Skew; Intelligibility; Copy Test - Ricoh FACSIMILE FAX77 Field Service Manual

1. Copy Density
Density must be equal in the left, right, and center. If it is not, adjust the shading plate position (see "Flat-
ness" on page 3-15).

2. Skew

Copy a test chart using standard resolution.
The difference between A and B (see the diagram on page 5-1) must be as follows.
A4 [8.5" x 11.7"] or larger: Less than 1% of the document length
Smaller than A4: Less than 3% of the document length
To correct skew, see page 5-8.

3. Intelligibility

Copy a test chart using standard resolution. Check the characters in frame F (see page 5-1). No charac-
ters must be missing. If some of the characters are illegible, check and adjust the following: flatness (see
page 3-15), reduction rate (see page 3-17), focusing (see page 3-16).

4. Copy Test

Make another copy. If the copy is still defective, make a printer test (see page 2-28) and check the video
waveforms if necessary (see pages 3-13 to 3-19).
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