Sony TRINITRON PVM-14N1A Service Manual page 16

14 ineh 3-6. CONVERGENCE ADJUSTMENT
1. Input a dot pattern signal.
Purity control CONTRAST ....... Position providing good vision
Purity control BRIGHTNESS... MIN
2. Align the horizontal R, G, and B dots at the center of the
screen with the H-STAT VR. (*1)
*1: If the H-CENTER adjustment was after the H-STAT
adjustment, re-adjust the H-STAT.
(The H-CENT SW changes the H-STAT too.)
3. Align the R, G, and B at the center of the screen with the
V-STAT magnets. (*2)
*2: After the V-STAT adjustment, paint on the knobs to lock
them.
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A B
20 inch
x
Purity control PUY Cone!
Y Y
Good example Bad example
V-STAT magnet knobs If the A and B knobs are not
While keeping the angles symmetrical (I=I'), this has
for A and B equal (I=I'), bad effects. The focus may de-
align the vertical conver- teriorate and beam striking
gence. may occur.
4. ForHMC, use the 6-pole magnet to adjust the R and B dots to
be symmetrical left and right about the G dot. (*1)
's 1 I /
A'= Ss "
4 » 4 oa R G B
A A' Fig. 1 :
A B
A A'
—_ - | «>
Fig. 2 Fig. 3 Fig. 4
6-pole magnet
The HMC adjustment Adjust the 6-pole magnet so
changes the opening of the that A=A'. You must maintain
6-pole magnet. the relationship I=I' while
moving the magnet.
Fig. 5 Fig. 6 Fig. 7
Fig. 8 Fig. 9 Fig. 10