Kenwood NX-3400, Service Manual

Page: 21 / 98

(No.RA070<Rev.001>)1-21
2.5.2 DISPLAY unit (XC1-209K-02 A/2)
CN625
1 SMIC I External MIC input
2 RXD/USB_DM I/O Serial data input / USB DM
3 TXD/USB_DP I/O Serial data output / USB DP
4 5U O 5V power supply output
5 GND - GND
6 OPT I MIC identification
7 PF I Programmable function key input
8 PTT I PTT input
9 ME - MIC GND
10 EMC/VBUS I External MIC input / USB VBUS
11 MSW I Ext/Int MIC switch Input
12 SP- O BTL output for external speaker -
13 SP+ O BTL output for external s
14 SSW I Ext/Int speaker switch input
Pin No. Name I/O Function
CN201
1 NC - No connection
2 K- - Cathode for backlight(GND)
3 A+ O Anode for backlight
4 VSS - GND
5 DB7 I/O LCD Data Bus 7
6 DB6 I/O LCD Data Bus 6
7 DB5 I/O LCD Data Bus 5
8 DB4 I/O LCD Data Bus 4
9 DB3 I/O LCD Data Bus 3
10 DB2 I/O LCD Data Bus 2
11 DB1 I/O LCD Data Bus 1
12 DB0 I/O LCD Data Bus 0
13 /RST O LCD reset signal
14 R/W O LCD write signal
15 E O LCD read signal
16 A0 O Data/Command control signal
17 /CS0 O LCD CS signal
18 VSS - GND
19 VDDI O LCD I/O Power Supply(DC 1.8V
output)
20 VDDA O LCD Analog Power Supply
(DC 3.2V output)
21 VB0+ - LCD bias voltage. Connect to VB0-
via a capacitor.
22 VB1+ - LCD bias voltage. Connect to VB1-
via a capacitor.
23 VB1- - LCD bias voltage. Connect to VB1+
via a capacitor.
Pin No. Name I/O Function
24 VB0- - LCD bias voltage. Connect to VB0+
via a capacitor.
25 VLCD O Main LCD power supply
CN202
1 GND - GND
2 GND - GND
3 LBC_B O Light Bar Blue Control
4 LBC_R O Light Bar Red Control
5 LBC_G O Light Bar Green Control
6 LED_R O LED Blue control
7 LED_B O LED Red control
8 LED_G O LED Green control
9 KEYo0 O Key matrix output
10 KEYo1 O Key matrix output
11 KEYo2 O Key matrix output
12 KEYo3 O Key matrix output
13 KEYI0 I Key matrix input
14 KEYI1 I Key matrix input
15 KEYI2 I Key matrix input
16 KEYI3 I Key matrix input
17 KEYI4 I Key matrix input
18 50A O DC 5.0V output
19 50A O DC 5.0V output
20 MIC I Main MIC input
21 ME - MIC GND
22 GND - GND
23 GND - GND
24 LCD_BLC O LCD backlight control
25 LCD_DB7 I/O LCD Data Bus 7
26 LCD_DB6 I/O LCD Data Bus 6
27 LCD_DB5 I/O LCD Data Bus 5
28 LCD_DB4 I/O LCD Data Bus 4
29 LCD_DB3 I/O LCD Data Bus 3
30 LCD_DB2 I/O LCD Data Bus 2
31 LCD_DB1 I/O LCD Data Bus 1
32 LCD_DB0 I/O LCD Data Bus 0
33 LCD_RST O LCD reset signal
34 LCD_R/W(WR0) O LCD write signal
35 LCD_E (WR1) O LCD read signal
36 LCD_A0 O Data/Command control signal
37 LCD_/CS O LCD CS signal
38 LCD_VSS - GND
39 18M O DC 1.8V output
40 32LCD O DC 3.2V output
41 32LCD O DC 3.2V output
Pin No. Name I/O Function