SIGNAL FLOW
OKIFAX 5700/5900
A2 - 18
A2.2
Explanation of Signal Flowchart
(1) Copy Mode
The analog data output from the image sensor is input to the MCNT-PCB to be ampli-
fied by the amplifier. The amplified analog data is input to the scanner controller.
Next, the analog data is converted to digital data by the built-in A/D converter. The
digital data is corrected by the internal correction function, transferring binary-coded
data to the IOGA5 every eighth pixel. The data input to the IOGA5 is temporarily
written into the external DRAM (4 megabits x 16 bits). The written data is sent, through
the IOGA5, to the LED head in sync with the print operation.
(2) G3 Send Mode (MH/MR/MMMR Codes)
The analog data output from the image sensor is input to the MCNT-PCB to be ampli-
fied by the amplifier. The amplified analog data is input to the scanner controller.
Next, the analog data is converted to digital data by the built-in A/D converter. The
digital data is corrected by the internal correction function, transferring binary-coded
data to the IOGA5 every eighth pixel. The data input to the IOGA5 is temporarily
written into the external DRAM (4 megabits x 16 bits). The written data is converted to
MH/MR/MMR codes by firmware, then written into the external DRAM again.
The converted data is sent to the modem board to be modulated. The data modulated
by the modem is sent to the NCU board by the Send signal “S.” The data sent to the
NCU board is amplified there, then output to the public line.
(3) G3 Receive Mode (MH/MR/MMR Codes)
The signal input from the public line to the NCU board is amplified, input to the modem
board as an R signal, demodulated by the modem, and written into the DRAM on the
MCNT PCB.
MH/MR/MMR-code data is converted to image data by firmware and written into the
DRAM again. The written data is sent, through the IOGA5, to the LED head in sync
with the print operation.
(4) G3 Receive Mode (JBIG Code)
The signal input from the public line to the NCU board is amplified, input to the modem
board as an R signal, demodulated by the modem, and written into the DRAM on the
MCNT PCB.
JBIG-code data is sent to the JBIG control LSI chip to be converted to image data.
Then, the image data is written into the DRAM.
The written data is sent, through the IOGA5, to the LED head in sync with the print
operation.
(5) G3 Send Mode (JBIG Code)
The analog data output from the image sensor is input to the MCNT-PCB to be ampli-
fied by the amplifier. The amplified analog data is input to the scanner controller.
Next, the analog data is converted to digital data by the built-in A/D converter. The
digital data is corrected by the internal correction function, transferring binary-coded
data to the IOGA5 every eighth pixel. The data input to the IOGA5 is temporarily
written into the external DRAM (4 megabits x 16 bits). The written data is converted to
MH/MR/MM codes by firmware, then written into the external DRAM again.
The converted data is sent to the JBIG control LSI chip to be converted to JBIG codes.
Next, the JBIG-code data is sent to the modem board to be modulated. The data
modulated by the modem is sent to the NCU board by the Send signal “S.” The data
sent to the NCU board is amplified there, then output to the public line.
Summary of Contents for OKIFAX 5700
Page 6: ...CHAPTER 1 GENERAL INFORMATION ...
Page 90: ...CHAPTER 2 INSTALLATION PROCEDURE ...
Page 102: ...OKIFAX 5700 5900 2 12 3 Document stacker Hang the document stacker onto hanging position ...
Page 204: ...OKIFAX 5700 5900 2 114 Typical Transmission flow ...
Page 205: ...OKIFAX 5700 5900 2 115 Typical Reception flow ...
Page 210: ...CHAPTER 3 BRIEF TECHNICAL DESCRIPTION ...
Page 218: ...CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY ...
Page 223: ...OKIFAX 5700 5900 4 5 Appearance of the OKIFAX 5700 5900 ...
Page 248: ...CHAPTER 5 ADJUSTMENTS ...
Page 252: ...CHAPTER 6 CLEANING AND MAINTENANCE ...
Page 278: ...CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5700 5900 ...
Page 390: ...C34 OKIFAX 5700 5900 A3 40 IC201 Pin Assignment ...
Page 405: ...Appendix B DescriptionsofPrintOperation ThirdEdition December 1998 Oki Data Corporation ...
Page 427: ...Appendix C Not used at this time ...
Page 430: ...OKIFAX 5700 5900 D 1 Section 1 CABINET ASSEMBLY ...
Page 432: ...OKIFAX 5700 5900 D 3 Section 2 CONTROL PANEL ASSEMBLY ...
Page 434: ...OKIFAX 5700 5900 D 5 Section 3 PRINTER ASSEMBLY 53 54 ...
Page 437: ...OKIFAX 5700 5900 D 8 Section 4 BASE ASSEMBLY ...
Page 439: ...OKIFAX 5700 5900 D 10 Section 5 FRAME ASSEMBLY SCANNER L ...
Page 441: ...OKIFAX 5700 5900 D 12 Section 6 FRAME ASSEMBLY SCANNER U ...
Page 443: ...OKIFAX 5700 5900 D 14 Section 7 CABLES OPTION BOARDS ...
Page 445: ...Appendix E Not used at this time Oki Data Corporation ...
Page 446: ...Appendix F Not used at this time Oki Data Corporation ...
Page 447: ...Appendix G PC Loading FirstEdition February 1999 Oki Data Corporation ...
Page 465: ...Appendix H RMCS SYSTEM MANUAL For Model 30 FirstEdition Oki Data Corporation ...
Page 466: ......