Charge Corona Unit - Ricoh B156 Service Manual

6.7.2 CHARGE CORONA UNIT

Power Supply
[A]: High voltage supply
[B]: Charge corona unit
[C]: Harness
High voltage supply [A]
 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).
B156/B220
CÓPIA NÃO CONTROLADA
Harness [C] Charge corona unit [B] (negative charge)
[A]
6-34
CÓPIA NÃO CONTROLADA
PHOTOCONDUCTOR UNIT (PCU)
[B]
[E]
[D]
[C]
[C]
[A]
B156D026.WMF
[B]
B156D027.WMF
SM