Terminal Function; Display Unit (X54-3760-Xx A/3); Display Unit (X54-3760-Xx B/3) - Kenwood NX-320 Series Service Manual

NX-320

Display unit (X54-3760-XX A/3)

Pin No. Name I/O
1 33M I
2 SCK0 I
3 SDI0 I
4 SDO0 O
5 DISP_VER O
6 /EVCS I
7 /LCDCS I
8 GND -
9 RXAF_2 I
10 ASQ O
11 ASQAPC I
12 VOX O
13 MIC O
14 50C I
15 MOD I
16 GND -
17 VCO_MOD O
18 33A I
19 TV2 O
20 TV1 O
21 SPAF O
22 GND -
23 MICI I
24 SB2 I

Display unit (X54-3760-XX B/3)

Pin No. Name I/O
1 GND -
2 PTT O
3 /S1 O
4 /S2 O
5 /EMG O
6 GND -
TX-RX unit (X57-8050-XX)
Pin No. Name I/O
1 +B O
2 SB1 I
3 NC -
4 33A O
76

TERMINAL FUNCTION

Function
CN5
33M input
Clock input
Serial data input
Serial data output
Display version detection
Chip enable
LCD IC chip enable
GND
RX AF input with BEEP and VOICE
Analog squelch voltage output
Analog squelch signal input
VOX voltage output
MIC modulation output
50C input
AF modulation input
GND
VCO modulation output
33A input
Tuning control voltage 2 output
Tuning control voltage 1 output
AF output for amplifi er
GND
MIC modulation input
SB2 input
Function
CN6
GND
Internal PTT input
Key input (SIDE1 key)
Key input (SIDE2 key)
Key input (EMG key)
GND
Function
CN1
Power output after passing through
the fuse
Power input after power switch
No connection
33A output
Pin No. Name I/O
5 VOL I Volume level input for audio control
6 VOL_GND - GND for volume level
7 ENC3 I Rotary switch input
8 GND - GND
9 ENC4 I Rotary switch input
10 ENC2 I Rotary switch input
11 ENC1 I Rotary switch input
CN2
1 SB2 O SB2 output
2 MICI O MIC modulation output
3 GND - GND
4 SPAF I AF input for AF amplifi er
5 TV1 I Tuning control voltage 1 input
6 TV2 I Tuning control voltage 2 input
7 33A O 33A output
8 VCO_MOD I VCO modulation input
9 GND - GND
10 MOD O AF modulation output
11 50C O 50C output
12 MIC I MIC modulation input
13 VOX I VOX voltage input
14 ASQAPC O Analog squelch signal output
15 ASQ I Analog squelch voltage input
16 RXAF_2 O RX AF output with BEEP and VOICE
17 GND - GND
18 /LCDCS O LCD IC chip enable
19 /EVCS O Chip enable
20 DISP_VER I Display version detection
21 SDO0 O Serial data output
22 SDI0 I Serial data input
23 SCK0 O Clock output
24 33M O 33M output
CN3
1 GND - GND
2 PTT I Internal PTT output
3 /S1 I Key output (Side1 key)
4 /S2 I Key output (Side2 key)
5 /EMG I Key output (EMG key)
6 GND - GND
CN4
1 MIC+ I Internal MIC input
2 MIC– - Internal MIC GND
3 SP+ O Internal speaker output
4 SP– - Internal speaker GND
Function