Toshiba 3511, 4511 manual Output Control Circuits of High-Voltage Transformer, IC7

11

11.3 Output Control Circuits of High-Voltage Transformer

•Outputs adjustment value of the main charger, transfer charger, and developer biases in the NVRAM to the main processor.

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•Outputs control voltage data from the main processor to the D/A converter.

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•Analog conversion by the D/A converter.

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•Outputs control voltage Vc to the main charger grid bias, 1st transfer roller bias, 2nd transfer roller bias, color developer bias and black developer bias transformer.

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•The main charger bias, 1st transfer roller bias, 2nd transfer roller bias, color developer bias and black developer bias transformers generate output current or voltage proportional to the control voltage Vc with the output ON signal.

*Adjustment of the control voltage Vc (change of adjustment data) is performed in the Adjustment Mode (05).

*Output value of the cleaning blade bias is fixed when the transformer board is shipped from the factory.

MAIN

CPU

IC34

Gate array

IC29

NVRAM

D/A

converter

IC8

Transistor

array

IC7

Main charger grid 1st transfer

2nd transfer Black developer Color developer

Main charger ON 1st transfer 2nd transfer

Black developer (DC) ON Black developer (AC) ON Color developer (DC) ON Color developer (AC) ON Cleaning blade ON

Fig. 11-301

e-STUDIO3511/4511 DRUM RELATED SECTION 11 - 4 November 2003 © TOSHIBA TEC