Page 1
MB-502
Option Printer
SERVICE MANUAL
Code Y109730-6
Page 2
PUBLICATION ISSUED BY:
Olivetti S.p.A.
77, Via Jervis - 10015 Ivrea (TO)
Italy
Copyright © 2008, Olivetti
All rights reserved
Page 3
Revision history
After publication of this service manual, the parts and mechanism may be subject to change for
improvement of their performance.
Therefore, the descriptions given in this service manual may not coincide with the actual machine.
When any change has been made to the descriptions in the service manual, a revised version will be
issued with a revision mark added as required.
Revision mark:
• To indicate clearly a section revised, is shown at the left margin of the revised section.
The number inside represents the number of times the revision has been made.
• To indicate clearly a page that contains the revision, is shown near the page number of the
corresponding page.
The number inside represents the number of times the revision has been made.
NOTE
Revision marks shown in a page are restricted only to the latest ones with the old ones deleted.
• When a page revised in Ver. 2.0 has been changed in Ver. 3.0:
The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.
• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0:
The revision marks for Ver. 2.0 are left as they are.
1
1
1
1
Page 4
MB-502Outline
MaintenanceAdjustment / Setting
Troubleshooting
Field Service Ver. 1.0 Jun. 2008
CONTENTS
MB-502
Outline
1. Product specifications ............................................................................................. 1
Maintenance
2. Other ....................................................................................................................... 3
2.1 Disassembly/Adjustment prohibited items ............................................................ 3
2.2 Disassembly/Assembly/Cleaning list (other parts)................................................ 4
2.2.1 Disassembly/Assembly parts list................................................................... 4
2.2.2 Cleaning parts list ......................................................................................... 4
2.3 Disassembly/Assembly procedure........................................................................ 4
2.3.1 Manual bypass tray feed roller ...................................................................... 4
2.3.2 Manual bypass tray separation roller ............................................................ 6
2.3.3 Manual bypass tray left cover / Manual bypass tray right cover /
Manual bypass tray upper cover ................................................................... 7
2.3.4 Manual bypass tray unit ................................................................................ 8
2.4 Cleaning procedure ............................................................................................ 10
2.4.1 Manual bypass tray feed roller .................................................................... 10
2.4.2 Manual bypass tray separation roller .......................................................... 10
Adjustment/Setting
3. How to use the adjustment section ....................................................................... 11
4. State Confirmation ................................................................................................ 12
4.1 Check procedure ................................................................................................ 12
4.2 Sensor check screen .......................................................................................... 12
4.3 Sensor check list................................................................................................. 12
5. Machine Adjustment.............................................................................................. 13
5.1 Printer Area ........................................................................................................ 13
5.1.1 Leading Edge Adjustment ........................................................................... 13
5.1.2 Centering .................................................................................................... 14
5.1.3 Centering (Duplex 2nd side) ....................................................................... 16
5.2 Manual Bypass Tray Adjustment......................................................................... 17
6. Mechanical adjustment ......................................................................................... 19
6.1 Adjustment of the bypass paper size unit ........................................................... 19
Y109730-6 Service Manual i
Page 5
MB-502
Outline
MaintenanceAdjustment / Setting
Troubleshooting
Field Service Ver. 1.0 Jun. 2008
Troubleshooting
7. Jam display ........................................................................................................... 21
7.1 Misfeed display................................................................................................... 21
7.1.1 Misfeed display resetting procedure ........................................................... 21
7.2 Sensor layout...................................................................................................... 22
7.3 Solution .............................................................................................................. 23
7.3.1 Initial check items ....................................................................................... 23
7.3.2 Misfeed at manual bypass feed section...................................................... 23
8. Trouble code ......................................................................................................... 24
8.1 Trouble code ....................................................................................................... 24
8.2 Solution .............................................................................................................. 24
8.2.1 C0211: Manual feed up/down abnormality ................................................. 24
ii Service Manual Y109730-6
Page 6
Field Service Ver. 1.0 Jun. 2008 1. Product specifications
MB-502Outline
Outline
1. Product specifications
A. Type
B. Paper
*1: Image is not guaranteed when thick paper 3 is used
*2: Monochrome print only.
