Ricoh FAX5600L Service manual

PREPARED BY: H.Yokoyama
CHECKED BY: S.Hamano FROM: 2nd T.S. Section
CLASSIFICATION:
Action Required Revision of service manual
Troubleshooting Information only
Retrofit Information Other
MODEL:
FAX5600L
Following pages have been corrected.
Page: 2-18, 19
6-1~28
A floppy disk with corrected pages except page 2-18 and 19, is enclosed.
Technical Bulletin No.CGO-001
SUBJECT: Service Manual Correction DATE:
Sep. 14, 1994

6. TROUBLESHOOTING
6.1. COPY QUALITY TROUBLESHOOTING
If there is a copy quality problem that cannot be solved easily, try using the
following troubleshooting flow chart, while referring to the point-to-point dia-
gram. The flow chart may not be exhaustive, but it may help you to find the
problem.
Symptom: Blank copies
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 15. Go to step 2.
2. Is the master installed cor-
rectly? Go to step 3. Install it properly.
3. Does the master rotate
correctly during the copy
cycle?
Go to step 4. Correct any problems with
the mechanism.
4. Is the master grounded
properly? Go to step 5. Check the grounding wire, terminals and plates. Clean
or replace if necessary.
5. Are any of the laser opti-
cal components broken,
blocked, or misaligned?
Correct the problem. Go to step 6.
6. Are the transfer corona
unit and wire correctly in-
stalled?
Check the connections
between the corona wire
and the FCU. Go to step 7.
Correct the problem.
7. Does the FCU output the
power and corona trigger
signal to the power pack?
Clean the transfer corona
unit. Go to step 8. Change the FCU.
8. Does the problem go
away if you change the
power pack?
Finished. Go to step 9.
9. Does the development
bias terminal reach the
correct voltage
(about -530 Vdc)?
Go to step 12. Go to step 10. Do not adjust
the variable resistors on the
power pack.
10. Does the FCU output the
power and bias trigger
signal to the power pack?
Clean the area around the
bias terminal. Go to step 11. Change the FCU.
11. Does the problem go
away if you change the
power pack?
Finished. Clean the development
roller. Go to step 12.
12. Does the development
roller attract toner? Check all LDDR- FCU - interlock switch
connections. Go to step 13.
Replace the roller.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-1

Symptom: Blank copies
Check Action if Yes Action if No
13. Is the laser diode unit
screwed in properly? Go to step 14. Install it properly.
14. Do the interlock switches
close when the cover is
closed, and do they pass
power to the LDDR?
Change the LD unit, FCU,
master unit, or varistor. Change them.
15. Check the FCU - SBU
connection. Is there a
signal from the SBU
(AVIDEO)?
Go to step 16. Light the xenon lamp. Align
the SBU (see section 5-2-9);
replace the FCU or SBU if
impossible.
16. Does the problem only
occur when printing from
memory?
Check the connection to the
memory card. Change the
memory card, FCU, or MBU.
Go to step 17.
17. If the problem only occurs during communication, check the FCU - NCU - line
connections. Check for severe line problems. If the problem cannot be found, replace
the NCU or FCU.
Symptom: Black copies
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 10. Go to step 2.
2. Are the charge corona
unit and wire correctly
installed?
Check the connections
between the corona wire
and the FCU. Go to step 3.
Correct the problem.
3. Does the FCU output the
power and corona trigger
signal to the power pack?
Clean the charge corona
unit. Go to step 4. Change the FCU.
4. Does the problem go
away if you change the
power pack?
Finished. Go to step 5.
5. Is the varistor shorted? Change the varistor. Go to step 6.
6. Is the master grounded
properly? Go to step 7. Check the grounding wire, terminal and plate. Clean or
replace if necessary.
7. Does the development
bias terminal reach the
correct voltage
(about -530 Vdc)?
Go to step 10. Go to step 8. Do not adjust
the variable resistors on the
power pack.
8. Does the FCU output the
power and bias trigger
signal to the power pack?
Clean the area around the
bias terminal. Go to step 9. Change the FCU.
9. Does the problem go
away if you change the
power pack?
The laser beam may always
be on. Change the FCU or
LD unit.
Clean the development
roller. Go to step 10.
10. Check the connections
from the FCU to the
xenon lamp. Does the
lamp work?
Go to step 12. Go to step 11.
1st August, 1994 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-2

