Chapter 7
7-17
The following figure indicates the relationship between the environmental change and the target contrast potential.
F-7-17
4. Setup of Grid Bias and Developing Bias
Based on Vd, VL and target contrast potential found with the drum surface potential control, determine the grid bias and the DC developing bias.
First, for eliminating the overlap, draw a line for the developing bias DC (Vdc) at the point where Vback voltage is added to Vd. (The Vback voltage is determined
as 148-165V by the water amount that is measured with the environment sensor.) Then, find out the point where the value of the contrast potential between Vdc
and VL indicated in the following figure is the same as of the target contrast potential, and obtain the target values of the grid bias and the developing bias from the
point.
F-7-18
The measured data of the surface potential can be checked with DISPLAY > DPOT after executing the service mode (FUNCTION >DPC > DPC).
The target values in the field are indicated below.
7.4.6 ATVC Control
0013-3674
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
When transferring toner from the photosensitive drum to the ITB, from the ITB to a paper, the ATVC control is executed to determine the appropriate transfer
voltage.
The ATVC control has the following two control types: the primary transfer ATVC and the secondary transfer ATVC.
Screen Display
Target Value
V00-500V
-450V
V00-800V
-730V
VFF-500V
-180V
VFF-800V
-300V
1
10
20
400
300
200
(V)
(g)
Amount of water
Target Contrast Potential
(V)
(V)
Vd
Vback
Vdc
VL
-520V
-370V
Target Contrast Potential
Grid Bias
Drum Surface Potential /
DC Developing Bias
Summary of Contents for imagePRESS C1
Page 1: ...Oct 22 2008 Service Manual imagePRESS C1 Series ...
Page 2: ......
Page 6: ......
Page 38: ...Contents ...
Page 39: ...Chapter 1 Introduction ...
Page 40: ......
Page 42: ......
Page 72: ...Chapter 1 1 30 F 1 18 ...
Page 85: ...Chapter 1 1 43 T 1 26 ...
Page 88: ......
Page 89: ...Chapter 2 Installation ...
Page 90: ......
Page 94: ......
Page 234: ......
Page 235: ...Chapter 3 Basic Operation ...
Page 236: ......
Page 238: ......
Page 244: ......
Page 245: ...Chapter 4 Main Controller ...
Page 246: ......
Page 248: ......
Page 276: ...Chapter 5 Original Exposure System ...
Page 277: ......
Page 332: ...Chapter 6 Laser Exposure ...
Page 333: ......
Page 342: ...Chapter 6 6 8 F 6 10 1 Laser Light 2 Laser Shutter 3 Laser Shutter Lever 1 1 2 2 1 2 3 3 3 3 ...
Page 344: ...Chapter 7 Image Formation ...
Page 345: ......
Page 431: ...Chapter 7 7 82 ...
Page 462: ...Chapter 8 Pickup Feeding System ...
Page 463: ......
Page 504: ...Chapter 8 8 39 7 F 8 52 8 F 8 53 9 F 8 54 1 3 2 1 2 4 3 1 2 4 3 ...
Page 505: ...Chapter 8 8 40 10 F 8 55 11 F 8 56 12 F 8 57 1 4 2 3 5 4 1 3 2 1 4 2 5 3 ...
Page 506: ...Chapter 8 8 41 13 F 8 58 14 F 8 59 15 F 8 60 5 1 2 3 4 1 2 3 5 4 1 2 3 4 5 ...
Page 507: ...Chapter 8 8 42 16 F 8 61 1 2 3 4 5 ...
Page 509: ...Chapter 8 8 44 3 F 8 64 A Duplexing reversal position 4 F 8 65 2 1 A 2 1 ...
Page 510: ...Chapter 8 8 45 5 F 8 66 6 F 8 67 2 1 2 1 ...
Page 511: ...Chapter 8 8 46 7 F 8 68 8 F 8 69 3 2 1 3 2 1 ...
Page 512: ...Chapter 8 8 47 9 F 8 70 10 F 8 71 3 2 1 2 3 1 ...
Page 513: ...Chapter 8 8 48 11 F 8 72 B Duplexing re pickup stop position 12 F 8 73 3 2 B 1 3 1 2 ...
Page 514: ...Chapter 8 8 49 13 F 8 74 14 F 8 75 1 2 3 1 2 3 ...
Page 516: ...Chapter 8 8 51 F 8 77 SL3 M10 PS17 ...
Page 533: ...Chapter 8 8 68 F 8 154 1 2 4 3 2 3 4 ...
Page 534: ...Chapter 9 Fixing System ...
Page 599: ...Chapter 10 Externals and Controls ...
Page 642: ...Chapter 11 MEAP ...
Page 643: ......
Page 645: ......
Page 695: ...Chapter 12 Maintenance and Inspection ...
Page 696: ......
Page 698: ......
Page 700: ...Chapter 12 12 2 F 12 1 28 9 10 14 13 29 29 11 12 27 6 3 1 2 5 4 7 8 15 16 ...
Page 701: ...Chapter 12 12 3 F 12 2 17 20 24 23 25 26 19 18 24 21 22 ...
Page 704: ...Chapter 12 12 6 F 12 3 1 2 3 4 9 6 5 7 8 11 12 13 14 15 10 ...
Page 715: ...Chapter 12 12 17 F 12 18 1 1 2 2 ...
Page 716: ...Chapter 13 Standards and Adjustments ...
Page 717: ......
Page 719: ......
Page 732: ...Chapter 14 Correcting Faulty Images ...
Page 862: ...Chapter 15 Self Diagnosis ...
Page 894: ...Chapter 16 Service Mode ...
Page 895: ......
Page 1222: ...Chapter 17 Upgrading ...
Page 1223: ......
Page 1225: ......
Page 1256: ...Chapter 17 17 31 F 17 65 2 Turn off the main power switch and remove the USB device ...
Page 1257: ...Chapter 18 Service Tools ...
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Page 1264: ...Oct 22 2008 ...
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