Ricoh FT7770 Service Manual page 547

I
Reset the charge corona wire (or unit).
Does the density gradually drop when making copies?
confirm that the development motor turns.)
Y N
I
Is the transfer corona wire (unit) incorrectly installed?
Does the main board output the
signal (CN208-A8 and CN202-A19
Y
Reset the transfer corona wire (unit).
Does LED 1 (RED) of the development motor board light?
Y N
I
Is the fuse (2A) on the development motor board blown?
Y N
I
Replace the development motor board or the development
motor.
Replace the fuse.
Check the development drive mechanism and clean or replace any
defective parts.
N
I
Replace the main board.
proper trigger
drop to ground)?
13-23
30 April, '89
(Also,