEO
C643
R654 R668
DET
0 18k
10u10
R680
22k
C662
R678
10u10
100k
R707
22k
R653 0
MULTIPLEXER
IC605
BU4053BCF
1
Y1 VDD
Y0
Z1
Z
Z0
INH
VEE
VSS
8
C642
0.01u
5TONE
RXI
GND
MIC
DEI
5C
DATA
MB
MO
RXO
TXI
TXO
BEEP
Q
SCHEMATIC DIAGRAM
IC624
XC62FP1802P
5.06V
1.8V AVR
3 2
VOUT VIN
1
IC625
3.3V AVR
XC62FP3302P
5.02V
3 2
VOUT VIN
1
IC626
3.3V AVR
XC62FP3302P
5.04V
3 2
VOUT VIN
1
IC624-628,630
VOLTAGE REGULATOR
C647 100p
R673 220k
TH701
R844
330k -t
10k
AF AMP
IC608
TA75S01F
C697
10u10
3 4
IN(-) OUT
C698
2
VEE
1 5 10u10
IN(+) VCC
C648 0.01u
C685 0.01u
IC610
AF AMP
TA75S01F
1 5
IN(+) VCC
2
VEE
3 4
IN(-) OUT
C684 100p
R736
R683 120k
R717 47k
C726
R718 47k
180p C736
C724
1800p
1800p
R722
AF AMP AF AMP
330k
C725
47p
R672
100k
16
Y
X
X1
X0
A TDS
B MIS
C TAS
R674
9
C649
IC607
AF AMP
R
5V AVR
IC627
TA78L05F
8.00V
1 3
OUT IN
2
IC628
TA78L05F
5V AVR
1 3
OUT IN
2
IC630
TA78L05F
5V AVR
1 3
OUT IN
2
CODEC
IC614
AK4550VT
16
1
VCOM AOUTR
AINR AOUTL
AINL PWDA
VSS PWAD
VDD SCLK
SCLK
DEMO MCLK MCLK
DEM1 LRCK
LRCK
SDTO SDTI
SDTI
8 9
SDTO
47k
C739
R737
C744
180p
47k
10u10
R738
270k
C740
100p
C679
10u10
R684 47k C690
100p
R842 0 R685 100k
R686
C652 100p
100k
R676 82k
AF AMP
82k
33p
C681
68u6.3
S
TKR-750
AMPSW
1 5
AM INB VCC
2
SPM INA
3 4
GND OUTX
INVERTER
IC621
TC7S00FU
NAND GATE
Q605
R745
DTC114EUA
47k
4 3
CONT GND
2
OUT/IN
5 1
R744
VCC IN/OUT
39k
IC622
TC7S66FU
MULTIPLEXER
RS232C
TRANSCEIVER
IC620
ADM202EARN
9 8
RXD0 R2OUT R2IN
TXD0 T2IN T2OUT
C777
T1IN V-
C775
1u25
C763
R1OUT C2-
1000p
1u25
R1IN C2+
C776
T1OUT C1-
C761 C779
1u25
GND V+
0.1u
1u25
VCC C1+
16 1
C722
C729
R713 R719
150k
27k
10u10 10u10
TH700
R843
-t
270k
10k
C821
R714
22k
100p
AF AMP
IC617
NJM4558E
R709 R721
22k 22k
C822
100p
R715 C723
1u
10k
D/A CONVERTER
IC615
M62364FP
12
13
VIN5 VIN4
MO
VOUT5 VOUT4
VOUT6 VOUT3
MB
VIN6 VIN3
R812
DO DI DAT
22k
VDAref CLK CLK
RESET LD LD1
GND VDD
VIN7 VIN2
TA RD
C701
10u10
VOUT7 VOUT2
VOUT8 VOUT1
TD RA
R841 0
VIN8 VIN1
24 1
C715 0.01u
X57-695 (B/2) 4/5
T
SB
AMPSW
RXD2
DXD2
RD1
GND
RA1
TD1
5C
DATA
TAI
GND
81