Villa Rotograph EVO, Service Manual

Page: 165 / 223

SERVICE MANUAL
Troubleshooting
Rotograph EVO (Rev. 1) 8-74
•
Damaged films
–
Presence of scratches or residuals.
Possible cause:
The problems are probably due to the developer (ruler worn out
or dirty).
Remedy:
Check the developing machine, looking to scratches on ruler;
replace the developing liquids.
–
The film shows an unexposed area 10x50mm wide.
Possible cause:
In this case a cassette with patient identification window has
been used.
Remedy:
Use a cassette without the identification label.
•
The film shows spots similar to lightning
Possible cause:
They might be caused by electrostatic charges produced by the
intensifying screens or the scratching of the intensifying screens
against the film.
Remedy:
Check the humidity of the dark room and place the film into the
cassette without scratching it against the intensifying screen.