Other Errors; Drum Surface Potential Sensor Control Related Troubleshooting - Toshiba e-STUDIO 5540C Service Manual

8.4

Other errors

8.4.1

Drum surface potential sensor control related troubleshooting

Countermeasure when "Service Recommended for SPC" message is displayed
Notes:
Since the surface potential sensor is installed in the K station in e-STUDIO6550C/6570C only,
the following measures will be taken.
If the EPU tray with the surface potential sensor is used for all stations individually, refer to "25. 4.
1 Drum surface potential sensor control related troubleshooting" in the Service Manual for
e-STUDIO5520C/6520C/6530C.
[ 1 ] Check the control setting of Drum surface potential (VO) sensor
[ 1-1 ] Check that 08-2561 (Drum surface potential control setting) is set to "2".
Notes:
For e-STUDIO5540C/6540C and e-STUDIO5560C/6560C in which no VO sensor is installed, "0"
is set for 08-2561.
[ 2 ] Check for abnormal contents (V0 sensor controlling / V0 sensor shutter closing)
and abnormal stations.
[ 2-1 ] Check the drum surface potential sensor controlling status: 05-2780 Sub-code 3: K.
0: Normally completed
1: Control paused
(due to an open cover, etc.)
2: Sensor abnormality detected
[ 2-2 ] Check the drum surface potential sensor shutter closing controlling status?05-2789
Sub-code 3: K
0: Normally completed
1: Control paused
(due to an open cover, etc.)
2: Sensor shutter closing abnormality detected
* When any of the drum surface potential sensor controlling statuses is "2: Sensor abnormality
detected"  Go to 3.
* When any of the drum surface potential sensor shutter closing controlling statuses is "2: Sensor
shutter closing abnormality detected"  Go to 4.
[ 3 ] What to do for the drum surface potential sensor controlling status abnormality
Content: Incorrect measurement when the drum surface potential sensor shutter is opened
<Example>
The harness of the drum surface potential sensor is disconnected.
The drum surface potential sensor shutter is not opened.
The drum surface potential sensor is installed incorrectly.
Charging of the photoconductive drum is abnormal (e.g. abnormalities in the drum, main
charger, discharge LED, HVT board).
Are the harnesses of the troubled drum surface potential sensor connected? Are the boards
connected with the sensor correctly?
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ERROR CODE and TROUBLESHOOTING
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