KX-NS5180X-SX, KX-NS5180XSX - Panasonic PBX Service Manual (repair manual). Page 11

11

This circuit converts 4W-voice signal inside PBX and 2W-voice signal. It is configured by Op-Amp and BN (Balance Network) in
CODEC.

DSP is controlled by CPU on the CPU board via command / status register interfaces.

A gas arrester (SA100) with discharge voltage 230V is mounted between Tip and SFG, Ring and SFG. 
And a discharge tube (AL2) with the discharge voltage 1kV is mounted between SFG and FG.

From DSP(IC101)

To DSP(IC101)

+

-

+

-

VIN[0]

R126A

C110A

DG

C111A

R118A

DG

C109A

C112A

R125A

C113A

D109A

1

3

2

VH1

VH1

VH1

+15V

R121A

T100A

3

1

4
5
6

+3.3V

C138A

C139A

R122A

R124A

IC100A

4

VEE

8

VCC

IC100A

3

2

1

IC100A

5

6

7

C107A C145A

R119A

R120A

R123A

R127A

R132A

R133A

C108A

C121A

C120A

SA100A

1

2

3

AL2

SFG

FG

TH100A

SFG

C102A

L100A

1

4

2

3

J100A