Scanner Drive - Ricoh B230 Service Manual

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6.3.2 SCANNER DRIVE

The scanner motor [A] drives the 1st scanner [B] and the 2nd scanner [C] through the

scanner drive pulley, scanner drive shaft [D], and two scanner wires [E].

The SBU board controls the scanner drive motor. The 2nd scanner speed is half that of the

1st scanner.

In reduction or enlargement mode, the scanning speed depends on the magnification ratio.

The returning speed is always the same, whether in full size or magnification mode. The

image length change in the sub scan direction is done by changing the scanner motor

speed. In the main scan direction it is done by image processing on the BICU board.

You can adjust the magnification in the sub-scan direction by changing the scanner motor

speed with SP4-008.

The scanners always stay in their home position (the scanner HP sensor [F] detects the 1st

scanner) to scan the original. The ARDF motor feeds the original through the ARDF. In

reduction/enlargement mode, the image length change in the sub-scan direction is done by

changing the ARDF motor speed. Magnification in the main scan direction is done in the

BICU board. This is the same as for book mode.

You can adjust magnification in the sub-scan direction by changing the ARDF motor speed

with SP6-017.

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