Kodak DirectView CR 825 Theory Manual page 101

THEORY GUIDE
10DEC05
GALVO BOARD
TG4825-1
Page
A4
101 of 120
PMT/DAS
BOARD A5
MSC BOARD A1
• A diagnostic program on the GALVO BOARD A4 checks the interface by
sending a command to the A/D CONVERTER on the GALVO BOARD
A4 to read the 2.5 V reference on the BOARD. This procedure
determines that the SERIAL INTERFACE to the GALVO BOARD A4 is
running and that the offset and amplitude values can be set for the size
of PLATE.
• The COUNTER on the GALVO BOARD A4 is checked.
– The MCPU BOARD A2 and DIGITIZER BOARD A3 start a scan
operation with the GALVO BOARD A4.
– If the GALVO BOARD A4 is operating correctly, the GALVO emits a
"Line Start" signal and a given number of lines of data are captured.
If it is not operating correctly, no "Line Start" signal occurs and only
one line of data is captured.
• The PMT/DAS BOARD A5 is set to "0" with the PMT high voltage de-
energized.
• The "coarse zero" adjustment is adjusted high.
• The output data is checked again for the correct increase.
• When the MSC BOARD A1 is energized, the boot program checks the
memory.
• In hardware, all interrupts are disabled and the SENSOR MASKS are
cleared.
• The SLOW SCAN AY is moved to the home position. The BOOT
PROGRAM locates the EXTRACTION BAR REFERENCE SENSOR S9
and moves the set number of counts of the ENCODER to the home
position.
• The DUPLEX CAM moves to the home position 1.
• The BAR CODE READER is initialized.
• CASSETTE ENTRY SENSOR S1 and CASSETTE LOAD SENSOR S2
are checked to determine if these SENSORS are blocked.
Logic and Control