Hitachi PJ-TX100, Service Manual

Page: 14 / 65

14
PJ-TX100(C11H)
Lamp does not light
What is the
state of LAMP indicator
D303 during operation?
Power unit (ballast)
Lamp
PWB assembly Main
Power unit (ballast)
Light
PWB assembly Main
YES
Not light
NO
YES
Change the lamp.
Does lamp light?
Power unit (circuit)
Not light
Install the Lamp
Light NG
Is the LAMP
installation correct?
YES
NO
What is the state
of TEMP indicator D302?
Not light
Blinks
DC FAN
(Lamp)
H (3.3V)
"L" = 0V
L (OV)
1
Is the
voltage at the
of E804 on the PWB
assembly Main fixed to "L"
during warming-up?
"L" = 0V
Measure
sure voltage at the
cathode pin of D841 on
the PWB assembly
Main.
DC FAN
(Panel)
YES
(Normal)
Does the
signal at the pin
of E801 have a amplitude
of 3.3V and a frequency
of 40Hz or
more?
PWB assembly Main
Is the voltage
at the of E804 on
the PWB assembly Main
set to "L" during
warming-up?
3
1
C
DC FAN
(Sub)
NO
YES
(L=0V)
Is the
voltage at the pin
of E806 on the PWB
assembly Main set
to “L” ?
*
NO
(Fan lock)
1