Canon GP215 Service Handbook page 162

SERVICE MODE
4. PD Density Auto Correction
• This mode must be executed in combination with 200PWM density auto correction and 600PWM den-
sity auto correction.
Item
PD density auto correction
7–54
*4* FUNCTION 04 – > ( )
PD PRINT (START)
WHITE MEASURE (OK)
DENSITY SAMPLING (OK)
DATA SET
A=+xxx, B=+xxx, D=+xxx
xx xx xx xx xx xx xx
xx xx xx xx xx xx xx
MULTI 0
>CASSETTE1
CASSETTE 2
+
1) Press 'PD PRINT' to highlight; then, press the
Copy Start key.
• A 15-gradation test pattern will be generated.
2) Place a blank sheet of paper (the whitest of all
used by the user; no color copier paper allowed)
on the copyboard glass; then, press 'WHITE
MEASURE' to highlight, and press the OK key.
• The scanner makes a single scan.
3) Replace the paper with the test pattern generated
previously; then, press 'DESNITY MEASURE' to
highlight, and press the OK key.
Printed side down
4) Check the values under A, B, and D:
20≤A≤50
–40≤B≤40
0≤D≤8
5) If the values are as indicated, press 'DAT SET' to
highlight, and press the OK key.
CANCEL
JUMP
A4 1
A4 1
–
OK
Description Reference
page
See p.2-13