Service Manuals, User Guides, Schematic Diagrams or docs for : Kyocera Printer _OPTIONS DU-20-21 SDU20C06
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Chapter 6 Troubleshooting
Contents
6.1 Introduction 6-2
6.1.1 Setup for troubleshooting 6-2
6.2 Electrical troubleshooting 6-3
6.2.1 Analyzing basic symptoms (electrical) 6-3
6.2.2 Rear cover open message does not go out 6-5
6.2.3 Duplexer does not re-feed 6-7
6.2.4 Registration motor defect 6-8
6.2.5 Feeding motor does not rotate 6-9
6.2.6 Feeding sensor defect 6-10
6.2.7 Transportation clock sensor defect 6-11
6.2.8 Parking sensor defect 6-12
6.2.9 Home position sensor defect 6-13
6.2.10 Re-feeding sensor defect 6-14
6.2.11 Check on +24V line 6-15
6.2.12 Error messages 6-16
6.3 Mechanical troubleshooting 6-17
6.3.1 C2 error (Mechanical) 6-18
6.3.2 Paper skew 6-19
6.3.3 Paper jam 6-20
6.3.4 Dog-ear 6-23
6-1
6.1. Introduction
This chapter explains procedures for identifying and correcting duplexer
problems (troubleshooting) of both electrical and mechanical. Most of prob-
lems concerning the duplex electrical may arise from defects in the interface
with the printer as the duplexer is controlled by the printer itself. Section
6.2.1. Analyzing basic symptoms (electrical) on page 6-3 allows to deter-
mine whether the problem is caused by a defect in the duplexer interface or
in its power supply.
Problems concerning paper handling, such as paper skew and paper jam are
explained in Section 6.3.3. Paper jam on page 6-20.
Diagram indicating the locations of major components referred to in this sec-
tion is attached in Section 6.2. Electrical troubleshooting on page 6-3.
6.1.1. Setup for troubleshooting
Where instructed to do so in the following sections, the duplexer must be
removed from the printer and its connector must be connected to the
printer's connector using the extension cable jig.
Caution Before removing the duplexer from the printer or before connecting the duplexer's
connector to the printer's connector using the extension cable jig, be sure to turn off
printer power.
Unless otherwise noted, the printer must be connected only to the duplexer
during troubleshooting. No other options units (sorter, paper feeder[s]) may
not be connected to the printer.
6-2
6.2. Electrical troubleshooting
When a duplexer malfunction occurs, begin troubleshooting by going through
the following flowchart.
6.2.1. Analyzing basic symptoms (electrical)
Following this chart will allow to determine whether the problem is caused
by a defect in the duplexer interface or in its power supply. This chart must
be followed first of all following procedures.
In following the flowchart below, the duplexer should be left installed to the
printer in normal manner. (Follow the arrow downward if yes; otherwise fol-
low No.)
6-3
6-4
6.2.2. Rear cover open message does not go out
Follow this chart when the Duplexer unit rear cover Open message is shown
on the printer's message display.
6-5
6-6
6.2.3. Duplexer does not re-feed
Follow this chart if the duplexer does not re-feed the paper in the reversing
bay. This will happen most often when the re-feeding clutch is defective (sig-
nal=CLON).
6-7
6.2.4. Registration motor defect
The registration motor drives the adjuster wings (guides) according to paper
size commands.
6-8
6.2.5. Feeding motor does not rotate
The feeding motor is driven by PI MOT command.
6-9
6.2.6. Feeding sensor defect
The feeding sensor uses the PISNS command.
6-10
6.2.7. Transportation clock sensor defect
The transportation clock sensor uses the PIMCLK command which the
encoding disc generates.
6-11
6.2.8. Parking sensor defect
The parking sensor detects the paper (with the reverse side printed) parking
in the reversing bay using the PHSNS command.
6-12
6.2.9. Home position sensor defect
The home position sensor detects the home position for the adjuster wings
using the GHOME signal.
6-13
6.2.10. Re-feeding sensor defect
The re-feeding sensor uses the POSNL and POSNSP signals to start re-feed-
ing the paper in the reversing bay.
6-14
6.2.11. Check on +24V line
This section provides steps for checking along the +24V line in the duplexer.
6-15
6.2.12. Error messages
The printer looks after itself and other option units installed and shows vari-
ous error messages. Error messages start with the Call Service person mes-
sage followed by an error code which is a combination of letter E, F, or C and
a number. Errors pertaining to the duplexer include the following and the
meaning.
Error
Meaning Suggested cause Corrective action
codes
Communication error, Defective printer engine Follow instruction in Section 6.2.1. Ana-
C1 between the duplexer and the board. Defective connector of lyzing basic symptoms (electrical) on
printer engine. duplexer. page 6-3.
Duplex registration error, Check all mechanisms for Follow instruction in Section 6.2.4. Reg-
Defective duplexer regist. correct duplex registration. istration motor defect on page 6-8 and
C2 motor. Defective duplexer Section 6.2.9. Home position sensor
main board. defect on page 6-13.a
C3 Same as C1; except that this is See C1 above. See C1 above.
checked at power up only.
a.
For error C2, also see Section 6.3. Mechanical troubleshooting on page 6-17.
For other error codes, refer to the printer's service manual.
6-16
6.3. Mechanical troubleshooting
This section mainly concerns with paper handling problems such as paper
skew, jam, and dog-ear. These are most likely to be caused by defect in
mechanical component.
6-17
6.3.1. C2 error (Mechanical)
Error C2 implies the duplex registration error. Section 6.2.12. Error mes-
sages on page 6-16.
6-18
6.3.2. Paper skew
If paper skew occurrs while feeding from the duplexer, follow the flowchart
below. This chart will help locating whether the skew is caused by the
duplexer or the printer.
6-19
6.3.3. Paper jam
The first flowchart (below) in this section allows to locate the unit in which
paper is jammed.
6-20
The READY indicator on the duplexer can flash in one of the following occa-
sions.
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