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connector of
a
r
control panel)
HC-2
connector
'te
phase
differ-
i
l-^
—
5
±0.
1
ps
IV
DC
-IV
DC
86
(H.
CE
NT-21
87
(H.
CENT
VR)
PVM-2130QM
PVM-2130QM
RM-668
RM-668
4-4.
B
BOARD
ADJUSTMENTS
/
Chroma
Adjustment
|
1.
Inpu
t
a
PAL
color bar
signal.
Z
Connect an
oscilloscope to
pin
of
IC301,
and
ad-
just so that
chroma component
is
minimum
on
pin
of IC301
waveform
while tracking with
L451
(4.43
MHz).
3.
input
a
NTSC
(3.
58) color bar
signal.
4.
Connect
an
oscilloscope
to
pin
of IC301
and
ad-
just so that
croma component
is
minimum
on
pin
of IC301
waveform
while tracking with
L4S2.
COLOR BALANCE
Adjustment
|
1.
input
a
SECAM
color bar
signal
and
set
PICTURE
to
maximum.
Press
"RESET"
to set
color
to
standard
state.
2.
Observe
blue
output ITP33)
waveform on
the
osillo-
scope
and
adjust
L421
(B-Y) so
that the
black portion
of
the color
bar
is
the
same
level
as the pedestal.
3.
Observe blue output (TP31)
waveform on
the
oscillo-
scope
and
adjust
L405
(R-Y)
so that the black portion
of
the color
bar
is
the
same
level
as the pedestal.
AN
TI-PAL,
LINE
CRAWLING
Adjustment
|
1.
Input
a
PAL
color bar
signal
and
set
PICTURE
to
maximum.
Press
"RESET"
to set
COLOR,
HUE
and
BRT
to
stan-
dard
state.
2.
Confirm
that there
is
no
color
on
the
first
anti-PAL
signal
frames
at the right
and
left
of
the
picture.
If sides
while tracking with
R
V303.
3.
Adjust
T301 (DAT)
for
minimum
line
crawling.
4.
Confirm
the
anti-PAL adjustment
in
2,
and
repeat
3,
and
1
if
necessary.
A
PC
Ad
jus
tmen
t
|
443
adjustment
1.
Input
a
PAL
color bar
signal.
2.
Short pin (n)
and
pin
on
IC30t.
3.
Adjust
CT443
to
get color
sync.
3.
58
adjustmen
t
4.
Input
a
NTSC
(3.
58
MHz)
color bar
signal.
5.
Adjust
CT358
to
get color
sync.
ACC,
HUE CENT
Adjustment
|
1.
Input
a
PAL
color bar
signal
and
set
PICTURE
maxi-
mum.
2.
Adjust
R\/302
(ACC
ADJ)
so that
blue
output (TP33)
waveform
is
as
shown
in figure.
@
_
© ® @
2.2
±0.3Vp-p
-.
1
-
3.
Input
a
NTSC
(3.58
or
4.43) color
bar
signal
and
set
PICTURE
to
maximum.
Press
"RESET"
to set
COLOR,
HUE
and
BRIGHT-
NESS
to
standard
state.
4.
Adjust
RV318
(S.
HUE)
so that blue
output (TP33)
waveform
is
as
shown
in figure.
B Board
L452 L451
RV318
RV303
O
CT443\
_
*0
T301
CT358
TP31
RV302
o
L405
@
IC301
1
CT358
(3.58)
CT443
(4.43)
L405
(R-Y)
L421
(B-Y)
L451
(4.43
MHz)
L452
(Y/CHROMA)
RV302
(ACC)
RV303
(<I>)
RV318(S.
HUE)
T301 (DAT)
oscilloscope
4-5.
SAFETY CHECK ADJUSTMENT
HOLD
DOWN
ADJUSTMENT
(*R53I)
1.
Turn
the
POWER
switch
ON, and
receive entirely
white
signals
and
set
the
PICTURE
and
BRIGHTNESS
control
to
maximum.
2.
Confirm
that the voltage
of
the
IC1510
(7)
pin
is
more
than
15.78V
DC
when
the
set
is
operating
normally
with
120V
AC
supply.
3.
Adjust
ABL
current
to
1400±30pA
with
PICTURE
and
BRIGHTNESS,
(ammeter
3.0mA
derange)
4.
Confirm
that there
is
less
than
18.35V
DC
where
by
the
raster
disappears
during operation of
hold-down
circuit.
(HOLD
DOWN
check point of
IC1510
(t) pin)
5.
Adjust
ABL
current
to
210
t
3 pA
with
PICTURE
and
BRIGHTNESS,
(ammeter
0.3mA
dc
range)
6.
Confirm
that there
is
less
than
19.25V
DC
where
by
the
raster
disappears during operation
of hold-down
circuit.
(HOLD
DOWN
check point of
IC1510(^pin)
Note:
If
the
hold-down
circuit starts
operating
in
the
above
case,
switch
OFF
the
POWER
of
the
set
immediately.
7.
If
above
steps
is
not
satisfied,
select resistance
value
of
R597
and
repeat
above
steps
1
through
6.
T604
FBT
step
® ®
ammeter
0.3mA
dc
range
SECTION
DIAGRAIV
5-1.
CIRCUIT
BOARDS
LOCATION
20
-
-
21
-
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