Sony PVM-1444QM - AV CONNECTOR AND SAFETY WARNINGS; Critical Safety Precautions

AV
(EURO-TV)
connector
(21-pin)
-
20
16
16
14
12
10 B 6
4
2
°
Y
iddd
!
I
21
19
17 15 13
11 9 7 5
3
1
Pin No.
Signal
Description
i
Audio
output
B (right)
Standard level.
0.5
Vrnrts
Output
impedance:
Less
than
1
k ohm*
2
Audio
input
B
(right)
Standard
level:
0 5
Vrms
Input
impedance:
More
than
10
k
ohms*
3
Audio
output
A
(left)
Standard
level:
0.5
Vrms
Output
impedance:
Less
than
1
k
ohm
*
4
GND
for audio
GNO
5
GND
for
blue
input
GND
6
Audio
input
A (left)
Standard
level:
0.5
Vrms
Input impedance:
More
than
lOkohms*
7
Blue
input
0.7 V ±3dB,
75
ohms
8
Function
select
(AV
control)
High
state
(9.5-
12
V):
Peri mode
Low state
(0
-
2
V):
TV mode
Input
impedance: More
than
10
k
ohms
Input
capacitance:
Less
than 2
nF
Pin No.
Signal
Description
s
GND
for green input
GND
10
NC
11
Green
input
|
(Same as
Pin
7)
12
NC
13
GND
for
red
input GND
14
GND
for
blanking
input GND
15
Red input
(Same as
Pin
7)
16
Blanking input
High state (1
-
3 V)
Low
stale
(0
-
0.4 V)
Input
impedance:
75 ohms
17
GND for
video output
GND
18
GND
for video input
GND
19
Video output*
*
1 V ± 3 dB, 75
ohms
Sync: 0 3
V
(^3
dB)
20
Video
input
1 V ±3
dB,
75 ohms
Sync:
0.3 V (±3dB)
21
Common
GND
(plug,
shield)
GND
•
at
20Hz
-
20
khz
*
*
Outputs
the
video signal fed
through the
LINE
A connector,
when
the
AV input mode
is selected
Design
and
specifications
subject
to
change
without notice.
I
TABLE OF
CONTENTS
Section
Title
Page
1.
GENERAL
1
-
1 . Features
4
1
—
2.
Location
and
Function
of
Parts
and
Controls
5
2.
DISASSEMBLY
2-1.
Rear
Cover
and
Top
Cover
Removal
9
2-2.
Terminal
Board
Removal
9
2-3.
Bracket
of
Terminal
Board
Removal
10
2-4.
Control
Unit
Removal
10
2-5.
Note on
Wiring
the
Troida!
Coil
and
It’s
Peripheral
Part
10
2-
6.
Picture
Tube
Removal
11
3.
SET UP
ADJUSTMENTS
3-
1.
Beam
Landing
12
3-2.
Convergence
13
3-3.
Focus
14
3-4.
White
Balance
15
4.
SAFETY
RELATED
ADJUSTMENTS
16
WARNING
!
!
AN
ISOLATION
TRANSFORMER
SHOULD
BE
USED
DURING
ANY
SERVICE
TO
AVOID
POSSIBLE
SHOCK
HAZARD,
BECAUSE
OF
LIVE
CHASSIS.
THE
CHASSIS
OF
THIS
RECEIVER
IS
DIRECTLY
CON-
NECTED
TO
THE
AC
POWER
LINE.
Section
Title
Page
5.
CIRCUIT
ADJUSTMENTS
5-1.
A
Board
Adjustments
18
5-2.
XA
Board
Adjustment
21
5-
3.
BA
Board
Adjustments
22
6.
DIAGRAMS
6-
1.
Frame
Schematic
Diagram
25
6-2.
Block
Diagrams
27
6-3.
Printed
Wiring
Boards
36
6-4.
Circuit
Boards
Location
41
6-5.
Schematic
Diagram
41
6-
6.
Semiconductors
69
7.
EXPLODED
VIEWS
7
-
1 . Chassis
71
7-
2.
Picture
Tube
72
8.
ELECTRICAL
PARTS
LIST
73
SAFETY
RELATED
COMPONENT
WARNING
!!
COMPONENTS
IDENTIFIED
BY
SHADING
AND
MARK
ON
THE
SCHEMATIC
DIAGRAMS,
EXPLODED
VIEWS AND
IN
THE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUBLISHED
BY
SONY.
CIRCUIT
ADJUSTMENTS
THAT
ARE
CRITICAL
TO
SAFE
OPERATION
ARE
IDENTIFIED
IN
THIS
MANUAL.
FOLLOW
THESE
PRO
CEDURES
WHENEVER
CRITICAL
COMPONENTS
ARE
REPLACED
OR
IMPROPER
OPERATION
IS
SUSPECTED.
-
3
-