Power Supply Board; Low Voltage Power Supply Circuit; High Voltage Power Supply Circuit; Photosensor - OKIDATA OL600e Service Manual

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

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
CH
DB
SB
TR
CB

Photosensor

The photosensor mounted on this power supply board monitors the paper running state
during printing.
Operation Description
+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
Voltage
-1.35 KV
-300 V/+300 V
-450 V/ 0 V
+500 V to +4 KV/-750 V
+400 V
Use
Applied To
Charging Roller
Developing Roller
Toner Supply Roller
Transfer Roller
Cleaning Roller
2 - 10
Service Manual, P/N 59271602
Remarks
Variable
OL600e/610e/610e-PS/610e-S