Erasing The Screen - Kodak DirectView CR 825 Theory Manual

THEORY GUIDE
10DEC05
SCREEN. Both the number of lines and the number of samplings are set up in the
TG4825-1
Page calibration for that size of SCREEN.
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5 When the end of the scan is reached, the MSC BOARD A1 sends a status message to
the MCPU BOARD A2.
6 The MCPU BOARD A2 de-energizes the PMTs, GALVO, and the LASER.
7 The MCPU BOARD A2 sends a "Scan End" message to the INTERNAL PC. The TIMED
PROGRESS BAR displays until the image is transferred to the INTERNAL PC.

Erasing the SCREEN

1 The MCPU BOARD A2 sends an "Erase Plate" command to the MSC BOARD, which
sends a signal to the SLOW SCAN to start the erasing operation.
2 The SLOW SCAN MOTOR actuates and moves the SCREEN into the erase position,
determined by the counts of the SLOW SCAN ENCODER.
3 The SLOW SCAN MOTOR stops and waits for a response from the MCPU BOARD A2.
4 The MCPU BOARD A2 sends the "Erase" command and time to the MSC BOARD A1,
which actuates the ERASE LAMPS.
5 The ERASE LAMPS illuminate for 2 - 16 seconds to remove the image from the
SCREEN.
Note
The length of time the ERASE LAMPS illuminate is determined by the highest pixel code
value of the image that was scanned. If one pair of LAMPS is not operating, the time
increases by a factor of 2. If more than one pair of LAMPS is not operating, a message
displays on the TOUCH SCREEN MONITOR.
6 When the SCREEN is erased, the MSC BOARD A1 sends the "Erase Done" status to
the MCPU BOARD A2.
Sequence of Operation