Canon imagePRESS C1 Service Manual - page 391
Chapter 7
7-42
F-7-50
[1] Pre-transfer charging wire
HTV1: High voltage PCB 1
DC-CON: DC controller
7.5.4 Pre-Transfer Charging Assembly Cleaning Control
0012-8169
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 pre-transfer charging assembly.
In this function, the pre-transfer charging wire cleaning motor (M20) 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 pre-transfer charging wire cleaning motor by controlling two pre-transfer charging wire cleaning motor drive signals
(DRUMPOST_M_11, DRUMPOST_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 DRUMPOST_M_1 is "0", the wire cleaning moves to the backside.
- When DRUMPOST_M_1 is "1", the wire cleaning moves to the front side.
F-7-51
[1] Pre-transfer charging assembly
[2] Charging wire
Pre-transfer high voltage transformer
DC-CON
POST_A
C_ON
POST_DC_ON
POST_CONT
POST
J1111B
J1501
J1514F
FT1521
HVT1
[1]
DR
UMPOST_M_1
J1167-8
J1167-9
J3416-8
J3416-9
DR
UMPOST_M_2
DC-CON
Side driver PCB
[5]
[1]
[2]
[3]
[4]