Omnivision PVQ-130W Service Manual page 107

Adjustment:
Pair of 4-Pole Convergence Magnet Rings,
Pair of 6-Pole Convergence Magnet Rings,
Pair of Purity Magnet Rings,
Deflection Yoke (CRT Unit),
G CUT -OFF (EVR)
Specification:
Refer to descriptions below.
Input:
Video Input Jack, Crosshatch Pattern Signal,
White Pattern Signal
Mode:
STOP
Equipment:
Degaussing Coil,
NTSC Video Pattern Generator,
White Pattern Generator
1. Remove the wedges from the CRT.
2. Set the Convergence Yoke as specified.
3. Power the unit "ON" and degauss the CRT by the Degaussing Coil.
4. Supply the Crosshatch Pattern Signal to Video Input Jack.
5. Turn the pair of 4-Pole Convergence Magnet Rings so that B and R at the center of
CRT overlap each other.
6. Turn the pair of 6-Pole Convergence Magnet Rings so that B and R which
overlapped each other in Step 5 overlap G.
7. Supply a White Pattern Signal to Video Input Jack.
8. Select G CUT -OFF in EVR adjustment mode and adjust it to become to the
minimum level. Turn the Pair of Purity Magnet Rings so that the distorted color
areas are approximately across from each other.
Slide the Deflection Yoke back slightly (without rotating it) until the distorted color
areas disappear from the screen.
9. Supply a Crosshatch Pattern Signal to Video Input Jack again. Confirm that the
Center Bar is at the horizontal center line of the CRT and the V-Center Bar is at the
vertical center line of the CRT. Then, tighten the Expansion Screw.
10. Press DISPLAY key (Service Switch) on the remote control for collapse scan.
(Refer toHOW TO ENTER SERVICE
Select G CUT -OFF in EVR adjustment mode and Adjust so that the horizontal line
is white.
11. Press DISPLAY key on the remote control again to return for full frame scan.
MODE.)
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