OKIDATA 610e, Руководство по обслуживанию

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Operation Description 2 - 10 OL600e/610e/610e-PS/610e-S
Service Manual, P/N 59271602
2.3 Power Supply Board
The power supply board consists of an AC filter circuit, a low voltage power supply circuit, a
high voltage power supply circuit, heater drive circuit, and photosensors.
Low Voltage Power Supply Circuit
This circuit generates the following voltages.
Output voltage Use
+5 V Logic circuit supply voltage
+30 V Motor and fan drive voltage and source voltage for high-voltage supply
+8 V Analog supply voltage
–8 V PS board and analog circuit supply voltage
High Voltage Power Supply Circuit
This circuit generates following voltages required for electrophotographic process from
+5 V, according to the control sequence from the control board. When cover open state
is detected, +5 V supply is interrupted automatically to stop the supply of all high-voltage
outputs.
Output Voltage Applied To Remarks
CH -1.35 KV Charging Roller
DB -300 V/+300 V Developing Roller
SB -450 V/ 0 V Toner Supply Roller
TR +500 V to +4 KV/-750 V Transfer Roller Variable
CB +400 V Cleaning Roller
Photosensor
The photosensor mounted on this power supply board monitors the paper running state
during printing.