Kenwood TK-80 Service Manual page 26

D/A Converter: M62363FP (TX-RX unit IC13)
Pin No. Pin Name Port Name
1,2 NC
3 POC
4 (5V)
9 RAF
10 AFC
11 MICOUT
12 MICIN
13 (5V)
14 CAR
15 TGC
16 (5V)
21 (5V)
■ M62363FP Block diagram
V
V
Balanced Modulation: NJM2594V (TX-RX unit IC4)
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SEMICONDUCTOR DATA
VI1,VO1 Not used
VO2 Power control
VI2 Created from 14V at zener and resistive division
VI3 AF reference voltage
VO3 AF voltage (VCA control voltage)
VO4 Microphone output (audio), microphone gain
VI4 Microphone input (audio)
VI5 Vdd common
VO5 CAR level
VO6 TX gain control
VI6 Vdd common
VI7 Vdd common
8 V 8 V 7 V 7
IN OUT OUT IN
24 23 22 21
8 bit 8 bit
R-2R segment R-2R segment
D-A converter D-A converter
8 bit 8 bit
Latch Latch
8 bit 8 bit
Latch Latch
8 bit 8 bit
R-2R segment R-2R segment
D-A converter D-A converter
1 2 3 4
1 V 1 V 2 V 2
IN OUT OUT IN
Carrier Signal
NC input Bypass input
8 7 6 5
1 2 3 4
V+ Output Output GND
1 2
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Description
GND RESET V ref D
DA O
20 19 18 17
8
8
Adress
decoder
D0 ~ D7 D8~D11
12 bit shift register
5 6 7 8
V LD CLK DI
DD
TK-80
V 6 V 6 V 5 V 5
IN OUT OUT IN
16 15 14 13
8 bit 8 bit
R-2R segment R-2R segment
D-A converter D-A converter
8 bit 8 bit
Latch Latch
8 bit 8 bit
Latch Latch
8 bit 8 bit
R-2R segment R-2R segment
D-A converter D-A converter
9 10 11 12
V 3 V 3 V 4 V 4
IN OUT OUT IN
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