Sony PVM-1444QM Service Manual page 42

CIRCUIT
BOARDS LOCATION
1
I
2
6-5.
SCHEMATIC DIAGRAMS
4
I
5
U (PVM-1
440QM)
pote
:
All
capacitors
are
in
nF
unless
otherwise noted.
pF
:
uwF 50
WV
or less are
not indicated
except
for
electrolytics.
Indication of resistance,
which does not
have one
for
rating electrical
power,
is
as follows.
(PVM-1444QM)
(PVM-1442QM)
QF
(PVM-1
440QM)
QB
(PVM-1444QM)
\
QD
(PVM-1442QM)
\
QG
(PVM-1440QM)
QE (PVM-1442QM)
The
inner schematic diagrams
(IC302, 304, 305, 307, 308,
503):
See page 66—68
a
B':
Pitch
:
5
mm
Rating
electrical
power
1/4W
All resistors are
in
ohms.
Htefrdj
-
:
nonflammable
resistor.
:
fusible resistor.
A
:
internal
component.
c
B
:
panel designation
and adjustment
for repair.
All
variable
and
adjustable resistors
have
characteristic
curve
B,
unless otherwise noted.
When
replacing
the
part
in
below table be sure to
perform
the related adjustment.
Part replaced
Adjustment 030
10501.0503,0504,0505.0506,
D509, D510, C505, C520, C524,
C525, C526, C527, C528, C529.
C530, C531, R500, R506. R516,
R51
7.
R518. R519, R520, R521,
R522, R523, R524, R525, R526,
R528. R804, NL501.
HVR
R500
(HOLD-DOWN)
All
voltages
are
in
V.
Voltage
are
dc with
respect to
ground
unless otherwise
noted.
Readings
are
taken with
a color-bar signal input.
Readings
are
taken with
a
PAL
color-bar signal input.
Voltage
variations
may
be noted due
to
normal produc-
tion tolerance.
B+
bus.
B-
bus.
signal path.
No
mark
:
with
PAL
color-bar signal received or
common
voltage.
(
; :
with
SECAM
color-bar signal received.
:
with
NTSC
3.58
color-bar signal
received.
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BOARD
XA-1
A-7
7P
WHT
4.
43-H
1
VDD
2
Cs)
3
(hj
4
v)
T
(i)
,
6
GND
7
PLS
X
SW
'
COMP BLK
LA
H-RET PLS
SYNC IN
50-H 5
SECAM-H 6
R-Y
(SECAM)
7
B-Y
(SECAM)
9
GND 9
4.
43-H
10
U (B-Y)
1 I
V (R-Y) "l2
H-PLS 13
QND
1
4
BURST OUT
Is
A-8
15P
WHT
TO
BA BOARD
BA-1
BURST
in ,
HUE
CONT
T
KILLER
(H)
3
GND
4
FROM ACC
T
QND
6
TQ ACC
T
QND
8
SC
-
1
N 9
s-sw
10
y-out
oT
GND oT
SY-U
13
vcc
1
4
COMPOSITE
in
IS
A-9
r
i
Q410
DTC144ES
BURST-MUTE
Q308
ZSC278S
SY-AMP3
i i
R322
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I
220 f
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