3
5.
Communication interface:
It is used to achieve the data exchange between
the printer and the PC, the communication interface board is removable and
multiple interfaces such as serial interface, parallel interface, USB interface
and Ethernet interface can all be supported.
When the printer does not print or print out messy codes, you can replace
with a better communication interface board to judge whether it is the failure
caused by the communication interface board.
6.
Key board:
There are keys, power indicator light and status light on the key
board. And it is used to press the button to move paper, make self-test, enter
DUMP mode (hex mode) and indicate various error conditions.
When the printer can print as normal, but the paper moving button does not
work well, it means the key board gets wrong. If the printer works well, the
power light on the key board is off, it means the key board gets wrong.
Product parts
