KX-TDA6381X, KX-TDA6381SX - Panasonic PBX Service Manual (repair manual). Page 15

15

• CODEC Control...IC6, IC7

This uses PEB2466. CODEC interface DCLK, CS, DOUT and DIN configure the analog characteristic such as BN, frequency
characteristic, level, lateral consonant. Also, the built-in I/O port is used as HOOK detection, DTMF detection, BELL relay con-
trol.

• A/D, D/A Conversion

This converts 4 wire analog signal and G.711 format PCM (

/A).

A gas arrester (SA1) is mounted between T and SFG, R and SFG.
And a discharge tube (SA3) is mounted between SFG and FG. Furthermore, Zenner Diode (D5) with the discharge voltage 25V
is mounted on the PBX side of the photo MOS relay for adding line.

REVDET[3]

CPCDET[3]

BELLI[3]

REVDET[3]

DIAL[3]

SHNT[3]

DIAL[2]

CPCDET[2]

VIN[3]

SHNT[2]

VOUT[3]

BELLI[3]

DT_STD[3]

CLK

C_CS[0]

DCLK

FH

nRST

DHW

DOUT

UHW

DIN

R2

1

15

INT34

34

INT12

20

DOUT

19

DIN

23

RESET

22

MCLK

17

CS

18

DCLK

9

SO4_1

8 S04_0

10 SB4_0

11 SB4_1

14 SI4_1
13 SI4_0
12 SB4_2

33

CHCLK1

16

CHCLK2

62 Vout4
64 Vin4

R2

0

DG

C9

2

I/O port with
a built-in CODEC

ASIC interface

T[0]

DG

DG

+5V

+5V

SFG

R

17A

D2A

R3

A

C1

A

D1A

D4

A

R

11A

R

14A

R15A

R5

A

J1A

RL

2

A

4

3

2

1

J4A

PC

4

A

1

2

3

4

L1A

1

2

3

4

C3

A

CN3 3

J7

A

Q5A

E

C

B

ZN

R

2

A

CN2

1

26

D3A

1

2

3

4

TH1A

ZN

R

1

A

RL3A

4

3

2

1

D5

A

SA

1

A

12

3

Q4A

E

C

B

F G

SFG

ZNR1

F G

SA3