Canon multipass c3000 Service Manual (en)

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5.3.4 Paper feed section
a) General precautions
Setting the paper size
For fax operations, the user sets the paper size with the MultiPASS Desktop Manager
for Windows.  The unit cannot detect the paper size automatically.  Therefore, if the
paper size is altered during servicing, be sure to set it back to the user’s paper size
setting.
If the paper size setting does not match the size of the paper installed. One
of the following two operations will be executed:
(A)
If the paper size setting is the same or smaller than the actual size of
the paper installed, the following will be executed:
The document will be printed to fit the length of the paper size that
has been set.
Even if the paper size setting is smaller than the actual paper size,
printing will be executed and no error will result. Depending on the
document, large blank areas may result on the printout.
(B)
If the paper size setting is larger than the actual paper size, the
following will be executed:
As with (A), the document will be printed to fit the length of the paper
size that has been set. Since the actual paper size is shorter than the
paper size setting, the document's contents would be broken up to fit
the paper size setting. 
"CHECK PAPER"
will therefore be displayed
and printing will be canceled.
5.3.5 Control boards
a) Hardware switch and adjustable volume
• The SCNT board’s volume resistor VR1 has been factory-adjusted.  Service personnel are
not to alter its setting.
• The power supply unit’s adjustable volume VR101 has been factory-adjusted.  Service
personnel are not to alter its setting.
Regarding the hardware switch for servicing, refer to 
Chapter 3: 5.1
Hardware Switches on Page 3-31
.
b) Replacing the SCNT board
The SCNT board stores the user data, service data, and other data.  Therefore, when
replacing the SCNT board, print out the stored data and then enter this data into the new
SCNT board.
The SCNT board replacement precaution is described in 
“5.4.4 SCNT board
replacement precautions” on Page 1-51
.
Part 1: Facsimile
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