Read Sharp XG-C455W (serv.man5) Service Manual online
XG-C455W/PG-C355W
5 – 3
Lamp fails to light-up
Turn on the power switch.
Is discharging sound heard
from lamp?
Is discharging sound heard
from lamp?
YES
Is the lamp out of
socket?
socket?
YES
Reconnect the lamp into
socket.
socket.
NO
NO
Replace the lamp.
Is the ballast cooling fan running?
YES
Check the cooling fan cir-
cuits.
cuits.
NO
Does the power LED
flash red in 0.5 second
interval?
flash red in 0.5 second
interval?
YES
Check the “RCS” signal.
(Air filter cover/Lamp door/
Lens door)
(Air filter cover/Lamp door/
Lens door)
NO
Is the DC voltage of 380V applied to pin(1) of P702 connector?
NO
Check the power supply cir-
cuits.
cuits.
YES
Is LOW LEVEL voltage
applied between pins(3)
and (4) of Main's P1702
connector?
applied between pins(3)
and (4) of Main's P1702
connector?
NO
Is the P1702 connector
disconnect?
disconnect?
NO
The lamp light-up. After
about 30 seconds, the
TEMP LED flash red and
the lamp turn off.
about 30 seconds, the
TEMP LED flash red and
the lamp turn off.
YES
Check the TEMP1,
TEMP2 and TEMP0
signal line.
TEMP2 and TEMP0
signal line.
YES
YES
NO
Replace the ballast.
Reconnect it into
socket correctly.
socket correctly.
Check the microprocessor
and its peripheral circuits.
and its peripheral circuits.
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