
The ACON control signal on the secondary side is transmitted to the primary side via PC4 to turn triac TRA1 for AC
voltage supply to the heater.
3) High-voltage and medium-voltage control
High voltages are activated by IOGA4 and generated by the high-voltage circuit inside the power supply unit. The CH
(charge) voltage of about -1.30kV is used for the charge roller. The TR1/TR2 (transfer) voltage of about
+3.9kV/-0.75kV is used for the transfer roller.
Medium voltages are activated by IOGA4 and generated by the medium-voltage circuit inside the power supply unit.
The SB1/SB2 (toner supply) voltage of about +0V/-450V is used for the toner supply roller. The DB1/DB2
(developing) voltage of about +265V/-265V is used for the developing roller. The CB (cleaning) voltage of about
+400V/-1.35kV is used for the cleaning roller.
Figure A3.1.15 shows high/medium voltages control.
* Signals used to control the high/medium-voltages are listed below.
Signal Name
Description
CHON
"1": CH is output. (-1.30kV)
DBON1
"1": + ive polarity voltage of DB/SB is output. (+265V)
DBON2
"1": - ive polarity voltage of DB/SB is output. (-265V)
TRON1
"1": + ive polarity voltage of TR is output. (+3.9kV)
TRON2
"1": - ive polarity voltage of TR is output. (-3.9kV)
CB1ON
"1": - ive polarity voltage of CB is output. (+400V)
CB2ON
"1": - ive polarity voltage of CB is output. (-1.35kv)
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner
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Summary of Contents for OKIOFFICE 84
Page 52: ......
Page 53: ... Example 2 of 3 Example 3 of 3 ...
Page 55: ...Page 34 Service Guide OKIOFFICE 84 Chapter 1 General Information Configuration Report User ...
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Page 64: ...Note ...
Page 67: ...Figure 2 3 Unpacking Procedure 2 ...
Page 80: ...Page 46 Service Guide OKIOFFICE 84 Chapter 2 Installation Key Operation Flowchart ...
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Page 101: ...Page 56 Service Guide OKIOFFICE 84 Chapter 2 Installation TEL FAX Mode Flow Chart ...
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Page 150: ...Page 83 Service Guide OKIOFFICE 84 Chapter 2 Installation Table 2 9 5 1 3 User s Functions ...
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Page 153: ...Page 84 Service Guide OKIOFFICE 84 Chapter 2 Installation Table 2 9 5 2 3 User s Functions ...
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Page 156: ...Page 85 Service Guide OKIOFFICE 84 Chapter 2 Installation Table 2 9 5 3 3 User s Functions ...
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Page 168: ...Page 91 Service Guide OKIOFFICE 84 Chapter 2 Installation 2 9 7 Dual Access Operation ...
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Page 172: ...Note Use the UNIQUE key to input special symbols ...
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Page 182: ...Page 98 Service Guide OKIOFFICE 84 Chapter 2 Installation Self Diagnosis Print Test Example ...
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Page 254: ...Note DRUM T will be used to know the total in use life of the machine ...
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Page 288: ...Page 164 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 2 No LCD Operation ...
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Page 294: ...Page 167 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 5 No Local Copy ...
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Page 297: ...Page 168 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 6 Auto Dial Failure ...
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Page 308: ...Page 173 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 11 LED Test ...
Page 311: ...Page 175 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 13 High Speed Modem Test ...
Page 313: ...Page 176 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 14 MF Send Test ...
Page 315: ...Page 177 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 7 15 Tone TEL FAX Send Test ...
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Page 339: ...Page 192 Service Guide OKIOFFICE 84 Chapter 7 Troubleshooting 5 Paper Jams ...
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Page 453: ...Page 269 Service Guide OKIOFFICE 84 Chapter C Illustrated Parts List Illustrated Parts List ...
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Page 479: ...Page 283 Service Guide OKIOFFICE 84 Chapter C Illustrated Parts List Section 12 Cables ...
Page 480: ...Rev No OKIDATA P N Description Q ty Remarks 1 40635401 Connection Cord Wire AC 1 ...