Convergence Adjustment (1) - Sony TRINITRON PVM-14L5 Service Manual

Color video monitor
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2-10. Convergence Adjustment (1)

1. Input a dot pattern signal.
CONT ... Conspicuous position
BRT ... MIN
2. Align the horizontal R, G, and B dots at the center of
the screen with the H-START VR.
* When H-CENT is changed after H-STAT adjustment,
readjust H-STAT. (H-STAT will change by means of
H-CENT VR.)
3. Align the vertical location of R, G, and B in the center
of the screen with the V-STAT Mg. (Fig. 2-14, 2-15)
* 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.
I
I’
A
B
X
Y
Fig. 2-14 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.
I
I’
A
B
X
Y
Fig. 2-15 Bad example
4. For HMC, use the BMC Mg to adjust the R and B dots
so that they will be symmetrical horizontally with
respect to the G dot.
I
I’
R
G
B
A
B
A
A’
Control the BMC Mg so
6-pole magnet
that A=A’. Maintain I = I’
when moving the Mg.
Change the opening
degree of the BMC Mg
to control the HMC.
Fig. 2-16
5. For VMC, use the MBC Mg to adjust the R and B dots
so that they will be symmetrical vertically with respect
to the G dot.
R
G
B
Do not change.
(Top)
(Botton)
6-pole magnet
Make ajdustment so
For VMC control, turn
that the gap will be the
knob to the right or left
same at the top and botton.
without changing ther
opening degree of the
BMC Mg.
Fig. 2-17
6. Repeat adjustments 2. to 5.
* The above adjustment may affect the landing, so after
adjustment, check the landing again.
7. Paint-lock the knobs after adjustment.
2-21

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