Kenwood TK-480 User Manual

TK-480/481

1

STRB

ES

Strobe

2

DATA

DAT

Data

3

CLK

CK

Clock

4

Q1

LEDR

Red LED.

H : On, L : Off

5

Q2

LEDG

Green LED.

H : On, L : Off

6

Q3

KEYBLT

Key backlight.

H : On, L : Off

7

Q4

MMUTE

MIC mute.

H : Unmute, L : Mute

8

VSS

GND.

9

QS

IC18 data output.

10

Q’S

NC

11

Q8

DTMPD

DTMF decode IC power down.

H : Power down, L : Busy

12

Q7

Not used.

13

Q6

5TC

TX power control.

H : RX, L : TX

14

Q5

5RC

RX power control.

H : TX, L : RX

15

OE

OE

Output enable.

16

VDC

5M

+5V.

■ Circuit diagram

3

CV

2

MD

1

TA

L1

C2

C8

R2

L2

R4

D2

D3

C1

Q2

Q3

C12

D1

C13

C4

C5

R6

R3

C15

4

OUT

5 GND

R7

C9

C10

C11

6 5C

R5

R8

L4

R9

L3

Q1

R1

C17

Q1 : 2SK1824
Q2 : 2SC4226(R25)
Q3 : 2SC5008

D1 : HVC350B
D2 : HVC202A
D3 : MA2S077

C14

C16

C7

C6

C3

1

STRB

ES

Strobe

2

DATA

DAT

Data

3

CLK

CK

Clock

4

Q1

AM1

Audio mute 1.

H : Unmute, L : Mute

5

Q2

LOK

Link complete (Programmable active H/L).

6

Q3

TA

Talk around.

H : Off, L : On

7

Q4

NC

8

VSS

GND

9

QS

NC

10

Q’S

NC

11

Q8

SQ

External squelch (Programmable active H/L).

12

Q7

CODE2

Option board data 2.

13

Q6

CODE1

Option board data 1.

14

Q5

OPT

Option board control.

Please set option board type in the

KPG-49D.

H : On, L : Off

Auxiliary signal outut. Please set key

function in the KPG-49D (Program-

mable active H/L).

15

OE

OE

Output enable.

16

VDC

5M

+5V.