41309401TH Rev.4
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4.
R46 Circuit Diagram (OKIOFFICE87)
4.1
R46 Circuit Diagram (1/15, 2/15, 3/15)
1.
Block diagram
R46-PCB circuit diagram (1/15, 2/15, 3/15) shown the consists of an input/output gate array IC2
(IOGA6), crystal oscillator circuit and reset signal generator.
Figure A.19 shown the block diagram of IC2 (IOGA6) and the peripheral circuits.
2.
Function
1)
IOGA6 is newly developed LSI for scanning, printing control and provided with a built-in
CPU.
- IOGA6 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 CPU1 through pin 73 and 74.
CLK (20MHz) signal output from pin 71 is used as the system clock.
Data/Address Bus
M D-motor
Printer control
OST-EX
Buffer 640 bytes
Decoding
(RLE,TIFF,ACC32)
200-300 converter
smoothing
Various Sensor
IOGA6 1/3
IOGA6 2/3
IOGA6 3/3
LED head
300 dpi
Data/Address Bus
High-voltage
Controller
High-voltage
Power Supply
Data/Address Bus
Peripheral control
1284 control
CS generation
I/O port
DMA 2ch
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.19 Related Signals of IOGA6
Содержание OKIFAX4550
Страница 1: ...41309401TH Rev 4 1 592 OKIFAX4550 OKIOFFICE87 Maintenance Manual 2001 05 08 Rev 4 Oki Data Corporation...
Страница 156: ...41309401TH Rev 4 156 Figure 4 2 Appearance of the OKIFAX4550 OKIOFFICE87...
Страница 428: ...41309401TH Rev 4 428 SECTION 1 CABINET ASSEMBLY OKIFAX4550 OKIOFFICE87...
Страница 431: ...41309401TH Rev 4 431 SECTION 2 UNIT PRINTER...
Страница 433: ...41309401TH Rev 4 433 SECTION 3 UNIT 051 OPE PANEL...
Страница 435: ...41309401TH Rev 4 435 SECTION 4 OPEPANEL OPERATION PANEL ASSEMBLY...
Страница 437: ...41309401TH Rev 4 437 SECTION 5 FRAME ASSEMBLY SCANNER L...
Страница 439: ...41309401TH Rev 4 439 SECTION 6 PLATE ASSEMBLY SCANNER B...
Страница 441: ...41309401TH Rev 4 441 SECTION 7 PLATE ASSEMBLY SCANNER R...
Страница 443: ...41309401TH Rev 4 443 SECTION 8 FRAME ASSEMBLY SCANNER U...
Страница 445: ...41309401TH Rev 4 445 SECTION 9 COVER ASSEMBLY TOP...
Страница 447: ...41309401TH Rev 4 447 SECTION 10 PLATE ASSEMBLY BASE...
Страница 449: ...41309401TH Rev 4 449 SECTION 11 PRINTER BASE FRAME UNIT Heat assy...
Страница 452: ...41309401TH Rev 4 452 SECTION 12 PRINTER HEAT ASSY...
Страница 454: ...41309401TH Rev 4 454 SECTION 13 CABLES...
Страница 457: ...41309401TH Rev 4 457 46F PCB Assy 1 9 41196601...
Страница 466: ...41309401TH Rev 4 466 R46 PCB Assy 1 10 41033201...
Страница 475: ...41309401TH Rev 4 475 REF NO SYMBOL TYPE NAME PART NO Q TY REMARKS 148 Screw PSW3 4C 2 R46 PCB Assy 10 10 41033201...
Страница 476: ...41309401TH Rev 4 476 04W PCB Assy 1 3 40071401...
Страница 479: ...41309401TH Rev 4 479 EN9 PCB Assy 1 6 41144301...
Страница 485: ...41309401TH Rev 4 485 INU PCB Assy 41144501 US 1 4 41144502 INT 1 5...
Страница 493: ...41309401TH Rev 4 493 MPW1546 120V PCB Assy 1 5 SIPS1303...
Страница 498: ...41309401TH Rev 4 498 MPW1446 230V PCB Assy 1 6 SIPS1302...
Страница 504: ...41309401TH Rev 4 504 P2H PCB Assy 1 4 40599101...
Страница 508: ...41309401TH Rev 4 508 P6L PCB Assy 1 3 40386701...
Страница 511: ...41309401TH Rev 4 511 G4N PCB Assy 1 5 41033701...
Страница 585: ...41309401TH Rev 4 585 Figure H 7 1 2 RTC Time Read Figure H 7 2 2 RTC Time Set...
Страница 587: ...41309401TH Rev 4 587 Figure H 9 Figure H 10 1 3...
Страница 588: ...41309401TH Rev 4 588 Figure H 10 2 3 Figure H 10 3 3...
Страница 589: ...41309401TH Rev 4 589 Figure H 11 1 3 Figure H 11 2 3...
Страница 590: ...41309401TH Rev 4 590 Figure H 12 Figure H 11 3 3...
Страница 591: ...41309401TH Rev 4 591 Figure H 13 1 2 Figure H 13 2 2...
Страница 592: ...41309401TH Rev 3 592 592 Figure H 14 1 2 Figure H 14 2 2...