Epson RS-353, Service Manual

Page: 34 / 130

2.2 POWER SUPPLY UNIT
The Power Supply unit includes DC regulator, exhaust fan and interlock switch with
lump cover.
The Power Supply unit generates the voltage for the control circuit
and for the light source lamp
from AC input.
Although the outline of its function is shown below, please never disassemble the
power supply unit at the field maintenance service.
Power supply unit,
Figure 5
(1) Function block
INTERLOCK SW
POWER SW
i
i
AC IN
i
SAFTY MAIN
SWITCH
BOARD
(overheat CN 505
protection)
CONNECT TO MAIN BOARD AND DRIVER BOARD
i
i
Figure 6

The Interlock switch is built for the safety purpose.
The Interlock switch will shut the supply of AC power
by opening the lamp cover at the bottom of main chassis.
The input signal from the safety switch is prepared for the protection of over heat. It stops the output to
the power for the Light source lamp In case of detecting over heat of Lamp Housing area.
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