Kyocera DU-25 Service Manual DU25EC05
Chapter 5 Troubleshooting
5-1 DU-25
5.1. General
This section explains how to take the corrective action against a trouble. Since every
operating function of the duplexer is commanded through the communication with the
printer, most troubles could happen due to the communication error between the
duplexer and the printer.
Firstly, following the basic check flow on the next page can lead you check and solve the
errors involved with the communication circuit and the power supply.
5-2 DU-25
5.1.1. Preparation and precaution
To operate the duplexer while it is separate from the printer, use an extension cable jig. It
should allow the duplexer to be fed power from the printer.
Before connecting an extension cable to the duplexer and to the printer, be
sure that the printer’s power switch is set to off.
To conduct troubleshooting on the duplexer, no other option equipment should be connected together with the duplexer and the printer.
5-3 DU-25
5.2. Electrical troubleshooting
The flow charts follow help isolate the defective parts in the duplexer. If the duplexer
needs to be dismantled in the procedures below, refer to
Chapter 2, Disassembly
.
5-4 DU-25
5.2.1. Basic check
The flow chart below is used to check the power lines and communication lines in the
duplexer. This check must be conducted with the duplexer installed with the printer.
Basic check
5-5 DU-25
5.2.2. “Duplex unit rear cover open” does not go off
The rear cover status is monitored by a microswitch at the rear of the DU-25. Investigate
this microswitch following the procedures below.
Cover open message does not go off
5-6 DU-25
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