Oki B 4100 Maintenance Manual page 429

A3.5 Power Supply Unit for OKIOFFICE 44/OKIFAX 4100
A3.5.1 048 POW (120V/230V) Circuit Diagram
IMPORTANT:
Oki Data Corporation recommends that maintenance of the Power supply unit (048 POW 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:
048 POW 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 Logic circuit supply voltage (IC, LSI), and high-voltage source voltage
-8 V CIS (contact image sensor)
+24 V Send motor, drum motor, fan drive, flash memory, CIS, and clutch
2. Input ratings
• Voltage
• Frequency : 50 Hz/60 Hz +/-2%
40055101TH Rev.4
: AC 120 V+6%, -15% (AC 102 V to 127 V)
AC 230 V+15%, -14% (AC 198 V to 264 V)
Output Voltage
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