Hitachi CP-WX11000 - Page 15

15
CP-WX11000 ( P6WX )
Lamp does not light
What
is the state of
LAMP indicator DY02
during operation?
Is the
LAMP installation
correct?
Light
Install the Lamp
NG
Change the
lamp. Does lamp
light?
Lamp
Light
YES
Power Unit
(Ballast)
Power Unit
(Circuit)
No
What
is the state of
TEMP indicator
DY03?
Thermistor
(E1/E2)
Is
the voltage
at the (1) of E811 on the
MAIN board set to
"L" during warm-
up?
No light
PWB assembly MAIN
YES
“L” = 0V
Power Unit (Ballast)
No
Are
voltages
supplied to 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:
f  40Hz
PWB assembly
MAIN
NO (0V)
PWB assembly
MAIN
Correct
YES
Incorrect
*: Be sure to unplug the power lead
before measuring resistance.
No light
**: DC fan connectors are E801,
E802, E803, E804, E806,
E807, and E808
(5V or higher)
Lights
Measure
resistance
of E1 and E2 after
disconnecting them
from the MAIN
board.
OK
PWB assembly
MAIN
E2: 5 to 20k
E1: 0.5 to 2k
NG (open / short)
Wait 20 seconds
PWB assembly
MAIN