Oki Microline 390 User Manual

3.1.5 Printhead drive circuit
This circuits is used to drive the head magnets corresponding to HEAD DATA 1 to 24 (the head pins)
by the HD DV signal (even or odd trigger) for printing purposes. When-the HD DV signal is at “L”
level, the head driving time is determined by the HD DV pulse width. This pulse is developed by a RC
circuit within the IC. The pulse width of HD DV varies with the number of pins being driven. The
drive time is lengthened if a larger number of pins are to be driven, but shortened if less pins are to
be driven.
IPT
b- 37011s
------+I
r-l
rl
rl
I
Slicelevel (47.9 pin)
/I I\ I
I I
II I\
/
Slicelevel (47, 11 pin)
I
EN (ENABLE)
COM
(COMMON)
Serial data
transfer
ODD and EVEN
call current
waveform
3-6

Oki Microline 390 Specifications

General

Print Technology	Dot Matrix
Number of Pins	24
Resolution	360 x 360 dpi
Print Resolution	360 x 360 dpi
Noise Level	55 dB
Connectivity	Parallel
Paper Handling	cut sheet
Emulations	IBM ProPrinter
Paper Width	4 to 10 inches
Weight	13 lbs