Ricoh G-P3 Service Manual page 54

1. Electrical board unit (* Electrical board unit)
2. LDU [A]
Color Registration Adjustment
• You must manually do the color registration adjustment after you install the new LDU.
• When the polygon mirror motor or LDB unit is defective, only replace the defective parts. At this time,
if only the motor is changed it is not necessary to do this adjustment procedure.
1. Print the SMC report with SP 5990 2 before you replace the LDU. Find the values for SP 2181 1, SP
2181 11, 2181 21, and 2181 31.
2. Do SP 2111 2 (Pro. Position Adj > Execute) to roughly adjust the line position after you install the new
LDU. "Result = OK" shows on the LCD if this is done correctly. If not, do it again until you get "OK".
3. Do SP2111 3 (Skew Adjust. > Execute) to measure the skew values for each color. "Result = OK"
shows on the LCD if this is done correctly. If not, do it again until you get "OK".
4. Check the skew values with SP 2181: Then write down the values. (You can also check these if you
print the SMC report again with SP 5990 2. The values will probably be different from the values on
the report that you printed in step 1.)
• SP 2181 1 for black skew
• SP 2181 11 for magenta
• SP 2181 21 for cyan
• SP 2181 31 for yellow
Laser Optics
3
53