Oki B6500 Series Programming manual

B6500
Troubleshooting Manual
032107A

Chapter 1 Troubleshooting
Chapter 1 Troubleshooting CONTENTS
Chapter 1 Troubleshooting............................................................................................ 1 - 1
1. Progressing with the Troubleshooting ........................................................................ 1 - 1
1.1 Troubleshooting Flow Chart............................................................................................................. 1 - 1
1.2 Preparatory Requirements............................................................................................................... 1 - 2
1.3 Cautions for Service Operations ...................................................................................................... 1 - 3
1.4 Cautions for FIP Use........................................................................................................................ 1 - 4
2. Level 1 FIP ................................................................................................................. 1 - 6
2.1 Level 1 FIP....................................................................................................................................... 1 - 6
2.2 Flow of Level 1 FIP .......................................................................................................................... 1 - 6
2.3 Error/Status Code List...................................................................................................................... 1 - 7
3. Level 2 FIP ............................................................................................................... 1 - 10
3.1 Level 2 FIP..................................................................................................................................... 1 - 10
4. Error Code FIP ......................................................................................................... 1 - 11
4.1 Level 1 FIP..................................................................................................................................... 1 - 11
FIP1.1 NVM Error ................................................................................................................................ 1 - 11
FIP1.2 ROS Error................................................................................................................................. 1 - 12
FIP1.3 Fuser Error ............................................................................................................................... 1 - 13
FIP1.4 Fan Error .................................................................................................................................. 1 - 14
FIP1.5 Main Motor Error ..................................................................................................................... 1 - 15
FIP1.6 Cover Error............................................................................................................................... 1 - 16
FIP1.7 FIP Paper Jam/Regi to Fuser .................................................................................................. 1 - 17
FIP1.8 Paper Jam/Exit ........................................................................................................................ 1 - 20
FIP1.9 Paper Jam/Tray to Regi .......................................................................................................... 1 - 22
FIP1.10 Paper Jam/Misfeed ............................................................................................................... 1 - 24
FIP1.11 EP Cartridge .......................................................................................................................... 1 - 26
FIP1.12 Paper Size Error .................................................................................................................... 1 - 27
FIP1.13 No Tray/Tray 1, 2 .................................................................................................................. 1 - 28
FIP1.14 No Paper/Tray 1, 2 ................................................................................................................. 1 - 29
FIP1.15 Low Paper in Tray/Tray 2 ...................................................................................................... 1 - 30
FIP1.16 Drum Life ............................................................................................................................... 1 - 31
FIP1.17 Fuser Life .............................................................................................................................. 1 - 32
FIP1.18 No Power ............................................................................................................................... 1 - 33
FIP1.19 LCD/LED Display Error ......................................................................................................... 1 - 36
FIP1.20 Inoperative Keypad ............................................................................................................... 1 - 37
FIP1.21 Other Printer Error ................................................................................................................. 1 - 38
FIP1.22 Face Up Tray Error ................................................................................................................ 1 - 39
FIP1.23 Full Stack Error/500 Paper Exit ............................................................................................. 1 - 40
4.2 Level 2 FIP...................................................................................................................................... 1 - 41
FIP1.24 LVPS ..................................................................................................................................... 1 - 41
FIP1.25 MAIN MOTOR ....................................................................................................................... 1 - 42
FIP1.26 ROS ASSY ............................................................................................................................ 1 - 43
FIP1.27 FUSER ASSY ........................................................................................................................ 1 - 45
FIP1.28 SENSOR REGI ..................................................................................................................... 1 - 47
FIP1.29 SENSOR NO PAPER ............................................................................................................ 1 - 49
FIP1.30 SENSOR LOW PAPER ......................................................................................................... 1 - 51
FIP1.31 SENSOR TONER .................................................................................................................. 1 - 52
FIP1.32 INTERLOCK S/W 24V ........................................................................................................... 1 - 53
FIP1.33 INTERLOCK S/W 5V, SWITCH I/L ASSY ............................................................................. 1 - 54
FIP1.34 INTERLOCK S/W REAR ....................................................................................................... 1 - 55
FIP1.35 SWITCH I/L ASSY (Interlock S/W Front R) ........................................................................... 1 - 56
FIP1.36 PWBA EXIT MOTOR ............................................................................................................ 1 - 57

