Ld Unit - Ricoh G-P2 Service Manual

G160 Service Manual

LD Unit

Replacement
Print the SMC report with SP 5990 2 before you replace the LDU.
1. Electrical board unit (see the Service Manual for G-P1 (G104/G105): 'Electrical
Components – 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
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23-Feb-06