Epson LX-300

Operating Principles
LXXX) Service Mimual
2.2 POWER SUPPLY OPERATION
The printer can be powered by either of two power supply boards: the C130 F’SB (120V) board
(
( “+
assembly or the C130 PSE (230V) power supply.
The function of these two boards is the same,
except for a difference in primary circuitry.
The power
supply board outputs the DC current
necessary to drive the printer control circuits and drive mechanism.
Table 2-6 shows the input
voltages and fuse ratings for these boards.
Table 2-6. Power Supply Board
Board
Input Voltage
Fuse F1 Rating
C130 PSB
100.5-132 VAC
2.5A 1125V, 250V
C130 PSE
198-284
VAC
1.25A 1250V
2.2.1 Power Supply Overview
The power supply board has two power outputs for use in the various control arcuits and drive
mechanisms. Table 2-7 lists the circuitry and the units that are driven by the two DC output supply
voltages.
Table 2-7. Power Supply Output Voltages and Applications
‘I%$:i’ul’
Applications
CR motor drivers
PF motor drivers
+35 v (VP)
Printhead drivers
I CS rnotordrivers
I Main board assetivkxic arcuitw
Various sensors
+9 V (VL)
Control
panel LED
PF motor/
CS motor hold
,,
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2-10 Rev.A