Toshiba e-STUDIO2330C Service Handbook page 364

< 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.
(8) Turn the power ON while [0] and [3] are pressed simultaneously.
(9) Press the [START] button.
(10) Check how items [G] and [H] are displayed while [7] is pressed.
(11) Press the [CLEAR] button.
(12) Key in "125", then press the [START] button. (03-125: Sensor shutter is opened)
(13) Key in "126", then press the [START] button. (03-126: Image position aligning sensor / LED ON)
(14) Press the [START] button.
(15) Check how items [G] and [H] are displayed while [7] is pressed.
(16) 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 -
(17) Press the [CLEAR] button.
(18) Key in "176", then press the [START] button. (03-176: Image position aligning sensor / LED OFF)
(19) Key in "175", then press the [START] button. (03-175: Sensor shutter closed)
(20) Turn the power OFF.
(21) If the image position aligning sensors on both sides are operating normally, proceed to step (23).
In other cases, proceed to step (22).
(22) Check the following items if the image position aligning sensors are not operating normally:
Is the connector CN337 on the LGC board disconnected?
Is the connector of the image position aligning sensor disconnected?
Is the harness between the LGC board and the image position aligning sensor broken?
Is the light emitting or receiving area of the image position aligning sensor stained with toner?
Are the sensor shutter and the image quality sensor opening or closing normally? Or are they
damaged?
Is the light emitting area of the image position aligning sensor emitting LEDs?
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e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
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.
< Checking procedure for the sensor shutter opening/closing status >
1. Take off the transfer belt unit so that the sensor unit can be seen.
2. Turn the power ON while [0] and [3] are pressed simultaneously.
3. The shutter should be opened when "125" is keyed in. It should be
closed when "175" is keyed in.
< Checking procedure for the LED emission of the image position aligning
sensor >
1. Key in "125" to open the sensor shutter.
2. The light emitting area of the sensor should emit LEDs when "126" is
keyed in.
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