Panasonic KX-FB423CN Manual page 292

6.5.5.7. AN ABNORMAL IMAGE IS COPIED
CROSS REFERENCE:
WHITE PLATE AND SCANNER GLASS (P.22)
HOW TO REMOVE THE SCANNER GLASS UNIT, CIS AND PAPER TRAY BLOCK (P.45)
HOW TO REMOVE THE CARRIAGE MOTOR AND SCAN MOTOR DRIVE BOARD (P.46)
CIS (Contact Image Sensor) SECTION (P.112)
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KX-FB423CN