Symptom: Black copies
Check Action if Yes Action if No
11. Does the FCU output the
power and drive signals
to the lamp driver?
Change the xenon lamp or
the drive board. Change the FCU.
12. Check the FCU - SBU
connection. Is there a
signal from the SBU
(AVIDEO)?
Go to step 13. Light the xenon lamp. Align
the SBU (see section 5-2-9);
replace the FCU or SBU if
impossible.
13. Does the problem only
occur when printing from
memory?
Check the connection to the
memory card. Change the
memory card, FCU, or MBU.
Go to step 14.
14. If the problem only occurs during communication, check the FCU - NCU - line
connections. Check for severe line problems. If the problem cannot be found, replace
the NCU or FCU.
Symptom: Faint copy
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 7. Go to step 2.
2. Try the following steps (a to f) to solve the problem. If they fail, check the connections
through the machine between the FCU, toner near-end sensor, and toner supply motor.
Then go to step 3.
a) Replace the master.
b) If the Add Toner indicator is lit, add toner.
c) Clean or replace the corona wires.
d) Clean the toner metering blade (soft cloth and alcohol).
e) If the copy paper is damp, replace it.
f) If the toner contains dirt or paper particles, replace it.
3. Has the toner run out
even though the Add
Toner indicator is not lit?
Check the sensor actuator
mechanism. Change the
sensor if necessary.
Go to step 4.
4. Does the toner supply
motor turn just after the
main power is switched
on?
Go to step 5. Change the toner supply
motor or the FCU.
5. Work through steps 4 to 12 of "Blank copies".
6. Change the varistor, FCU, or LD unit .
7. Clean the exposure glass and the white plate in the scanner.
Symptom: Faint copy at leading or trailing edge
Check Action if Yes Action if No
The paper in the cassette may be curled at the leading edge
The paper in the cassette may be damp.
The paper may be too thick or too thin.
Instruct the user how to store paper, and instruct them to use recommended types and
weights of copy paper.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-3

Symptom: Dirty background all over the copy
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 13. Go to step 2.
2. Try the following steps (a to f) to solve the problem. If they fail, go to step 3.
a) Clean the quenching lamp and cleaning blade.
b) Tighten the toner metering blade securing screws (see section 5-6-2).
c) If the toner contains dust or paper particles, change the CTM.
d) Clean the area around the bias terminal of the development unit.
e) If the pattern is constant down the page, clean the laser optics with a blower brush, or
clean or replace the corona wires.
3. Is the master grounded
properly? Go to step 4. Check the grounding wire, terminals and plates. Clean
or replace if necessary.
4. Is the varistor shorted? Change the varistor. Go to step 5.
5. Does the development
bias terminal give a
constant correct voltage
(about -530 Vdc)?
Go to step 8. Go to step 6. Do not adjust
the variable resistors on the
power pack.
6. Does the FCU output
constant power and bias
trigger signals to the
power pack?
Clean the area around the
bias terminal. Go to step 7. Change the FCU.
7. Does the problem go
away if you change the
power pack?
Finished. Go to step 8.
8. Are the charge corona
unit and wire correctly
installed?
Check the connections
between the corona wire
and the FCU. Go to step 9.
Correct the problem.
9. Does the FCU output
constant power and
corona trigger signals to
the power pack?
Clean the charge corona
unit. Go to step 10. Change the FCU.
10. Does the problem go
away if you change the
power pack?
Finished. Go to step 11.
11. Does the quenching lamp
operate correctly? Go to step 13. Check the connections between the FCU and lamp.
Go to step 12.
12. Does the FCU send
constant power and drive
signals to the lamp?
Replace the quenching
lamp. Replace the FCU.
13. Try replacing the master unit.
14. Clean the scanner optics, exposure glass, and white plate.
Check the SBU white waveform for peaks, dropouts, or noise in the signal. Change the
SBU or FCU if such wave patterns are present.
Adjust the RAM addresses containing contrast threshold levels.
1st August, 1994 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-4

