KX-HDV330RU, KX-HDV330RUB - Panasonic PBX Service Manual Supplement (repair manual). Page 13

13

The key data is under the matrix control by IC101.
The key information output from KEY_OUT is input into KEY_IN, when the key is pressed.
The HOOK key is independent from Key Scan Matrix and taken into the port singularly.

The lighting of the LEDs is controlled(static lighting) by IC101.

KEY_IN[0]

KEY_IN[2]
KEY_IN[3]

KEY_IN[5]

KEY_IN[4]

KEY_IN[1]

T8

W8
R9

V9

V10

V8

T9
U9

R19

W9

T10

U8

KEY_OUT[0]

KEY_OUT[1]

KEY_OUT[2]

KEY_OUT[3]

KEY_OUT[4]

SW501

1

2

SW502

1

2

SW503

1

2

SW504

1

2

SW505

1

2

SW506

1

2

SW507

1

2

SW508

1

2

SW509

1

2

SW510

1

2

SW511

1

2

SW512

1

2

SW513

1

2

SW514

1

2

SW515

1

2

SW516

1

2

SW517

1

2

SW518

1

2

SW519

1

2

SW520

1

2

SW521

1

2

SW522

1

2

SW523

1

2

SW524

1

2

SW525

1

2

SW526

1

2

L502

D515

DG

D510

D511

D512

NC

D513

NC

D514

NC

DG

DG

DG

DG

DG

MENU

HOME

CANCEL

HOLD

1

2

3

MESSAGE

REDIAL

4

5

6

CONF

7

8

9

*

0

#

SPHONE

MUTE

HEAD

R

E

F

S

N

A

R

T

+

l

o

V

-

l

o

V

IC101

HOOK SW

5V

Q519

4.7k

47k

DG

IC101

D522

B

R540

E3