Blank Copy - Ricoh FT4430 Service Manual

BLANK COPY

-
Possible Causes
Charge corona wire miscounted or broken
Defective power pack
+ Defective main board
- Action -
Is there a faint image?
Y N
I
Is the charge corona wire (or unit) incorrectly instaIled?
Y N
I
Does the main board output the correct signal to the power pack
(CN206-A22 drops from +24 volts to ground)?
Y
I
Clean the charge corona unit and remove any
P
substances that might cause a leak.
If the
F
Reset the charge corona wire (or unit).
Does the density gradually drop when making copies?
Y N
I
Is the transfer corona wire (unit) incorrectly installed?
Y N
I
Does the main board output the proper T/S trigger signals?
Y
I
Replace the transfer corona power pack.
Reset the transfer corona
Check the development drive mechanism and clean or replace any defective
parts.
N
I
Replace the main board.
problem still exists,
N
I
Replace the main board.
wire (unit).
the charge power pack.
replace
11-15
April '88
16
foreign