11.3  Output Control Circuits of High-Voltage Transformer

11.3.1  Overview

•Generate the output control voltage Vc of the main charger, transfer/separation charger, transfer guide bias and developer bias.

•Convert Vc The current is output linearly.

11.3.2  Description of operations

 

 

 

 

 

 

 

HVT board

 

 

 

 

 

 

 

 

Main/

 

 

Adjustment

 

Digital

 

 

 

transfer/

 

 

 

 

 

Vc

separation/

 

 

value

ASIC

data

D/A

Analog

 

NVRAM

chargers,

Output

 

GA

 

converter

 

 

developer

 

 

 

 

 

 

 

 

 

 

 

 

 

bias and

 

IC32

 

IC38

 

IC2

 

 

transfer

 

 

 

 

 

guide bias

 

 

 

 

 

 

 

 

 

LGC board

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 11-301

 

 

 

 

•Outputs the adjustment value of the main, transfer and separation chargers, developer bias and transfer guide bias in the NVRAM to the ASIC GA.

↓

•Outputs the control voltage data from the ASIC GA to the D/A converter.

↓

•Converts to the analog data by the D/A converter.

↓

•Outputs the control voltage Vc to the main, transfer and separation chargers, developer bias and transfer guide bias transformer.

↓

•The main, transfer and separation chargers, developer bias and transfer guide bias transformer gen- erate output current or voltage which is proportional to the control voltage Vc.

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

*The output value of the transfer guide bias is fixed when the high-voltage transformer is shipped from the factory.

11

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Toshiba 353, 452, 453, 350 Output Control Circuits of High-Voltage Transformer, Overview, Description of operations
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350, 353, 453, 452 specifications

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