Ricoh Aficio 480W Dolphin-C2 Service Manual page 146

28 April 2005
3. If the left line is black, adjust SP2952 001 up, and if it is white, adjust it down.
4. If the right line is black adjust SP2952 002 up, and if it is white, adjust it down.
• Insert the wide original between each adjustment to print another pattern and
check the effect of each adjustment.
• Adjusting these SPs up in intervals of 10 (410, 420, etc.) switches off one
LED for every interval, and adjusting down 10 switches on one LED.
• Adjusting these SPs up less than 10 (411, 412, etc.) decreases the light
intensity of the LED, and adjusting down less than 10 increases the light
intensity.
• Adjust the lines until they are faint; the lines cannot be completely erased.
5. Broken lines across the IPU Test Pattern indicate that the sub scan timing
between LPH1, and LPH2 [A], or between LPH2 and LPH3 [B] is incorrect.
6. To adjust the timing at the joints:
SP2952 011 (SL)
SP2952 012 (SR)
a) First adjust 2952 011, and make a test print.
b) If the timing at joint [A] is incorrect, adjust 2952 011 again.
c) When the timing at joint [A] is correct, adjust 2952 012 until the timing at
joint [B] is correct.
[B]
Adjusts the timing at LPH1, LPH2 [A]
Adjusts the timing at LPH2, LPH3 [B]
3-65
ADJUSTMENTS
[A]
B188R904.WMF