Chapter 1 Troubleshooting
Chapter 1 Troubleshooting CONTENTS
FIP1.37 MOTOR ASSY EXIT ............................................................................................................. 1 - 58
FIP1.38 CLUTCH REGI ...................................................................................................................... 1 - 59
FIP1.39 CLUTCH ASSY PH ............................................................................................................... 1 - 60
FIP1.40 GUIDE TRAY LEFT ............................................................................................................... 1 - 61
FIP1.41 HVPS/MCU ........................................................................................................................... 1 - 62
FIP1.42 Electrical Noise ...................................................................................................................... 1 - 63
FIP1.43 MOTOR ASSY EXIT ............................................................................................................. 1 - 65
FIP1.44 SENSOR FACE UP OPEN ................................................................................................... 1 - 66
FIP1.45 SENSOR FULL STACK ........................................................................................................ 1 - 67
Duplex Option ...............................................................................................................1 - 69
4.3 Error/Status Code List..................................................................................................................... 1 - 69
4.4 Table 1............................................................................................................................................ 1 - 69
4.5 Level 1 FIP...................................................................................................................................... 1 - 70
FIP2.1 Option Duplex Cover Error ...................................................................................................... 1 - 70
FIP2.2 Option Duplex Error ................................................................................................................. 1 - 71
FIP2.3 Paper Jam/Exit to Dup ............................................................................................................ 1 - 72
FIP2.4 Paper Jam/Dup to Regi ........................................................................................................... 1 - 73
FIP2.5 Paper Jam/Duplex Misfeed ..................................................................................................... 1 - 74
FIP2.6 Paper Size Error/Duplex .......................................................................................................... 1 - 75
FIP2.7 No Recognition of Option Duplex ............................................................................................ 1 - 76
4.6 Level 2 FIP...................................................................................................................................... 1 - 77
FIP2.8 PWBA DUPLEX ...................................................................................................................... 1 - 77
FIP2.9 MOTOR DUPLEX .................................................................................................................... 1 - 78
FIP2.10 SENSOR DUP ....................................................................................................................... 1 - 79
FIP2.11 SWITCH DUPLEX ................................................................................................................. 1 - 80
OCT Option ..................................................................................................................1 - 81
4.7 Error/Status Code List..................................................................................................................... 1 - 81
4.8 Level 1 FIP...................................................................................................................................... 1 - 82
FIP3.1 Option OCT Cover Error .......................................................................................................... 1 - 82
FIP3.2 Option OCT Error .................................................................................................................... 1 - 83
FIP3.3 Paper Jam/Exit to OCT ........................................................................................................... 1 - 84
FIP3.4 Paper Jam/OCT ...................................................................................................................... 1 - 85
FIP3.5 Paper Size Error/OCT ............................................................................................................. 1 - 86
FIP3.6 Full Stack Error/OCT ............................................................................................................... 1 - 87
FIP3.7 No Recognition of Option OCT ................................................................................................ 1 - 88
4.9 Level 2 FIP...................................................................................................................................... 1 - 89
FIP3.8 PWBA OCT ............................................................................................................................. 1 - 89
FIP3.9 MOTOR ASSY OCT ................................................................................................................ 1 - 90
FIP3.10 MOTOR ASSY OFFSET ....................................................................................................... 1 - 91
FIP3.11 SOLENOID ASSY GATE ...................................................................................................... 1 - 92
FIP3.12 S/W REAR COVER ............................................................................................................... 1 - 93
FIP3.13 SENSOR OCT ....................................................................................................................... 1 - 94
FIP3.14 Sensor Full Stack (On PWBA OCT) ...................................................................................... 1 - 95
FIP3.15 Sensor Offset (On PWBA OCT) ............................................................................................ 1 - 96
550 Paper Feeder Option .............................................................................................1 - 97
4.10 Error/Status Code List................................................................................................................... 1 - 97
4.11 Level 1 FIP.................................................................................................................................... 1 - 98
FIP4.1 No Tray/Tray 3, 4 .................................................................................................................... 1 - 98
FIP4.2 No Paper/Tray 3, 4 .................................................................................................................. 1 - 99

