Sony KP-48V75 Service Manual page 36

3-5. DEFLECTION YOKE TILT ADJUSTMENT
1. Set to receive the Monoscope signal.
2. Set in service mode.
3. Use VP on the service mode menu to show only the green
color.
4. Loosen the deflection yoke set screw and align the tilt of the
Deflection Yoke so that the bars at the center of the monoscope
pattern are horizontal.
5. After aligning the deflection yoke, fasten it securely to the
funnel-shaped portion (neck) of the CRT.
6. The tilt of the deflection yoke for red is aligned with RG-RH
on the service mode menu, and the tilt on the deflection yoke
for biue is aligned with RG-BH on the service menu, is aligned
the same as was done for green.
4-pole magnet
2-pole magnet
Neck Assy
Fig. 3-6
3-6. 2-POLE MAGNET ADJUSTMENT
1. Set in service mode.
2. Set to receive the Dot signal.
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Turn the green VR on the focus block to the right and set to
overfocus to enlarge the spot.
5. Now align the 2-Pole Magnet so that the enlarged spot is in
the center of the Just Focus spot.
6. Align the green focus VR and set for just (precise) focus.
7. Perform the same alignment for red and blue.
Use the center dot
Fig. 3-7
Deflection yoke
Anode cap
3-7. 4-POLE MAGNET ADJUSTMENT
1. Set in service mode.
2. Set to receive the Dot signal.
3. Remove CN302 connector for A board
4. Place the caps on the red and blue lens so that only the green
color is shown.
5. Turn the green VR on the focus block to the left and set to
underfocus to enlarge the spot.
6. Now align the 4-Pole Magnet so that the enlarged spot be-
comes a perfect circle.
7. Perform the same alignment for red and blue.
Use the center dot
3-8. DEFOCUS ADJUSTMENT (Blue)
1. Receive the crosshatch signal
2. Adjust the FOCUS knob so that the crosshatch pattern verti-
cal line width is as in the figure on the right.
3. Blue only defocus Adjustment.
[Focus adjustment point]
– 35 –
KP-48V75/53V75/61V75
RM-Y903
RM-Y903
x
/
y
x : y = 1:1
Fig. 3-8
48" : 12–15mm
53" : 13–16mm
61" : 13–16mm
Fig. 3-9
RM-Y903