Toshiba e-STUDIO6520C Service Handbook page 490

(10) Check the displayed value. (05-4720-1: Displaying the cause of image position alignment
detection error center side.)
When the error [CA00] occurs, the value between 1 and 85 is displayed. (0: Detection
normality on the center side)
(The statues of total 4 sections (4 colors on the front and rear sides) are displayed.)
1 : Y on the center side detection abnormality (*3)
4 : M on the center side detection abnormality (*3)
16 : C on the center side detection abnormality (*3)
64 : K on the center side detection abnormality (*3)
85 : All colors on the center side detection abnormality
Other than the above: Multiple colors detection abnormality
(*4) The adjustment value is the sum of (*3), which, as in the example below, specifies the
cause of the detection abnormality.
(E.g. 1) 05-4720-0 --- in case of 65
65 = 64 + 1
-> K on the rear side / Y on the front side detection abnormality
(11) If the adjustment value fits (I) in step 7 or 10, proceed to step (12). In other cases, proceed to
step (30).
< Checking the status of the image position aligning sensor >
Check if the light emitting area of the image position aligning sensor emits LEDs and if the reflected
lights on the transfer belt surface are detected by the light receiving area of the image position aligning
sensor.
(12) Turn the power ON while [0] and [3] are pressed simultaneously.
(13) Press the [START] button.
(14) Check how items [G] and [H] are displayed while [8] is pressed.
(15) Check how items [G] is displayed while [9] is pressed.
(16) Press the [CLEAR] button.
(17) Key in "118", then press the [START] button. (03-118: Sensor shutter is opened)
(18) Key in "117", then press the [START] button. (03-117: Image position aligning sensor / LED ON)
(19) Press the [START] button.
(20) Check how items [G] and [H] are displayed while [8] is pressed.
(21) Compare them with the statues of [G] and [H] displayed in step 10.
Both [G] and [H] are changed -
[G] remains same
[H] remains same
Both [G] and [H] remain same -
(22) Check how item [G] is displayed while [9] is pressed.
(23) Compare it with the statue of [G] displayed in step 15.
[G] is changed
[H] remains same
e-STUDIO5520C/6520C/6530C
ERROR CODE and TROUBLESHOOTING
The image position aligning sensors on both
sides are operating normally.
- The image position aligning sensor on the rear
side is not operating normally.
- The image position aligning sensor on the front
side is not operating normally.
The image position aligning sensors on both
sides are not operating normally.
- The image position aligning sensor on the
center side is not operating normally.
- The image position aligning sensor on the
center side is not operating normally.
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-> (I)