Image Problem Isolation Procedures and Remedies
When an Error Occurs
First, confirm the relationship between the encountered error and image problem. Then, eliminate
the cause of the error without regard to the image problem.
When No Error Occurs
Step 1: Determine whether the problem occurred on the SP side or LP side. For this purpose, the
execution of Procedures 1) to 4) is effective.
Step 2: If the scanner is suspected of having caused the problem, perform checkout with the
image processing section tester. However, the tester may indicate that two or more circuit
boards are faulty or fail to formulate a defect judgment. Therefore, you should perform the
following analysis procedures while using the tester.
When a reproducible image problem is encountered, isolate it by performing Procedures
A. to 11). If the encountered image problem is not reproducible, make an estimate with the
image problem samples.
1) When the printer is obviously faulty, make calibration and test pattern prints and examine the
results.
REFERENCE: Test pattern prints will be written into the FMB20 board by the CPU on the
printer's CTL20 board.
Normal ® You can judge that the printer's FMB20 board read section and subsequent
components, part of the FMC20 board, AOM driver, and laser unit are normal. ®
Proceed to perform Procedure 2).
Abnormal ® The printer's FMB20 board and subsequent components may be faulty.
(1) The calibration print is abnormal.
--> The FMC20 board, AOM driver, or laser unit is abnormal. If either the G color or B color is abnormal: Interchange the G and B AOM driver input coaxial cables to check for a color abnormality change and phenomenon change. The abnormal color remains unchanged. --> The AOM driver or subsequent component is faulty.The abnormal color changes. ® The FMC20 board may be faulty.
NOTE: Resulting B/G print location changes are normal.
CAUTION: The R color cable cannot be repositioned even when the R color is abnormal (the R signal serves as the SOS reference signal). Return the AOM driver input coaxial cables to their original positions and then interchange the G and B AOM driver output coaxial cables. The abnormal color remains unchanged. ® The AOM driver and preceding components are normal. The other components may be faulty. The abnormal color changes. ® The AOM driver is faulty.
(2) The calibration print is normal, but the test pattern print is abnormal.
--> You can conclude that the AOM driver and laser unit are normal. It is highly
probable that the FMC20 or FMB20 board may be faulty.
B. Perform the multiple-printing procedure from the scanner.
All the multiple prints are equally abnormal.
--> The FMB20, FMC20, and FMA20 boards in the printer may be faulty.
The multiple prints are not equally abnormal (or some prints are normal and the others are
abnormal).
--> The printer's FMB20 board and subsequent components (e.g., FMB20 board, FMC20 board,
AOM driver, and laser unit) may be faulty.
3) In both the vertical feed and horizontal feed modes, make prints at the same print size setting
while varying the paper size or make prints at differing print size settings.
The abnormality varies (in position, pattern, or degree). --> The printer (FMA20, FMB20, and
FMC20 boards) may be faulty.
The abnormality remains unchanged (the image pattern's relative position remains the same).
--> The scanner may be faulty.
4) The abnormality arises whenever about 20 L size prints have been made. --> The FMB20 board
may be faulty. The problem is attributable to a certain memory area.
5) Check whether the abnormality found on the obtained prints are also found on index prints.
Yes --> The scanner (GFM20 board and subsequent components are normal), CCD, CCD20
board, CDS20 board, GFM20 board, and GMB20 (GMC20) board may be faulty.
No --> The GFM board and subsequent components are suspected of being faulty. It is
conceivable that the GIP20, GMB20 (GMC20), and GLO20 boards may be faulty.
6) The non-image area of index prints is also abnormal.
--> The GIP20 board and preceding components are normal, including the GMB20 (GMC20)
board, GLO20 board, and 1394 interface cable.
7) Check the DSC print/negative print.
The DSC print is abnormal. ® The GIP20 board and preceding components are normal (the
CCD, CCD20, CDS20, GFM20, and GIP20 boards are normal).
The DSC print is normal. ® The GLO board and subsequent components are normal (the
GIS20 and GLO20 boards and the printer are normal).
8) There is an abnormality in the image (fine-scanned image) that is displayed on the monitor with
the red-eye correction. ® The GFM20 board and preceding components may be faulty (the
CCD, CCD20, CDS20, GFM20, or GMB20/GMC20 board is faulty).
9) The abnormality is cleared when the carrier is replaced. --> The carrier is faulty.
10) The abnormality is cleared when the film is changed. --> The scanner and film may be faulty
(including the CCD, CCD20, CDS20, GIP20, GMB20/GMC20, and PC software).
11) The magnification of the abnormality changes when you change the print magnification (e.g.,
cropping). --> The GFM20 board and preceding components may be faulty.