High-Voltage Transformer Output Control Circuit - Toshiba e-STUDIO281c Service Manual

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.
Engine
CPU
Gate array
#2
NVRAM
June 2005 © TOSHIBA TEC
D/A
TC2VR
converter
TC2ON
Fig.14-2
14 - 7
2nd transfer roller
High-voltage
transformer
+1000V,
-1000V
e-STUDIO281c/351c/451c TRANSFER UNIT
14