Oki OKIOFFICE 84 Service Manual page 406
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Also See for OKIOFFICE 84:
- User handbook manual (99 pages) ,
- User manual (96 pages) ,
- Quick reference (14 pages)
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Figure A3.1.16 Fuser Unit Temperature Control
3) High-voltage and medium-voltage control
High voltages are activated by IOGA and generated by the high-voltage circuit inside the power supply unit. The CH
(charge) voltage of about -1.35kV is used for the charge roller.
The TR1/TR2 (transfer) voltage of about +3.5kV/-0.75kV is used for the transfer roller. Medium voltages are
activated by IOGA 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
+300V/-300V 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
CHON
DBON1
DBON2
TRON1
TRON2
Description
"1": CH is output.
"1": + ive polarity voltage of DB/SB is output.
"1": - ive polarity voltage of DB/SB is output.
"1": + ive polarity voltage of TR is output.
"1": - ive polarity voltage of TR is output.
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