Sony TRINITRON HMD-A420 Service Manual page 20

4. Display crosshatch pattern with red and blue lines and
black field.
5. Adjust H.STAT and V.STAT with 4 pole magnet. Use
4 pole magnet, not "HSTAT" and "VSTAT".
4 Pole Magnet
6. Display crosshatch pattern with white lines and black
field.
7. Adjust HMC and VMC with 6 pole magnet.
6 Pole Magnet
8. Display crosshatch pattern with red and blue lines and
black field.
9. If necessary, repeat steps 5-8.
10. Change "CONV_OFF_NDX" to "3".
11. Adjust H.TILT with TLH plate.
TLH movement
R B
12. Adjust XCV with XCV VR.
XCV movement
13. Adjust YCH with YCH VR.
YCH movement
R
14. Adjust V.TILT with TLV VR.
B R
B
4-2
TLV movement
15. If necessary, repeat steps 3-14 to make the optimum
condition for the entire screen.
16. Fix 4-pole magnet, 6-pole magnet and XCV VR with
white paint.
Zero Position NECK Ass'y
4-5. Vertical and Horizontal Position and Size
Specification
a
a
A
B
b b
4-6. Focus adjustment
Adjust focus (V) and focus (H) for optimum focus.
Focus (H)
FBT
HMD-A420
a < 3.0 mm
b < 3.0 mm
A B
234 312
Focus (V)