Service manual

Parallel (Centronics)
The most simple way to connect to other hosts(not PC compatible) or
terminals is:
The parallel port is a standard 36-pin Centronics. Its pin
assignments are listed as following.
Printer Terminal/Host
Pin 2- RxData ……… TxData
Pin 3- TxData ……… RxData
Pin 5- Ground ……… Ground
Pin Direction Definition Pin Direction Definition
1 In /STROBE 13 Out SELECT
2 In Data1 14,15 NC
3 In Data 2 16 - Ground
4 In Data3 17 - Ground
5 In Data4 18NC
6 In Data5 19~30 - Ground
7 In Data6 31 NC
8 In Data7 32 Out /Fault
9 In Data8 33~36 - NC
10 Out /ACK
11t Out BUSY
12 Out PE
In general, as long as the data quantity is not too large and you
use Xon/Xoff as flow control, it will be problem free.
Baud rate: 2400, 4800, 9600, 19200 and 38400.
(programmable by command)
Data format : always 8 data bits, 1 start bit and 1 stop bit.
Parity : always non parity
Handshaking : XON/XOFF as well as CTS/RTS (hardware flow
control).
Auto Polling
If you run an application with the bundled printer driver under
Windows and use the serial port, you should check the above
Both the serial port and parallel port of this printer can be activated at
the same time, i.e the printer can simultaneously communicate with two
PC via different port. However as no port contention is made for this
printer, if both PC transmit data at the same time to this printer, the data
may become damaged in the receiving buffer.
parameters and set the flow control to "Xon/Xoff "or "hardware".
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