Mitsubishi Electric Diamond Pro 930SB, Service Manual

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4-14
19. Adjustment Magnetic Field
Vertical: +40uT, Horizontal:
±
0uT(Neutral)
* Notes About Degaussing Method
Follow the degaussing procedure as below. (To prevent intertwinement of aperture grille.)
1) Use stick type degaussing probe at demagnetizing CRT.
Do not use ring type degaussing probe.
2) In order to remove a magnetization from front, top, bottom and side of CRT, and bottom chassis.
Do not switch off the degaussing probe abruptly. Move the degaussing probe slowly when degaussing.
Note: If switch off the degaussing probe near the set, the set will be magnetized.
3) Degaussing method
When switch on the degaussing probe, keep distance between panel surface and degaussing probe
more than 50cm. Move the degaussing probe vertically facing to the panel surface.
Keep distance of panel surface and degaussing probe to more than 15mm.
Starting from edge of CRT, move the degaussing probe toward CRT center in circular motion, spending
6 to 7 seconds. (Rounding about 4 or 5 times.)
Vertical
Horizontal
4) After sufficiently degaussing the CRT, move the degaussing probe slowly away from the panel surface
while rotating from corner to center, taking more than 3 seconds. Turn off SW more than 1m away from
the CRT. Degauss again if the unit is magnetized.
Over 1m
SW OFF
Magnetized Pattern Example