DOWNLOAD Sharp ER-A490 (serv.man4) Service Manual ↓ Size: 375.67 KB | Pages: 35 in PDF or view online for FREE

SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR :  DATA SET READY
RTS :  REQUEST TO SEND
DCD:  DATA CARRIER DETECTOR
CTS :  CLEAR TO SEND
CI

: CALLING INDICATOR

FG : FRAME GROUND

SD

: TRANSMITTED DATA

RD

: RECEIVED DATA

SG

:  SIGNAL GROUND

PE

: PATER END

FAULT : MOTOR LOCK
BUSY

: BUSY

DCD

:  DATA CARRIER DETECTOR

DSR

:  DATA SET READY

CTS

:  CLEAR TO SEND

FG

: FRAME GROUND

SD

SD

RD

SG

RD

3

2

4

6

7

1

8

5

2

3

20

6

4

8

5

7

RTS

DCD

DTR

DSR

CTS

CI

22

9

SG

RTS

DCD

DTR

DSR

CTS

CI

FG

1

FRAME GROUND is connected
to the shield of the cable.

MODEM

TERMINAL

25PIN D-SUB

9PIN D-SUB

SD

2

DCD

R D

FG

R D

3

20

1

1

2

8

KITCHEN PRINTER: ER-02RP

SG

7

PE

10

FAULT

12

BUSY

3

5

6

ECR

SD

SG

DSR

CTS

25PIN D-SUB

9PIN D-SUB

FRAME GROUND is connected
to the shield of the cable.

1 – 4

•

8bits ASCII code

•

No start bit

•

Non parity

•

One stop bit

•

Rate: 9600 asynchronous (PGM programming: #6412, #6552)

•

DTR/DSR control

SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR :  DATA SET READY
RTS :  REQUEST TO SEND
DCD:  DATA CARRIER DETECTOR
CTS :  CLEAR TO SEND
INIT : PRINTER INITIAL
FG : FRAME GROUND

*

NOTE:

•

Slip printer:

Set TM-295 DIP switch to ON for use.

 

FG

1

R D

TXD

DTR

SD

2

7

20

2

3

7

8

SLIP

25

INIT

RXD

3

RTS

4

DSR

6

SG

4

5

6

ECR

CTS

ER

GND

DSR

INIT

25PIN D-SUB

9PIN D-SUB

1 – 5

ACK

EOT

( 1 )  Inquines of the satellite.

( 4 )  Receives ACK.

( 5 )  Sends the text.block.

( 7 )  Resends the text block if NAK is received.
        Resends the text block up to two times.
        Sends EOT and terminates the operation
        with error if NAK is still received after the
        second resending of text block.

( 9 )  Sends the next text if ACK is received and
        sends EOT and terminates the operation if
        data transfer is finaiized.

( 2 )  Receives ENQ.
        Check the terminal No.
        to see if it is its own.

( 3 )  Sends ACK.

( 6 )  Receives text.
        Checks the check sum,text
        data,etc. And goes to (8)
        if there is no error in them.

( 8 )  Sends ACK.

( 10 )  Terminates the operation if EOT
          is received.

ENQ

Host

Satellite

Dummy
(3bytes)

Terminal No.
(6bytes)

Start code

Text (parameter)

End code

Text (FDS)

Text (DATA)

Three types of
text block formats
are available

NCK

ACK

( 8 )'  Sends NAK if any error
         occurs.

1 – 6

ACK

EOT

( 1 )  Inquines of the satellite.

( 4 )  Receives ACK.

( 5 )  Sends the text.block.

( 7 )  Resends the text block if NAK is received.
        Resends the text block up to two times.
        Sends EOT and terminates the operation
        with error if NAK is still received after the
        second resending of text block.

( 9 )  Sends the next text if ACK is received and
        sends EOT and waits for ENQ.

( 2 )  Receives ENQ.
        Checks the terminal No.
        to see if it is its own.

( 3 )  Sends ACK.

( 6 )  Receives text.
        Checks the check sum,text
        data,etc. And goes to (8)
        if there is no error in them.

( 8 )  Sends ACK.

( 10 )  Terminates the operation if EOT
          is received.

ENQ

Host

Satellite

Dummy
(3bytes)

Terminal No.
(6bytes)

Start code

Text (parameter)

End code

Text (DATA)

NAK

ACK

( 8 )'  Sends NAK if any error
         occurs.

ENQ

ACK

Continued on the
next page

1 – 7