Ricoh MP C2504 Field Service Manual page 667

4. Replacement and Adjustment
Any of SP2-194-010 or
011 or 012 shows "5"
658
Result of Check Image density low
Causes Pattern density low
Execute the process control
Solution
Supply toner
Pattern -
Leading edge registration for "M", "C", and/or "Y"
Result of Check
shifts over ±1.4 mm from that of "K".
1. Normal
Causes 2. Laser unit failure
3. BCU(IPU) failure
1. Execute SP2-111-003 (Forced Line Position Adj.:
Mode c)
Solution
2. Replace laser unit
3. Replace BCU(IPU)
Pattern 3