C392A (bizhub C754/C654)
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Contents
| Trouble type | Heating roller temperature sensor contamination (Center of the heating roller) |
| Trouble code | C392A |
| Rank | A |
| Detection timing | While checking the contamination on the heating roller temperature sensor, detected temperature of the heating roller thermistor/1 exceeded the detected temperature of the heating roller temperature sensor for over the predetermined value for the predetermined period of time. |
| Trouble isolation | – |
| Relevant electrical parts | -Fusing unit -Heating roller temperature sensor (TEMS2) -Heating roller thermistor/1 (TH1) -IH power supply (IHPU) -DC power supply (DCPU) -Printer control board (PRCB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Wipe the TEMS2 clean of dirt if any. | – | – |
| <Cleaning procedure> -Clear away a dirt or a foreign object on the sensor with a cotton swab. -When a dirt is left even if you cleaned the sensor by above procedure, clear away a dirt or a foreign object on the sensor using a cotton swab dampened with the alcohol. And, wipe off the sensor with a dry cotton swab afterwards. | |||
| 2 | Check the TEMS2 for installed position and proper connector connection. | – | – |
| 3 | Check the TH1 for installed position and proper connector connection. | – | – |
| 4 | Check the connection of the fusing unit. | – | – |
| 5 | Check the fusing unit, IHPU, PRCB and DCPU for proper connection and correct or change as necessary. | – | – |
| 6 | Replace the fusing unit (Part# A2X0R71011) | – | – |
| 7 | Replace PRCB (Part# A2X0H00102) | – | – |
- Link to the layout drawings for related parts by each trouble code (S.74. C392A)
K.3.8.11 (Link to the Field Service Manual)