Sony TRINITRON KV-ES34M90, Service Manual

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KV-ES34M90
RM-916
4-3. FOCUS ADJUSTMENT
Note
Focus adjustment should be completed before W/B adjustment.
(1) Receive digital monoscope pattern.
(2) Set "A/V CONTROL" to "STANDARD".
(3) Adjust FOCUS VR so that the center of the screen becomes
justfocus.
(4) Change the receiving signal to white pattern and blue back.
(5) Confirm MAGENTA RING should not be over the limit.
In case MAGENTA RING is over the limit, adjust FOCUS VR
to take tracking of MAGENTA RING and FOCUS.
FLYBACK TRANSFORMER (T6803)
Focus
4-4. NECK ASSY TWIST ADJUSTMENT
(1) Receive dot/hatch pattern.
(2) Turn FOCUS VR fully counter-clockwise.
(3) Confirm the dot shape at the screen center. (Fig. 4-4)
(4) Resume FOCUS VR.
Note
In case of turning NECK ASSY, loosen the screw 3 turns. Do not
move the position.
OK
Turn NECK ASSY clockwise.
Turn NECK ASSY counter clockwise.
Fig. 4-4
Fix a Permalloy assy corresponding to the misconverged
areas.
b a
c d
a-d : screen-corner
misconvergence
a
b
c
d
Permalloy assembly
(3) Screen-corner Convergence
Screen (No Function)