E17
40838301TH Rev.1
A3 - 19
3)
High-voltage and medium-voltage control
High voltages are activated by CPU and generated by the high-voltage circuit inside
the power supply unit. The CH (charge) voltage of about -1.35 kV is used for the charge
roller. The TR1/TR2 (transfer) voltage of about +3.5 kV/-0.75 kV is used for the transfer
roller.
Medium voltages are activated by CPU and generated by the medium-voltage circuit
inside the power supply unit. The SB1/SB2 (toner supply) voltage of about +0 V/-450
V is used for the toner supply roller. The DB1/DB2 (developping) voltage of about +300
V/-300 V is used for the developing roller. The CB (cleaning) voltage of about +400V
is used for the cleaning roller.
Figure A3.1.17 shows high/medium voltages control.
* Signals used to control the high/medium-voltages are listed below.
Signal Name
CHPWM
P.W.M : CH is output.
Description
DB1ENB
"1": + ive polarity voltage of DB1/SB1 is output.
DB2ENB
"1": - ive polarity voltage of DB2/SB2/CB is output.
TR1PWM
P.W.M : TR1 is output.
TR2PWM
P.W.M : TR2 is output.
DBPWM
P.W.M : DB/SB/CB is output.
CPU
DBON1
DBON2
DBPWM
TR1PWM
CHPWM
TR2PWM
E17
1VP/2VP (Power supply unit)
High-voltage
generation
circuit
Medium-
voltage
generation
circuit
Contact assy.
Cleaning roller
Charge roller
EP drum
Transfer roller
Developing roller
Toner supply roller
CH
TR1/TR2
CB
DB1/DB2
SB1/SB2
25
29
30
31
33
35
Figure A3.1.17 High/Medium Voltage Control
Содержание OKIFAX 5400
Страница 7: ...40838301TH Rev 1 CHAPTER 1 GENERAL INFORMATION...
Страница 46: ...40838301TH Rev 1 CHAPTER 2 INSTALLATION PROCEDURE...
Страница 130: ...40838301TH Rev 1 CHAPTER 3 BRIEF TECHNICAL DESCRIPTION...
Страница 138: ...40838301TH Rev 1 CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY...
Страница 157: ...40838301TH Rev 1 CHAPTER 5 ADJUSTMENTS...
Страница 162: ...40838301TH Rev 1 CHAPTER 6 CLEANING AND MAINTENANCE...
Страница 189: ...40838301TH Rev 1 CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5400...
Страница 240: ...40838301TH Rev 1 CHAPTER 8 DIPSWITCHS SETTING TABLES...
Страница 353: ...40838301TH Rev 1 Appendix B Descriptions of Print Operation First Edition August 1999 Oki Data Corporation...
Страница 375: ...40838301TH Rev 1 Appendix C Circuit Diagram and Parts List OK IFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 380: ...40838301TH Rev 1 D 2 SECTION 1 CABINET ASSEMBLY 5...
Страница 382: ...40838301TH Rev 1 D 4 SECTION 2 CONTROL PANEL ASSEMBLY...
Страница 384: ...40838301TH Rev 1 D 6 SECTION 3 PRINTER ASSEMBLY 51...
Страница 387: ...40838301TH Rev 1 D 9 SECTION 4 BASE ASSEMBLY 30 37 36 39 40 5...
Страница 390: ...40838301TH Rev 1 D 12 SECTION 5 SCAN UNIT...
Страница 392: ...40838301TH Rev 1 D 14 SECTION 6 PAPER GUIDE U ASSEMBLY...
Страница 394: ...40838301TH Rev 1 D 16 SECTION 7 CABLES 10 11 19 12 20 21...
Страница 396: ...40838301TH Rev 1 D 18 SECTION 8 OPTION TELEPHONE US...
Страница 399: ...40838301TH Rev 1 D 21 SECTION 8 OPTION TELEPHONE UK ITA NOR DEN BEL...
Страница 402: ...40838301TH Rev 1 D 24 SECTION 8 OPTION TELEPHONE HOL GER FRA SWITZ AUT INT L...
Страница 405: ...40838301TH Rev 1 Appendix E Board Layout OKIFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 424: ...40838301TH Rev 1 F 15 5 2 PCB Layout TQSB 2PCB PU FG CONTROLLER MOTOR DRIVER SEN2 MOTOR OSC SEN1...
Страница 425: ...40838301TH Rev 1 F 16 Figure 6 1 6 PARTS LIST SECTION1 CABINET CASSETTE ASSEMBLY F 16 1 4 P 6 5 8 7 3 O 1 2...
Страница 426: ...40838301TH Rev 1 F 17 SECTION2 MECHANICAL ASSEMBLY Figure 6 2 F 16 2 9 A 0 C M L D N E F G H U V T S Q R J I B K A A B B...
Страница 428: ...40838301TH Rev 1 Appendix G RMCS SYSTEM MANUAL For Model 20 First Edition August 1999 Oki Data Corporation...