Minolta Di620, Manual, Page: 303 / 466

T-88
1155SBT050313A
13) Periodically Uneven Image
Section Step Check Item Result Action
Engine
1 Are the Ds Rolls of the Developing Unit dirty
with foreign matter or scratched? YES Clean or change the rolls.
2 Are the Developing Unit drive gears cracked
or dirty with foreign matter? YES Clean or change the defec-
tive gear.
3 Are the PC Drum drive gears cracked or dirty
with foreign matter, or the belt slack? YES Clean, change or adjust.
4 Is the flywheel secured in position? NO Secure the flywheel in
position.
5 Are the gears cracked or dirty with foreign
matter of the Transport Rollers and Synchro-
nizing Rollers? YES Clean or change the defec-
tive gear.
6 Is the Suction Belt drive gear cracked or dirty
with foreign matter? YES Clean or change the drive
gear.
7 Are the Fusing Unit drive gears cracked or
dirty with foreign matter? YES Clean or change the defec-
tive gear.
8 Is the PH Assy installed securely? YES Change PWB-J or PH
Assy.
NO Install the PH Assy
securely.
9 Is the PC Unit installed all the way into the
copier? NO Slide the PC Unit all the
way into the copier.
10 Do the bearing bushings on the PC Drum
shaft turn smoothly? NO Change the bearing bush-
ings.
IR
1 Are the Scanner Motor drive gears cracked or
dirty with foreign matter, or the belt slack? YES Clean, change or adjust.
2 Is the Scanner Motor secured in position? NO Secure the motor in posi-
tion.
3 Is the Scanner installed securely? NO Install the Scanner
securely.
4 Are the Scanner Drive Cables wound prop-
erly? NO Wind the cables properly.
5 Are the Scanner Rails damaged or dirty with
foreign matter? YES Clean or change the rails.
Memory
1 Select “Tech. Rep. Mode,” “Function,” and
“Image Memory,” in that order. Does “NG”
appear when “Input Image” is then run? YES Change PWB-B.
2 Select “Tech. Rep. Mode,” “Function,” and
“Image Memory,” in that order. Does “NG”
appear when “I.R. Mem. Prn” is then
run?
YES Change PWB-B.
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