Canon imagePRESS C1 P, Service Manual, Page: 738 / 1265

Chapter 14
14-3
14.2.3 Selecting the Test Print TYPE
0013-4602
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
1) Set number of prints and paper size.
2) Select the followings in service mode:
COPIER > TEST > PG
3) Make the following selections:
COPIER > TEST > PG > TYPE
4) Enter TYPE number by the numeric keypad, and then press OK key.
5) Select the color in question (output by '1') in COLOR-Y/M/C/K.
6) Set density in DENS-Y/M/C/K (effective only for TYPE=5).
7) Press start key.
14.2.4 16-Gradation (TYPE=4)
0013-4603
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
This test print can mainly check gradation performance, image fogging, white line, and density unevenness at the rear/front.
(1) Gradation
If there is no 16-step density gradation, it may be caused by fault of drum unit or laser scanning system.
(2) Foggy image
If there is foggy image only at the white area as shown in the figure below, it may be caused by fault of drum unit or laser scanning system.
(3) Vertical white/black line
If there is white line in the image, it may be caused by fault of developing system.
(4) Density unevenness at the rear/front
If there is density unevenness at the rear/front, it may be caused by fault of drum unit, laser scanning system or transfer unit.
F-14-1
14.2.5 Full Area Half Tone (TYPE=5)
0013-4604
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
This test print can mainly check transfer failure, black line, white line, and pitch unevenness.
MEMO:
(1) Output by every developing color is available by specifying the developing color COLOR-Y/M/C/K in the following service mode: COPIER>TEST>PG
(2) In the case of changing density of the test print, execute followings in service mode for density setting: TEST>PG>DENS-Y/M/C/K
(1) Transfer failure
If there is transfer failure, it may be caused by fault of transfer (intermediate transfer/secondary transfer) unit.
5
full area half tone
6
grid
7-9
- (for R&D)
10
MCYBk horizontal stripes (sub scanning direction)
11
- (for R&D)
12
64-gradation
13
- (for R&D)
14
full color 16-gradation
15-100
- (for R&D)
TYPE NO.
description
16-Gradation