Solution; Initial Check Items; Misfeed At Manual Bypass Feed Section - Olivetti MB-502 Service Manual

Field Service Ver. 1.0 Jun. 2008
7.3

Solution

7.3.1

Initial check items

• When a paper misfeed occurs, first perform the following initial check items.
Check item
Does paper meet product specifications?
Is the paper curled, wavy, or damp?
Is a foreign object present along the paper path, or is
the paper path deformed or worn?
Are rolls/rollers dirty, deformed, or worn?
Are the edge guide and trailing edge stop at the cor-
rect position to accommodate the paper?
Are the actuators operating correctly?
7.3.2

Misfeed at manual bypass feed section

A. Detection timing
Type
Detection of misfeed
at manual bypass
feed section
Manual bypass feed
section loop registra-
tion reversing jam
Manual bypass feed
section TOD permit
waiting jam
B. Action
Sensor in front of tim. roller (PS1)
Paper feed clutch (CL5)
Step
1 Initial check items
2 PS1 I/O check, sensor check
3 CL5 operation check
4 PRCB replacement
Y109730-6
• The leading edge of the paper does not block the sensor in front of tim. roller
(PC1) even after the lapse of a given period of time after the paper feed clutch
(CL5) has been energized.
• Rise timing of load for registration is earlier than the one for making the loop
at front of the registration roller at bypass feed.
• For paper fed from the manual bypass, TOD permit continues to be disabled
for a predetermined period of time after the timing of TOD output.
Relevant electrical parts
Action
Service Manual
Action
Replace paper.
Replace paper.
Instruct the user on the correct paper storage
procedures.
Clean the paper path and replace if necessary.
Clean or replace the defective roll/roller.
Set as necessary.
Correct or replace the defective actuator.
Description
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
PRCB CN1-3 (ON)
PRCB CN11-2 (ON)
—
7. Jam display
Location
(Electrical
components)
—
d-Color MF201
C to D-19
MB-502
D-2 to 3
—
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