Christie D Series Service Manual page 18

CNOSS: SENSOR-A PCB
CNISS: SENSOR-B PCB
Is
voltage
supplied to the pin
(2) of connectors** for fans
soon after the STANDBY/
ON button is
pressed?
10V or higher (E802~E807)
11V or higher (E801)
YES
Observe
the voltage
waveforms at pin (1)
of connectors** for fans soon
after the STANDBY/
ON button is
pressed.
E801: R PANEL FAN E802: G PANEL FAN
E805: EXHAUST FAN 2 E806: EXHAUST FAN 1 E807: POWER FAN E808: B PANEL FAN
LWU720i/LHD720i/LWU620i Service Manual
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Lamp does not light.
Is the LAMP
indicator (DY03) lighting?
NO
What
is the state of TEMP
indicator (DY04)?
Lighting
the MAIN PCB set to "L"
Measure
resistance*
between pins of
harnesses CNOSS and CNISS
after disconnecting them
from the MAIN
PCB.
NG
**: E801~E807
NO
Replace MAIN PCB.
**: E801~E807
OK (all of them shape square pulse)
Replace MAIN PCB.
E803: LAMP FAN 1
*: Be sure to unplug the power cord before measuring resistance.
YES
NG
Re-install LAMP
UNIT.
Off
Is
the voltage
at the (1) of E814 of
NO
during warming-
up?
YES ( 0V)
OK
POWER UNIT BALLAST.
Replace MAIN PCB.
YES
Wrong power unit (ballast)
has been installed.
Install correct ballast after
power unit (ballast).
NO
Replace MAIN PCB.
OK
Replace LAMP UNIT.
E804: LAMP FAN 2
the LAMP UNIT is installed
correctly.
OK
Replace
Turn
the power
on again after cooling
the lamp turn off in about 1 minute
after the message "Please
displayed?"
NO
Is the
voltage of the pin
(4) of E814 of the MAIN
during warming-
up?
YES
Try
replacing the LAMP
UNIT.
NG
Replace
POWER UNIT CIRCUIT.
or
Replace
POWER UNIT BALLAST.
17