Hitachi C11XMB Service Manual page 13

Lamp does not light
state of LAMP indicator
D303 during operation?
voltage at the pin
NO
DC FAN
(1) of E806 on the PWB
(Sub)
assembly MAIN set
voltage at pin(1)
H (3.3V)
DC FAN
of E801 on PWB
(Exhaust)
assembly MAIN.
voltage at pin(1)
H (3.3V)
DC FAN
of E807 on PWB
(B Panel)
voltage at pin(1)
H (3.3V)
DC FAN
of E802 on PWB
(R/G Panel)
PWB assembly MAIN
CP-X444(C11XMB)/CP-X440(C11XM25)
What is the
Light
Not light
Is the
*
Blinks
to "L" ?
YES
(L=0V)
Measure
L (0V)
Measure
assembly MAIN.
L (0V)
Measure
assembly MAIN.
L (0V)
NG
Is the LAMP
installation correct?
YES
Light
Change the lamp.
Does lamp light?
Not light
Is the
YES
voltage at the
"L" = 0V
(1) of E804 on the PWB
assembly MAIN fixed to "L"
during warming-up?
NO
Power unit (ballast) Power unit (circuit)
What is the state
of TEMP indicator D302?
Not light
Is the voltage
at the (3) of E804 on
the PWB assembly MAIN
set to "L" during
"L" = 0V
warming-up?
YES
PWB assembly MAIN
Power unit (ballast)
13
Install the Lamp
Lamp
PWB assembly MAIN
Filter unit
NO