Hioki 8804, Instruction Manual

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14.5 Cleaning the Printer Head
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14.5 Cleaning the Printer Head
The maintenance of the printer is not especially required.
However, depending upon the conditions of use, and
especially if the printer has been used over a long period
of time, it is possible for dirt or paper dust to adhere to
the printer thermal head, causing the printing to be faint
or otherwise indistinct. If this occurs, use one of the
following procedures to clean the printer head.
Method 1
1. In the recorder function mode, set the high speed range of
2 s/DIV.
2. On the system screen (page 1), check that the
intermittent printing "thin out" is set to OFF. If ON, it
has no effect.
3. Increase the input noise, so as to print for at least 5
seconds in solid black (100% black) or repeat solid
printing for several times with the PRINTER check (refer
to Section 12.4.3, "Self Check").
4. If this does not effect enough improvement, then try
method 2.
Method 2
1. Moisten a piece of recording paper with a solvent such as
anhydrous alcohol or freon or normal hexane. (Use back
of the recording paper.) Then insert it into the printer.
2. After lowering the head up lever, move the recording
paper to and fro manually, so as to clean the head.