Ricoh FT4430 Service Manual page 316

16 April '88
3. Dirty Background Around White Spots
- Possible Causes -
+ Condensation on the drum due to rapid temperature change. This
phenomenon may occur early on winter mornings.
- Action -
The problem should disappear after about 20 copies.
drum conditioning.
HAT IMAGE
- Possible Causes -
Defective quenching lamp
Charge corona wire miscounted
+ Incorrect
corona
+ Old developer
- Action -
Does the quenching lamp turn on?
Y N
I
I
Does CN203-8 drop from +24 volts to ground?
I I I
Y N
I
Replace the quenching lamp.
Is the charge corona wire properly installed?
Y N
I
Install the charge corona wire correctly.
F
Is the charge corona current correct?
Y N
I I
Adjust the charge corona current.
Replace the developer.
c u r r e n t
If
11-2
it does not, perform