Oki OKIPAGE 12i Series, Service Handbook

Page: 41 / 226

2 - 24
The mode setting timing chart during illumination correction is shown below.
The mode setting is carried out in the following manner. LOADI is fixed at high level, and DATAI0
which comes up following this is 4-data latched with the timing of the fall of CLOCKI. The
illumination correction mode is selected based on the latched 4-data combination. Then the mode
becomes valid at the fifth fall of CLOCKI.
The period during which the illumination correction mode is valid is from the fall of the fifth CLOCKI
and while the level of LOADI is high. When the level of LOADI becomes low, the illumination
correction mode is terminated, and the head returns to the normal mode, which is mode with which
the printing is normally carried out.
CLOCKI
LOADI
DATAI0
STRB1I-N
STRB2I-N
STRB3I-N
STRB4I-N
Illumination Correction Mode Setting Timing Chart
Mode setting Mode enabled
Mode set
D4 D3 D2 D1 D0
100ns min
50ns
min
50ns
min
200ns min 100ns min