Kenwood TK-80 Service Manual page 124

A
24mVrms
CN1
AF
AFG
TX-RX
-CN13
MIC
MICG
Note : The components marked with a dot (
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B
SELECTIVE CALL UNIT (KPE-1) (OPTION) (X52-3300-20)
L1
18u
C1
0.1u
L3
1 AF
18u
AFG
MIC
4 MICG
TP1
R2
4.7k
0V
C10 R14
0.01u 47k
5.0Vp-p
X1
3.5795MHz
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C
KPE-1 (SCHEMATIC DIAGRAM)
FSK DEMODULATOR
IC1
5.0V
NJM2211M
1
SIGNAL
PRE AMP
VCC
2
3
QUAD LOOP
DET DET
4
LOCK
DETECTOR
INTERNAL
5 COMPARATOR
REFERENCE
6
7
FSK
COMPARATOR
S1
TEST TEST
USE USE
R3 R4 R5
4.7k 470k 39k
BUFFER
IC2
5.0V SN74ALS04BNS
1 14
VDD
13
2
0V
3
12
0V
4 11
4.4V
5
10
6 9
3.6V
8
7
GND
DTMF DECODER
IC3 5.0V
LC7385M
18
1
VDD
IN+
2 17
IN- ST
R15
3 16
GS EST
680k
4 15
VREF STD
5 14
B/H Q4
6 13
PD Q3
7 12
X1 Q2
8 11
X2 Q1
9 10
GND TOE
• ) are parts of layer 1.
D
14
13
12
11
10
1.8V
9
8
5.0V
0V
D4-6
LED
4.4V MARK 5.0V
D4
R11
B30-2004-05 470
SPACE
0.2V 2.1V
D5
R12
B30-2004-05 470
LOCK
0.2V 2.1V
D6
R13
B30-2004-05 470
0V
DGND
3.6V
FSL
0V
FSD
5.0V
5A
R16
0V
DGND
330k
STD
5.3V
Q4
5.3V
Q3
5.3V
Q2
5.3V
Q1
0V
TOE
0V
DGND
E
TK-80
1
2
3
4
5
CN2
12
DGND
FSL
FSD
5A
DGND
STD
CONTROL
-CN2
Q4
6
Q3
Q2
Q1
TOE
DGND
1
7
107
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