Convergence Adjustment - Sony TRINITRON PVM-14L1 Service Manual

2-8. Convergence Adjustment (1)
1. Input a dot pattern signal.
CONTRAST... Conspicuous position
BRIGHT... 0
2. Align the horizontal R, G, and B dots at the center of
the screen by adjusting RV760 on the C board. (H-
STAT adjustment)
* When H-CENT is changed after H-STAT adjustment,
readjust H-STAT. (H-STAT will change by means of
H-CENT VR.)
3. Using V STAT Mg, align the top and bottom of R, G
and B on center of the screen.
* After V-STAT adjustment, paint-lock the knob.
V-STAT Mg knob
While keeping the angles A and B equal (I =I'), align the
vertical convergence.
Y
Fig. 2-22 Good example
If the A and B knobs are not symmetrical (I # I'), the focus
may deteriorate, beam striking or other adverse effects may
occur.
Y
Fig. 2-23 Bad example
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
4. For HMC, use the six poles Mg to adjust the R and B
dots so that they will be symmetrical horizontally with
respect to the G dot. (Fig. 2-24)
I I" '
A B i ss
A A'
<> | +>
6-pole magnet
Control the six poles Mg so
that A=A'. Maintain 1=I'
Change the opening
when moving the Mg.
degree of the six poles Mg
to control the HMC.
Fig. 2-24
5. For VMC, use the six poles Mg to adjust the R and B
dots so that they will be symmetrical vertically with
respect to the G dot. (Fig. 2-25)
R G B
: (Top) O_O.
roe
~, Do notchange.
6. Repeat the adjustment steps from 2 through 5.
* The above adjustment may affect the landing, so after
adjustment, check the landing again.
7. Paint-lock the knobs after adjustment.
2-9