Kenwood NX-740H Service Manual page 19

Ref. No. Part Name
Q710 Transistor
Q711 Transistor
Q712 Transistor
Q713 Transistor
Q714, FET
Q715
Q716 Transistor
Q717 FET
Q718 Transistor
Q719 FET
Q720 Transistor
Q721 FET
Q722 Transistor
Q723 Transistor
D5 Variable
Capacitance Diode
D6 Variable
Capacitance Diode
D7 Variable
Capacitance Diode
D8 Variable
Capacitance Diode
D9 Variable
Capacitance Diode
D10 Variable
Capacitance Diode
D11 Variable
Capacitance Diode
D12 Variable
Capacitance Diode
D13 Variable
Capacitance Diode
D14 Variable
Capacitance Diode
D15 Variable
Capacitance Diode
D16, D17 Diode
D300 Zener Diode
D301 Diode
D304 Diode
D305, Diode
D306
D307, Diode
D308
D309, Diode
D310
D500 Diode
D502~ Variable
D505 Capacitance Diode
D700~ Diode
D702
Description
9T switch
5C control switch
Overvoltage detect
Overvoltage detect
Speaker mute switch
5C switch
33BA switch
SB control switch
SB switch
AF amp switch
5MS switch
5MS control switch
33BA control switch
TX VCO tune
TX VCO tune
RX VCO tune
RX VCO tune
TX VCO tune
TX VCO tune
TX VCO tune
RX VCO tune
RX VCO tune
RX VCO tune
Modulation Control (TX VCO)
TX/RX band switch
Voltage Protection
TX power control
Reverse power rectifier
ANT switch
Power rectifier
ANT switch
Squelch voltage rectifier
RF BPF tuning
Surge protection
Ref. No. Part Name
D704~ Diode
D711
D712, Diode
D713
D714, Diode
D715
D717 Zener Diode
D718 Diode
D719 Surge Absorber
D720 Diode
D721 Diode
2.7 TERMINAL FUNCTION
2.7.1 Display unit (X54-3890-20)
Pin Name I/O
No.
1 POWER O
2 MKEY I/O MIC data detection
3 PTT/TXD I/O PTT/PC serial data
4 HOOK/RXD I/O HOOK/PC serial data
5 ME -
6 MIC O
7 GND -
8 NC -
9 LELH I
10 LECL I
11 LECE I
12 LEDI I
13 5C I
14 KMI3 O
15 KMI2 O
16 KMI1 O
17 KMO3 I
18 KMO2 I
19 KMO1 I
20 BLED I
21 GLED I
22 RLED I
23 MBL I
24 LEDM I
25 SP- I
26 SP- I
27 SP+ I
28 SP+ I
29 SB I
30 SB I
Description
Surge protection
MIC AGC detection
RXD2 level shifter
Voltage Protection
5M stabalize
Voltage Protection
PTT
Hook
Function
CN1
Detection output of power switch
MIC ground
MIC signal output
Ground
-
LED latch input
LED clock input
LED enable input
LED data input
5V DC power supply
Key matrix output 3
Key matrix output 2
Key matrix output 1
Key matrix input 3
Key matrix input 2
Key matrix input 1
Blue LED control signal input
Green LED control signal input
Red LED control signal input
MIC backlight control signal
input
LED dimmer input
Speaker input -
Speaker input -
Speaker input +
Speaker input +
Battery voltage DC supply
Battery voltage DC supply
(No.RA010<Rev.001>)1-19