Terminal Function - Kenwood TK-290 Service Manual

TK-290
CN No. Pin No. Name I/O
TX-RX UNIT (X57-5390-10)
CN400 1 CH D
2 CH A
for 3 CH C
X53 4 CH B
(B/6) 5 E
6 VOL
7 5CM
8 B+
9 B+
10 SB
11 SB
12 TOGGLE
13 KEY2
14 Q6
15 Q7
16 LCDCS
17 CLK
18 DAT
19 LAMP
20 TXLED
21 BLED
22 5M
CN401 1 TCONT
2 OPPTT
for 3 AMPSW
X53 4 EXAFC
(A/6) 5 INAFC
6 KRS
7 KCK
8 SOD
9 KEY1
10 KEY2
11 LCS
12 PTT
13 N/CSW
14 NC
15 CLK
16 DAT
17 E
18 SB
19 SB
20 5M
21 MICE
22 MIC
23 AF
24 AFE
25 AFE
70

TERMINAL FUNCTION

Function
I CH switch data.
I CH switch data.
I CH switch data.
I CH switch data.
– GND.
I Voltage level input for audio control.
– 5V.
– Power input after passing through the fuse.
– Power input after passing through the fuse.
– Power output after power switch.
– Power output after power switch.
I Normally : 5V, switched toggle when
connected GND.
I Key input.
O Key scan IC Q6 signal output.
O Key scan IC Q7 signal output.
O Chip select output for LCD driver.
O Clock data output for LCD driver.
O Data output for LCD driver.
– Backlight LED control.
Normally : 0V, Lighting : 7.5V
– TX LED control.
Normally : 0V, Lighting : 7.5V
– Busy LED control.
Normally : 0V, Lighting : 7.5V
– 5V.
O For optional board. (See page 22.)
O For optional board. (See page 22.)
O Audio AMP control switch output.
O External speaker switch control.
O Internal speaker switch control.
O Key scan IC reset output.
O Key scan IC clock data output.
– Not use.
I Key input.
I Key input.
– Not use.
I PTT signal input.
O Noise canseler microphone switch output.
– Not use.
O Clock data output.
O Data output.
– GND.
– Power output after power switch.
– Power output after power switch.
– 5V.
– MIC GND.
I MIC signal input.
O Audio output.
– Audio GND.
– Audio GND.
CN No. Pin No. Name I/O
26 SP+ I BTL input + for external speaker.
27 SP– I BTL input – for external speaker.
28 MUTE O Audio mute signal output.
29 SD TO O For optional board.
30 MAN D O For optional board.
31 LAMP O Backlight LED control.
Normally : 0V, Lighting : 7.5V
32 Q7 O Key scan IC Q7 signal input.
33 Q6 O Key scan IC Q6 signal input.
CN402 1 AFE – Audio GND.
2 AFE – AUdio GND.
CN403 1 SSW I EXT/INT speaker switch input.
2 SP+ O BTL output + for external speaker.
3 SP– O BTL output – for external speaker.
4 MSW I EXT/INT MIC switch input.
5 EMC I External microphone input.
6 ME – External microphone GND.
7 PTT I External PTT input.
8 PF I Programmable function key input.
9 NC – Not use.
10 E – GND
11 5M – 5V.
12 TXD O Serial data output.
13 RXD I Serial data input.
14 NC – Not use.
CONTROL UNIT (X53-3930-XX) (A/6)
CN1 1 Q6 O Key scan IC Q6 output.
2 Q7 O Key scan IC Q7 output.
for 3 LAMP I Backlight LED control.
X57 Normally : 0V, Lighting : 7.5V
4 MAN D I For optional board. (See page 22.)
5 SD TO I For optional board. (See page 22.)
6 MUTE I Audio mute signal input.
7 SP– O BTL output – for external speaker.
8 SP+ O BTL output + for external speaker.
9 AFE – Audio GND.
10 AFE – Audio GND.
11 AF I Audio output.
12 MIC O MIC signal input.
13 MICE – MIC GND.
14 5M – 5V.
15 SB – Power output after power switch.
16 SB – Power output after power switch.
17 E – GND.
18 DATA I Data input.
19 CLK I Clock data input.
20 NC – Not use.
21 N/CSW I Noise canseler microphone switch input.
22 PTT O PTT signal output.
23 LCS – Not use.
24 KEY2 O Key output.
25 KEY1 O Key output.
Function