Terminal Function - Kenwood TK-285 Service Manual

TK-285/(N)
CN No. Pin No. Name I/O
TX-RX UNIT (X57-619X-XX): TX-RX section
CN1 1 B O
2 B O
3 SB I
4 SB I
5 5M O
6 VOL I
7 E -
8 EN2 I
9 E -
10 EN1 I
CN2 1 MON I
for X54-
SW 2 LAMP I
section
3 PTT I
4 GND -
CN3 1 AF O
2 AFE -
for 3 NC -
X54- 4 PF I
Display 5 CK O
unit 6 RXD I
7 TXD O
8 DT O
9 KRS O
10 KI1 I
11 KI2 I
12 GND -
13 5M O
14 AM O
15 CS O
16 NC -
17 PTT I
18 AUX I
19 LR O
20 LG O
21 LBL O
22 ME -
23 MIC I
24 SB O
DISPLAY UNIT (X54-3210-13 A/2) : DISPLAY section
CN300 1 SB I
2 MIC O
for 3 ME -
X57- 4 LBL I
TX-RX
unit 5 LG I
6 LR I
7 AUX O
32

TERMINAL FUNCTION

Function
Power input after passing through
the fuse.
Power input after passing through
the fuse.
Power output after power switch.
Power output after power switch.
5V.
V o l u m e l e v e l i n p u t f o r a u d i o
control.
GND
Encoder pulse input.
GND
Encoder pulse input.
N o r m a l l y ; 5 V . M O N w h e n
connected GND.
N o r m a l l y ; 5 V . L A M P w h e n
connected GND.
N o r m a l l y ; 5 V . t r a n s m i t w h e n
connected GND.
GND
Audio output.
Audio GND.
Not use.
External PF signal input.
Clock data output.
Serial control signal input.
Serial control signal output.
Data output for LCD driver/decade
counter.
Key scan IC reset output.
KEY input
KEY input
GND
5V.
Audio mute signal output.
Mute: "L". Unmute: "H"
LCD driver chip select output.
Not use.
PTT signal input.
AUX key input.
TX LED control. Normally: 0V,
lighting: 5V.
RX LED control. Normally: 0V,
lighting: 5V.
Backlight LED control.
Normally: 0V, lighting: 5V.
MIC GND.
MIC signal input.
Power output after power switch.
Power input after power switch.
MIC signal output.
MIC GND.
Backlight LED control.
Normally: 0V, lighting: 5V.
RX LED control. Normally: 0V, lighting: 5V.
TX LED control. Normally: 0V, lighting: 5V.
AUX key output.
CN No. Pin No. Name I/O
8 PTT O PTT signal output.
9 NC - Not use.
10 CS I LCD driver chip select input.
11 AM I Audio mute signal input.
Mute: "L", Unmute: "H"
12 5M I 5V.
13 GND - GND
14 KI2 O KEY output
15 KI1 O KEY output
16 KRS I Key scan IC reset input
17 DT I Data input for LCD driver/decade counter.
18 TXD I Serial control signal input.
19 RXD O Serial control signal output.
20 CK I Clock data input.
21 PF O External PF signal output.
22 NC - Not use.
23 AFE - Audio GND.
24 AF I Audio input.
CN301 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 ground.
7 PTT I External PTT input.
8 PF I Programmable function key input.
9 NC - Not use.
10 E - GND
11 5M O 5V output
12 TXD O Serial data output.
13 RXD I Serial data input.
14 NC (E) - Not use (GND)
CN302 1 SP O Output for internal speaker.
2 E - GND
CN304 1 NC - Not use.
2 LEDK I Backlight LED control.
3 LEDA O Backlight LED control.
4 VCI O LCD power supply.
5 SOD O Serial data output for LCD driver.
6 SID I Serial data input for LCD driver.
7 SCLK O Clock data output for LCD driver.
8 CS O LCD driver chip select output.
9 Vcc O 5V
10 GND - GND
DISPLAY UNIT (X54-3210-13 B/2) : SW section
CN303 1 MON O Normally; 5V.,MON when connected GND.
For X57- 2 LAMP O Normally; 5V, LAMP when connected GND.
TX-RX 3 PTT O Normally; 5V, transmit when connected GND.
unit 4 GND - GND
Function