Purity Adjustment (Using Microscope) - Hitachi 36UX59B Service Manual

MSLXU
l-l Adiustment Preparation
(1) Keep DY slicked to CPT funnel.
(2) Turn ON the set and receive cross-hatch signal
(or circle pattern signal). Adjust the static conver-
gence coarsely according to item (VI1 1, l-4).
(3) Receive white pattern signal and adjust the white
balance according to item 4-6.
(4) Set BRIGHTNESS control and CONTRAST con-
trol to maximum and apply heat-run to the set
with circle pattern signal received for 40 min. or
more.
1-2 Puritv Adiustment
THIS ADJUSTMENT METHOD APPLIES TO
THE PURITY ADJUSTMENT BY USING
MICROSCOPE.
(1) Adjust coarsely White balance, Static conver-
gence (center) and Focus.
(2) Receive circle pattern and heat-run more than T
minutes with CONTRAST and BRIGHTNESS to
maximum. Do not delete the raster nor vary the
current before fixing the position of DY. Heat-run
should be done with perfect raster. (DY and tilt
should have been coarsely adjusted.)
Raster Wane NG
TABLE 1
CPT
T
A8OLJFSOX(W)
I
40 Min.
I
I I I
(3) The magnetic field in artificial magnetic field should
follow the table below and the set should face as in
Table 2. Degauss it from outside.
I
DESTINATION
I
VERTICAL
I
HORIZONTAL
FIELD
FIELD
I
1 I
I
USA 1 0.45G 1 0.3 G 1
TABLE 2
Directions for adjustment
(4) Adjust the position of purity magnet and DY. Keep
the landing balance of @ and @, and adjust so that
the landing of @ and @ is as follows while observ-
ing with a microscope.
0
9 GREEN
0
3 GREEN
Adjustment point
30mm away from each
end of @ and @
/
A' - B
Out Side
\
A' - B
Out Side
Phoiphor
2P (Purity Magnet)
(a) Open the purity magnet as follows in order to
move the raster only in the right-left direction.
C-F MAGNET
C-F MAGNET
P#2773671
P#2773672
Keep the balance of @/@ DY landing
2P (Purity Magnet)
(b) YPB (Yoke pull-back) should be as follows.
(Distance between the bumped position of DY
toward the funnel and the just-landing position of
@I and @.)
A80LJF30X(W) North
41