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5. Relation of Each Sensor Error Indication
a) NO RIBBON
Detection sensor : Ribbon cassette sensor (photo interrupter)
Cause
: Sensor does not detect ribbon cassette.
Symptom
: 1. Ribbon cassette is not inserted.
2. Ribbon cassette is not inserted correctly or ribbon cassette was pulled out
3. Sensor defective
4. Mechanism section which interrupts the photo interrupter does not
b) NO PAPER
Detection sensor : Paper size sensor 0, 1 or 2 (Photo interrupter)
Cause
: Sensor does not detect paper.
Symptom
: 1. Paper feed tray is not inserted.
2. Paper feed tray is inserted halfway.
3. No paper is inserted.
4. Sensor defective
5. Mechanism section which interrupts the photo interrupter does not operate
6. Paper is curl largely.
c) RIBBON and PAPER MIS-MATCH
Detection sensor : OHP sensor (Interructive type) and bar-code sensor (Reflection type)
Cause
: A kind of paper detected by ribbon cassette and a kind of paper detected by bar-
code sensor are not coincide.
Symptom
: 1. A kind of ink ribbon and a kind of paper are not coincide.
2. Either sensor defective
3. Threshold value defective of either sensor
4. Bar-code ring defective
d) END OF RIBBON
Detection sensor : Take up FG sensor (Photo interrupter) and Supply FG sensor (Photo interrupter)
Cause
: It was judged that ribbon is stopped by both FG sensors during beginning
detection of ribbon.
Symptom
: 1. Ribbon is ended.
2. Ribbon is jammed.
3. Take-up ribbon motor does not operate.
4. Sensor defective.
4-18
during printing.
operate smoothly.
smoothly.
UP-D70XR
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