Epson RS-353, Service Manual

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* The RS-353 is provided with a timer circuit that controls the operating time of the light
source valve. It’s operation is described below.
Light source state
Lamp monitor state
When the operating time of the light The lamp monitor continues to flash red
source valve exceeds 700 hours. and orange for 5 minutes after it is turned
on. (The light source stays on)
When the operating time of the light The lamp monitor flashes in green and
source valve exceeds 1000 hours.
orange. (The light source goes off)
When the light source valve runs out The lamp monitor lights in red.
before it’s life.
If the above phenomenon is observed, it is necessary to replace the light source valve
and reset the timer as follows:
While holding on the MENU and SYNC- switches, press and hold the POWER switch
until the three monitor lamps (Operation monitor, Lamp monitor, and Temperature
monitor) start flashing simultaneously in orange (for approx. 3 seconds).