6.TROUBLESHOOTING AND REPAIR

6.1Items to Check Before Repair

(1)Check the inspection items specified in the instruction manual.

(2)Find out as many details of the trouble as possible from the customer.

(3)Inspect in the conditions as close as possible to those at the time the trouble occurred.

(4)Proceed with the repair as follows:

Check the trouble status according to Table 6.1 for the details of the trouble. Then, locate the trouble position according to the detailed flowchart.

(5)Carry out a thorough test after the repair to check for correct functioning.

6.2Troubleshooting Table

 

 

Table 6.1

 

 

 

 

 

 

Status

 

Trouble Contents

Troubleshooting

Surmise of Trouble

 

Flowchart No.

 

 

 

 

 

 

 

 

 

 

Power is not supplied.

1

Control/Power Supply Board,

 

Driver Board, Transformer Assy.

 

 

 

 

 

No spacing operation

2

Space Motor, Carriage Cable,

Trouble upon

Printhead.

power on

 

 

 

 

 

 

 

 

Space Motor, Carriage Cable,

 

Homing does not end normally.

3

Control/Power Supply Board,

 

 

 

 

Driver Board, Spacing Mechanism

 

 

 

 

 

 

Paper jam while paper insertion

4

Pressure Roller Mechanism, Pull Up

 

Roller Cover.

 

 

 

 

 

Smearing/Missing dots

5

Printhead, Driver Board, Space

 

Motor, Carriage Cable

 

 

 

 

 

Faint or dark print

6

Printhead, Ribbon Feed Assembly,

 

Driver Board

 

 

 

 

Trouble during

Ribbon feed trouble

7

Ribbon Feed Assembly, Space

printing

Motor, Driver Board

 

 

 

 

Line feed trouble

8

LF Motor, Platen Assy, LF

 

Mechanism, Driver Board

 

 

 

 

 

Malfunction of switch on

9

Operation Panel, Driver Board

 

 

operation panel

 

 

 

 

 

Data receiving failure

0

Driver Board, (I/F Board), I/F Cable,

 

Menu Setting

 

 

 

 

 

 

 

 

 

6 – 1

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Oki 3390, Microline Printer, 3391 Troubleshooting and Repair, Items to Check Before Repair, Troubleshooting Table

3390, Microline Printer, 3391 specifications

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