Symptom: Stray toner flecks fused into the copy
Check Action if Yes Action if No
1. Clean the inside of the machine, especially around the development and transfer unit.
Clean the cleaning blade.
Clean the rollers in the fusing unit.
2. Replace the master unit or CTM.
Symptom: Previous copy shows faintly
Check Action if Yes Action if No
1. Does the quenching lamp
operate correctly? Clean or replace the master. Check the connections between the FCU and lamp.
Go to step 2.
2. Does the FCU send
constant power and drive
signals to the lamp?
Replace the quenching
lamp. Replace the FCU.
Symptom: Density changes gradually across the printout
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 3. Go to step 2.
2. Check that the charge corona wire is clean and that it is installed correctly.
Check that none of the laser optic components are out of position.
Check that toner is being distributed evenly across the development unit. If it is not,
change the CTM, development unit, or toner supply motor.
Try changing the master unit, quenching lamp, or the charge corona wire.
3. The xenon lamp may need to be changed.
4. Is the SBU scan line
alignment is correct (see
section 5-2-9)?
Change the FCU. Change the SBU.
Symptom: Uneven density in vertical bands
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 3. Go to step 2.
2. Clean or change the charge corona wire.
Clean or change the quenching lamp.
Clean the laser optic components with a blower brush or dry cloth.
Check that toner is being distributed evenly across the development unit. If it is not,
change the CTM, development unit, or toner supply motor.
3. Clean the exposure glass, white plate, and scanner optics.
Change the xenon lamp, especially if bands appear on the sides of copies made using
copy mode.
4. Are there any bands in
the SBU white waveform
(see section 5-2-9)?
Change the SBU. Change the FCU.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-5

Symptom: Uneven density in horizontal bands
Check Action if Yes Action if No
1. Does the xenon lamp
flicker? Change the lamp. Go to step 2.
2. Is there a clear boundary
between the bands? Clean the charge and transfer corona units (there
could be a leak, so check if
any Auto Service Calls were
made).
Clean the development unit,
its bearings, and drive
mechanism. or replace the
master unit and/or
development unit.
Symptom: Thin vertical white lines
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 5. Go to step 2.
2. Clean the grid plate, toner metering blade, and laser optics.
Clean or replace the corona wires.
Add toner if the toner supply is getting low.
Check for foreign objects around the master that could cause leakage of charge form
the belt.
3. Is the surface of the hot
roller scratched? Replace the component that is damaging the hot roller,
then replace the hot roller.
If the hot roller strippers are
badly stained with toner,
replace them, and the
thermistor (or FCU or PSU).
Go to step 4.
4. Is the master scratched? Replace the component that
is doing the damage, then
replace the master.
Finished
5. Clean the white pressure plate above the exposure glass.
6. Are there any peaks in the
SBU white waveform
(see section 5-2-9)?
Change the SBU. Change the FCU.
Symptom: Fuzzy vertical white lines
Check Action if Yes Action if No
Clean or replace the corona wires.
Symptom: Wavy vertical black lines or bands
Check Action if Yes Action if No
The cleaning blade or toner metering blade may be dirty or damaged.
Replace the hexagonal mirror motor.
1st August, 1994 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-6

Symptom: Vertical dotted lines
Check Action if Yes Action if No
1. If the master is scratched, replace the master, and the component that is scratching it.
2. If the development roller is scratched, replace the roller, and the component that is
scratching it.
3. Clean the corona wires.
Symptom: Vertical black band at the left or right edge of the printout
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 3. Go to step 2.
2. Make sure that the charge corona wire cleaner is at home position.
Clean the laser optics with a blower brush or soft dry cloth.
3. Clean the scanner optics.
Replace the xenon lamp.
Symptom: Vertical black lines or bands at constant positions on the copy
Check Action if Yes Action if No
1. Make a printer test (see
section 4-1-13). Is it OK? There may be a scanner problem; go to step 5. Go to step 2.
2. Clean the thermistor, hot
and pressure rollers, and
hot roller strippers.
Change the cleaning pad
if it is dirty.
Is the surface of the hot
roller scratched?
Replace the component that
is damaging the hot roller,
then replace the hot roller.
If the hot roller strippers are
badly stained with toner,
replace them, and the
thermistor (or FCU or PSU).
Go to step 3.
3. Is the master scratched? Replace the component that
is doing the damage, then
replace the master.
Go to step 4.
4. Clean the corona wires and guide plates in the paper feed path.
Clean the quenching lamp.
Replace the toner metering blade if it is damaged.
Clean the laser optics carefully with a blower brush or soft dry cloth.
If the problem remains, change the FCU or LD unit.
5. Clean the white pressure plate above the exposure glass.
6. Are there any peaks in the
SBU white waveform
(see section 5-2-9)?
Change the SBU. Change the FCU.
Symptom: Defects at repeating intervals on the printout
Check Action if Yes Action if No
There is a defect on the master belt or on one of the rollers (the most likely ones are the
hot roller, pressure roller, or development roller
Symptom: Black streaks at the leading edge
Check Action if Yes Action if No
Clean the hot roller strippers or change the master unit.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-7

