Sony FD-42A - Channel Display Adjustment

Luminance (BRT) Adjustment
ector. 1
ligital
.
Bridge
the
pattern
according
to
the
mark
on
the
neck
of
the
picture
tube.
LJ
5
mark
pattern connection
(R871)
2. Turn BRT knob (RV853) fully counterclock-
wise and then turn CONTR knob (RV401)
fully clockwise.
3.
Connect
the
digital
voltmeter
across
R860.
4.
Adjust
the
RV802
for
9.0V
dc
reading
on
the
digital
voltmeter.
If
not,
disconnect
pattern
connection
@)
and
connect
@®
and
adjust
again.
digital voltmeter
@
“ a ih
Front
eras) ®
Nr
oO
T
Channel Display Adjustment
.
Set
the
BAND
SELECT
switch
to
VHE.
.
Turn
the
TUNING
knob
fully
clockwise.
.
Turn
the
TUNING
knob,
set
the
dial
pointer
to
the
letter
“2”
on
dial
scale.
Adjust
RV151
for
the
optimum
picture.
In
the
area
where
an
off-the-air
signal
can
not
be
tuned
in,
adjust
RV151
for
2.2V
reading
on
VOM.
...
(V.L.
START)
.
Turn
the
TUNING
knob,
set
the
dial
pointer
~
to the letter “6” on dial scale.
Adjust
RV152
for
the
optimum
picture.
In
the area where an off-the-air signal can not be
tuned
in,
adjust
RV152
for
18V
reading
on
VOM. ... (V.L. END)
.
Turn
the
TUNING
knob,
set
the
dial
pointer
to
the
letter
‘‘7”’
on
dial
scale.
Adjust
RV153
for
the
optimum
picture.
In
the
area
where
an
off-the-air
signal
can
not
be
tuned
in,
adjust
RV153
for
8.4V
reading
on
VOM.
...
(V.H.
START)
.
Turn
the
TUNING
knob,
set
the
dial
pointer
to
the
letter
‘13’
on
dial
scale.
Adjust
RV154
for
the
optimum
picture.
In
the
area
where
an
off-the-air
signal
can
not
be
tuned
in,
adjust
RV154
for
20V
reading
on
VOM.
...
(V.H.
END)
.
When
tuning
in
all
the
off-the-air
signals
(VHF
CH2-13)
capable
of
receiving,
make
sure
that
the
dial
pointer
is
correctly
set
to
the
dial
scale.
— A BOARD —
L202 L203
VIF and AFT Adjustments
1. Tune in an off-the-air signal.
2.
Adjust
L202
(VIF)
and
L203
(AFT)
for
the
best picutre.
8.
Set
the
BAND
SELECT
switch
to
UHF.
9.
Turn
the
TUNING
knob,
set
the
dial
pointer
to
the
letter
‘‘69”
on
dial
scale.
Adjust
RV155
for
the
optimum
picture.
In
the
area
where
an
off-the-air
signal
can
not
be
tuned
in,
adjust
RV155
for
22V
reading
on
VOM.
...
(U.LEND)
.
When
tuning
in
all
the
off-the-air
signals
(UHF)
capable
of
receiving,
make
sure
that
the
pointer
is
correctly
set
to
the
dial
scale.
ead
|
-
-
RV2071
RF AGC Adjustment
1. Tune in an off-the-air signal.
2,
Adjust
RV201
so
that
snow
noise
disappears
from the picture.