Name Multiple Bypass Tray
Installation Screwed to the copier
Registration Center
Type Paper source (maximum tray capacity)
Copy paper type Plain paper
(60 to 90 g/m
2
, 16 to 24 lb)
100 sheets
Thick paper 1
(91 to 150 g/m
2
, 24.2 to 40 lb)
20 sheets
Thick paper 2
(151 to 209 g/m
2
,
40.2 to 55.6 lb)
Thick paper 3
(210 to 256 g/m
2
,
55.9 to 68.1 lb) *1
OHP film
(crosswise feeding only) *2
Label sheets
Envelopes 10 sheets
Postcards
Translucent paper
Paper size Metric area A6S, B6S, A5, A5S, B5, B5S, A4, A4S, A3,
A3 Wide, FLS
8-
1
/2 x 11, 8-1/2 x 14, 11 x 17
Inch area B6S, A4, A3, FLS
5-
1
/2 x 8-1/2, 5-1/2 x 8-1/2S, 7-1/4 x 10-1/2,
7-
1
/4 x 10-1/2S, 8-1/2 x 11, 8-1/2 x 11S,
8-
1
/2 x 14, 11 x 17, 12 x 18
Copy paper
dimensions
Width 90 to 311.1 mm
3.6 to 12.3 inch
Length 139.7 to 432 mm
5.5 to 17 inch
Y109730-6 Service Manual 1
Page 7
1. Product specifications Field Service Ver. 1.0 Jun. 2008
MB-502
Outline
C. Machine specifications
D. Operating environment
Conforms to the operating environment of the main body.
NOTE
• These specifications are subject to change without notice.
Power Requirements
DC 24 V
± 10 % (supplied from the main body)
DC 5 V
± 5 %
Max. Power
Consumption
27 W or less
Dimensions 472 mm (W) × 456 mm (D) × 102 mm (H)
18.6 inch (W) × 18.0 inch (D) × 4.0 inch (H)
Weight 2.9 kg (6.4 lb)
2 Service Manual Y109730-6
Page 8
Field Service Ver. 1.0 Jun. 2008 2. Other
MB-502
Maintenance
Maintenance
2. Other
2.1 Disassembly/Adjustment prohibited items
A. Paint-locked screws
NOTE
• To prevent loose screws, a screw lock in blue or green series color is applied to
the screws.
• The screw lock is applied to the screws that may get loose due to the vibrations
and loads created by the use of machine or due to the vibrations created during
transportation.
• If the screw lock coated screws are loosened or removed, be sure to apply a screw
lock after the screws are tightened.
B. Red-painted screws
NOTE
• The screws which are difficult to be adjusted in the field are painted in red in order
to prevent them from being removed by mistake.
• Do not remove or loosen any of the red-painted screws in the field. It should also
be noted that, when two or more screws are used for a single part, only one representative screw may be marked with the red paint.
C. Variable resistors on board
NOTE
• Do not turn the variable resistors on boards for which no adjusting instructions
are given in Adjustment/Setting.
D. Removal of PWBs
CAUTION
• When removing a circuit board or other electrical component, refer to “Handling of
PWBs” and follow the corresponding removal procedures.
• The removal procedures given in the following omit the removal of connectors and
screws securing the circuit board support or circuit board.
• Where it is absolutely necessary to touch the ICs and other electrical components
on the board, be sure to ground your body.
Y109730-6 Service Manual 3
Page 9
2. Other Field Service Ver. 1.0 Jun. 2008
MB-502
Maintenance
2.2 Disassembly/Assembly/Cleaning list (other parts)
2.2.1 Disassembly/Assembly parts list
2.2.2 Cleaning parts list
2.3 Disassembly/Assembly procedure
2.3.1 Manual bypass tray feed roller
1. Remove the manual bypass tray unit.
See P.8
2. Remove the E-ring [1], and remove
the paper feed clutch [2].
No. Section Part name Ref. page
1
Rollers
Manual bypass tray feed roller P. 4
2 Manual bypass tray separation roller P. 6
3
Exterior parts
Manual bypass tray left cover P. 7
4 Manual bypass tray right cover P. 7
5 Manual bypass tray upper cover P. 7
6 Unit Manual bypass tray unit P. 8
No. Section Part name Ref. page
1
Feed section
Manual bypass tray feed roller P. 1 0
2 Manual bypass tray separation roller P. 1 0
A0EPF2C001DA
[2]
[1]
4 Service Manual Y109730-6
Page 10
Field Service Ver. 1.0 Jun. 2008 2. Other
MB-502
Maintenance
3. Remove the gear [1].
4. Snap off the C-clip [1] and slide the
manual bypass feed roller [2] in the
direction of the arrow.
5. Remove two C-lings [1] and the
bearingޓ[2].
