Genicom MatrixPrinter LA36 User Manual
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4.10
Diagnostics .............................................................................................................................................. 4-48
4.10.1
Self-test printing ................................................................................................................................ 4-48
(1)
Starting self-test printing ............................................................................................................ 4-48
(2)
Checking printer performance ................................................................................................... 4-49
(3)
Stopping self-test printing .......................................................................................................... 4-49
4.10.2
Hex dump .......................................................................................................................................... 4-50
(1)
Starting hex dump printing ........................................................................................................ 4-50
(2)
Stopping hex dump printing ...................................................................................................... 4-50
4.10.3
Control panel maintenance functions initiated when power goes on ............................................... 4-51
CHAPTER 5
PRINCIPLES OF OPERATION .......................................................................................... 5-1
5.1
Overview ................................................................................................................................................... 5-1
5.2
Mechanical Operation ............................................................................................................................... 5-2
5.2.1
Print head drive ................................................................................................................................... 5-2
5.2.2
Carriage drive ...................................................................................................................................... 5-3
5.2.3
Ribbon feed ......................................................................................................................................... 5-4
5.2.4
Paper feed ............................................................................................................................................ 5-5
(1)
Continuous forms feeding .......................................................................................................... 5-6
(2)
Cut-sheet feeding ....................................................................................................................... 5-8
(3)
Paper selection ........................................................................................................................... 5-9
(4)
Autoloading ............................................................................................................................... 5-10
(5)
Paper end detection .................................................................................................................... 5-11
5.2.5
Print head gap control (paper thickness adjustment) .......................................................................... 5-14
5.2.6
Color ribbon shift motor (option) ....................................................................................................... 5-15
5.2.7
Option detection mechanism ............................................................................................................... 5-16
5.3
Electrical Operation ................................................................................................................................... 5-17
5.3.1
System configuration .......................................................................................................................... 5-17
(1)
Printer control board (ROM board) ........................................................................................... 5-19
(2)
Power supply unit ...................................................................................................................... 5-19
(3)
Sensors ....................................................................................................................................... 5-19
(4)
Control panel .............................................................................................................................. 5-19
5.3.2
Main controller .................................................................................................................................... 5-23
5.3.3
Interface control .................................................................................................................................. 5-25
(1)
Centronics parallel interface ...................................................................................................... 5-25
(2)
RS-423 serial interface ............................................................................................................... 5-26
5.3.4
Carriage motor control ........................................................................................................................ 5-27
5.3.5
Print head control ................................................................................................................................ 5-31
5.3.6
Paper feed control ............................................................................................................................... 5-33