Led Head Control - Oki OKIPAGE 8p Maintenance Manual

3.7

LED Head Control

An LED correcting head, which is capable of correcting the illumination of the LED for each dot,
is being used in this printer. LED illumination correction function of 16 steps is carried out by using
an EEPROM which is installed in the LSI that maintains the LED illumination correction values,
and an LED correction drivers (MSM6731BWAF or MSM6732BWAF) together as a pair.
The LED correcting head consists of the correction control LSI (MSM6730WAF), LED drivers
(MSM6731BWAF or MSM6732BWAF), and an LED array.
STRB1-N
STRB2-N
STRB3-N
STRB4-N
LOADI
From
CPU
CLOCKI
DATAI0
DATAI1
DATAI2
DATAI3
MSM6730
WAF
LED Array
LED
EEPROM
Correction
Values
MSM6731BWAF
- 10 -
LED Driver
MSM6732BWAF
LED LED LED
LED Driver
Printing and correction data combined signal line
Correction data signal line
LED Driver
MSM6732BWAF
LED LED LED
LED Driver
MSM6731BWAF