Convergence Adjustment (1); V-Stat Mg Knob - Sony TRINITRON PVM-14L2 Service Manual

2-10. Convergence Adjustment (1)

1. Input a dot pattern signal.
CONTRAST... Conspicuous position
BRIGHT... MIN
2. Align the horizontal R, G, and B dots at the center of
the screen by adjusting RV708/C board.
* When H-CENT is changed after H-STAT adjustment,
readjust H-STAT. (H-STAT will change by means of
H-CENT VR.)
1 * 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
A
X
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.
A
X
Fig. 2-15 Bad example
2-12
I'
B
Y
I I'
B
Y
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'
A B
6-pole magnet
Change the opening
degree of the BMC Mg
to control the HMC.
Fig. 2-16
5. For VMC, use the BMC Mg to adjust the R and B dots
so that they will be symmetrical vertically with respect
to the G dot.
Do not change.
(Top)
(Bottom)
6-pole magnet
For VMC control, turn
knob to the right or left
without changing their
opening degree of the
BMC Mg.
Fig. 2-17
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.
R G B
A A'
Control the BMC Mg so
that A=A'. Maintain I = I'
when moving the Mg.
R G B
Make adjustment so
that the gap will be the
same at the top and bottom.
PVM-14L2/20L2