Ba Board Adjustments; Pal Adjustments - Sony PVM-1444QM Service Manual

PVM-1 440QM/1 442QM/1
444QM
5-3.
BA
BOARD ADJUSTMENTS
-BA
BOARD (COMPONENT
SIDE)
-
NTSC
3.58
MHz ADJUSTMENT
(RV292)
1.
Receive
NTSC
3.58 color-bar signal.
2.
Connect an oscilloscope to pin
©
(COMPOSITE
IN) of
BA-2
connector.
3.
Confirm
the
Y-OUT
is
0.87
±0.5
Vp-p.
4.
Confirm
the residual
chroma
is
35 mVp-p
below.
When
it
is
above
35
mVp
p,
adjust with
RV1 and
T
1
inside
CFM201
while tracking.
2.
Confirm the voltage
on
pin
®
of
CTR210
is
above
5.0
V
DC,
and on
pin
©
of
CTR210
is
below
0.1
V
DC.
3.
Connect an
oscilloscope
to pin
©
of
A-15
con-
nector.
4.
Adjust
RV291
(4.43
SUB
HUE)
so that the
BLUE
OUT waveform
level
becomes
flat
as
following
figure.
Note
:
CONTRAST
Normal
condition
HUE
Normal condition
|
PAL
ADJUSTMENTS
(RV290)
5.
Connect an oscilloscope to pin
©
(B-OUT)
of A-1
5
connector.
6.
Adjust
RV292
(3.58
SUB
HUE)
so that the
BLUE
OUT
waveform
level
becomes
flat
as following
figure.
Note
:
CONTRAST
normal condition
HUE
Normal condition
NTSC
4.43
MHz ADJUSTMENT
(RV291)
1.
Receive
NTSC
4,43
color-bar signal.
1.
Receive
NTSC
4.43 color-bar
signal.
2.
Confirm the voltage
on pin
®
of
CTR210
is
above
5.0
V
DC, and on
pin
®
of
CTR210
is
below
1.0
V
DC.
3.
Connect
an
oscilloscope to pin
®
of
BA-2
co-
nnector.
4.
Confirm the
Y-OUT
is
0.90
±0.05 Vp-p and
the
residual
chroma
is
below
30
mVp-p.
-
22
-