A3.3 Power Supply Unit; A3.3.1 1Vp (For 120 V)/2Vp (For 230 V) Circuit Diagram (1/2) - Oki OKIFAX 5400 Maintenance Manual

A3.3 Power Supply Unit
A3.3.1 1VP (for 120 V)/2VP (for 230 V) Circuit Diagram (1/2)
IMPORTANT:
Oki Data Corporation recommends that maintenance of the Power supply unit (1VP/2VP board) be
performed by replacement of a unit, not by replacement of components.
Therefore,
1) circuit descriptions in this section are for reference.
2) orders for components of the power supply unit cannot always be accepted.
Functions of unit:
1VP/2VP circuit generates the following direct currents (DC) based on the alternating current,
AC 120 V +6%, -15%
AC 230 V +15%, -14%
1. Low-voltage power supply circuit
This circuit generates the following voltages.
Output Voltage
+5 V
+8 V
-8 V
+30 V
2. Input ratings
• Voltage
• Frequency :
40838301TH Rev.1
Logic circuit supply voltage (IC, LSI), and high-voltage source voltage, etc.
CIS (contact image sensor)
CIS (contact image sensor)
Send motor, drum motor, resist motor, fan drive, flash memory, CIS, and second
tray voltage
: AC 120 V +6%, -15% (AC 102 V to 127 V)
AC 230 V +15%, -14% (AC 198 V to 264 V)
50 Hz/60 Hz +/-2%
Output Voltage
A3 - 25
PWU