Read Sony HMD-A420 (serv.man2) Service Manual online
HMD-A420
4-2
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”.
6.
Display crosshatch pattern with white lines and black
field.
7.
Adjust HMC and VMC with 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.
12. Adjust XCV with XCV VR.
13. Adjust YCH with YCH VR.
14. Adjust V.TILT with TLV VR.
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.
4-5. Vertical and Horizontal Position and Size
Specification
4-6. Focus adjustment
Adjust focus (V) and focus (H) for optimum focus.
4 Pole Magnet
6 Pole Magnet
TLH movement
R B
B R
XCV movement
YCH movement
R
B
TLV movement
Zero Position NECK Ass'y
a < 3.0 mm
b < 3.0 mm
b < 3.0 mm
A B
234 312
b
b
a
a
A
B
Focus (V)
Focus (H)
FBT
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