Ricoh Mp C3000 Service Manual

 
SM 4-99 B230/B237/D042 
Trouble 
shooting 
  

B230/B237/D042 4-100 SM 
(From the previous diagram) 
4.5.2 LINE POSITION ADJUSTMENT 
When there are color registration errors on the output, do the line position adjustment as 
follows. 
 
ƒ  Use A3/DLT size paper for this adjustment. 
Test 
1.  Do SP2-111-003 (Mode c: rough adjustment). 
2.  Use SP2-194-007 to check if the result  of the line position adjustment is correct 
(0: Completed successfully, 1: Not completed). If the result is 1, refer to 
‘Countermeasure list for color registration errors’....

 
SM 4-101 B230/B237/D042 
Trouble 
shooting 
 
After Executing SP2-111-003 
Result (SP2-194)  
-007 -010, -011, 
-012  Test pattern check
 Possible cause/Countermeasure  
White image, 
Abnormal image, Low 
density 
ƒ Defective laser optics housing unit 
shutter 
ƒ Defective image processing unit 
ƒ Low density of test pattern 
ƒ Defective BICU 
1.  Replace the shutter motor. 
2.  Replace the high voltage power  supply unit. 
3.  Do the forced process control  (SP3-011-001) or supply some 
toner...

B230/B237/D042 4-102 SM 
 
    The sub scan 
registrations of M, C, 
Y are shifted by more 
than ± 20 mm from 
the sub scan 
registration of Bk. 
ƒ Defective image transfer belt 
ƒ Defective drive units 
ƒ Defective BICU 
1.  Replace the image transfer belt. 
2.  Replace the drum motor. 
3. Replace the BICU.  

 
SM 4-103 B230/B237/D042 
Trouble 
shooting 
 
The main scan 
registration is shifted 
by more than ± 0.66 
mm, but only at the 
central area of the 
image on the output. 
ƒ Defective ID sensor at center 
ƒ Deformed center area on the image 
transfer belt   
ƒ Defective BICU 
1.  Replace the ID sensor. 
2.  Replace the image transfer belt. 
3. Replace the BICU. 
The skew for M, C, Y 
is more than ± 0.75 
mm from the main 
scan registration of 
Bk  
ƒ  Defective PCU 
ƒ Defective laser optics housing unit...

B230/B237/D042 4-104 SM 
 
After Executing SP2-111-001 
Result (SP2-194) 
-007 -010, -011, 
-012  Test pattern check
 Possible cause/Countermeasure  
White image, 
Abnormal image,   
Low density 
ƒ Defective laser optics housing unit 
shutter 
ƒ Defective image processing unit 
ƒ Low density of test pattern 
ƒ Defective BICU 
1.  Replace the shutter motor. 
2.  Replace the high voltage power  supply unit. 
3.  Do the forced process control  (SP3-011-001) or supply some 
toner (SP3-015-xxx).   
4. Replace...

 
SM 4-105 B230/B237/D042 
Trouble 
shooting 
 
The main scan 
registrations of M, C, 
Y are shifted by more 
than ± 1.4 mm from 
the main scan 
registration of Bk. 
ƒ No defective component 
ƒ Defective laser optics housing unit
ƒ Defective BICU 
1.  Do SP2-111-003 again. 
2.  Replace the laser optics housing  unit. 
3. Replace the BICU. 
The sub scan 
registrations of M, C, 
Y are shifted by more 
than ± 1.4 mm from 
the sub scan 
registration of Bk. 
ƒ  No defective component 
ƒ Defective image...

B230/B237/D042 4-106 SM 
(see the note at the bottom of the 
table). 
2. Replace the BICU. 
 
The main scan 
registration of Bk is 
shifted. ƒ  Abnormal SP setting value of 
main scan: Bk 
1.  Adjust the value with  SP2-101-001.  
No color 
registration 
errors  The main scan 
length of Bk is 
shifted. 
ƒ Abnormal SP setting value of 
main scan length detection: Bk 
1.  Adjust the value with  SP2-185-001. 
Low image density 
on the output 
ƒ Low pattern density 
1.  Do the forced process control...

 
SM 4-107 B230/B237/D042 
Trouble 
shooting 
 
The main scan 
registrations of M, C, 
Y are shifted. 
ƒ Defective laser optics housing unit
ƒ Defective ID sensor 
ƒ Defective BICU 
ƒ Incorrect SP value 
1.  Replace the laser optics housing  unit. 
2.  Replace the ID sensor. 
3. Replace the BICU. 
4.  Adjust the value with  SP2-182-004 to -021. 
 
The sub scan 
registrations of M, C, 
Y are shifted. 
ƒ  Defective image transfer belt 
ƒ Defective drive units 
ƒ Defective ID sensor 
ƒ Defective BICU 
ƒ...

B230/B237/D042 4-108 SM 
 
 
ƒ  For details about how to reset the skew correction value, s ee Recovery procedure 
for SC285 and no replacement preparation of  laser optics housing unit in “Laser 
Optics Housing Unit Replac ement” (in the Replacement  and Adjustment section  of 
the manual).