Sony UP-CX2, Service Manual

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2-2 (E)
UP-CX2
2-2. Thermal Head
n
When this unit is conveyed to maintenance service due to white streaks, the failure is not caused by a
defective thermal head, but it may be caused by adhesion of dust. Perform cleaning and printing check
before replacing a thermal head.
Working fl ow
1. Thermal head cleaning
2. Printing of the test pattern (16STEP)
3. Replacement of the thermal head
End
4. Setting of the thermal head resistance value
5. Printing of the test pattern (16STEP)
6. Comparing the test pattern in step 2 and step 5
7. Position adjustment of
thermal
head
7. Density adjustment
8. Resetting of head print history
Blur or faint
stripe appears.
Density differs.
Symptom
is cleared.
No trouble
Symptom still appears.
End