Oki OKIPAGE 14e, Руководство по обслуживанию

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41605601TH Rev.2
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2.2 Power Supply/Sensor Board
The power supply/sensor board consists of an AC filter circuit, a low voltage power supply circuit, a
high voltage power supply circuit, heater drive circuit, and photosensors.
(1) Low Voltage Power Supply Circuit
This circuit generates the following voltages.
(2) High Voltage Power Supply Circuit
This circuit generates the following voltages required for electrophotographic process from +5
V, according to the control sequence from the main 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 Use
+5 V
+30 V
+12 V
Logic circuit supply voltage and LED head supply voltage
Motor and fan drive voltage
Source voltage for high-voltage supply
(3) Photosensor
The photosensor mounted on this power supply/sensor board monitors the status of paper being
fed through the printer during printing.
Output Voltage Use Remarks
CH
Sub CH
DB
SB
TR
CB
Voltage applied to charge roller
Voltage applied to sub-charge roller
Voltage applied to developing roller
Voltage applied to toner supply roller
Voltage applied to transfer roller
Voltage applied to cleaning roller
Variable
–1.3 KV
–1.5 KV to –1.8 KV
–265 V/+300 V
–500 V/ 0 V
+500 V to +4.5 KV/–1100 V
+400 V/–1350 V