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Adjustment; Cut-off Adjustment; White Balance Adjustment - Sony Trinitron Multiscan CPD-1302 Service Manual

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3) Picture Periphery Convergence Adjustment
1.
For Y crosstalk, adjust with the Y crosstalk
correction magnet.
8
G
R
q
«
p
,
I
I
,
I
I
\ I
I
't'
/1\
I
I ,
/
I ,
/
I
,
d
6
'0
R
G
8
/ /
h
DY
1),
• d}u"",,"' ......
PJ!
Fig.
8
2.
Adjust with the X crosstalk adjustment magnet
when there is H TILT.
CPD-1302
3.
Adjust with the deflection yoke reactor correc-
tion coil when there is X crosstalk. (Fig-I 0)
In this case adjust with
8 coil A in Fig-ft.
In this cass adjust with
8
0....
",,0
R coil
8
in Fig.-ft.
....
...
..........
..".."""
G
O-----:~~----{)
G
.."
,,"
.............
""
...........
R~
"08
Fig. 10
adjustment magnet
BGR
000
RG8
000
When red dots are off
to
the
inside at the rightsnd left.
DY
Fig.
9
4.
Adjust with the deflection yoke reactor correc-
tion coil when there is X bow.
Fig. 11
- 5 -
R
In this case adjust with coil C
in Fig-l1 . At this time, put
D core in so that the marked
G
side is on side A. (Fig-l1)
Note: Paint D core after ad-
8
justment.
CPD-1302
11-3.
G
2
ADJUSTMENT
1
_I.
Cut off color check
(1)
Receive a 21.8 kHz TTL H. V. separate
SYNC signal.
(2) Set PICTURE, BRIGHTNESS (user cont-
rols), BA board SUB PICTURE VR
(RV251) and SUB BRT VR (RV252) to
minimum. Set R.G.B. BKG VR's (RV711,
721,731,) to minimum.
(3) Brighten the entire picture with the screen
VR, then gradually darken the picture and
note which color remains glowing at the
top of the picture .
2.
G
2
Adjustment (RV702)
(1)
Apply 140V DC to the cathode (CB board)
of the color which remained glowing for
cut off color check.
(2) Adjust the screen VR for optimum back-
ground over the entire picture.
(3) Set R.G.B DRIVE VR's (RV211, 221,
231) to maximum.
11-4.
CUT OFF ADJUSTMENT
1
1.
SUB BRT Setting
(1)
Input an all white signal. (TTL H.V sepa-
rate signal)
(2) Set PICTURE to maximum, and adjust BA
board SUB PIX VR (RV25
I)
so that the
luminance meter set at the top of the
picture is about 10 NIT.
(3) Perform white balance rough adjustment
with the BKG VR's of the two colors
which are not glowing as much.
(4) Set BRIGHTNESS to maximum, and ad-
just BA board SUB BRT VR (RV252) so
that the brightness is 40 NIT brighter than
the NIT value at this time.
2.
3 NIT Adjustment
(1)
Set BRIGHTNESS at center click and
PICTURE to minimum.
(2) Adjust an all white signal at 3 NIT to get
white balance with the RG.B. BKG VR's.
11-5.
WHITE BALANCE ADJUSTMENT
1
1.
Highlight Adjustment (during white peak)
(1)
Input an all white signal. (TTL H.V sepa-
rate signal)
(2) Set BRIGHTNESS and PICTURE to maxi-
mum.
3) Adjust picture luminance to about 100
(3) Adjust picture liminance to about 100
NIT with the BA board SUB PIX VR
(RV251), then adjust highlight white ba-
lance with R.G.B. DRIVE VR's.
2.
3 NIT Adjustment
(1)
Set BRIGHTNESS to center click and
PICTURE to minimum.
(2) Adjust white balance with R.G.B. BKG
VR's.
3.
Tracking
(I)
Repeat 2-3 times for white balance during
highlight and 3 NIT.
4.
MAX Luminance Adjustment
(1)
Set BRIGHTNESS and PICTURE to maxi-
mum, and adjust BA board SUB BRT VR
(RV252) for about 80 NIT.
BA BOARD
CA BOARD
~
RV731
- 6 -
~
RV721
~
RV711
RV231~
RV251
~
~
RV252
RV221
'r
RV211
(

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