Symptom: Black spots at the leading edge
Check Action if Yes Action if No
Clean inside the machine, especially around the fusing unit and transfer unit entrances.
Clean the transfer corona wire and check that it is installed properly.
If the problem remains, change the transfer corona wire or the power pack.
Symptom: Horizontal white lines or stripes across printouts
Check Action if Yes Action if No
1. Make sure that the user is using the correct type of copy paper, and storing it in a dry
place.
2. Does the printout have a
crease mark where the
white band appears?
Check the paper feed
mechanism and path from
paper feed through transfer;
correct any faults.
Go to step 3.
3. Does the development
bias terminal stay at a
constant voltage
(about -530 Vdc)?
Go to step 6. Go to step 4. Do not adjust
the variable resistors on the
power pack.
4. Does the FCU output the
power and bias trigger
signal to the power pack?
Clean the area around the
bias terminal. Go to step 5. Change the FCU.
5. Does the problem go
away if you change the
power pack?
Finished. Clean the development
roller. Go to step 6.
6. Clean the transfer corona unit (wire, endblocks, casing).
Check and replace any parts that may be causing the corona charge to leak.
7. Check that the development roller and master unit are both rotating smoothly, and that
the start and stop at the same time. If there are any problems, do the following:
a) Check the roller, master unit, and drive mechanism for any defective components,
such as gears.
b) Try changing the main motor.
Symptom: Black page with horizontal white stripes
Check Action if Yes Action if No
Replace the optic fiber cable from the main scan start detector.
If the problem remains, change the LD unit or FCU.
Symptom: Random black spots on the printout
Check Action if Yes Action if No
The grid plate may not be grounded properly. If the problem cannot be corrected, try
changing the charge corona unit, which contains the grid plate.
If the surface of the development roller is dirty, clean it.
The laser diode may be out of control. Change the LDDRor FCU.
Symptom: Horizontal black stripes
Check Action if Yes Action if No
1st August, 1994 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-8

Symptom: Horizontal black stripes
1. Is the Call Service
indicator lit? Replace the LD unit or FCU. Go to step 2.
2. Check that the master unit is installed properly and correctly grounded.
Change the master unit if it is damaged.
If the problem only occurs in copy mode, the xenon lamp may be flickering: change the
lamp, driver, or FCU.
If the problem remains, go to step 3.
3. Does the development
bias terminal stay at a
constant voltage
(about -530 Vdc)?
Go to step 6. Go to step 4. Do not adjust
the variable resistors on the
power pack.
4. Does the FCU output the
power and bias trigger
signal to the power pack?
Clean the area around the
bias terminal. Go to step 5. Change the FCU.
5. Does the problem go
away if you change the
power pack?
Finished. Clean the development
roller. Go to step 6.
6. Check that the toner metering blade is screwed in securely.
Symptom: White spots in black areas
Check Action if Yes Action if No
Clean the development roller (soft cloth and alcohol).
Clean the corona wires.
If the problem cannot be solved, change the development unit, master, or power pack.
Symptom: Data missing at the leading edge
Check Action if Yes Action if No
1. Does the problem only
occur during copying? Go to step 2. Go to step 3.
2. Check that the scan line sensor is in the correct position.
Try changing the FCU.
3. Is the correct type of copy paper being used, and is it curled at the leading edge?
Check for dust on the rollers in the paper feed path.
Lower cassette: Is the registration mechanism working correctly?
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-9

