13
CP-X2520 ( M2-25ED ) / CP-X3020 ( M2-30ED )
Lamp does not light
What
is the state of
LAMP indicator D303
during operation?
Is
the LAMP
installation correct
?
Light
install the Lamp
PWB assembly
MAIN
Is the
voltage at
the (4) of E814 on
the PWB assembly MAIN
fi xed to "1~3V" during
warming-up?
NG
NO
Change
the lamp. Does
lamp light?
Lamp
Light
YES
Yes
Power unit (ballast) Power unit (circuit)
What
is the state of
TEMP indicator
D302?
PWB assembly SENSOR
Is
the voltage
at the (1) of E814 on the
PWB assembly MAIN set to
"L" during warming-
up?
Not light
and blink
PWB assembly MAIN
YES
“L” = 0V
Power unit (ballast)
No
Are
the voltage
supplied to the
pin (2) of connectors**
for DC fans soon after
the button is
pressed?
Observe
the voltage
waveforms at pin (1)
of connectors for DC fans**
soon after the button
is pressed.
Blinks
DC fan
(failed in above check)
Correct waveform is drawn below.
f 40Hz
PWB assembly
MAIN
NO (0V)
PWB assembly
MAIN
Correct
YES
incorrect
*: Be sure to unplug the power cord
before measuring resistance.
Not light
**: DC fan connectors are E801, E802,
E803, E806 and E807.
(5V or higher)
Lights
Measure
resistance* of
pins #2 to #3, #2 to #4,
#1 to #5 of cable connector
disconnected from
E302.
OK
PWB assembly
MAIN
#2 - #3 : 20 to 100k
#2 - #4 : 5 to 20k
#1 - #5 : approx. 94
NG
(open / short)
Not light
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