Chapter 1 Troubleshooting
Chapter 1 Troubleshooting CONTENTS
FIP4.3 Low Paper in Tray/Tray 3, 4 .................................................................................................. 1 - 100
FIP4.4 No Recognition of Option 550 Paper Feeder ........................................................................ 1 - 101
FIP4.5 Inappropriate Option 550 Paper Feeder ................................................................................ 1 - 102
4.12 Level 2 FIP.................................................................................................................................. 1 - 103
FIP4.6 PWBA FEEDER 550 ............................................................................................................. 1 - 103
FIP4.7 PWBA FEEDER 550 ............................................................................................................. 1 - 104
FIP4.8 SENSOR NO PAPER ............................................................................................................ 1 - 105
FIP4.9 SENSOR LOW PAPER ......................................................................................................... 1 - 107
FIP4.10 OPT ASSY SIZE ................................................................................................................. 1 - 108
FIP4.11 CLUTCH ASSY PH ............................................................................................................. 1 - 109
FIP4.12 CLUTCH PR-REGI .............................................................................................................. 1 - 110
5. 5. Image Quality Defects ........................................................................................ 1 - 111
5.1 Entry Chart for Image Quality Troubleshooting............................................................................. 1 - 111
5.2 Image Quality FIP ......................................................................................................................... 1 - 113
FIP- 1.P1 Faint Print ......................................................................................................................... 1 - 113
FIP- 1.P2 Blank print (No print) ......................................................................................................... 1 - 115
FIP- 1.P3 Solid Black ........................................................................................................................ 1 - 117
FIP- 1.P4 Vertical blank lines (White stripes in paper transport direction) ........................................ 1 - 118
FIP- 1.P5 Horizontal band cross out ................................................................................................. 1 - 120
FIP- 1.P6 Vertical stripes .................................................................................................................. 1 - 122
FIP- 1.P7 Horizontal stripes .............................................................................................................. 1 - 123
FIP- 1.P8 Partial Deletion ................................................................................................................. 1 - 125
FIP- 1.P9 Spots ................................................................................................................................. 1 - 126
FIP- 1.P10 Ghosting ......................................................................................................................... 1 - 127
FIP- 1.P11 Background (Fog) ........................................................................................................... 1 - 129
FIP- 1.P12 Skew ............................................................................................................................... 1 - 130
FIP- 1.P13 Paper damage ................................................................................................................ 1 - 131
FIP- 1.P14 Unfused Image ............................................................................................................... 1 - 133
6. Judgment of Print Consistency................................................................................1 - 135
6.1 Leading edge registration ............................................................................................................ 1 - 135
6.2 Side Edge Registration ................................................................................................................ 1 - 136
6.3 Skew ............................................................................................................................................ 1 - 137
6.4 Perpendicularity ........................................................................................................................... 1 - 138
6.5 Parallelism ................................................................................................................................... 1 - 139
7. Preventive Maintenance..........................................................................................1 - 141

1 – 1
Chapter 1 Troubleshooting
The FIP makes the assumption that the printer controller (PWBA ESS) is functioning
normally. If the problem cannot be corrected by using the FIP, replace the printer
controller with a new one and check for proper operation.
Any OEM with unique specifications, or the direct control of any operation by the printer
controller, may cause the operation to be different from the description in this manual.
Troubleshooting in this manual assumes use of Diag. tools (maintenance tools).
However, the troubleshooting procedures allow for the case where the Diag tools are not
used. You can correct printer problems by using these procedures.
Chapter 1 Troubleshooting
1. Progressing with the Troubleshooting
After verifying the nature of the problem, proceed with the troubleshooting process efficiently, making
use of the Fault Isolation Procedures (FIPs). Also use the Maintenance Manual for Operation of Diagnostics,
Wire connecting diagrams, and Principle of operation.
1.1 Troubleshooting Flow Chart
Using the Troubleshooting Flow Chart, proceed as follows:

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Chapter 1 Troubleshooting
1.2 Preparatory Requirements
Be sure to check the following items before beginning the troubleshooting procedures:
1) Voltage of the power supply is within specifications (measure the voltage at the electric outlet).
2) Power cord is free from breakage, short-circuit, disconnected wire, or incorrect connection.
3) The laser printer is properly grounded.
4) The laser printer is not installed in a place subjected to extremes of temperature, humidity or rapid
change of temperature.
5) The laser printer is not installed close to water service, humidifier, heat generating unit, or fire, in
very dusty place, or a place exposed to air flow from the air conditioning system.
6) The laser printer is not installed in a place where volatile gas or inflammable gas is generated.
7) The laser printer is not installed under direct sunlight.
8) The laser printer is installed in a well-ventilated place.
9) The laser printer is installed on a strong, stable surface.
10) The paper used in the printer meets specifications (standard paper is recommended).
11) The laser printer is handled properly.
12) Parts which should be replaced periodically are replaced when the specified number of sheets
have been printed.

