P-31: Pc Home Sensor (K) Malfunction - Olivetti d-Color MF651 Service Manual

18. MALFUNCTION CODE
18.3.16

P-31: PC home sensor (K) malfunction

K PC encoder sensor/1 (PC45)
K PC encoder sensor/2 (PC46)
Step
1 Perform the faulty sensor check procedure. *1
Check the sensor, for which a faulty condition has been checked, for installed position and
2
proper connector connection.
3 Wipe the sensor, for which a faulty condition has been checked, clean of dirt if any.
4 If P-31 persists, change the transport drive assy.
5 Change PRCB.
*1: Faulty sensor check procedure
1. Open the lower front door and turn ON the main power switch of the machine.
2. Call the [Sensor Check] screen to the screen by way of Service Mode.
For details how to display, see "Adjustment /Setting."
See P.552
3. Close the lower front door and start [Stabilizer].
4. During the stabilizer sequence, check to see if the values of the phase detection sen-
sors (K PC encoder sensor/1 and K PC encoder sensor/2) change.
5. A sensor is faulty if its value does not change.
18.3.17 P-32: Heating roller temperature sensor /1 temperature detection failure
Fusing unit
Step
1 Wipe the TEMS1 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 TEMS1 for installed position and proper connector connection.
3 Check the connection of the fusing unit.
4 Change TEMS1.
5 Change fusing unit.
714
Relevant parts
Transport drive assy
Printer control board (PRCB)
Action
Relevant parts
Heating roller temperature sensor/1 (TEMS1)
Action
Service Manual
Field Service Ver. 2.0 Jul. 2009
Y110571-1