Panasonic KV-S1025C SERIES Service Manual page 77

Symptom
Scanned image data 1. Shading data stored in CONTROL
have black line, white board is not proper to perform an
line, darker image than image process.
the original)
2. The dust exists on the Scanning
Glass ((F) or (B)) or its surrounding
(Reference area or others).
3. Problem with Pixel data from CCD
Board (F) or from image processing
circuit
4. Problem with Pixel data from CCD
Board (B) or from image processing
circuit
5. Lamp gets dark, or has almost
reached its life expectancy.
(only in case of a darker image.)
6. Lamp drive circuit (for Front) does
not work properly.
(only in case of darker image)
7. Lamp drive circuit (for Back) does
not work properly.
(only in case of darker image)
Possible Cause Check Point
1. Perform the "Shading" in Sec. 9.3.7 to over-write new data.
1. Wipe off the dust with the roller cleaning paper.
1. Check the connection and soldering condition of the
following parts.
(1) between CN2001 (CCD Board (F)) and CN1001
(CONTROL Board)
2. Check the soldering condition of the following parts and their
surrounding circuit on the CCD Board (F).
(1) IC2002
(2) IC2003
3. Check the soldering condition of the following parts and their
surrounding circuit on the CONTROL Board.
(1) IC1007 (Gate Array: especially 68th to 71st pins)
(2) IC1004, IC1005 (A/D Conv.)
4. Monitor the following CCD Timing signals on the CN1001.
(1) FCCD_TG: See Fig. 10.1.1.
(2) FCCD_CLK1: See Fig. 10.1.2.
(3) FCCD RS: See Fig. 10.1.3.
(4) FCCD CP: See Fig. 10.1.4.
5. Replace faulty parts or boards.
1. Check the connection and soldering condition of the
following parts.
(1) between CN2501 (CCD Board (B)) and CN1002
(CONTROL Board)
2. Check the soldering condition of the following parts and their
surrounding circuit on the CCD Board (B).
(1) IC2502
(2) IC2503
3. Check the soldering condition of the following parts and their
surrounding circuit on the CONTROL Board.
(1) IC1007
(Gate Array: especially 73rd, 74th, 79th, and 80th pins)
(2) IC1004, IC1005 (A/D Conv.)
4. Monitor the following CCD Timing signals on the CN1001.
(1) BCCD_TG: See Fig. 10.1.5.
(2) BCCD_CLK1: See Fig. 10.1.6.
(3) BCCD RS: See Fig. 10.1.7.
(4) BCCD CP: See Fig. 10.1.8.
5. Replace faulty parts or boards.
1. Perform the "CCD Level" test in Sec. 9.3.6 to check the
peak level.
2. Replace an applicable lamp. (Lamp (F) or Lamp (B))
1. Perform the "CCD Level" test in Sec. 9.3.6 to check the
peak level.
2. Check the Lamp Drive Board (F)'s soldering condition and
connection to the Lamp (F).
3. Replace the Lamp Drive Board (F).
1. Perform the "CCD Level" test in Sec. 9.3.6 to check the
peak level.
2. Check the Lamp Drive Board (B)'s soldering condition and
connection to the Lamp (B).
3. Replace the Lamp Drive Board (B).
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Remarks