A0EPF2C002DA
[1]
A0EPF2C003DA
[1]
[2]
A0EPF2C004DA
[1]
[2]
Y109730-6 Service Manual 5
Page 11
2. Other Field Service Ver. 1.0 Jun. 2008
MB-502
Maintenance
6. Remove the manual bypass tray feed
roller [1].
7. To reinstall, reverse the order of removal.
2.3.2 Manual bypass tray separation roller
1. Remove the manual bypass tray unit.
See P.8
2. Remove the screw [1], and remove
the ground terminal [2].
3. Remove the screw [1], and remove
the manual bypass tray separation
roller assy [2].
A0EPF2C005DA
[1]
A0EPF2C006DA
[1]
[2]
A0EPF2C007DA
[1]
[2]
6 Service Manual Y109730-6
Page 12
Field Service Ver. 1.0 Jun. 2008 2. Other
MB-502
Maintenance
4. Snap off the C-ling [1], and remove
the spring [2] and the guide plate [3].
Remove the manual bypass tray
separation roller [4].
5. To reinstall, reverse the order of removal.
2.3.3 Manual bypass tray left cover / Manual bypass tray right cover / Manual
bypass tray upper cover
1. Unhook three tabs [1], and remove the manual bypass tray left cover [2].
2. Remove the screw [3], and remove the manual bypass tray right cover [4].
3. Remove two screws [5] and unhook two tabs [6], and remove the manual bypass tray
upper cover [7].
A0EPF2C008DA
[3]
[1] [4]
[2]
A0EPF2C009DA
[5]
[6] [1] [2]
[6]
[3]
[4]
[7]
Y109730-6 Service Manual 7
Page 13
2. Other Field Service Ver. 1.0 Jun. 2008
MB-502
Maintenance
2.3.4 Manual bypass tray unit
1. Open the right door.
2. Remove four screws [1], and remove
the right rear cover [2] of the main
body.
3. Close the right door.
4. Remove the manual bypass tray right cover and manual bypass tray left cover.
See P.7
5. Disconnect two connectors [1].
6. Pull off the lever [1] and remove the
guide [2].
A0EPF2C010DA
[1]
[1] [2]
[1]
A0EPF2C011DA
[1]
A0EPF2C012DA
[1]
[2]
8 Service Manual Y109730-6
Page 14
Field Service Ver. 1.0 Jun. 2008 2. Other
MB-502
Maintenance
7. Remove four screws [1].
8. Loosen the screw [1], and remove
the manual bypass tray unit [2].
NOTE
• When installing the multi bypass
unit, fit the position of dowel shown
in the left illustration.
A0EPF2C013DA
[1]
[1]
A0EPF2C014DA
[1]
[2]
A0EPF2C015DA
Y109730-6 Service Manual 9
Page 15
2. Other Field Service Ver. 1.0 Jun. 2008
MB-502
Maintenance
2.4 Cleaning procedure
NOTE
• The alcohol described in the cleaning procedure represents the isopropyl alcohol.
2.4.1 Manual bypass tray feed roller
1. Remove the manual bypass tray unit.
See P.8
2. Using a cleaning pad dampened with
alcohol, wipe the manual bypass tray
feed roller [1] clean of dirt.
2.4.2 Manual bypass tray separation roller
1. Remove the manual bypass tray unit.
See P.8
2. Remove the manual bypass tray separation roller assy.
See the procedures 1 to 3 in P.6 “Manual bypass tray separation roller.”
3. Using a cleaning pad dampened with
alcohol, wipe the manual bypass tray
separation roller [1] clean of dirt.
A0EPF2C016DA
[1]
A02EPF2C017DA
[1]
10 Service Manual Y109730-6
Page 16
Field Service Ver. 1.0 Jun. 2008 3. How to use the adjustment section
MB-502
Adjustment / Setting
Adjustment/Setting
3. How to use the adjustment section
• “Adjustment/Setting” contains detailed information on the adjustment items and procedures for this machine.
• Throughout this “Adjustment/Setting,” the default settings are indicated by “ ”.
Advance checks
Before attempting to solve the customer problem, the following advance checks must be
made. Check to see if:
• The power supply voltage meets the specifications.
• The power supply is properly grounded.
• The machine shares the power supply with any other machine that draws large current
intermittently (e.g., elevator and air conditioner that generate electric noise).
• The installation site is environmentally appropriate: high temperature, high humidity,
direct sunlight, ventilation, etc.; levelness of the installation site.
• The original has a problem that may cause a defective image.
• The density is properly selected.
• The original glass, slit glass, or related part is dirty.
