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<Button and LCD test procedures> In the button and LCD test mode, perform the following to confirm the operation of the buttons and the LCD. MP170: 1) Press the Stop/Reset button. The LCD color changes and displays a full black screen. 2) Press the Stop/Reset button again. "SCSPM-+OKBLRF" is displayed. 3) Each text displayed on the LCD is assigned to represent each button as follows (from left to right): Photo Index Sheet, COPY, SCAN, MEMORY CARD, Menu, -, +, OK, Back, Black, Color, Stop/Reset, ON/OFF Press each button, and confirm that the corresponding text on the LCD is disappeared. 4) When all the buttons are pressed and recognized properly, "PASS" is displayed on the LCD, and no further button operation is accepted. 5) Open the scanning unit. Only the Power button is enabled. 6) Press the Power button. The machine exits the test, and returns to the service mode menu selection. MP450: 1) Press the Stop/Reset button. The LCD color changes and displays a full blue screen. 2) Press each button on the operation panel (except the Power and Stop/Reset buttons). The color of a portion corresponding to the pressed button changes to red. For each portion of the display and its corresponding button, see the diagram below. (The diagram is a sample when the right and left cursor buttons are pressed.) === LCD ===
3) When all the buttons excluding the Power and Stop/Reset buttons are pressed, the entire LCD changes to a full red screen. 4) Open the scanning unit to display the color pattern.
5) Press the Power button to return to the service mode menu selection.
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<Part 1: 3. REPAIR, 3-3 (5) to (7)>
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