15
PJ-TX300(C11H2)
Lamp does not light
What
is the state of
LAMP indicator DK03
during operation?
Is the
LAMP installation
correct?
Light
install the Lamp
PWB assembly
MAIN
Is
the voltage
at the (1) of E804 on
the MAIN board fixed to "L"
during warming-
up?
NG
YES
“L” = 0V
Change the
lamp. Does lamp
light?
Lamp
Light
YES
Not light
Power unit (ballast)
Power unit (circuit)
No
What is the state of
TEMP indicator DK02?
Is the
voltage at the
(3) of E804 on the PWB
assembly MAIN set to "L"
during warming-
up?
Not light
PWB assembly MAIN
YES
“L” = 0V
Power unit (ballast)
YES
Are the
voltage supplied to
the pin (2) of each connectors for
DC fans soon after the button
is pressed?
Is the
voltage supplied
to the pin (4) of E801
soon after the button
is pressed?
Are the
voltage supplied to
the pin (4) of E801 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
NO (0V)
PWB assembly
MAIN
Correct
YES
YES
incorrect
Not light
and blink
(1V or higher)
(5V or higher)
E801(2)
E802(2)
E806(2)
E807(2)
E801(1)
E802(1)
E806(1)
E807(1)