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Chapter 1 Troubleshooting
1.3 Cautions for Service Operations
1) When servicing the printer, be sure to remove the power cord from the power outlet except when
absolutely necessary.
Unless specifically indicated, whenever the printer power is ON, never touch any of
the electrical components.
The power switch/inlet of the LVPS has voltage present even while the power
supply is cut off. Never touch any of the electrical components.
2) When it is necessary to check a component(s) with covers removed and with the interlock and
safety and power switches ON, remove the connector (P/J140) on the ROS ASSY.
When checking some parts with covers removed and with the interlock and safety
and power switches ON, laser beams may be emitted from the ROS ASSY. Since it
is dangerous, be sure to remove the connector (P/J140) while performing service.
3) When it is necessary to check a component(s) with the left cover removed and power ON, be sure
to remove the HVPS connector (P/J31) while servicing the printer.
When checking some parts with the left cover removed and power ON, high voltage
may be applied by the HVPS. Be sure to remove the connector (P/J31) on the HVPS.
When connecting the connector (P/J31) on the HVPS according to the instructions
of the FIP, never touch the HVPS or any of its parts.
4) When using Diagnostic tools or a meter to measure high voltage, be sure to keep the components
covered unless specified.
When using Diagnostic Tool or a meter to measure high voltage, never touch parts
of high voltage.
Be sure to follow the procedures in this manual.
5) When operating a drive unit using the Diagnostic or other tools, be sure to keep them covered
unless otherwise specified.
Never touch the drive units when operating them using the Diagnostic or other
tools. Be sure to observe the procedures in this manual.
6) Avoid burns by not touching any fusing components until they have had sufficient time to cool
down.
7) Damage to sensitive electronic components should be avoided by grounding the body using a wrist
band or other suitable Electrostatic Discharge (ESD) tools.

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Chapter 1 Troubleshooting
1.4 Cautions for FIP Use
1) The FIP makes the assumption that the printer controller (PWBA ESS) is functioning normally. If
the problem cannot be corrected by using the FIP, replace the printer controller with a new one and
check for proper operation.
If the trouble is not still corrected, replace the major parts and then related parts in succession and
confirm according to the procedures of the "Initial check" and "Major check parts".
2) When troubleshooting using the FIP, parts substitution of the HVPS/MCU, FUSER ASSY, BTR
ASSY or other parts may be necessary for fault isolation. Have these parts available in advance.
3) The initial checks in the FIP only checks items which are most likely to cause the problem and can
be quickly eliminated.
4) Check both the major parts as well as any related sub-components in the initial checks.
5) When working with the printer, be sure to remove the power cord. If a check requires the power to
be connected, never touch any live parts.
6) Connector condition is denoted as follows:
[P/J12]→Connector (P/J12) is connected.
[P12]→Plug side of the connector (P/J12) removed (except when attached directly to the board).
[J12]→Jack side of the connector (P/J12) removed (except when attached directly to the board).
7) [P/J1- 2(+) and P/J3-4(-)] in the FIP means taking a measurement with the plus side of the meter
connected to [P/J1, Pin 2] and the minus side to [P/J3, Pin 4].
8) [P/J1 -> P/J2] in the FIP means measurement for all terminals corresponding between [P/J1] and
[P/J2] as shown in the "Wire connecting diagram".
9) In [P/J1- 2 (+) and P/J3-4 (-)] in the FIP where voltage is measured, [P/J3-4 (-)] is always at the AG
(analog ground), SG (signal ground), or RTN (return).
Therefore, after verifying ground between AGs, SGs, or RTNs respectively, the minus side can be
connected to the PIN of AG, SG or RTN instead of [P/J3-4 (-)].
However, care should be taken not to mistake since [AG], [SG], and [RTN] are not on the same
level.
10) Measure the voltage of small connectors with the special tool. Handle the tool with care, as the
leading edge of the tool is pointed.
11) When measuring a voltage, ensure that the EP CARTRIDGE, BRT ASSY and paper tray are prop-
erly seated. Close the COVER TOP ASSY, FUSER ASSY, and COVER REAR and switch the
printer power ON.
12) Voltages in the FIP are nominal. If the values fall within a tolerance of +/- 10%, they should be con-
sidered acceptable.
13) Parts which are routinely checked, as indicated in the FIP, and without any specific removal proce-
dures, should be handled carefully.