Symptom: Part of the copy missing at the left or right edges
Check Action if Yes Action if No
1. Does the problem only
occur during copying? Go to step 2. Go to step 3.
2. Check the scanner optic path.
Change the SBU or FCU.
3. Check the laser optic path.
Change the FCU.
Symptom: Distorted printout
Check Action if Yes Action if No
1. Does the problem only
occur during copying? Go to step 2. Go to step 3.
2. Check that the document feed mechanism is operating smoothly.
3. Poorly installed or defective hexagonal mirror motor.
Blockage in the paper path.
Check that the main motor, gears, rollers, and drive belts are moving smoothly.
Symptom: Fuzzy copy
Check Action if Yes Action if No
1. Does the problem only
occur during copying? Go to step 8. Check the connections between the ozone fan and
the FCU. Go to step 2.
2. Does the ozone fan turn
on? Go to step 4. Go to step 3.
3. Does the fan receive the
power and drive signals? Replace the fan. Replace the FCU (or PSU).
4. Change the ozone filter.
Check for obstructions between the transfer unit and the fusing unit.
Check that the master is grounded properly.
Change the master unit.
Clean or replace the corona wires.
Clean the laser optics carefully with a blower brush or soft dry cloth.
If the problem remains, go to step 5.
5. Does the development
bias terminal stay at a
constant voltage
(about -530 Vdc)?
Go to step 8. Go to step 6. Do not adjust
the variable resistors on the
power pack.
6. Does the FCU output the
power and bias trigger
signal to the power pack?
Clean the area around the
bias terminal. Go to step 7. Change the FCU.
7. Does the problem go
away if you change the
power pack?
Finished. Clean the development
roller.
8. Clean the scanner optics and the xenon lamp.
Check the SBU waveforms, especially MTF and reduction rate (section 5-2-9).
1st August, 1994 TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6-10

Symptom: Unfused copy
Check Action if Yes Action if No
Clean the thermistor in the fusing unit.
Check the pressure roller spring mechanism.
Change the thermistor, fusing unit, FCU, or PSU.
Symptom: Jitter, image stretched down the page
Check Action if Yes Action if No
1. Does the problem only
occur during copying? Go to step 3. Go to step 2.
2. Check the paper feed drive mechanism (motors, gears, timing belts).
Check for obstructions in the paper feed path.
Jitter: Try changing the LD unit or FCU.
3. Check the document feed drive mechanism (motors, gears, timing belts).
Check the tx motor timing belt tension (see section 5-2-7).
Replace the FCU or tx motor if the motor is making abnormal noise.
Symptom: Magnification or reduction, filled-in characters
Check Action if Yes Action if No
Adjust the SBU reduction rate (see section 5-2-9).
If the problem only occurs in copy mode, check the paper size sensors. Replace the
sensors or the FCU (or the PFU for the lower cassette).
Symptom: Misaligned output - data shifted to the left or right
Check Action if Yes Action if No
1. Check that the laser diode unit is screwed in properly.
Check that the laser optics are not misaligned.
Try changing the LD unit or FCU.
2. Adjust the SBU scan start position (see section 5-2-9).
Check that the scanner optics are not misaligned.
Check that the document table is aligned properly (see section 5-2-3).
Try changing the LD unit or FCU.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
COPY QUALITY TROUBLESHOOTING
6-11

