Sharp JX-8200 Service Manual page 177

SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
(3) INTERFACE
The Laser Printer is equipped with the following interfaces:
1) IEEE 1284 Parallel (Standard)
2) RS-232C serial (option)
3) AppleTalk (option)
4) Network (option)
This section provides information on the type of connector, pin con-
figuration, pin signals, and signal timing charts.
a. IEEE 1284 Parallel
Connector
Female 36-pin DDK 57LE-40360-730B (D29) or equivalent.
18
36
Pin Configuration
The pin numbers and signal names are given in the table below.
1284-B Connetor Pin Assignments
PIN # Source
Compatible Nibble
1 H nStrobe HostClk
2 Bi-Di Data 1 (Least Significant Bit)
Bi-Di ∗
3 Data 2
Bi-Di ∗
4 Data 3
Bi-Di ∗
5 Data 4
Bi-Di ∗
6 Data 5
Bi-Di ∗
7 Data 6
Bi-Di ∗
8 Data 7
Bi-Di ∗
9 Data 8 (Most Significant Bit)
10 P nAck PtrClk
11 P Busy PtrBusy
12 P PError AckDataReq AckDataReq
13 P Select Xflag
14 H nAutoFd HostBusy
15
16
17
18 P
19
20
21
22
23
24
25
26
27
28 Signal GND (PError, Select, nAck)
29 Signal GND (Busy, nFault)
30 Signal GND (nAutoFd, nSelectIn, nInit)
31 H nInit nInit
32 P nFault nDataAvail
33
34
35
36 H nSelectIn 1284 Active 1284 Active
∗ Data signals will be driven by some but not all peripheral devices.
Pins not defined by this spec are used by various manufacturers at
their own risk.
The 1284-B connector is a 36 signal ribbon type connector.
1
19
Mode
Byte ECP EPP
(Not used) (Not used) (Not used)
HostClk HostClk nWrite
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
PtrClk PeriphClk Intr
PtrBusy PeriphAck nWait
nAckReverse User Defined 1
Xflag Xflag User Defined 3
HostBusy HostAck nDStrb
Not Defined
Logic Gnd
Chassis Gnd
Peripheral Logic High
Signal GND (nStrobe)
Signal GND (Data 1)
Signal GND (Data 2)
Signal GND (Data 3)
Signal GND (Data 4)
Signal GND (Data 5)
Signal GND (Data 6)
Signal GND (Data 7)
Signal GND (Data 8)
nInit nReverseRequest nInit
nDataAvail nPeriphRequest User Defined 2
Not Defined
Not Defined
Not Defined
1284 Active nAStrb
b. RS-232C Serial
Connector
Female 25-pin DDK 17LE-13250-28 (D4CK) or equivalent.
13 10
25
Pin Configuration
The pin numbers and signal names are given in the table below.
PIN SIGNAL NAME
1 FG (Frame Ground)
2 TXD (Transmitted Data)
3 RXD (Received Data)
4 RTS (Request to Send)
6 DSR (Data Set Ready)
7 GND (Signal Ground)
20 DTR (Data Terminal Ready)
Signal Descriptions
Pin 2 (TXD, printer output):
Data from the printer to computer.
Pin 3 (RXD, printer input):
Data from the computer to printer.
Pin 4 (RTS, printer output):
High signal sent to the computer before the printer transmits.
This signal is high when the printer power is on.
Pin 6 (DSR, printer input):
High signal indicates the computer is ready.
This signal is not required to receive data.
Pin 20 (DTR, printer output):
High signal indicates the printer is ready and low signal indicates
the printer is busy.
Data Format
Start bit 1
8 ∗
Data bits
Stop bit 1
None ∗ (EVEN/ODD)
Parity
∗ The status of these items can be changed.
13 – 18
4 1
21 18 14
SOURCE
...
PRINTER
HOST
PRINTER
HOST
...
PRINTER