%3.6 Explanation of Signal Flow for OKIFAX 1050/2350/2450
3.6 Explanation of Signal Flow for OKIFAX 1050/2350/2450
Note:
Regarding the difference of the signal flow between OKIFAX 1050 and OKIFAX 2350/2450, since
one-line scanning processing speed of OKIFAX 2350/2450 is faster in comparison with OKIFAX 1050, to
the circuit diagram of OKIFAX 2350/2450 has added the EXSEED (image processing LSI) and SRAM
(dark/light level correction data). Otherwise, the signal flow is almost the same as in OKIFAX 1050.
3.6.01 Copy Mode
Copy mode for OKIFAX 1050 Figure 3.7.1 shows the picture signal route in local copy mode for OKIFAX
1050
One-line picture data is transferred to A/D converter (analog/digital converter) from the scanning unit (CIS:
contact image sensor) as an analog data. After conversion from analog data to 6-bit digital data by A/D
converter, the picture data is sent to DRAM (line memory) via IOGA by DMA (Direct Memory Access).
Then the picture data is sent to IOGA again. Here, the picture data undergoes various kinds of picture
processings (IOGA and CPU), and is converted to two-level binary data (black and white). The one-line
binary data from IOGA is stored into DRAMs (page memory). When the data for one page has been
stored in the DRAMs, the data is read out from the DRAMs and sent to IOGA. The data is converted into a
serial data by the picture control of IOGA and transferred to the LED print head for printing as HDATA.
Writing of data into the page memory is also possible during the printing operation.
Copy mode for OKIFAX 2350/2450 Figure 3.8.1 shows the picture signal route in local copy mode for
OKIFAX 2350/2450
One-line picture data is transferred to A/D converter (analog/digital) via operational amplifier from the
scanning unit (CIS: contact image sensor) as an analog data. After conversion from analog data to 6-bit
digital data by A/D converter, the picture data is sent to EXSEED (image processing LSI) and SRAM.
Here, the picture data undergoes various kinds of picture processings (EXSEED and SRAM), converted to
two-level binary data (black and white) and then sent to IOGA (scanning control). The one-line binary
picture data from IOGA is stored into P-SRAM (pseudo-SRAM). When the data for one page has been
stored in the P-SRAM, the data is read out from the P-SRAM and sent to IOGA. The data is converted into
a serial data by the picture control of IOGA and transferred to the LED print head for printing as HDATA.
Writing of data into the page memory is also possible during the printing operation.
3.6.02 G3 Send Mode
Figure 3.7.4 (For OKIFAX 1050)/Figure 3.8.4 (For OKIFAX 2350/2450) show the G3 send picture signal
route
In the G3 mode, the data transfer route from the scan unit up to the DRAM (for OKIFAX 1050)/ P-SRAM
(for OKIFAX 2350/2450) is the same as in the copy mode described in 3.6.01.
The picture data for one-line is transferred from DRAM/P-SRAM to CPU. The CPU performs the picture
data processing (encode) for this picture data (FILLER, fill bits are inserted) and again stored into the
DRAM/P-SRAM. The stored encoded data is output from DRAM/P-SRAM to the MODEM under the
control of CPU. After modulation, the picture signal S (TXOUT) is sent to the NCU board as the
transmission data. The transmission data S goes through the amplifier and is sent to the telephone line L1
and L2 via the transformer T1 as high speed signal.
3.6.03 G3 receive Mode
Figure 3.7.5 (For OKIFAX 1050)/Figure 3.8.5 (For OKIFAX 2350/2450) show the G3 receive picture signal
route
In the G3 mode, the high-speed picture signal arriving from the telephone line at L1 and L2 of NCU passes
through the transformer T1 and the amplifier and is input to the MODEM as R signal. After demodulation
by modem, the picture data is sent to CPU. The CPU performs the picture data processing (decode) for
this picture data and stores into the DRAM (for OKIFAX 1050)/P-SRAM (for OKIFAX 2350/2450), Then,
the stored picture data is again written into DRAM/P-SRAM (as a page memory) by the picture processing
control of CPU. When the data for one page has been stored in the DRAM/P-SRAM, the data is read out
from the DRAM/P-SRAM and sent to IOGA. The picture data is converted into a signal data by the printer
control of IOGA and transferred to the LED print head for printing as HDATA.
