Ricoh A109 Service Manual page 265

SC354: Bk-TD sensor gain adjustment error
SC355: Y-TD sensor gain adjustment error
SC356: M-TD sensor gain adjustment error
SC357: C-TD sensor gain adjustment error
- Definition - [B]
When adjusting TD sensor gain during the toner density initial setting,
Vcnt (output voltage) does not reach a value between 7 and 11 V.
<Possible causes>
•
Main control board defective
SC360: Development bias leak
- Definition - [B]
Development bias leak signal is detected for more than 3 seconds.
<Possible causes>
•
Sleeve roller receptacle damaged
•
High voltage supply board - B defective
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 (accident)
A109 6-10 FSM