Kenwood NX-3720HG Service Manual page 24

Ref. No. Part Name
D205-209 Diode
D301-304 Diode
D401 Diode
D402-406 Diode
D407 Zener diode
D408-410 Diode
D601 Zener diode
D602 Diode
D603-608 Zener diode
D609,610 Diode
D611 Zener diode
D612,613 Diode
D614,615 Diode
D616,617 Diode
D618 Diode
D619 Diode
2.5.2 SUB unit (XC3-050M-00)
Ref. No. Part Name
IC1 IC
IC3,4 IC
IC5 IC
IC6 IC
Q1 FET
Q2 FET
Q3,4,6 Transistor
Q8 FET
D1,2 Diode
D3-6 LED
D9,10 LED
D11,12 LED
D15,16 LED
D17,18 LED
D20 LED
D21 Zener diode
D22 Diode
D24 Zener diode
D26 Zener diode
D27 Diode
D28 Zener diode
D30 Zener diode
D32 Zener diode
D33,34 LED
1-24 (No.RA054<Rev.001>)
Use / Function
Antenna switch
Excessive input protection
Reverse current prevention
Line protection
Over voltage protection
Reverse current prevention
Over voltage protection
Reverse current prevention
Line protection
Line protection
Over voltage protection
Line protection
Reverse current prevention
Surge protection
Over voltage protection
Reverse current prevention
Use / Function
Voltage regulator (50M)
Level conversion
Bus switch
I/O expander
DC switch
DC switch (KEY Illumination)
DC switch (TX/BUSY)
DC switch (LCD backlight)
Surge protection
KEY Illumination
LCD backlight
KEY Illumination
LCD backlight
KEY Illumination
TX/BUSY LED
Over voltage protection
Reverse current protection
Over voltage protection
Over voltage protection
Over current protection
Over voltage protection
Over voltage protection
Over voltage protection
KEY Illumination
2.5.3 Module(BT/GPS) unit (XC2-0040-10)
Ref. No. Part Name
IC1 IC
IC2 IC
IC3 IC
IC4 IC
IC5 IC
IC6,7 IC
Q1 FET
D17,18 Diode
2.6 TERMINAL FUNCTION
2.6.1 TX-RX unit (XC1-182K-00,XC1-183K-XX)
Pin No. Name I/O
1 GND
2 GND
3 GND
4 NC
5 SP+ O Speaker output
6 SP+ O Speaker output
7 SP+ O Speaker output
8 NC
9 GND
10 GND
11 GND
12 GND
13 IGN
14 SB1 O Switched power supply
15 SB1 O Switched power supply
16 SB1 O Switched power supply
17 SB1 O Switched power supply
18 NC
19 54M O 5.4V output
20 NC
21 32M O 3.2V output
22 NC
23 18M O 1.8V output
24 NC
25 GND
26 USB_D+ I/O USB0 PHY data plus
27 GND
28 USB_D- I/O USB0 PHY data minus
29 GND
30 NC
31 MIC/VBUS
Use / Function
Level conversion
Voltage regulator (18BT)
Voltage regulator (33BT)
Voltage regulator (33GPS)
GPS/Bluetooth
Level conversion
DC switch
Over voltage protection
Function
CN1
- Ground
- Ground
- Ground
- No connection
- No connection
- Ground
- Ground
- Ground
- Ground
- Ignition sense input
- No connection
- No connection
- No connection
- No connection
- Ground
- Ground
- Ground
- No connection
I MIC signal input / USB VBUS
Detection