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3.
Power Supply Circuit
A ringing choke converter type circuit is used with a dropper type circuit in the power supply unit, fulfilling the input and
output conditions described in the chart below.
Voltage Range
Max. Current Output
Service
Circuit Type
Input
100 to 120VAC
2.5 A
220 to 240VAC
1.3 A
5 VDC
±
5%
0.3 A
Dropper
40 VDC
±
5%
3.3A
Ringing choke
converter.
For logic circuit
drive, for motor
holding.
For print head
drive, for motor
drive.
Output
Input
100VAC
110VAC
220VAC
230VAC
240VAC
Noise filter
circuit
In rush current
protection
circuit
Rectifier
circuit
Voltage auto
select circuit
Switching
section
(Transistor Q1)
Ringing
choke
converter
Dropper
circuit
Voltage
reference
Control
circuit
Transformer T1
PC1
Photo-Coupler
Output
40V DC
Output
5V DC
Fig. 2-3 Power Supply unit block diagram
Содержание LC-8521
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Страница 101: ... 97 Blank Page ...
Страница 102: ... 98 4 Wiring Scheme of Printer ...
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Страница 104: ... 100 5 Electrical Parts 5 1 Main Logic Board 5 1 1 Circuit Diagram ...
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Страница 108: ... 104 5 1 2 Component Layout ...
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Страница 116: ... 112 5 4 Power Supply Unit 5 4 1 Circuit Diagram ...
Страница 117: ... 113 5 4 2 Component Layout ...
Страница 120: ... 116 6 Serial Parallel Converter Board Option 6 1 Wiring Scheme ...
Страница 122: ... 118 6 3 CPU Board 6 3 1 Circuit diagram ...