Chapter 7
7-25
7.4.7
Dmax Control
0003-7060
The machine executes Dmax (image density correction) control so as to limit fluctuations in the image density
caused by changes in the environment or deterioration of the photosensitive drum or of toner.
The machine uses the DC controller of the printer unit for the control. When specific conditions exist, the
DC controller creates a patch pattern of individual colors (Y, M, C) on the ITB; then, it uses the patch image sensor
(PS2) to measure the density of the patches to determine a developing bias that will bring about a desirable density
for each color.
The machine executes Dmax control for the following conditions:
when the power is turned on/when the toner cartridge is replaced (with the temperature of the fixing upper roller
being less than 100 deg C)
after jam recovery/after return from a sleep state (with the temperature of the fixing upper roller being less than
100 deg C)
during last rotation every 200 fullcolor prints*1
during execution of PASCAL
in response to changes in the environment
1: Perform this condition until it becomes 4000page printing in total. And after 4000 pages is not performed.
F-7-20
DC-CON
PS2
Содержание iR C6800 Series
Страница 1: ...Apr 6 2004 Service Manual iR C6800 Series iR C6800C ...
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Страница 21: ...Chapter 1 Introduction ...
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Страница 55: ...Chapter 2 Installation ...
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Страница 110: ...Chapter 2 2 52 2 Hook the original holder 1 on the stepped screws you fitted in step 1 F 2 157 1 ...
Страница 115: ...Chapter 3 Basic Operation ...
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Страница 129: ...Chapter 4 Main Controller ...
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Страница 178: ...Chapter 4 4 46 ...
Страница 179: ...Chapter 5 Original Exposure System ...
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Страница 234: ...Chapter 5 5 52 ...
Страница 235: ...Chapter 6 Laser Exposure ...
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Страница 257: ...Chapter 7 Image Formation ...
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Страница 562: ...Chapter 7 7 296 ...
Страница 563: ...Chapter 8 Pickup Feeding System ...
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Страница 614: ...Chapter 8 8 46 F 8 49 10 9 12 11 5 5 4 4 3 5 1 2 1 2 3 1 2 3 4 1 2 3 4 5 ...
Страница 616: ...Chapter 8 8 48 F 8 51 2 1 3 3 3 2 1 1 2 1 2 3 5 6 7 8 ...
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Страница 661: ...Chapter 9 Fixing System ...
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Страница 729: ...Chapter 10 Externals and Controls ...
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Страница 734: ...Contents ...
Страница 742: ...Chapter 10 10 8 F 10 2 FM12 FM11 FM1 FM2 FM4 FM3 FM6 FM7 FM9 FM8 FM5 FM13 FM14 FM10 ...
Страница 787: ...Chapter 11 Maintenance and Inspection ...
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Страница 815: ...Chapter 12 Standards and Adjustments ...
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Страница 868: ...Chapter 12 12 50 ...
Страница 869: ...Chapter 13 Correcting Faulty Images ...
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Страница 882: ...Chapter 13 13 10 13 3 Troubleshooting ...
Страница 891: ...Chapter 13 13 19 F 13 8 F 13 9 Field Remedy Replace the connector with the harness intact 3 4 1 5 2 ...
Страница 896: ...Chapter 13 13 24 F 13 11 F 13 12 Field Remedy Replace the connector with the harness intact 3 4 1 5 2 ...
Страница 898: ...Chapter 13 13 26 Image Sample F 13 13 ...
Страница 900: ...Chapter 13 13 28 Image Sample F 13 15 ...
Страница 929: ...Chapter 13 13 57 Image Sample F 13 45 ...
Страница 932: ...Chapter 13 13 60 Image Sample image of a specific color is too light F 13 47 ...
Страница 933: ...Chapter 13 13 61 image of a specific color is too dark F 13 48 ...
Страница 934: ...Chapter 13 13 62 image is too light overall F 13 49 ...
Страница 938: ...Chapter 13 13 66 F 13 51 1 Web retaining pad 2 Cam 3 Cleaning web 4 Outside heating roller 5 Fixing roller 1 2 2 3 4 5 ...
Страница 944: ...Chapter 13 13 72 F 13 53 F 13 54 Field Remedy Replace the connector with the harness intact 3 4 1 5 2 ...
Страница 966: ...Chapter 13 13 94 F 13 70 PS65 PS38 PS39 PS46 PS44 PS45 PS52 PS53 PS58 PS59 PS37 ...
Страница 968: ...Chapter 13 13 96 F 13 71 SW14 SW15 SW12 SW11 SW1 SW13 SW2 SW3 ...
Страница 974: ...Chapter 13 13 102 F 13 74 13 2 5 3 14 15 16 9 6 12 7 1 11 4 25 24 21 23 19 20 31 29 28 27 26 22 18 17 32 30 10 8 ...
Страница 980: ...Chapter 13 13 108 ...
Страница 981: ...Chapter 14 Self Diagnosis ...
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Страница 1051: ...Chapter 15 Service Mode ...
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Страница 1075: ...Chapter 15 15 11 15 2 1 4 JAM 15 2 1 4 1 Overview 0001 0066 Use it to check jam data F 15 10 1 3 4 5 2 6 7 ...
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Страница 1303: ...Chapter 16 Upgrading ...
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Страница 1395: ...Chapter 17 Service Tools ...
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Страница 1397: ...Contents Contents 17 1 Special Tools 17 1 17 2 Solvents and Oils 17 3 ...
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Страница 1402: ...Chapter 17 17 4 ...
Страница 1403: ...Apr 6 2004 ...
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