Panasonic KV-S1027C, Service Manual

Page: 57 / 255

57
Scanned image data
have black lines,
white lines, or darker
image than the
original) 1. Shading data stored in
CONTROL board is not proper
to perform an image process.
1.
Perform the "Shading" in Sec.
Adjustment
(
P.50
) to
over-write new data.
2. The dust exists on the Scanning
Glass ((F) or (B)) or its
surrounding (Reference area or
others). 1. Wipe off the dust with soft and dry cloth.
3. Problem with Pixel data from
CIS (F) or from image
processing circuit
For S1057C, SL1066 1. Check the connection and soldering condition of the
following parts.
(1) between CIS (F) and CN1 (CONTROL Board)
2. Check the soldering condition of the following parts
and their surrounding circuits on the CONTROL
Board.
(1) IC2 (AFE)
(2) R23, R645, R643, R641, R27, R28
3. Monitor the following CIS Timing signals on the CN1.
(1) CLK: See Fig. 10.1.1.
(2) SI : See Fig. 10.1.2.
4. Replace faulty parts or boards.
3. Problem with Pixel data from
CIS (F) or from image
processing circuit
For S1027C, SL1056, SL1055
SL1036, SL1035
1. Check the connection and soldering condition of the
following parts.
(1) between CIS (F) and CN1 (CONTROL Board)
2. Check the soldering condition of the following parts
and their surrounding circuits on the CONTROL
Board.
(1) IC2 (AFE)
(2) R23, R27, R28
3. Monitor the following CIS Timing signals on the CN1.
(1) CLK: See Fig. 10.1.1.
(2) SI : See Fig. 10.1.2.
4. Replace faulty parts or boards.
4. Problem with Pixel data from
CIS (B) or from the image
processing circuit
For S1057C, SL1066 1. Check the connection and soldering condition of the
following parts.
(1) between CIS (B) and CN2 (CONTROL Board)
2. Check the soldering condition of the following parts
and their surrounding circuits on the CONTROL
Board.
(1) IC3 (AFE)
(2) R24, R25, R26, R647, R649, R651
3. Monitor the following CIS Timing signals on the CN2.
(1) CLK : See Fig. 10.1.1.
(2) SI : See Fig. 10.1.2.
4. Replace faulty parts or boards.
4. Problem with Pixel data from
CIS (B) or from the image
processing circuit
For S1027C, SL1056, SL1055
SL1036, SL1035 1. Check the connection and soldering condition of the
following parts.
(1) between CIS (B) and CN2 (CONTROL Board)
2. Check the soldering condition of the following parts
and their surrounding circuits on the CONTROL
Board.
(1) IC3 (AFE)
(2) R24, R25, R26
3. Monitor the following CIS Timing signals on the CN2.
(1) CLK : See Fig. 10.1.1.
(2) SI : See Fig. 10.1.2.
4. Replace faulty parts or boards.
When you scan
short documents,
the sound made by
paper being ejected
will be higher than. If the length of a document is less
than about 148 mm, feeding speed
control will be activated for exiting
documents; this is normal behav-
ior. This is normal operation.
Symptom Possible Cause Check Point Remarks