Toshiba e-studio281c - 3.11 Adjustment of the Developer Unit; 3.11.1 Doctor-to-sleeve gap (black developer unit)

14
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TRANSFER UNIT
14 - 7
14.6 High-Voltage Transformer Output Control Circuit
High-voltage power supply outputs the voltage of positive/negative polarity.
When the voltage of positive polarity is supplied to the 2nd transfer roller, the toner will be supplied from
the intermediary belt to the paper.
When the voltage of negative polarity is supplied to the 2nd transfer roller, the toner on the 2nd transfer
roller is transferred to the transfer belt reversely. The toner on the transfer belt is eliminated by the
cleaning unit and thus cleaning of the 2nd transfer roller is performed.
Fig. 14-2
Engine
CPU
NVRAM
D/A
converter
High-voltage
transformer
Gate array
#2
TC2ON
TC2VR
+1000V,
-1000V
2nd transfer roller