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Chapter 1 Troubleshooting
14) "Replacement" in the FIP indicates replacement of parts which are considered to be the source of
trouble. These parts are sometimes components of assemblies containing them, or of a higher-
level assembly. In such an instant, the higher-level assembly must be replaced.
15) In the FIP, the paper tray at the lower part of the printer is referred to as "Tray 1", and the second
tray as "tray 2", and the first tray of Option 550 Paper Feeder as “Tray 3”, and the second tray as
“Tray 4”.
16) Some checks in the FIP make decisions based on the availability or non-availability of Diagnostic
tools (maintenance tools). Troubleshoot accordingly using the instructions in the FIP.
17) Some checks in the FIP make decisions based on specifications. Troubleshoot accordingly using
the instructions in the FIP.

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Chapter 1 Troubleshooting
2. Level 1 FIP
2.1 Level 1 FIP
The level 1 FIP is the first step for problem resolution. The level 1 FIP isolates the presence of various
troubles including error codes. The level 2 FIP provides a guide for proceeding with the
troubleshooting.
2.2 Flow of Level 1 FIP

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Chapter 1 Troubleshooting
2.3 Error/Status Code List
For information about the following FIP items described in “FIP to be referenced”
column in the following table, refer to the following:
FIP1.1 through 45: Printer
FIP2.1 through 11: Option Duplex
FIP3.1 through 15: Option OCT
FIP4.1 through 12: Option 550 Paper Feeder
Status Code Error Contents Error Description FIP to be
referenced
STATUS 1-5 Cassette Fail - Paper size is not specified. FIP1.13
FIP4.1
STATUS 1-6 Xero Fail
- EP CARTRIDGE is not installed, or incor-
rectly installed. - EP CARTRIDGE out of
specifications is installed.
FIP1.11
STATUS 2-1 NVM Abnormality
- Failure of the NVRAM occurred at power-
ing on. - Write error to the NVRAM
occurred.
FIP1.1
STATUS 2-2 Fan Motor Abnormality - Abnormal rotation or other failure of the
FAN MAIN or FAN SUB occurred. FIP1.4
STATUS 2-3 Main Motor Abnormality - Rotation of MAIN MOTOR does not reach
the specified speed. FIP1.5
STATUS 2-4 ROS Motor Abnormality
- Interval of /BD signal after ROS Motor
starts is delayed from the specified value.
- Interval of /BD signal became delayed
from the specified value after it reached the
specified value.
- Laser beam output is not the specified
level.
FIP1.2
STATUS 2-6 Fuser Abnormality
- Fuser does not reach the specified tem-
perature after the specified time.
- Fuser Lamp lights for ten seconds or
more in standby.
- Fuser temperature became 125 °C or
lower during printing.
- Fuser temperature became 220 °C or
higher.
-The thermistor (thermal sensor) have
break.
FIP1.3
STATUS 3-1 JS0
STATUS 3-1 to 3-5 indicates JAM by com-
bination of Table 1-1.
-
STATUS 3-2 JS1
STATUS 3-3 JS2
STATUS 3-4 JS3
STATUS 3-5 JS4

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Chapter 1 Troubleshooting
STATUS 3-6 Paper Size Mismatch
- Paper size detected by the Paper Size
Switch or set in the NVRAM does not
match the paper length obtained from ON
time of Regi Sensor at feeding.
FIP1.12
STATUS 15-1 Xero Warning - Remaining toner in EP CARTRIDGE
became low. FIP1.16
STATUS 15-3 Near end of paper in Tray 4 - Remaining paper in Tray 4 became low. FIP4.3
STATUS 15-4 Near end of paper in Tray 3 - Remaining paper in Tray 3 became low. FIP4.3
STATUS 15-5 Near end of paper in Tray 2 - Remaining paper in Tray 2 became low. FIP1.15
STATUS 15-6 Fuser Life Warning - Fuser printed more than 200,000 sheets
of paper. FIP1.17
STATUS 16-1 Face Up Tray Fail - Face Up Tray is not correctly installed in
Duplex or OCT mode. FIP1.44
STATUS 16-3 Option Tray Unit Fail - Option Tray is not installed when Option
Tray is selected. FIP4.4
STATUS 16-4 Full Stack (500 Paper Exit) - 500 Paper Exit became Full Stack. FIP1.45
STATUS 16-5 Full Stack (OCT) -Option OCT became Full Stack. FIP3.6
STATUS 17-1 Top/Rear Cover Open -COVER OPEN or COVER REAR 500 is
open. FIP1.6
STATUS 17-2 OCT Cover Open - Cover of Option OCT is open. FIP3.1
STATUS 17-3 Duplex Cover Open -Cover of Option Duplex is open. FIP2.1
STATUS 17-4 Inappropriate Opt FDR - Inappropriate Option Feeder
is detected. FIP4.5
STATUS 17-5 OCT Unit Fail - Option OCT is not installed when OCT
mode is selected.
FIP3.2
FIP3.7
STATUS 17-6 Duplex Unit Fail - Option Duplex removed after powering
on.
FIP2.2
FIP2.7
STATUS 21-1 Illegal Size (Duplex/OCT) - Paper size that is not supported in Duplex
or OCT mode is selected.
FIP2.6
FIP3.5
STATUS 21-3 NO Paper in Tray 4 -No paper in Tray 4 FIP4.2
STATUS 21-4 NO Paper in Tray 3 -No paper in Tray 3 FIP4.2
STATUS 21-5 NO Paper in Tray 2 -No paper in Tray 2 FIP1.14
STATUS 21-6 NO Paper in Tray 1 -No paper in Tray 1 FIP1.14
Status Code Error Contents Error Description FIP to be
referenced