3.6.04 300bps Send Mode
Figure 3.7.2 (For OKIFAX 1050)/Figure 3.8.2 (For OKIFAX 2350/2450) show 300bps send protocol signal
route
Summary of Contents for OKIFAX 1050
Page 1: ...Chapter 0 Front Cover...
Page 14: ...Figure 1 4 2 OKIFAX 1050 Control Panel Figure 1 4 2 OKIFAX 1050 Control Panel...
Page 15: ...Figure 1 4 3 OKIFAX 2350 Control Panel Figure 1 4 3 OKIFAX 2350 Control Panel...
Page 16: ...Figure 1 4 4 OKIFAX 2450 Control Panel Figure 1 4 4 OKIFAX 2450 Control Panel...
Page 25: ...Figure 1 5 1 Ambient Condition...
Page 53: ...Figure 2 3 1 Unpacking Procedure 2...
Page 54: ...Figure 2 3 2 Unpacking Procedure 3...
Page 59: ......
Page 61: ......
Page 87: ......
Page 89: ......
Page 100: ......
Page 101: ...Users Initial Settings Users Initial Settings One Touch Key Operations...
Page 120: ......
Page 122: ......
Page 125: ...Case 2 Cancelling member s from a group...
Page 126: ......
Page 128: ...2 9 12 02 Procedure 2 9 12 02 Procedure Table 2 9 11 Default Settings of Dial Parameters...
Page 135: ...Fig 2 9 4 Printed Data of Self diagnosis Print Test Example...
Page 138: ...Fig 2 9 5 Typical Transmission Flow Fig 2 9 5 Typical Transmission Flow...
Page 139: ...Fig 2 9 6 Typical Reception Flow Fig 2 9 6 Typical Reception Flow...
Page 159: ...3 5 07 HOOK board Optional handset 3 5 07 HOOK board Optional handset Hook switch circuit...
Page 163: ...Figure 3 5 2 OKIFAX 2350 2450 Block Diagram Figure 3 5 2 OKIFAX 2350 2450 Block Diagram...
Page 167: ...Okifax 1050 300 bps Send Signal Okifax 1050 300 bps Send Signal...
Page 168: ...Okifax 1050 300 bps Send Signal Okifax 1050 300 bps Send Signal...
Page 169: ...Okifax 1050 G3 Send Picture Signal Okifax 1050 G3 Send Picture Signal...
Page 170: ...Okifax 1050 G3 Receive Picture Signal Okifax 1050 G3 Receive Picture Signal...
Page 171: ...Okifax 1050 Report Print Signal Okifax 1050 Report Print Signal...
Page 173: ...Okifax 2350 2450 bps Send Okifax 2350 2450 bps Send...
Page 174: ...Okifax 2350 2450 bps Receive Signal Okifax 2350 2450 bps Receive Signal...
Page 175: ...Okifax 2350 2450 G3 Send Picture Signal Okifax 2350 2450 G3 Send Picture Signal...
Page 176: ...Okifax 2350 2450 G3 Receive Picture Signal Okifax 2350 2450 G3 Receive Picture Signal...
Page 177: ...Okifax 2350 2450 Report Print Signal Okifax 2350 2450 Report Print Signal...
Page 179: ...CN3 28 8 V 0 1 A 0 to 0 1 A 15 to 6 5 V 3 0 VP P 3 6 VP P...
Page 180: ...General functional description General functional description...
Page 186: ...Block Diagram of TEL U option Block Diagram of TEL U option...
