41309401TH Rev.4
310 /
Data/Address Bus
M D-motor
Printer control
OST-EX
Buffer 640 bytes
Decoding
(RLE,TIFF,ACC32)
200-300 converter
smoothing
Various Sensor
2/4
1/4
LED head
300 dpi
Data/Address Bus
High-voltage
Controller
4/4
High-voltage
Power Supply
Data/Address Bus
Peripheral control
1284 control
CS generation
I/O port
DMA 2ch
3/4
Bi-Centro
I/F
OPE unit
Speaker
+5V
IC1
X1
20 MHz
CLK
20 MHz
Initial Reset Circuit
POWRDY
(CPU: SH7034)
XTAL
EXTAL
Address Bus
Data/Address bus
CLK
Clutch
Figure A.6 Related Signals of IOGA4
3.
46F Circuit Diagram (OKIFAX4550)
3.1
46F Circuit Diagram (1/13)
1.
Block diagram
46F-PCB circuit diagram (1/13) shown the consists of an input/output gate array IC2 (IOGA4),
crystal oscillator circuit and reset signal generator.
Figure A.6 shown the block diagram of IC2 (IOGA4) and the peripheral circuits.
2.
Function
1)
IOGA4 is newly developed LSI for scanning, printing control and provided with a built-in
CPU.
- IOGA4 contains the following functions:
• Scanned data DMA control
• Strobe signals control for LED head
• Smoothing control for printing data
• Interface of the peripheral LSI
- CPU
CPU controls the following functions in addition to the basic processor.
• DMA (Direct Memory Access) control
• Interrupt procedure control
• A/D converter
• Bus state control
• Programmable pattern control
• 16 bit integrated timer pulse unit (ITU)
• Timing pattern control (TPC)
• Serial communication interface (SCT)
2)
Crystal oscillator circuit
X1 is 20MHz crystal oscillator. The output wave is fed to the IOGA4 (CPU) through pin 14
and 15. CLK (20MHz) signal output from pin 94 is used as the system clock.
Summary of Contents for OKIFAX4550
Page 156: ...41309401TH Rev 4 156 Figure 4 2 Appearance of the OKIFAX4550 OKIOFFICE87...
Page 428: ...41309401TH Rev 4 428 SECTION 1 CABINET ASSEMBLY OKIFAX4550 OKIOFFICE87...
Page 431: ...41309401TH Rev 4 431 SECTION 2 UNIT PRINTER...
Page 433: ...41309401TH Rev 4 433 SECTION 3 UNIT 051 OPE PANEL...
Page 435: ...41309401TH Rev 4 435 SECTION 4 OPEPANEL OPERATION PANEL ASSEMBLY...
Page 437: ...41309401TH Rev 4 437 SECTION 5 FRAME ASSEMBLY SCANNER L...
Page 439: ...41309401TH Rev 4 439 SECTION 6 PLATE ASSEMBLY SCANNER B...
Page 441: ...41309401TH Rev 4 441 SECTION 7 PLATE ASSEMBLY SCANNER R...
Page 443: ...41309401TH Rev 4 443 SECTION 8 FRAME ASSEMBLY SCANNER U...
Page 445: ...41309401TH Rev 4 445 SECTION 9 COVER ASSEMBLY TOP...
Page 447: ...41309401TH Rev 4 447 SECTION 10 PLATE ASSEMBLY BASE...
Page 449: ...41309401TH Rev 4 449 SECTION 11 PRINTER BASE FRAME UNIT Heat assy...
Page 452: ...41309401TH Rev 4 452 SECTION 12 PRINTER HEAT ASSY...
Page 454: ...41309401TH Rev 4 454 SECTION 13 CABLES...
Page 457: ...41309401TH Rev 4 457 46F PCB Assy 1 9 41196601...
Page 466: ...41309401TH Rev 4 466 R46 PCB Assy 1 10 41033201...
Page 476: ...41309401TH Rev 4 476 04W PCB Assy 1 3 40071401...
Page 479: ...41309401TH Rev 4 479 EN9 PCB Assy 1 6 41144301...
Page 485: ...41309401TH Rev 4 485 INU PCB Assy 41144501 US 1 4 41144502 INT 1 5...
Page 493: ...41309401TH Rev 4 493 MPW1546 120V PCB Assy 1 5 SIPS1303...
Page 498: ...41309401TH Rev 4 498 MPW1446 230V PCB Assy 1 6 SIPS1302...
Page 504: ...41309401TH Rev 4 504 P2H PCB Assy 1 4 40599101...
Page 508: ...41309401TH Rev 4 508 P6L PCB Assy 1 3 40386701...
Page 511: ...41309401TH Rev 4 511 G4N PCB Assy 1 5 41033701...
Page 585: ...41309401TH Rev 4 585 Figure H 7 1 2 RTC Time Read Figure H 7 2 2 RTC Time Set...
Page 587: ...41309401TH Rev 4 587 Figure H 9 Figure H 10 1 3...
Page 588: ...41309401TH Rev 4 588 Figure H 10 2 3 Figure H 10 3 3...
Page 589: ...41309401TH Rev 4 589 Figure H 11 1 3 Figure H 11 2 3...
Page 590: ...41309401TH Rev 4 590 Figure H 12 Figure H 11 3 3...
Page 591: ...41309401TH Rev 4 591 Figure H 13 1 2 Figure H 13 2 2...
Page 592: ...41309401TH Rev 3 592 592 Figure H 14 1 2 Figure H 14 2 2...