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Chapter 1 Troubleshooting
JS4 JS3 JS2 JS1 JS0 Contents of
Jam Error Description FIP to be
referred
1 0 0 0 1 Exit Jam 1
Paper Jam/Exit -When the paper was not
fed to Exit Sensor within the specified
time. - When Exit Sensor turned ON in
warming up.
FIP1.8
1 1 0 0 1 Exit Jam 2
Paper Jam/Exit - When paper was not
fed to Exit Sensor within the specified
time after SENSOR REGI OFF.
FIP1.8
0 0 0 0 1 Exit Jam 3
Paper Jam/Exit - When the paper was
fed out from Exit Sensor earlier than the
specified time.
FIP1.8
0 0 0 1 0
Feed Jam 1
(Early Feed
Jam)
Paper Jam/Tray to Regi -When the paper
was fed to Regi Sensor earlier than the
specified time. -Paper interval became
narrow than the specified time because
of the two or more papers are fed at a
time. -Paper size error. The paper longer
than Legal 14” is used.
FIP1.9
0 1 0 1 0
Feed Jam 2
(Misfeed
Jam)
Paper Jam/Misfeed -When the paper did
not reach Regi position within the speci-
fied time.
FIP1.10
0 1 0 1 1 Reg. Jam 1
Paper Jam/Regi to Fuser -When the
paper did not reach Fuser from Regi
position within the specified time.
FIP1.7
1 0 0 1 1 Reg. Jam 2
Paper Jam/Regi to Fuser - When Regi
Sensor turned ON in warming up. FIP1.7
0 0 1 0 0 Duplex Jam 1
Paper Jam/Dup to Regi -When the paper
reached Regi position from Duplex Sen-
sor earlier than the specified time.
FIP2.4
0 1 1 0 0 Duplex Jam 2
Paper Jam/Exit to Dup -When the paper
did not reach Duplex Sensor within the
specified time.
FIP2.3
1 0 1 0 0 Duplex Jam 3
Paper Jam/Dup to Regi -When the paper
was not fed to Duplex Sensor within the
specified time. - When Duplex Sensor
turned ON in warming up.
FIP2.4
1 1 1 0 0
Duplex Jam 4
(Misfeed
Jam)
Paper Jam/Misfeed -When the paper did
not reach Regi position from Duplex Sen-
sor within the specified time.
FIP2.5
0 1 1 0 1 OCT Jam 1
Paper Jam/Exit to OCT - When the paper
did not reach to OCT Sensor from Exit
Sensor within the specified time.
FIP3.3
1 0 1 0 1 OCT Jam 2
Paper Jam/OCT -When the paper was
not fed to OCT Sensor within the speci-
fied time. - When OCT Sensor turned ON
in warming up.
FIP3.4

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Chapter 1 Troubleshooting
3. Level 2 FIP
3.1 Level 2 FIP
The Level 2 FIP is the diagnostic procedure to sort various troubles in addition to the error codes. When
troubleshooting, executing the steps given in the FIP or checkout procedure allows you to quickly find
the cause of a problem.

