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Service Guide OL810e
Chapter 2 Operation Description
2.3.4 Revision of LED Head Illumination
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) together as a pair.
The LED correcting head consists of the correction control LSI (MSM6730WAF), LED drivers
(MSM6731BWAF), and an LED array. The block diagram of the LED correcting head is shown below.
The existing LED head receives the printing data from the CPU directly at its LED drivers. With the LED
correcting head, a correction control LSI (MSM6730WAF) is connected between the CPU and LED
drivers, so the printing data is input to the LED drivers through the correction control LSI. In order to
maintain compatibility with the existing LED head, the printing operation of the LED correcting head is
carried out through identical sequence.
The LED correcting head is a 600 dpi head, with the LED drivers located on both sides of the LED array
with a 300 dpi pitch spacing. The printing and correction data obtained from the CPU through four signal
lines are sent to the LED array.
The printing operation timing chart is shown below.
Summary of Contents for OL810e
Page 12: ...4 Universal Paper Cassette 5 High Capacity Second Paper Feeder 6 Power Envelope Feeder...
Page 20: ......
Page 52: ...Base unit...
Page 65: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 131: ...Page 68 Service Guide OL810e Chapter 6 Troubleshooting...
Page 134: ...Page 70 Service Guide OL810e Chapter 6 Troubleshooting 2 2 Paper feed jam...
Page 149: ...Page 84 Service Guide OL810e Chapter 6 Troubleshooting 8 White vertical belts or streaks...
Page 150: ......
Page 167: ...Page 99 Service Guide OL810e Chapter 7 Wiring Diagrams 7 3 Resistance Check...
Page 180: ...Page 106 Service Guide OL810e Chapter A RS 232 Interface Interface Parameter Setting...
Page 181: ......
Page 184: ...Connector pin arrangement 4 Signal Level LOW 0 V to 0 8 V HIGH 2 4 V to 5 0 V 5 Specifications...
Page 228: ...Paper Inlet Jam...