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NO
DC FAN
(Sub)
H (3.3V)
DC FAN
(Exhaust)
H (3.3V)
DC FAN
(B Panel)
H (3.3V)
DC FAN
(R/G Panel)
ViewSonic Corporation
Lamp does not light
What is the
state of LAMP indicator
D303 during operation?
Not light
Is the
*
voltage at the pin
(1) of E806 on the PWB
assembly MAIN set
to "L" ?
YES
(L=0V)
Measure
voltage at pin(1)
of E801 on PWB
assembly MAIN.
L (0V)
Measure
voltage at pin(1)
of E807 on PWB
assembly MAIN.
L (0V)
Measure
voltage at pin(1)
of E802 on PWB
assembly MAIN.
L (0V)
PWB assembly MAIN
Light
Is the LAMP
installation correct?
YES
Change the lamp.
Does lamp light?
Not light
Is the
voltage at the
(1) of E804 on the PWB
assembly MAIN fixed to "L"
during warming-up?
NO
Power unit (ballast)
What is the state
Blinks
of TEMP indicator D302?
Not light
Is the voltage
at the (3) of E804 on
the PWB assembly MAIN
set to "L" during
warming-up?
YES
Power unit (ballast)
13
NG
Install the Lamp
Light
YES
"L" = 0V
PWB assembly MAIN
Power unit (circuit)
NO
"L" = 0V
PWB assembly MAIN
Confidential - Do Not Copy
Lamp
PJ400-2
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