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Chapter 1 Troubleshooting
4. Error Code FIP
4.1 Level 1 FIP
FIP1.1 NVM Error
*1: Though some kind of foreign noise would be possible cause, go to [FIP1.42 Electrical Noise] and
check, to make sure.
Step Check Yes No
Possible causes:
HVPS/MCU (PL12.1.19)
1 Does Error occur when the power is turned ON? Go to step 4. Go to step 2.
2 Does Error still occur when the power is turned OFF
and ON again? Go to step 4. Go to step 3.
3 Does Error still occur after several ON/OFF procedures
of the power? Go to step 4. End of work *1
4
Checking HVPS/MCU non-volatile memory setup mode
Is non-volatile memory setup mode accessible? Check
using Chapter 2 Diagnostic [ADJUSTMENT PARAME-
TER INTIALIZE MODE].
Go to step 5. Replace HVPS/
MCU. (RRP12.10)
5
Checking NV RAM for data setup
Are all NVRAM data set appropriately?
Check using Chapter 2 Diagnostic [ADJUSTMENT
PARAMETER INTIALIZE MODE].
Go to step 7. Go to step 6.
6
Checking Error after changing HVPS/MCU data setup
Change NV RAM data to the correct setup value, and
then turn the power ON again.
Does Error still occur?
Replace HVPS/
MCU, then go to
step 7.
(RRP12.10)
End of work
7 Checking after replacing HVPS/MCU Does Error
occur?
Go to FIP1.42
Electrical Noise. End of work

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Chapter 1 Troubleshooting
FIP1.2 ROS Error
Step Check Yes No
Possible causes:
ROS ASSY (PL8.1.1)
HVPS/MCU (PL12.1.19)
EP CARTRIDGE
HARNESS ASSY ROS (PL8.1.2)
LVPS (PL12.1.5)
1
Checking NVRAM for data setup value.
Are the values of NV03 (resolution) and the value of
NV04 (Laser Diode output) set at the initial setup value
in the factory?
Check using Chapter 2 Diagnostic [ADJUSTMENT
PARAMETER INITIALIZE MODE].
Go to FIP1.26
ROS ASSY.
Set NV03 and
NV04 to factory
setup, and then
check again. If
Error still occurs,
go to FIP1.26 ROS
ASSY.

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Chapter 1 Troubleshooting
FIP1.3 Fuser Error
Step Check Yes No
Possible causes:
FUSER ASSY (PL8.1.20) HVPS/MCU (PL12.1.19)
LVPS (PL12.1.5)
HARNESS ASSY FUSER (PL8.1.17)
HARNESS ASSY
LVPS (PL12.1.1)
1
Checking the thermistor for operation.
Does Error occur soon after the power is turned ON?
Error occurs as soon as the power is turned ON, or just
after the time when a short warm up period elapsed.
Replace FUSER
ASSY. (RRP8.8)
Go to FIP1.27
FUSER ASSY.

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Chapter 1 Troubleshooting
FIP1.4 Fan Error
Step Check Yes No
Possible causes:
FAN MAIN (PL1.1.14)
FAN SUB (PL8.1.5)
LVPS (PL12.1.5)
HVPS/MCU (PL12.1.19)
1 Checking FAN MAIN for rotation (1).
Does FAN MAIN rotate, when the power is turned ON? Go to step 2. Go to step 5.
2 Checking FAN SUB for rotation (1).
Does FAN SUB rotate, when the power is turned ON? Go to step 3. Go to step 9.
3
Checking FAN MAIN for rotation (2).
Does FAN MAIN rotate in high-speed?
Check using Chapter 2 Diagnostic [Fan Motor, High
Speed Test].
Go to step 4. Go to step 5.
4
Checking FAN SUB for rotation (2).
Does FAN SUB rotate in high-speed?
Check using Chapter 2 Diagnostic [Fan Motor, High
Speed Test].
Replace HVPS/
MCU, and watch
FUN SUB for a
while.
(RRP12.10)
Go to step 9.
5
Checking the power to FAN MAIN.
Is FAN MAIN connected correctly, and is the voltage
across P/J24-18(+) and P/J24-17(-), 24 VDC?
(12 VDC, when half-speed)?
Go to step 6. Go to step 7.
6
Checking the FAN ALARM signal (1).
Is the voltage across P/J24-17(+) and P/J24-16(-), 0.82
VDC or more?
Replace FAN
MAIN. (RRP12.6)
Replace HVPS/
MCU. (RRP12.10)
7
Checking after replacing FAN MAIN
Replace the FAN MAIN.
Does FAN Error occur when the power is turned ON?
Go to step 8. End of work
8
Checking after replacing LVPS
Replace the LVPS.
Does FAN Error occur when the power is turned ON?
Replace HVPS/
MCU.
(RRP12.10)
End of work
9
Checking the power to FAN SUB
Is FAN SUB connected correctly, and is the voltage
across P/J27-19(+) and P/J27-18(-), 24 VDC?
(12 VDC, when half-speed)?
Go to step 10. Go to step 11.
10
Checking the FAN ALARM signal
Is the voltage across P/J27-18(+) and P/J27-17(-), 0.82
VDC or more?
Replace FAN
SUB (RRP8.2)
Replace HVPS/
MCU. (RRP12.10)
11
Checking after replacing FAN SUB
Replace the FAN SUB.
Does FAN Error occur when the power is turned ON?
Go to step 12. End of work
12
Checking after replacing LVPS
Replace the LVPS.
Does FAN Error occur when the power is turned ON?
Replace HVPS/
MCU.
(RRP12.10)
End of work

