Epson EMP-7300 Service Manual page 57

counted the total running hours and has written the running data in IC 413. The
lamp will run only 100 hours after the orange and the red lamp indicators start to
blink alternately, so you should replace the lamp as soon as possible. (If the lamp
indicators blink alternately from beginning, the lamp life is no more than 100 hours.
Therefore the lamp life may be suddenly terminated.)
2.When the total running hour exceeds 2000 hours (the lamp is used),the lamp will not
run before you replace it with a new lamp inner housing.(You can't replace with
used lamp inner housing ) Once you start up with a new lamp inner housing, the
fuse on the FU board is blown, so it doesn't recognize as a new one.
The figure 2-33 shows the control circuit.
EEPROM
(IC413)
Power Supply Unit
AC power
Lamp inner
housing
Lamp
CD10FU board
CD10FC Board
CD10MA Board
CN600
BACTA
LPSTC
CN500
CN103
+5V
LSTAT
CN100
CD10DR Board
1 2
Figure2- 41 Lamp inner housing control
2-28
Lamp indicator
Main CPU
(IC415)
+5VD
1K
7.5
Signal meaning
LTPCL: Light power supply control signal
LPFAL: Light power supply failure
LLIFE: Lamp life
LFUSE: FU board fuse is blown
Generator
(X400)
IC600
LPCTL
LPFAL
LLIFE
LFUSE
REV.A