6.2. MECHANICAL PROBLEMS
The following flow charts may help you find the problem. They do not include
such obvious steps as checking the power connection or changing the PSU
or FCU if nothing appears on the operation panel.
6.2.1. ADF/Scanner
Symptom: Non feed
Check Action if Yes Action if No
1. Are the covers closed
properly? Go to step 2. Close the covers securely.
2. Are the pick-up and feed
rollers clean? Go to step 3. Clean the rollers with a soft cloth and water. Replace
them if they are damaged.
3. Is the shutter mechanism
blocked? (If the shutter
does not lift up after
pressing Start, the tx
motor may be defective;
see step 10.)
Free the mechanism. Go to step 4.
4. Is the problem corrected
by adjusting the
separation roller (see
section 5-2-2)?
Finished Put the separation roller
adjustment back to the
original setting. Try
replacing the separation
roller. If that does not help,
go to step 5.
5. Are the gears and spring
clutches clean and
working properly?
Go to step 6. Clean the gears and
clutches. Remove any
debris from the mechanism.
6. Are the connections
between the operation
panel, FCU, and
document sensor loose?
Connect the cables properly. Go to step 7.
7. Does the LCD prompt
change when a
document is placed in the
feeder?
Go to step 8. Replace the document
sensor, operation panel
PCB, or FCU.
8. Are the connections
between the PSU and
FCU and the tx motor
loose?
Connect the cables properly. Go to step 9.
9. Does the tx motor work? This troubleshooting
procedure has finished. Go to step 10.
10. Does the FCU receive
+ 24V from the PSU? Go to step 11. Change the PSU.
11. Does the FCU output
power and phase drive
signals to the tx motor?
Replace the tx motor. Replace the FCU.
1st August, 1994 TROUBLESHOOTING
MECHANICAL PROBLEMS
6-12

Symptom: Skew caused by the scanner mechanism
Check Action if Yes Action if No
1. Are the scanner rollers
clean? Replace the separation roller and or separation
plate.
Clean the rollers using a oft
cloth and water
Symptom: Jam
Check Action if Yes Action if No
1. Are the scanner rollers
clean? Go to step 2. Clean the rollers using a soft cloth and water
2. Is the document feed
path blocked? Go to step 3. Remove any debris.
3. Is the scanner
mechanism in good
shape, and is the tx
motor timing belt tension
correct?
Go to step 4. Correct the problem.
4. Are the connections
between the operation
panel, FCU, document
width sensor, and scan
line sensor loose?
Connect the cables properly. Go to step 5.
5. Does the operation panel
PCB receive signals from
the scan line sensor and
the document width
sensor?
Replace the operation panel
PCB or FCU. Replace the document width sensor and/or scan
line sensor.
Symptom: Abnormal noise
Check Action if Yes Action if No
1. Is the machine assembled
properly. Go to step 2. Correct the problem.
2. Are the springs and
clutches in the feed/pick-
up mechanism clean?
Replace the tx motor or the
FCU. Clean them.
Symptom: Double feed
Check Action if Yes Action if No
1. Is the problem solved by
cleaning or lubricating
the separation roller?
Finished Try cleaning or replacing the
separation plate. If that does
not help, go to step 2.
2. Does adjusting the
separation roller solve the
problem (see section 5-2-
2)?
Finished Put the adjustment back to
the original position, and
replace the separation roller.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
MECHANICAL PROBLEMS
6-13

Symptom: Dirty document
Check Action if Yes Action if No
Clean the rollers and guide plates using a soft cloth and water.
Symptom: Second page not fed in
Check Action if Yes Action if No
1. Clean the rollers using a soft cloth and water.
2. Are the connections
between the operation
panel, FCU, and scan line
sensor loose?
Connect the cables properly. Go to step 3.
3. Does the operation panel
PCB receive signals from
the scan line sensor?
Replace the operation panel
PCB or FCU. Replace the scan line sensor.
1st August, 1994 TROUBLESHOOTING
MECHANICAL PROBLEMS
6-14

6.2.2. Printer
Symptom: Non-feed
Check Action if Yes Action if No
1. Check that non-feed is not due to another problem, such as "Call Service"being lit, or
the power cord not being plugged in.
Check that the feed-in area is not jammed with debris.
Check that the covers are closed properly.
Clean or replace the pick-up and feed rollers, and check that the paper lift and feed
mechanisms are working properly.
Lower cassette: Check the separation roller and spring clutch. Clean/replace if
necessary.
If the problem only happens during communication, check the connections between the
FCU, NCU, and telephone line.
2. Are the connections
between the FCU and the
upper paper size and end
sensors loose? If the
problem is in the lower
cassette, check the
connections from the
FCU to the PFU and
lower paper size and end
sensors.
Connect the cables properly. Go to step 3.
3. Do the upper or lower
cassettes’ Add Paper
indicators light even if
paper is present?
Go to step 4. Go to step 7.
4. Do the upper or lower
cassettes’ Add Paper
indicators light when the
cassettes are installed in
the machine?
Go to step 5. Go to step 6.
5. Do the signals from the
paper size sensor change
when the cassette is
installed?
Change the PFU (lower
cassette only) or FCU. Change the sensor and/or the actuator mechanism.
6. Does the signal from the
paper end sensor change
when paper is added?
Change the PFU (lower
cassette only) or FCU. Change the sensor and/or the actuator mechanism.
7. Are the connections
between the PSU, FCU,
front cover switch and
front cover interlock
switch cover loose?
Connect the cables properly. Go to step 8.
8. Does the signal from the
front cover switch change
when the cover is closed?
Go to step 9. Change the switch and/or
the actuator mechanism.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
MECHANICAL PROBLEMS
6-15