• Correct paper is being used for printing.
• The units, parts, and supplies used for printing (developer, PC drum, etc.) are properly
replenished and replaced when they reach the end of their useful service life.
• Toner is not running out.
CAUTION
• Be sure to unplug the power cord of the machine before starting the service job
procedures.
• If it is unavoidably necessary to service the machine with its power turned ON, use
utmost care not to be caught in the scanner cables or gears of the exposure unit.
• Special care should be used when handling the fusing unit which can be
extremely hot.
• The developing unit has a strong magnetic field. Keep watches and measuring
instruments away from it.
• Take care not to damage the PC drum with a tool or similar device.
• Do not touch IC pins with bare hands.
Y109730-6 Service Manual 11
Page 17
4. State Confirmation Field Service Ver. 1.0 Jun. 2008
MB-502
Adjustment / Setting
4. State Confirmation
4.1 Check procedure
A. Procedure
1. Call the Service Mode to the screen.
See P.146 of the main body service manual.
2. Touch [State Confirmation].
3. Touch [Sensor Check (Printer)].
4. Touch [Fwd].
4.2 Sensor check screen
• This is only typical screen which may be different from what are shown on each individ-
ual main body.
4.3 Sensor check list
A0EPF3E512DA
Symbol Panel display Part/Signal name
Operation characteris-
tics/Panel display
10
PS20
Bypass Tray
Multi FD size 1 FD size sensor/1 ON OFF
PS21 Multi FD size 2 FD size sensor/2 ON OFF
PS22 Multi FD size 3 FD size sensor/3 ON OFF
PS14
Lift-Up Position Sensor
Lift-up position sensor
Raised
Position
Not raised
PS13 Paper Empty Paper empty sensor
Paper not
present
Paper
present
12 Service Manual Y109730-6
Page 18
Field Service Ver. 1.0 Jun. 2008 5. Machine Adjustment
MB-502
Adjustment / Setting
5. Machine Adjustment
5.1 Printer Area
5.1.1 Leading Edge Adjustment
NOTE
• Make this adjustment after any of the following procedures has been performed.
When the PH unit has been replaced.
When the image on the print is offset in the sub scan direction.
A faint image occurs on the leading edge of the image.
1. Call the Service Mode to the screen.
See P.146 of the main body service manual.
2. Touch [Machine Adjustment] o [Printer Area] o [Leading Edge Adjustment].
3. Touch [Plain].
4. Press the Start key to let the
machine produce a test print.
5. Touch [OK].
6. Measure the width of printed refer-
ence line A.
Specification: 3.0 mm
± 1.0 mm
7. If the measured width A falls outside
the specified range, enter the correction value using the [ ] or [ ]
key.
8. Produce another test print and check to see if width A falls within the specified range.
9. Following the same procedure, adjust for transparency, thick 1 to 3, and envelope.
10. Touch [OK].
11. Touch [OK] on the Service Mode screen.
12. Turn OFF the main power switch, then wait for 10 sec. or more and turn ON the main
power switch.
A0EPF3E513DA
A0EPF3C502DA
A
Y109730-6 Service Manual 13
Page 19
5. Machine Adjustment Field Service Ver. 1.0 Jun. 2008
MB-502
Adjustment / Setting
5.1.2 Centering
NOTE
• Make this adjustment after any of the following procedures has been performed.
When the PH unit has been replaced.
When the image on the print is offset in the main scan direction.
1. Call the Service Mode to the screen.
See P.146 of the main body service manual.
2. Touch [Machine Adjustment] o [Printer Area] o [Centering].
3. Touch [Bypass Tray].
4. Press the Start key to let the
machine produce a test print.
5. Touch [OK].
6. Measure the width of printed refer-
ence line A.
Specification: 3.0 mm
± 1.0 mm
7. If the measured width A falls outside
the specified range, enter the correction value using the [ ] or [ ]
key.
8. Produce another test print and check to see if width A falls within the specified range.
NOTE
• If the use of the [ ] or [ ] key does not allow the measurement to fall within
the specified range, perform the following steps.
A0EPF3E517DA
4348fs3509c0
A
14 Service Manual Y109730-6
Page 20
Field Service Ver. 1.0 Jun. 2008 5. Machine Adjustment
MB-502
Adjustment / Setting
9. Loosen two screws [1].
10. Watching the gradations [1] provided
in the multi bypass tray, move the
edge guide [2] position.
• If width A is greater than the specified
value, move the edge guide toward the
right.
