OKIDATA OF1050, Service Manual

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Page: 119
Service Guide OF1050/2350/2450
Chapter 3 Board Description/Printer Operation
3.9 Power Supply Unit
3.9.01 FXVE (for 120 V)/FXVH (for 230 V) Circuit Diagram (1/2)
IMPORTANT: Okidata recommends that maintenance of the Power supply unit (FXVE/FXVH board) be
performed by replacement of a unit, not by replacement of components.
Therefore,
circuit descriptions in this section are for reference.
orders for components of the power supply unit cannot be accepted.
Functions of unit:
FXVE/FXVH 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 Output Voltage
+5 V Logic circuit supply voltage (IC, LSI), and high-voltage source voltage
+8 V Charging circuit for OKIFAX 2450 Image Data battery backup
+5 V CIS (contact image sensor)
+5 V Send motor, drum motor, resist motor, fan drive, flash memory, CIS, and
second tray voltage
2. Input ratings
Voltage: AC 120 V+6%, -15% (AC 102 V to 127 V)
AC 230 V+15%, -14% (AC 198 V to 264 V)
Frequency: 50 Hz/60 Hz +/-2%
3. Output ratings
Transformer type A (OKIFAX 1050)
Pin No. Rated
Voltage Rated
Current Current
Range Voltage
Range Output
Ripple Output
Noise