SC370: Bk-TD sensor upper detection abnormal
SC371: Y-TD sensor upper detection abnormal
SC372: M-TD sensor upper detection abnormal
SC373: C-TD sensor upper detection abnormal
- Definition - [B]
TD sensor output (Vt) exceeds 4.5 V during copy cycles.
- Possible causes -
• TD sensor defective
• Main control board defective
• Too much toner in the development unit (accidental)
SC374: Bk-TD sensor lower detection abnormal
SC375: Y-TD sensor lower detection abnormal
SC376: M-TD sensor lower detection abnormal
SC377: C-TD sensor lower detection abnormal
- Definition - [B]
TD sensor output (Vt) becomes lower than 0.5 V during copy cycles.
- Possible causes -
• TD sensor defective
• Main control board defective
• Toner supply system defective
Trouble -
shooting
SM 6-11 A172/A199
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