FujiFilm CR-IR341 Service Manual page 879

C 1 2
ONTENTS
10.10 10. VIRTUAL IMAGE: Setting in Virtual Generation Mode for
Image Signal
When an abnormal image occurs, a quasi-reading image is used to isolate its cause. When
this item is set and then IP conveyance is performed, a virtual image may be read and
outputted to film.
NOTES
• To obtain a quasi-reading image, set either "1. LIGHT", "2. LOG AMP", or "3. SCN08 IN-
PUT" and then return to the routine screen, before performing IP reading.
• After the quasi-reading is completed, be sure to select "4. ROUTINE" to cancel the quasi-
reading mode.
• Judging from the virtual image, isolate the cause of the abnormal image.
SUPPLEMENTARY NOTE
• For PMT electrical input quasi-reading (LOGAMP), HV is forced to OFF. Thus, a "HV-OFF warning"
occurs when exiting M-Utility. However, it is not an error. So, press the CONFIRM button and
proceed with the operation.
• For PMT electrical input quasi-reading (LOGAMP), a completely different signal than a normal X-ray
image is inputted as a quasi-image signal. Thus, minute flickering, which will not pose any problem
for a typical image, may appear as nonuniformity, depending on image processing requirements.
Even if nonuniformity occurs as a result of quasi-reading, no nonuniformity is often found on a
typical X-ray image.
If any nonuniformity is found during quasi-reading, adjustment should be made with a usual X-ray
image.
• The IP conveyed should be completely erased. ID information and so forth should also be regis-
tered in a similar manner to the routine processing.
1. LIGHT: Virtual Image for Injecting Virtual Light of LED into Photomultiplier (LED
on PMT Board)
(1) Select "1. LIGHT".
The following message appears.
INPUT THE LED'S LUMINESCENCE QUANTITY.
1. EQUIVALENT TO 2-3[microR]
2. EQUIVALENT TO 2-3[mR]
1 - 2 :
Meaning: Enter the luminescence quantity of the LED.
(2) Type in a value either "1" or "2".
The luminescence quantity of the LED is set, with the following message displayed.
THE SPECIAL MODE FOR VIRTUAL IMAGE IS SET.
Meaning: The quasi-reading mode is now set.
2. LOG AMP: Virtual Image for Inputting Fixed Current into PMT Board (VH OFF on
PMT)
Select "2. LOG AMP".
The following message appears.
THE SPECIAL MODE FOR VIRTUAL IMAGE IS SET.
Meaning: The quasi-reading mode is now set.
009-051-05
11.20.99 FM2638
3 4 5 6
"3. Troubleshooting Procedures Based on Abnormal Images" in
Troubleshooting Volume
CR-IR341 Service Manual
7 8 9 10
MU - 88
MU - 88