Setup Adjustments; Landing Adjustment; Deflection Yoke Neck Adjustment - Sony Trinitron Multiscan CPD-1302 Service Manual

SECTION 1
SETUP ADJUSTMENTS
11-1.
LANDING ADJUSTMENT
1
Preparations:
1. Face the set CRT surface toward the east or
west in order to lessen the effect of geomagne-
tism.
2. Turn the set power switch on and degauss.
Adjustment:
1. Input an all white signal.
2. Perform rough adjustment of white balance,
screen (G2), horizontal convergence and focus.
The purity adjustment knob should be at the
center position at this time. (Fig-I)
3. Set CA board R BKG VR (RV71l) to maxi-
mum and G BKG VR (R V721) and B BK-G VR
(RV731) to minimum.
4. Move the deflection yoke back and adjust the
purity magnet so that the entire picture is as
shown in Fig-2.
5. Adjust
110
that the entire picture becomes red
while moving the deflection yoke forward.
6. Use the G BKG VR (RV72 I) and B BKG VR
(RV731) to check and adjust each color follow-
ing steps 3 - 5.
7. When landing at the corners is not correct, per-
form magnet correction (Fig-3 I).
8. When the position of the deflection yoke is
finalized, secure with the bracket.
Purity
V.STAT
6-po/e megnets
RV711
R.BKG
RV721
G.BKG
- 3 -
,;
'"
Fig. 1
Fig. 2
Purity control corrects
isar .
, /
,;
, /
..,,,"'" 0
, /
:0
I
I
I
I
I
I .... ( )
..... ......
......
......
,;
.......
",;
Fig. 3
CPD-1302
purity megnet
o
o
CPD-1302
11-2.
DEFLECTION YOKE NECK ADJUSTMENT
I
Perform this adjustment when there is misconver-
gence and pincushion distortion at the top and
bottom of the picture.
1. Tilt the deflection yoke up and down to adjust
when the pincushion distortion is not the same
at the top and bottom of the picture. (Fig-4)
Fig. 4
2. When there is misconvergence at the top and
bottom of the picture as shown in Fig-S ,tilt
the deflection yoke to the left and right to
adjust.
Fig. 5
1) Convergence Adjustment for Picture Center (H.
STAT, V. STAT)
1. Input a dot signal, and with BRT at minimum,
adjust for optimum picture with PICTURE.
2. Line up picture center and horizontal direc-
tion RGB dots with H. STAT VR (RV703).
3. Line up picture center and vertical direction
RGB dots with V. STAT magnet.
2) Picture center horizontal direction asymmetri-
cal misconvergence (HMC)
Picture center vertical direction asymmetrical
misconvergence (VMC)
4. For HMC, move the six-pole magnet to adjust
so that the Rand B dots are symmetrical to the
right and left of the G dot.
5. For VMC, move the six-pole magnet to adjust
so that the Rand B dots are symmetrical above
and below the G dot.
- 4 -
HMC
VMC
R
R
G B
A
O·
-0-
"0 G
A B
B
A+B
A'tB
B
Dot Movement due to 6·pole Magnet movement
HMC VMC
6 ; " , . . - - - .............
~'
Fig. 6
Fig. 7
R
J
G
o
d
B beam movemenlR
when moved in
direction
A
G B
o
~am
movement
d
;hen moved in
direction
A
G
~B ~::,: :~~:;~~tl
o
direction B G
o
R
6-po/e megnets
Purity
~em
movement
d
~hen
moved in
B direction B