Symptom: Non-feed
Check Action if Yes Action if No
9. Does the front cover
interlock switch pass
+ 24Vand + 5Vfrom the
FCU through to the FCU?
Go to step 10. Change the switch and/or
the actuator mechanism.
10. Do the upper and lower
paper feed motors and
clutches operate?
Go to step 15 Go to step 11 (motors) or 13
(clutches).
11. Are the connections
between the FCU and the
upper and lower paper
feed motors loose?
Connect the cables properly. Go to step 12.
12. Does the FCU output
power and drive signals
to the motors?
Replace the defective motor. Replace the FCU.
13. Are the connections
between the FCU and the
upper and lower paper
feed clutches loose?
Connect the cables properly. Go to step 14.
14. Does the FCU output
power and drive signals
to the clutches?
Replace the defective clutch. Replace the FCU.
15. If the main and paper feed motors do not turn on but are in good condition, the basic
starting conditions for printing may not have been met. The conditions are as follows:
The fusing lamp must be at the correct temperature. See "Service Call Conditions: Hot
Roller Down".
The hexagonal mirror motor must have reached the correct speed. See "Service Call
Conditions: Mirror Motor Locked".
One page must have been stored in the page memory. Check the connections between
the components of the video data path (see section 1-5-2) and replace any defective
PCBs.
Symptom: Copy Jam - General
Check Action if Yes Action if No
1. Is the printer jammed with
debris? Clear the debris. Go to step 2.
2. Is the correct type of paper being used, and is it correctly loaded in the cassette?
3. Is a paper jam indicated
when the power is
switched on, even if there
is no jam.
Go to step 4. Go to step 5.
4. Does the FCU receive the
correct signals from the
registration, lower paper
feed, and copy feed-out
sensors?
Change the PFU (lower
cassette only) and/or FCU. Change the defective sensor.
5. Is the correct paper size
sensor actuator being
used?
Go to step 6. Install the correct actuator.
1st August, 1994 TROUBLESHOOTING
MECHANICAL PROBLEMS
6-16

Symptom: Copy Jam - General
Check Action if Yes Action if No
6. Is the paper size sensor
(upper/lower) outputting
the correct signals for the
installed actuator? The
signals that should be
seen are shown in the
following table.
If you suspect that the FCU
or PFU is processing the
sensor signals wrongly,
change the FCU and/or PFU.
Change the sensor.
FCU Connector (Upper Cassette) 32-4 32-3 32-2
PFU Connector (Lower Cassette) 4-6 4-5 4-4
A5 L L L
Letter H L L
A4 L H L
F, F4 L H H
Legal H H L
B4 H L H
7. Are the connections
between the FCU and the
main motor loose?
Connect the cables properly. Go to step 8.
8. Does the main motor
work? Go to step 10. Go to step 9.
9. Does the FCU output
power and drive signals
to the main motor?
Replace the main motor. Replace the FCU.
10. Do the upper/lower paper feed motors and clutches work? See steps 10 to 14 of "Non-
feed".
Symptom: Copy jam in the paper feed entrance (error code 9-07)
Check Action if Yes Action if No
1. Clean the rollers in the paper feed entrance. Replace any defective rollers
2. Check the registration sensor and lower paper feed sensor (see steps 3 and 4 of "Copy
jam - General").
3. Do the upper/lower paper feed motors and clutches work? See steps 10 to 14 of "Non-
feed".
Symptom: Copy jam inside the machine (error code 9-08)
Check Action if Yes Action if No
1. Clean the registration rollers (metal rollers - soft cloth and alcohol, rubber rollers - soft
cloth and water).
Check the paper feed path and mechanism, especially the area around the entrance to
the transfer/fusing unit.
Check the fusing unit drive mechanism. Replace the pressure springs or fusing unit
rollers or gears if necessary.
2. Check the registration sensor and copy feed-out sensor (see steps 3 and 4 of "Copy jam -
General").
Troubleshooting
TROUBLESHOOTING 1st August, 1994
MECHANICAL PROBLEMS
6-17

