Ricoh FT4480 Field Service Manual page 218

5. LINES AT IRREGULAR INTERVALS
- Possible Causes -
• Deformed cleaning blade scraper
• Toner clogged in cleaning unit
- Action -
Is toner clogged in the cleaning unit?
N
I
Check the cleaning blade scraper.
• Is it straight?
• Does it contact the cleaning blade properly?
• Does it move correctly?
Y N
I
Correct or replace any defective parts.
Clean the cleaning unit. Check the toner collection coil; replace it if
damaged.
Check RA3. Make sure the cooling fan operates properly.
BLACK SPOTS AT THE LEADING EDGE
- Possible Cause -
• Separation corona wire mismounted
- Action -
Is the separation corona wire properly installed?
Y N
I
Clean the separation corona wire and T/S corona unit.
If the separation corona current is incorrect, clean the separation corona
wire and adjust the separation corona current.
9-13
15 March 1987