ViewSonic PJ1000 Service Manual - Page 13

Troubleshooting

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5. Troubleshooting .( Power can not be turned on Is the input voltage applied to the Power NO unit? YES • AC inlet Powe switch PWB ass'y filter Are voltage input at p ns 2, 3, NO ®, 2 of EPOW on the PWB easy signal? YES 0+12V +17V Power unit (circuit) Ii +13.5V © +6.3V 0 -8V PWB ass'y signal Lamp does not light What is the state of LAMP indicator? Light Not light Change the lamp Not light Is pin (Dot EBAR on the PWB ass'y NO signal set to 'Fr? YES 'If =5V Power unit (ballast) Light Lamp Power unit (ballast) PWB ass'y signal ViewSonic Corporation - 10 - Confidential- Do Not Copy PJ100

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5.
Troubleshooting
(
.
Power
can
not
be
turned
on
Is
the
input
voltage
applied
to the
Power
unit?
YES
Are
voltage
input
at
p
ns
2,
3,
®,
2
of
EPOW
on
the
PWB
easy
signal?
NO
•
AC
inlet
NO
YES
0+12V
+17V
+13.5V
©
+6.3V
0
-8V
PWB
ass'y
signal
Lamp
does
not
light
What
is
the
state
of
LAMP
indicator?
Not
light
Is
pin
(Dot
EBAR
on
the
PWB
ass'y
signal
set
to
'Fr?
Light
Powe
switch
Power
unit
(circuit)
Change
the
lamp
Light
Lamp
NO
YES
'If
=5V
Power
unit
(ballast)
Not
light
PWB
ass'y
filter
Power
unit
(ballast)
PWB
ass'y
signal
Ii
Confidential-
Do
Not
Copy
ViewSonic
Corporation
PJ100
-
10
-