• If width A is smaller than the specified
value, move the edge guide toward the
left.
11. Perform another test print and check the reference deviation.
12. Repeat the adjustment until the reference line falls within the specified range.
13. Tighten the adjustment screw.
14. Touch [OK].
15. Touch [OK] on the Service Mode screen.
16. Turn OFF the main power switch, then wait for 10 sec. or more and turn ON the main
power switch.
A0EPF3C506DA
[1]
A0EPF3C507DA
[1]
[2]
Y109730-6 Service Manual 15
Page 21
5. Machine Adjustment Field Service Ver. 1.0 Jun. 2008
MB-502
Adjustment / Setting
5.1.3 Centering (Duplex 2nd side)
NOTE
• Make this adjustment after any of the following procedures has been performed.
When the PH unit has been replaced.
The image on the backside of the 2-sided copy deviates in the main scan direction.
1. Call the Service Mode to the screen.
See P.146 of the main body service manual.
2. Touch [Machine Adjustment] o [Printer Area] o [Centering (Duplex 2nd side)].
3. Touch [Bypass Tray].
4. Press the Start key to let the
machine produce a test print.
5. Touch [OK].
6. Measure the width of printed refer-
ence line A.
Specification: 3.0 mm
± 2.0 mm
7. If the measured width A falls outside
the specified range, enter the correction value using the [ ] or [ ]
key.
8. Produce another test print and check to see if width A falls within the specified range.
9. Touch [OK].
10. Touch [OK] on the Service Mode screen.
11. Turn OFF the main power switch, then wait for 10 sec. or more and turn ON the main
power switch.
A0EPF3E518DA
A
4061F3C809DA
16 Service Manual Y109730-6
Page 22
Field Service Ver. 1.0 Jun. 2008 5. Machine Adjustment
MB-502
Adjustment / Setting
5.2 Manual Bypass Tray Adjustment
NOTE
Make this adjustment after any of the following procedures has been performed.
Upon setup of the Manual bypass tray unit.
Use when the manual bypass paper size unit of the manual bypass guide has been
changed.
Use when a false paper size is displayed when the manual bypass is used.
1. Call the Service Mode to the screen.
See P.146 of the main body service manual.
2. Touch [Machine Adjustment] o [Manual Bypass Tray Adjustment].
3. Touch [Max. Width].
4. Place the adjustment sheet (width:
297 mm) [1] on the manual bypass
tray as illustrated.
5. Press the Start key.
6. Check that “OK” appears beside
[Max. Width].
NOTE
• Make the adjustment again if the
results are “NG”.
A0EPF3C503DA
[1]
A0EPF3E515DA
Y109730-6 Service Manual 17
Page 23
5. Machine Adjustment Field Service Ver. 1.0 Jun. 2008
MB-502
Adjustment / Setting
7. Touch [Min. Width].
8. Place the adjustment sheet (width:
100 mm) [1] on the manual bypass
tray as illustrated.
9. Press the Start key.
10. Check that “OK” appears beside
[Min. Width].
NOTE
• Make the adjustment again if the
results are “NG”.
11. Press the Start key.
12. Touch [OK].
13. Touch [OK] on the Service Mode screen.
14. Turn OFF the main power switch, then wait for 10 sec. or more and turn ON the main
power switch.
A0EPF3C504DA
[1]
A0EPF3E516DA
18 Service Manual Y109730-6
Page 24
Field Service Ver. 1.0 Jun. 2008 6. Mechanical adjustment
MB-502
Adjustment / Setting
6. Mechanical adjustment
6.1 Adjustment of the bypass paper size unit
NOTE
• This adjustment must be made in the following case:
The bypass paper size unit has been removed.
1. Install the gear so that the protrusion
of the gear [1] and the mark [3] on
the bypass guide rack gear [2] are
aligned in a straight line.
2. Install the bypass unit cover so that
part A (edge) [2] of the rack gear [1]
for the bypass paper size unit and
part B [3] of the bypass unit cover
are aligned in a straight line.
[1]
[3]
[3]
[2]
[2]
4038F3C003DA
[3]
4038F3C004DB
[1]
[2]
Y109730-6 Service Manual 19
Page 25
6. Mechanical adjustment Field Service Ver. 1.0 Jun. 2008
MB-502
Adjustment / Setting
3. When the bypass paper size unit
base is mounted, align the lever
position of the bypass paper size unit
with the tab at the center in a straight
line.
4. After the bypass paper size unit base has been mounted, check that the lever of the
bypass paper size unit moves smoothly in a manner operatively connected to the
bypass guide.
