KX-HDV100RU, KX-HDV100RUB - Panasonic PBX Service Manual (repair manual). Page 8

8

The IC203 is used for the Ethernet interface.
It is connected from IC203 to the Ethernet port JK1 through a transformer and so is isolated.
It is connected between IC203 and the BBIC(IC302) by high-speed bus called RMII(Reduced Media Independent Interface) bus
operating with 50MHz.

1. Handset call 

Transmitting signal is input from handset microphone 

 input to IC302-pin E14,F14  A/D conversion, Gain adjustment and

echo cancel by built-in DSP of IC302.
Receiving signal input from IP Line 

 Gain adjustment and D/A conversion by DSP of IC302  IC302-pinF12,G12  output

to handset speaker.

C205

DGND

C206

DGND

R273

DGND

R268

R275

R270

JK1

1

2

3

4

5

6

7

8

9

C217

C221

C224

C225

T1

1

TD+

8

RD-

6

RD+

2

TCT

3

TD-

16

TX1+

7

RCT

15

TXCT

14

TX1-

11

RX1+

10

RXCT

9

RX-

4

NC1

5

NC2

12

NC3

13

NC4

NC

1

2

3

1

2

4

3

Pin6(MDI-1) of IC203

Pin 3 (MDI+0) of IC203

Pin 4 (MDI-0) of IC203

Pin5 (MDI+1) of IC203

4

C359

C360

NC

NC

NC

NC

AGND

AGND

AGND

AGND

L305

L306

C361

D303

D304

AGND

AGND

D313

D314

HS_SPP

HS_SPM

CL_HS_SPP

CL_HS_SPM

F12

AMPOUT0

G12

AMPOUT1

H12

AMPOUT2

J12

AMPOUT3

IC302

R315

AGND

C391

C392

AGND

AGND

AGND

D309

D310

L310

L311

AGND

AGND

AGND

AGND

AGND

AGND

MICBIAS

C353

R313

C352

R312

R311

C351

C356

R316

R317

C348

R314

C381

C382

C354

C357

C355

C358

D301

D302

HS_MICP

HS_MICM

AGND

AGND

CL_HS_MICP

CL_HS_MICM

AGND

AGND

F14

DIFFIN0P

E14

DIFFIN0N

NC

NC

NC

NC

NC