3.TROUBLESHOOTING FLOWCHART

3.1Before Repairing a Fault

Before servicing the printer, ask the customer in what situation the trouble occurred and record the response.

Before starting troubleshooting, operate the printer in the same situation as that at the time of trouble occurrence to see if the same trouble occurs again. If not, perform the printers self test and thoroughly test the printers functionality. If the trouble is reproducible proceed to the troubleshooting section.

3.2Troubleshooting

(1)The data is not received using a serial interface.

(2)Using a serial interface, the print data is omitted or the print operation is not performed.

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Oki 3321, 3320 specifications Troubleshooting Flowchart, Before Repairing a Fault