5. Call the Service Mode to the screen and select [Machine] o [Manual Bypass Tray
Adjustment]. Then, carry out manual bypass tray adjustment.
See P.17
4038F3C512DA
20 Service Manual Y109730-6
Page 26
Field Service Ver. 1.0 Jun. 2008 7. Jam display
MB-502
Troubleshooting
Troubleshooting
7. Jam display
7.1 Misfeed display
• When misfeed occurs, message, misfeed location “Blinking” and paper location “Lighting” are displayed on the touch panel of the main body.
7.1.1 Misfeed display resetting procedure
• Open the corresponding door, clear the sheet of paper misfed, and close the door.
No. Code Misfeed location Misfeed access location Action
[1] 1001 Misfeed at manual bypass feed section Right door P. 2 3
A0EPF4C500DA
[1]
Y109730-6 Service Manual 21
Page 27
7. Jam display Field Service Ver. 1.0 Jun. 2008
MB-502
Troubleshooting
7.2 Sensor layout
[1] Sensor in front of tim. roller (PS1)
A0EPF4C501DA
[1]
22 Service Manual Y109730-6
Page 28
Field Service Ver. 1.0 Jun. 2008 7. Jam display
MB-502
Troubleshooting
7.3 Solution
7.3.1 Initial check items
• When a paper misfeed occurs, first perform the following initial check items.
7.3.2 Misfeed at manual bypass feed section
A. Detection timing
B. Action
Check item Action
Does paper meet product specifications? Replace paper.
Is the paper curled, wavy, or damp?
Replace paper.
Instruct the user on the correct paper storage
procedures.
Is a foreign object present along the paper path, or is
the paper path deformed or worn?
Clean the paper path and replace if necessary.
Are rolls/rollers dirty, deformed, or worn? Clean or replace the defective roll/roller.
Are the edge guide and trailing edge stop at the correct position to accommodate the paper?
Set as necessary.
Are the actuators operating correctly? Correct or replace the defective actuator.
Type Description
Detection of misfeed
at manual bypass
feed section
• 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.
Manual bypass feed
section loop registration reversing jam
• Rise timing of load for registration is earlier than the one for making the loop
at front of the registration roller at bypass feed.
Manual bypass feed
section TOD permit
waiting jam
• 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
Sensor in front of tim. roller (PS1)
Paper feed clutch (CL5)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location
(Electrical
components)
1 Initial check items — —
2 PS1 I/O check, sensor check PRCB CN1-3 (ON)
d-Color MF201
C to D-19
3 CL5 operation check PRCB CN11-2 (ON)
MB-502
D-2 to 3
4 PRCB replacement — —
Y109730-6 Service Manual 23
Page 29
8. Trouble code Field Service Ver. 1.0 Jun. 2008
MB-502
Troubleshooting
8. Trouble code
8.1 Trouble code
• The main unit’s CPU performs a self-diagnostics function that, on detecting a malfunction, gives the corresponding malfunction code on the touch panel.
• Open and close the front door, or turn OFF the main power switch. Then, wait for 10 sec.
or more and turn ON the main power switch to reset the malfunction display.
8.2 Solution
8.2.1 C0211: Manual feed up/down abnormality
Code Item Description
C0211
Manual feed up/down abnormality
• The lift-up position sensor (PS14) is not unblocked
even when the transport motor has turned for a given
number of pulses after the sequence to move the paper
lifting plate from the standby position to the feed position was started.
• The lift-up position sensor (PS14) is not blocked even
when the transport motor has turned for a given number of pulses after the sequence to move the paper lifting plate from the feed position to the standby position
was started.
Relevant electrical parts
Transport motor (M1)
Manual pick-up solenoid (SD2)
Lift-up position sensor (PS14)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location
(Electrical
components)
1
Check the M1 connector for proper connection and correct as necessary.
——
2
Check the connector of M1 for proper
drive coupling and correct as necessary.
——
3 PS14 I/O check, sensor check PRCB CN10-15 (ON) MB-502 D-5
4 SD2 operation check PRCB CN11-4 (ON) MB-502 D-3
5 M1 operation check PRCB CN-27-11 to 15
d-Color MF201
C to D-23
6 SD2 replacement — —
7 M1 replacement — —
8 PRCB replacement — —
24 Service Manual Y109730-6
Page 30
UPDATING STATUS
DATE UPDATED PAGES PAGES CODE
09/2008 1ST EDITION 30 Y109730-6
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