Symptom: Copy jam at the feed-out area (error code 9-09)
Check Action if Yes Action if No
1. Clean the rollers in the copy feed-out area.
2. Check the copy feed-out sensor (see steps 3 and 4 of "Copy jam - General").
Symptom: Double feed
Check Action if Yes Action if No
Upper cassette: Check the corner separator mechanism and side fences, and replace if
necessary.
Lower cassette: Clean, lubricate, or replace the separation roller.
Symptom: Dog-eared copies
Check Action if Yes Action if No
Excessive copy paper curl
Defective hot roller stripper
Incorrect corner separator/side fence position
Symptom: Wrinkled copies
Check Action if Yes Action if No
Check whether the problem can be solved by using another stack of paper.
Check paper transport through the printer and replace the defective component.
Replace the fusing unit pressure springs, or the entire fusing unit.
Symptom: Soiled copy paper
Check Action if Yes Action if No
Clean the rollers in the printer. If the dirt is part of the image, then clean the ADF and
scanner rollers. Also, see Copy Quality Troubleshooting (section 6-1).
Symptom: Dirt along the leading edge on the reverse side
Check Action if Yes Action if No
See "Soiled Copy Paper" above.
Clean the following components: transfer corona unit and vicinity, paper feed path,
registration rollers (soft dry cloth), feed-out rollers.
Symptom: Skew caused by the printer mechanism
Check Action if Yes Action if No
Clean the rollers in the cassettes and paper feed path. Replace any defective rollers.
Symptom: Ozone odor
Check Action if Yes Action if No
1. Is the ozone fan working? Change the ozone filter. Go to step 2.
2. Does the FCU send
power and drive signals
to the fan?
Change the ozone fan. Change the FCU.
1st August, 1994 TROUBLESHOOTING
MECHANICAL PROBLEMS
6-18

6.3. SERVICE CALL CONDITIONS
If the Call Service indicator is lit, one of the following conditions has occurred.
•Mirror Motor Locked (hexagonal mirror motor lock failure)
•Hot Roller Down (fusing lamp failure)
•LD Power Control Failure (laser diode power control failure)
•Main Motor Locked (main motor lock failure)
•Charger Leak (transfer corona charge leak)
To find out which problem has occurred, either:
•See the Auto Service Call report that was sent to the service station for
the problem with the machine. This report lists a sub-code, as well as
the error message; this sub-code may help you find the problem.
•Check the error code history using function 93.
•Try to clear the service call condition: switch the power off, wait 10 sec-
onds, then switch back on.
If the problem remains, work through the appropriate troubleshooting proce-
dure from the following pages.
After each troubleshooting attempt, reset the machine and try to operate it. If
the machine still does not work, continue troubleshooting.
Symptom: Charger Leak (Error Code 9-17)
This error occurs if FCU CN27-3 stays high for 3 s or more while the transfer corona is on
(sub-code 31)
Check Action if Yes Action if No
Clean the transfer corona wire and unit.
Check that the FCU outputs the power and trigger signals to the power pack. If not,
replace the FCU.
Replace the FCU, power pack or transfer corona unit if the problem still occurs.
Symptom: LD Power Control Failure (Error Code 9-20)
This error occurs in either of the following conditions:
•Error in the Laser Interface (LIF) chip on the FCU (sub-code 41 or 42)
•Laser power failure (sub-code 43)
Check Action if Yes Action if No
1. Do the front cover
interlock switch and front
cover microswitch both
pass + 5V?
Replace the FCU or laser
diode drive board. Replace the defective switch or actuator mechanism.
Troubleshooting
TROUBLESHOOTING 1st August, 1994
SERVICE CALL CONDITIONS
6-19