Kenwood TKR-851 Service Manual page 68

A
TKR-851
TX-RX UNIT (X57-696X-XX) (B/2)
1
CN600
E40-6102-05
1
SB
SB
GND
NC
DAT
PSW
STB1
CLK
2
SOE
PTT/TXD1
K1
HK/RXD1
K2
K3
K4
K5
VLI
5C
MIG
MIC
20
3
CN602
E40-6009-05
36
NC
DET
NC
GND
ASQ
RSSI
SC
DP
CP
EPR
EPT
LDR
LDT
4
DT
CK
STB
FWD
LD2
BUP
PSW
TMP
SOE
GND
MB
MO
GND
GND
QS
5
NC
SB
SB
SB
SB
NC
8C
8C
1
14
GND
6
NC
PTO
RXI
CLRC
PTI
BC4
BC3
BC2
BC1
AC
RXO
TXI
TXO
1
CN601
E40-5701-05
7
56
X57-696 (B/2) 1/5
B
SCHEMATIC DIAGRAM
SURGE
PROTECTOR
D600
DA204U
R605
BATT
C600 100k
0.1u
DAT
PSW
STB1
CLK
SOE
TXD1
KEY1
RXD1
KEY2
KEY3
KEY4
KEY5
VLI
ASQ
RSSI
SC
CP600 1k*2
DP
CP
R607 0
ENR
R608 0
ENT
R609 0
LDR
R610 0
LDT BUP
CP601 1k*2
DAT
CLK
STB
R611 0
FWD TMP
LD2
R612 0
PSW
R613 0
SOE
AMPSW
AM
SOE
SHIFT
REGISTER
IC602
BU4094BCFV
STB
PTT CLK
R601
0
C D
Note : The components marked with
a dot (
R634
47k
Q601
DTC114EUA
DC SW
R633
47k
DC SW
Q602
2SK1824
E
•
) are parts of layer 1.
VOLTAGE
DETECTOR
IC601
RH5VL42C
5.02V
2
5.02V
1
VDD OUT
GND
3
CNVSS
RESET
DC SW
XOUT
Q600
2SK1824
R602
4.7k
C616
0.01u
EEP ROM
IC600
AT24C08A10SI18
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
SB
8C
GND
XIN
SFT
SCL
SDA
RXI
GND
MIC
DEI
5C
DATA
MB
MO
RXO
TXI
TXO