308
Phaser 6200 Color Laser Printer - Service Manual
High-Area Coverage Mode
Continuous printing of an image with density exceeding the toner dispense capability
causes the toner density in the developer to be lowered below the target toner density.
The high area coverage mode retards the next page fed and dispenses toner during
this time so that the toner density time reaches the specified value during continuous
printing.
Admix Mode
If the high area coverage mode can not deal with the reduction of toner density in the
developer or if the machine is used in a high-humidity environment and is relocated
to a low-humidity environment, the reference value for the toner density will change.
This causes a large discrepancy between the measured values from the CTD sensor
and the referenced value for the toner density.
Admix mode dispenses the toner immediately to prevent low-toner density. If the
patch density result measured by the CTD Sensor is lower than the reference value
from the toner density control, then the admix mode is generated.
LED Light Density CTD (ADC) Control of Sensor
The CTD (ADC) sensor is a reflective sensor that emits light from an LED in the
sensor and detects the reflected light from the transfer roller. For exact density
measurement, the sensor output value (reflected light density) must be the specified
value when no toner is put on the Transfer Roller. The reflected light density varies
depending on the Transfer Roller surface condition or dirty condition of CTD (ADC)
sensor surface. The light density emitted from the LED is controlled so that the
reflected light density meets the specified value.
This control is implemented in two ways:
1. Sets the light density so that the light reflected satisfies a specific value.
2. Adjusts the subsequent light density to be within a specific tolerance value.
1.
Light Density Setting
The reflected light density can vary greatly if the transfer roller has been
replaced or the CTD (ADC) sensor has been cleaned. To deal with this
variance the light density is reset when the power is turned on or the front
cover is opened and closed.
The intensity of the LED increases gradually and the set value is adjusted
when the output of the CTD (ADC) sensor exceeds the specified value. If
the output of the CTD (ADC) sensor does not reach the specified value,
even though the light density is increased to the maximum limit, the
controller signals the sensor is dirty. The controller will also signal the
sensor as faulty in the event of extremely high output.
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Страница 141: ...FRU Disassembly Removal and Replacement Procedures 123 Orientation of the Printer S6200 063 ...
Страница 146: ...128 Phaser 6200 Color Laser Printer Service Manual RRP 1 3 Fuser Fan PL 1 1 7 S6200 066 1 2 1 ...
Страница 156: ...138 Phaser 6200 Color Laser Printer Service Manual RRP 1 11 Front Left Cover Assembly PL1 1 29 S6200 075 S6200 076 ...
Страница 162: ...144 Phaser 6200 Color Laser Printer Service Manual RRP 3 3 Paper Pick Assembly PL3 3 1 S6200 098 ...
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Страница 182: ...164 Phaser 6200 Color Laser Printer Service Manual RRP 4 3 Retard Roll Assembly PL4 1 5 1 S6200 183 S6200 184 1 ...
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Страница 236: ...218 Phaser 6200 Color Laser Printer Service Manual RRP 11 3 Main Drive Assembly PL 11 1 14 1 S6200 164 ...
Страница 266: ...248 Phaser 6200 Color Laser Printer Service Manual RRP 14 11 HCF Paper Pick Assembly PL14 4 1 S6200 208 S6200 209 ...
Страница 274: ...256 Phaser 6200 Color Laser Printer Service Manual PL 1 1 Covers S6200 228 ...
Страница 276: ...258 Phaser 6200 Color Laser Printer Service Manual PL 2 1 Universal Paper Tray S6200 229 5 4 2 3 6 ...
Страница 278: ...260 Phaser 6200 Color Laser Printer Service Manual PL 3 1 Paper Feed I S6200 230 1 2 4 4 4 5 5 5 5 3 ...
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Страница 282: ...264 Phaser 6200 Color Laser Printer Service Manual PL 3 3 Paper Feed III S6200 247 ...
Страница 284: ...266 Phaser 6200 Color Laser Printer Service Manual PL 4 1 Housing Assembly Retard S6200 232 ...
Страница 286: ...268 Phaser 6200 Color Laser Printer Service Manual PL 5 1 Chute Assembly In S6200 233 ...
Страница 290: ...272 Phaser 6200 Color Laser Printer Service Manual PL 7 1 Chute Assembly Exit S6200 235 ...
Страница 292: ...274 Phaser 6200 Color Laser Printer Service Manual PL 8 1 Transfer Roller Fuser Assembly CRCs S6200 236 ...
Страница 294: ...276 Phaser 6200 Color Laser Printer Service Manual PL 9 1 Xerographics S6200 237 ...
Страница 296: ...278 Phaser 6200 Color Laser Printer Service Manual PL 10 1 Holder Toner Cartridge Assembly S6200 238 ...
Страница 298: ...280 Phaser 6200 Color Laser Printer Service Manual PL 11 1 Frame and Drive Assemblies S6200 239 ...
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Страница 306: ...288 Phaser 6200 Color Laser Printer Service Manual PL 14 2 High Capacity Feeder Covers S6200 242 ...
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Страница 312: ...294 Phaser 6200 Color Laser Printer Service Manual PL 14 5 High Capacity Feeder Harness Board and Motor S6200 245 ...
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Страница 344: ...326 Phaser 6200 Color Laser Printer Service Manual Chute Assembly Out Duplex 1 2 4 5 6 7 8 3 S6200 007 ...
Страница 355: ...Theory of Operation 337 1 Agitator Assembly with film 2 Toner Motor 3 Auger Assembly 4 Auger Tube S6200 281 4 3 1 2 ...
Страница 363: ...Plug Jack Locator Maps 345 Map 1 S6200 264 ...
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