Ricoh LDD250, Service Manual

Page: 145 / 459

DRUM SECTION
C262/C265 3-70 SM
3.8.7 INK DETECTION
SP6-8-1 Ink Detection Pulse
Purpose: With this SP, you can adjust the ink detection pulse very simply.
NOTE: This procedure is to calibrate the voltage of the ink sensor for the Ink
End condition. This ensures that the sensor can correctly detect the Ink
End condition. This procedure is easier to do than the original
procedure (Ink Detection Adjustment – next page).
[A]
[B]
IMPORTANT: If you cannot correctly calibrate the sensor with this procedure, try
the Ink Detection Adjustment procedure.
1. Remove the ink around the ink roller:
•
Set SP2-2-1 (Ink Detection) to OFF , and then
•
Feed paper until the ink reaches the end condition
2. Pull the drum out and remove the drum front cover [A] and ink cartridge.
3. Push the drum back inside the machine.
4. Turn
ON the main switch.
5. Access SP6-008-1 (Ink sensor).
6. The detection voltage is displayed on the operation panel. Turn VR901 [B] on
the ink detection board until the value becomes 6.0
μ
s .
7. Return SP2-2-1 to ON .
Rev. 05/2006
⇒