Ricoh TH-C1b - Charge Corona Unit; Power Supply; Grid and Wire Cleaning

PHOTOCONDUCTOR UNIT (PCU) 10 February 2005
6-34
6.7.2 CHARGE CORONA UNIT
Power Supply
[A]: High voltage supply
[B]: Charge corona unit
[C]: Harness
High voltage supply [A] " Harness [C] " Charge corona unit [B] (negative charge)
(☛ ! Photocopying Processes – Charge – Corona Charge – Scorotron Method)
Grid and Wire Cleaning
[A]: Motor
[B]: Screw
[C]: Wire cleaner
[D]: Corona wire
[E]: Grid
The motor [A] drives the bottom screw [B], which moves the wire cleaner [C]
forward or backward. The cleaner cleans the grid [E] and corona wire [D].
The wire is cleaned at these times:
• Immediately before the machine goes to low power mode, if there was between
200 and 600 development counts since the last cleaning.
• Between 600 (SP2-801-1) and 1200 (= the sum of the settings in SP2-801-1 and
–3 plus 200) development counts at job end.
• If the count gets to 1200 in the middle of a job (= the sum of the settings in SP2-
801-1 and -3 plus 200) development counts (stops in the middle of the job).
B156D026.WMF
B156D027.WMF
[A]
[B]
[C]
[A]
[C]
[B]
[D]
[E]