Canon CLC 1120 Service Handbook page 199

Codes and High-Voltage Outputs
Code
0 ---
1 primary output, grid output
2 primary output, grid output, M color
developing bias output
3 primary output, grid output, C developing
bias output
High-voltage output
Table 4-9a
CHAPTER 4 SERVICE MODE
COPIER>FUNCTION
Description
Absence of high-voltage output
drum motor ON
pre-exposure lamp ON
photosensitive drum 1 rotation
primary output, grid output (500 V) ON
(wait for stop command; equivalent of
photosensitive drum 10 rotations)
primary output, grid output OFF
photosensitive drum 1 rotation
pre-exposure lamp OFF
drum motor OFF
drum motor ON
pre-exposure lamp ON
photosensitive drum 1 rotation
primary output, grid output (500 V) ON
M color developing assembly locked,
developing bias (AC/DC) ON
(wait for stop command; equivalent of
photosensitive drum 10 rotations)
M developing assembly unlocked, developing
bias (AC/DC) OFF
primary output, grid output OFF
photosensitive drum 1 rotation
pre-exposure lamp OFF
drum motor OFF
drum motor ON
pre-exposure lamp ON
photosensitive drum 1 rotation
primary output, grid output (500 V) ON
C developing assembly locked, developing
bias (AC/DC) ON
(wait for stop command; equivalent of
photosensitive drum 10 rotations)
C developing assembly unlocked; equivalent
of 10 rotations)
primary output, grid output OFF
photosensitive rum 1 rotation
pre-exposure lap OFF
drum motor OFF
4-113