Principles Of Operation; Power Supply Circuit; Power Supply Circuit Block Diagram - Epson L-1000 Technical Manual

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2.2 PRINCIPLES OF OPERATION

This section describes the operation of each component.

2.2.1 Power Supply Circuit

The paragraphs below provide details of power supply circuit operations.

2.2.1.1 Power Supply Circuit Block Diagram

120/220/240 VAC are applied to the step-down transformer via the filter circuit to create 26 VAC and 12 VAC,
which are then input to the power supply circuit on the main board. The 26 VAC are converted into about 36
VDC via the full-wave rectifier and smoothing circuit, and input to the regulator circuits for + 24 VDC and + 5
VDC to be supplied to the control circuit. The + 24 VDC and + 5 VDC are also supplied to the Vx voltage circuit
and, while generating the Vx voltage, transferred to the control circuit.
The 12 VAC supplies a nonstabilized + 12 V to the control circuit via the positive terminal of the half-wave rec-
tifier and smoothing circuit.
LQ-500/ L-1000
Figure 2-9. Power Supply Circuit Block Diagram
PRINCIPLES OF OPERATION
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