Panasonic DX-600 Service Manual page 227

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High Voltage Drive Circuit (Charging, Development and Transfer)

High Voltage is provided through a DC to DC converter, which changes the +24 VDC supply voltage to -

650 VDC, and output approximately 0.64 KVAC (Steady current: 200 µA) for the Charging Block. The

Developer Circuit converts the +24 VDC to between -300 VDC for the development bias, and outputs

1,500 VAC (p-p) at a frequency of 1.650 kHz to charge the toner. The Transfer Circuit changes the +24

VDC supply voltage to approximately +280 VDC (MAX) (steady current:3 µA/-1500 VDC steady voltage).

High Voltage Drive Circuit

Discharge Plate

Bias Transfer Roller

Bias Charge Roller

Development Roller

Troubleshooting