(12) Periodically Uneven Image - Minolta Di152 Service Manual

(12) Periodically uneven image

Section Step
Output 1 IU is securely fastened using the dedi-
system cated fixing screws.
2 PH Unit is securely fastened using the
dedicated fixing screws.
3 IU drive mechanism is dirty or damaged.
4 PC Drum surfaces in contact with Ds Col-
lars and drive mechanism are dirty,
scratchy, deformed, or worn.
5 Synchronizing Roller drive mechanism is
dirty, scratchy, deformed, or worn.
6 Fusing Unit drive mechanism is dirty,
scratchy, deformed, or worn.
Input 1 Scanner Motor (M5) is securely fastened
system using the dedicated fixing screws.
2 Scanner Motor (M5) drive mechanism is
dirty or damaged.
3 Timing belt of the scanner drive mecha-
nism is dirty with foreign matter or out of
correct position.
4 Scanner drive mechanism pulley is dirty
with foreign matter, scratchy, deformed,
worn, or damaged.
5 Scanner Drive Cables are wound incor-
rectly.
6 Scanner rails and bushings are dirty with
foreign matter, scratchy, deformed, worn,
or damaged.
7 Scanner moves smoothly.
<Check Procedure>
Gently move the Scanner by hand to
check for smooth operation.
8 CCD Board (copier: PWB-J) connector is
loose.
9 Control Board (copier: PWB-C) connector
PJ1A is loose.
Check
T-59
Result Action
NO • Secure in position.
NO • Secure in position.
YES • Clean or change.
YES • Clean or change.
YES • Clean or change.
YES • Clean or change.
NO • Change Master Board
(copier: PWB-A).
NO • Secure in position.
YES • Clean or change.
YES • Remove foreign mat-
ter or reinstall belt.
YES • Remove foreign mat-
ter or change.
YES • Re-wind Scanner
Drive Cables.
YES • Clean or change.
NO • Lubricate the Scan-
ner rails.
• Reinstall Scanner.
YES • Reconnect.
YES • Reconnect.
NO • Change CCD Unit.
• Change Control
Board (copier: PWB-
C).