Adjustments - Sony TRINITRON VAIO CDP-220AS Service Manual

• Landing Rough Adjustment
1. Enter the full white signal. (or the full black dots signal)
2. Set the contrast to "CONT"=MAX.
3. Make the screen monogreen.
Note: Off the outputs from R ch and B ch of SG.
4. Reverse the DY, and adjust coarsely the purity magnet (2-
pole Mg) so that a green raster positions in the center of
screen.
The 2-pole Mg adjustment must be done on the DY side (do
not use 2-pole Mg on the neck assy side).
Note: Stack 2-pole Mg on neck assy side with their sides flushed.
5. Moving the DY forward, adjust so that an entire screen be-
comes monogreen.
6. Adjust the tilt of DY, and fix lightly with a clamp.
Note: "TILT" shall be set at 0.
• Landing Fine Adjustment
1. Put the set inside the Helmholtz coil.
2. Input the single green signal.
(Adjust to L/D control brightness)
[L/D control brightness]
Adjust L/D after aging for 2 hours with L/D control bright-
ness
(1) L/D control brightness ......... 1/2 between cool L/D and
(2) Practical max brightness ...... 110 cd/m
[L/D control specification]
In Y axis : ± 7.5 um
At corners : ± 5.0 um
3. Demagnetize the CRT surface with the hand degausser , and
perform auto degaussing.
Note: Adjust in a non-magnetic field.
4. Attach the wobbling coil to the designated part of the CRT
neck.
5. Pull out the TLH correction piece up to the position where a
stopper is engaged.
6. Attach the sensor of the landing adjustment unit on the CRT
surface.
7. Adjust the DY position and purity, and the DY tilt.
For the purity adjustment, use 2-pole Mg on DY side.
8. Fasten DY with screw.
Note: Torque 22 ±2kg·cm (2.2 ± 0.2 Nm)
Perform auto degaussing.
SECTION 4

ADJUSTMENTS

Adjust color Knob
to non-color Knob.
hot L/D (Reference : ∑Ik =
200 uA)
∑Ik = 595 uA
2
– 15 –
Fixing DY with wedges.
a
"a" and "b" must be equal, and
"c" and "d" must be almost equal.
c
d
b
9. Adjust vertical swing with vertical pins, and also adjust hori-
zontal swing so that horizontal keystone and vertical tilt are
optimum, then fix with four wedges.
(When fixing DY with wedges, insert wedges completely so
that the DY does not shake.)
Note:
(1) Do not paste more than 2 magnets to one corner.
(2) Paste within 80 to 100 mm from the DY on the diagonal line
of the magnet.
<How to drive in wedges>
Apply a locking agent to the
upper wedges only.
In such a case, apply agent so that
it enters both sides of wedge and
also inside the DY.
10. Check the landing of each corner, and if they do not satisfy
the specification, paste a Disk-Mg onto the funnel and ad-
just.
11. If using the magnet, be sure to demagnetize with the hand
degausser and check.
12. Remove the sensor and wobbling coil.
13. Check that the DY is not tilting, and fix the purity Mg with a
white pen.
CPD-220AS