Canon imagePRESS C1 Service Manual - page 389
Chapter 7
7-40
F-7-48
[1] Primary charging wire
[2] Grid line
HVT1: High voltage PCB 1
DC-CON: DC controller
7.5.2 Primary Charging Assembly Cleaning Control
0012-8167
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
This machine cleans the charging wire to prevent dirt on the charging wire in the primary charging assembly.
In this function, the primary charging wire cleaning motor (M19) rotates forward and reverse, and it rotates the cleaner screw.
This moves the wire cleaner to the front side or backside to clean the charging wire.
The DC controller drives the primary charging cleaning motor by controlling two primary charging wire cleaning motor drive signals (PRIM_WIRE_M_1,
PRIM_WIRE_M_2) via the side driver PCB.
The relationship between the drive signal output from the DC controller and the cleaning operation is shown below.
When PRIM_WIRE_M_1 is "0", the wire cleaner moves to the backside.
When PRIM_WIRE_M_1 is "1", the wire cleaner moves to the front side.
DC-CON
PRIM_ON
PRIM_CONT
GRID_CONT
GRID
PRIMAR
Y
J1176
J1501
FT29
J1511
HVT1
[1]
[2]