FujiFilm ClearView CS, Service Manual

Page: 117 / 1404

CR-IR 363 Service Manual
MD-48
MD-48
011-202-11E
06.29.2012 FM6046
4. Descriptions of Scanner
Mechanism and Its Operation
u
NOTES
u
- "SCTxxx" is equivalent to SCT17B or SCT17P.
- "PMTxxx" is equivalent to PMT17A, PMT23A, PMT26A, or PMT27B.
- "PMRxxx" is equivalent to PMR17B, PMR23B, or PMR27B.
4.1 Descriptions of CR-IR 363 Scanner Operation
4.1.1 Scanner Controller Unit Operation Sequence
The H8CPU located on the scanner board (SCTxxx) controls the scanning optics
unit and photomultiplier, while communicating with the main CPU located on the
CPU board (CPU91A) board. Two H8CPU's are mounted on the scanner board
(SCTxxx), which are responsible for controlling the front side and back side of the IP,
respectively, when the both-side type IP is processed.
REFERENCE
The I/O names in the following sequence correspond to the I/O names in the
illustrations of the scanner controller unit, and are denoted in the form of:
m
I/O name; description of operation for that I/O name
[Example]
m
SCTxxx board; Correction data initial setting
This means that the SCTxxx board performs initial setting of the correction data.

Machine Power ON
m
SCTxxx board; Correction data initial setting
{MD:4.1.2 _Respective Correction Data}
m
SCTxxx board; Scanner self-diagnostics
{MD:4.1.5 _Error Detection/Processing Subsystem}

Cassette Loading
m
Cassette set unit barcode reader; Determination of whether the IP is of both-
side type or single-side type
(For the both-side type IP, IP information reading)
m
Polygon (POL); Start
Because the polygonal mirror takes time until it becomes stable since it is
activated, it is started earlier.
The polygon rotation speed is set corresponding to the IP type.
{MD:4.1.3 _Relationship between Subscan Motor Speed, Polygon Rotation
Speed, and IP Type/Reading Mode}

IP Moved to the Side-Positioning Conveyor Unit
m
Polygon (POL); Polygon diagnostics
{MD:4.1.5 _Error Detection/Processing Subsystem}
m
Housing conveyance sensors (SB5 and SG2); IP size measurement
m
Side-positioning conveyor unit barcode reader (BCR); acquisition of IP
information through IP barcode reading (only for the single-side type)
m
SCTxxx board; Conditions settings for main scan and subscan
Conditions are set according to a combination of the IP size, IP type, and the
reading mode that is preset with the CL.
m
Laser (LDD); ON

IP Moved to the Subscanning Unit
m
Subscanning motor (MZ1); Start
It is rotated at speed corresponding to a combination of the IP type and reading
mode.
{MD:4.1.3 _Relationship between Subscan Motor Speed, Polygon Rotation
Speed, and IP Type/Reading Mode}
m
Leading-edge sensor (SED); IP leading-edge detection
Reflection type (detects the laser light reflected from the IP)
m
PMTxxx board, PMRxxx board, SCTxxx board; Start of image reading
{MD:4.1.4 _Image Data Flow}
m
Subscanning unit grip drive motor (MZ2); Gripping/releasing of driving shaft/
driven shaft
In order to reduce nonuniformity during reading, the grip/release speed is allowed
to correspond to the speed of the subscanning motor.
m
PMTxxx board, PMRxxx board, SCN17A board; End of image reading
m
Laser (LED); OFF
m
Polygon (POL); Stop

IP Moved to the Post-Reading Conveyor Unit