ViewSonic PJ1000 Service Manual - Page 15
ViewSonic, Corporation, PJ101k
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UPC - 766907204018
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Picture is not displayed only when the VIDEO signal is input Is picture displayed both selected VIDEO1 and VIDEO2? NO YES Is the 1/2 selected signal changed at pin (I) of PVD1 on the PWB ass'y input terminal VIDEO? YES NO PWB ass'y signal 0 V=VIDEO1, =VIDEO2 (-1-r=5V) I PWB ass'y input terminal VIDEO Is a vo tags input at pin d of NO PVD1 on the PWB ass y input terminal VIDEO? YES 6 +5V PWB ass'y signal S Are the input signals output at pins 0, ®, '5,/ NO of PVD1 on the PWB ass'y input terminal VIDEO? YES C) Video signal Y signal C signal PWB ass'y input terminal VIDEO PWB asst' signal ViewSonic Corporation - 12 - Confidential • Do Not Copy PJ101k _
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Picture
is
not
displayed
only
when
the
VIDEO
signal
is
input
Is
picture
displayed
both
selected
VIDEO1
and
VIDEO2?
NO
Is
a
vo
tags
input
at
pin
d
of
PVD1
on
the
PWB
ass
y
input
terminal
VIDEO?
YES
Is
the
1/2
selected
signal
changed
at
pin
(I)
of
PVD1
on
the
PWB
ass'y
input
terminal
VIDEO?
YES
NO
PWB
ass'y
signal
0
V=VIDEO1,
=VIDEO2
(
-
1-r=5V)
PWB
ass'y
input
terminal
VIDEO
YES
6
+5V
Are
the
input
signals
output
at
pins
0,
®,
‘5,/
of
PVD1
on
the
PWB
ass'y
input
terminal
VIDEO?
NO
PWB
ass'y
signal
NO
YES
C)
Video
signal
Y
signal
C
signal
PWB
asst'
signal
PWB
ass'y
input
terminal
VIDEO
I
S
ViewSonic
Corporation
-
12
-
Confidential
•
Do
Not
Copy
PJ101k
_