Canon C2050 Service Handbook page 252

SERVICE MODE
COPIER>TEST
<PG-R>
Use it to generat reader-related test prints.
TYPE
Enter the type No. of the test print you want, and press the Start key to gen-
erate a test print. (Be sure to put the setting back to '0' after printing a test
print.)
Settings 0: Normal printing, 1 to 99: T00-700-01
THRU
Use it to enable or disable the LUT mechanism for test printing.
Settings 0: Enable, 1: Disable
DENS-Y, DENS-M, DENS-C, DENS-K
Use it to adjust the density of each color for test printing (TYPE=5).
Settings 0 to 255: A higher value causes images to be darker.
COLOR-Y, COLOR-M, COLOR-C, COLOR-K
Use it to enable output of each color for each TYPE; for example, to gener-
ate a M mono test print, set COLOR-M to '1', and others to '0'. (Only one
color is available at a time.)
Settings 0: Disable output, 1: Enable output
F/M-SW
Use it to switch between full color and mono color for the PG-R output; in
mono color mode, use it to select the color in relation to COLOR-Y, -M, -C,
and -K.
Settings 0: Full color output, 1: Mono color output
HS-THRU
Use it to enable or disable the result of HAS for the PG-R images.
Settings 0: Enable, 1: Disable
S-110