1 – 15
Chapter 1 Troubleshooting
FIP1.5 Main Motor Error
Step Check Yes No
Possible causes:
MAIN MOTOR (PL11.1.2) GEAR ASSY HOUSING
(PL11.1.3)
GEAR ASSY PLATE (PL11.1.10)
LVPS (PL12.1.5)
HVPS/MCU (PL12.1.19)
1
Checking MAIN MOTOR installation
Are MAIN MOTOR, GEAR ASSY HOUSING and GEAR
ASSY PLATE installed correctly?
With tool Go to
step 2. Without
tool Go to step 3.
Reinstall obstruc-
tive parts.
2
Checking MAIN MOTOR for operation
Does the MAIN MOTOR rotate, and each gear rotate
normally?
Check using Chapter 2 Diagnostic [Main Motor Test].
Remove COVER LEFT (PL1.1.6) to check.
Replace HVPS/
MCU.
(RRP12.10)
Go to step 3.
3
Checking GEAR ASSY HOUSING and GEAR ASSY
PLATE for operation.
Does each gear rotate normally?
Rotate and check each gear of GEAR ASSY HOUSING
and GEAR ASSY PLATE.
Go to FIP1.25
MAIN MOTOR.
Replace the
obstructive parts.

1 – 16
Chapter 1 Troubleshooting
FIP1.6 Cover Error
Step Check Yes No
Possible causes:
INTERLOCK S/W 24V (PL8.1.11)
INTERLOCK S/W 5V (PL8.1.12)
INTERLOCK S/W REAR (PL12.1.7)
SWITCH I/L ASSY (PL1.1.11)
COVER OPEN (PL1.1.2)
HVPS/MCU (PL12.1.19)
LVPS (PL12.1.5)
1
Checking COVER OPEN and COVER REAR
Are the tabs to push down INTERLOCK S/W 24V, 5V,
and REAR, and SWITCH I/L ASSY damaged?
Open COVER OPEN and COVER REAR to check.
Replace COVER
OPEN or COVER
REAR.
With tool Go to step
2. Without tool Go
to FIP1.32,33,34,
and 35 INTER-
LOCK S/W.
2
Checking INTERLOCK S/W 24V and 5V on function
Does the number on Sensor/Switch Check increase by
one, every time INTERLOCK S/W is pushed while
pressing down the SWITCH I/L ASSY with a finger?
Check using Chapter 2 Diagnostic [Sensor/Switch
Check].
Go to step 3.
Go to FIP1.32 and
33 INTERLOCK S/
W.
3
Checking INTERLOCK REAR on function
Does the number on Sensor/Switch Check increase by
one, every time INTERLOCK S/W REAR is pushed
while pressing down the INTERLOCK S/W 24V with a
finger?
Check using Chapter 2 Diagnostic [Sensor/Switch
Check].
Go to step 4. Go to FIP1.34
INTERLOCK S/W.
4
Checking SWITCH I/L ASSY on function
Does the number on Sensor/Switch Check increase by
one, every time SWITCH I/L ASSY is pushed while
pressing down both INTERLOCK S/W 24V and 5V with
the finger?
Check using Chapter 2 Diagnostic [Sensor/Switch
Check].
Replace HVPS/
MCU.
(RRP12.10)
Go to FIP1.33 and
35 INTERLOCK S/
W.