Ricoh C226 Service Manual page 247

TROUBLESHOOTING
Are you using the new VT master? (more sensitive)
Yes
No
Use the VT master.
Has the platten roller been mounted correctly on the thermal head?
Yes
No
Tighten the two knobs securing the platten roller and
adjust the platten roller pressure evenly.
Make prints in Test Pattern mode and check the image.
Does the same problem still occur with the test pattern?
Yes
No
CIS or main board is defective.
Thermal head, or main board is defective.
C226 6-2 SM