Precautions in replacing the Size Sensor and the SC PCB
□ When replacing the Document Detect Sensor（269、275）and the SC PCB（1901）, follow the procedures below
to adjust the Document Detect Sensor.
□ Before adjusting the Document Detect Sensor
A. When the ADF/iADF Unit or the Platen Cover is installed
1. Open the ADF/iADF Unit or the Platen Cover.
2. Clean the white part of the Scanning Pad and the Scanning Glass with a soft cloth, soaked with isopropyl
alcohol.
3. Close the ADF/iADF Unit or the Platen Cover.
B. When the ADF/iADF Unit or the Platen Cover is not installed
1. Clean the Scanning Glass with a soft cloth, soaked with isopropyl alcohol.
2. Place A3/LEDGER recording paper or 2 A4/LETTER recording papers or 4 A5/INVOICE recording papers
on the Scanning Glass aligning on the upper left corner.
Note: Use the unused white recording paper.
- How to set the recording paper -
(a) When setting A3/LEDGER recording paper (b) When setting 2 A4/LETTER recording papers
(c) When setting 4 A5/INVOICE recording papers
□ Procedures for adjusting the Document Detect Sensor.
1. Press the “FUNCTION”, “ORIGINAL SIZE (LEDGER/A3)”, and the “3” keys simultaneously.
2. Input the Password, and select the “OK” button to enter the Service Mode (default password is
00000000).
3. In “Self Test ”, press Key “8” on the keypad.
4. Press “START”.
5. Select No.12 “Org. Size Sensor Adj.”
6. Press “START”.
7. The Xenon Lamp automatically turns ON, activating the Platen Mechanical Parts.
After a specified time, the Xenon Lamp turns OFF, inactivating the Platen Mechanical Parts and the display
returns to “F8” “Service Adjustment” mode.
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