Sony Trinitron PVM-1271Q Service Manual page 2

CMPTR
connector
(25-pin)
Pin assignment
7 ^
Pin
No
Signal
Signal
level
1
*
iBM
select
Highs*ate(5V):
IBM mode
Low
state
:
3
Bit
TTL
2
High
state
(5
V
or open)
:
Audio
inputs from
pin
13.
'0
;
Audio
inputs from
the
LINE
A AUDIO
IN jack
3
H. sync
or composite sync
Negative
polarity
When
the high state
is selected
at pin 9
1
V
p-p,
75-ohm
terminated
When
the iow
state
is selected
at pin 9
TTL
level
4
5
6
Blue
input
Positive polarity
When
the high state
is
selected
at nin
g
•
Green
input
terminated, non
sync)
.
1
When
the low
state
is
selected
at pin 9
Red
input
Digitai signal
(TTL
level)
7 --12 V
power
supply
0.3
A max
8
-k
5
V
power
supply
0.6
A max
9*
Analog/digital
mode
select High
state (open)
;
Analog
signal
(0.7
V
p-p)
Low
state (ground)
:
Digital
signal
fnLJe^
Pin No.
Signal
level
10 RGB/NORMAL
mode
select High
state
(5
V
or open)
:
RGB
inputs from
a microcomputer
ow
state (ground)
:
Composite
video inputs
from
the LINE
A
VIDEO
IN connector
11
^
Negative
polarity
TTL
level
12
®
(5
V
or open)
:
Video
inputs from a microcomputer
only
Low
state (ground)
:
Composite
video
input
from
the LINE
A
VIDEO
IN connector
During the low
state, the video signal
from
the microcomputer
is
blanked and
the
compos.te
v,deo
Signal from
the LINE
A
VIDEO
IN connector
is
supSposS
over
the
signai
from
the microcomouter
uKCMniposeo
over
13
-5
dB
(
100 O/.
modulation), input
impedance more
than 47
k
ohms
14
15-24
bX
1
/IN
1
mode
sync switch
High
state (open)
:
Sync
signal input
from
the
CMPTR
connector
Low
state
;
Sync
signal input
from
the LINE A
VIDEO
IN connector
Ground
—
25
*
BM
luminance
signal
Positive polarity
When
the high state
is selected
at pin
1
:
TTL
ievel
When
the low
state
is selected
at pin
1
;
Low
state (oroundl
* Examples
for microcomputer connections
^'^'''\^Pin
No.
Microcomputer^\
1 9
25
SMC-70/SMC-70G
—
High
state
iBM computer
High
state
Low
state iBM
luminance
signal
TTL
3BIT computer
Low
state Low
state Low
state
While
the information given
is
true at
the time
of
printing, small
pro-
duction changes
in
the course
of our company's
policy of
improve-
ment
through research
and
design might
not necessariiy
be
in-
dicated
in
the
specifications.
We
would ask you
to
check
with vour
appointed
Sony
dealer
if
clarification
on any
point
is required.
i
I
-
2
—