Page 187: ...Relationship between NCUU and TEL U Relationship between NCUU and TEL U...
Page 189: ...Expanded Memory Optional OKIFAX 1050 2350 2450...
Page 193: ...Layout of Print Station Components Layout of Print Station Components...
Page 195: ......
Page 198: ......
Page 200: ......
Page 212: ...Figuree 3 21 1 Sensor Location Top View Figure 3 21 2 Detail of Sensor Lever...
Page 218: ......
Page 224: ...2 Reassembly procedure Reverse the disassembly procedures...
Page 226: ...Title of Section...
Page 227: ...Title of Section...
Page 228: ...Title of Section...
Page 241: ...HASH OK 1507 Figure 6 5 1 Self diagnosis Data...
Page 243: ...Note After adjustment of levels check the copy quality by copying test charts or documents...
Page 260: ...90F2 Fuser error 90F3 Recording paper size error 90F4 Cover open...
Page 262: ...7 1 Overall Troubleshooting Flow Chart 7 1 Overall Troubleshooting Flow Chart...
Page 263: ...7 2 No LCD Operation 7 2 No LCD Operation...
Page 264: ...7 3 ALARM LED On 7 3 ALARM LED On...
Page 265: ...7 4 Printing Test Failure 7 4 Printing Test Failure...
Page 266: ...7 5 No Local Copy 7 5 No Local Copy...
Page 270: ...7 8 Auto Reception Failure 7 8 Auto Reception Failure...
Page 274: ...7 11 LED Test 7 11 LED Test...
Page 275: ...7 12 Tone Send Test 7 12 Tone Send Test...
Page 276: ...7 13 High speed Modem Test 7 13 High speed Modem Test...
Page 277: ...7 14 MF Send Test 7 14 MF Send Test...
Page 278: ...7 15 Tone TEL FAX Send Test 7 15 Tone TEL FAX Send Test...
Page 280: ...7 17 Power Supply Unit 7 17 Power Supply Unit...
Page 283: ...7 20 Document Skew 7 20 Document Skew...
Page 284: ...7 21 Document Jam 7 21 Document Jam...
Page 287: ...Troubleshooting flow chart 1 Troubleshooting flow chart 1 The cover copy stacker is open...
Page 290: ...Troubleshooting flow chart 4 Troubleshooting flow chart 4 Fan motor rotation error...
Page 296: ...Troubleshooting flow chart 8 Troubleshooting flow chart 8...
Page 297: ...Troubleshooting flow chart 9 Troubleshooting flow chart 9...
Page 298: ...Troubleshooting flow chart 10 Troubleshooting flow chart 10...
Page 299: ...Troubleshooting flow chart 11 Troubleshooting flow chart 11...
Page 301: ...Troubleshooting flow chart 13 Troubleshooting flow chart 13...
Page 303: ......
Page 304: ...Chapter 8 ASSEMBLY OKIFAX 1050 OKIFAX 1050...
Page 305: ...ASSEMBLY OKIFAX 2350 2450 OKIFAX 2350 2450...
Page 306: ...SECTION 1 CABINET ASSEMBLY OKIFAX 1050 OKIFAX 1050...
Page 308: ...SECTION 2 CONTROL ASSEMBLY OKIFAX 1050 OKIFAX 1050...
Page 309: ...SECTION 2 CONTROL ASSEMBLY OKIFAX 2350 OKIFAX 2350...
Page 311: ...SECTION 3 PRINTER ASSEMBLY OKIFAX 2350 2450 OKIFAX 2350 2450...
Page 315: ...SECTION 4 BASE ASSEMBLY OKIFAX 1050 OKIFAX 1050...
Page 320: ...SECTION 7 CABLES OKIFAX 1050 OKIFAX 1050...
Page 333: ......
Page 334: ...9 5 Connection Diagram 9 5 Connection Diagram 9 5 1 Interconnection Diagram...