Dell P992 Service Manual

Also see for P992: Quick setup guide Quick setup guide Service manual

Dell P992 Service Manual Manual pdf 19 page image

P992 (E) 3-1SECTION 3ADJUSTMENTS• Landing Rough Adjustment1. Display all white pattern (or black dot pattern).2. Set contrast to 255.3. Display green plain pattern.4. Side back DY and roughly adjust green plain pattern to be centered onthe useful screen with Purity Magnet.5. Adjust DY tilt.Note: Set ROTATION to 128 and LCC_NS to 128 when adjusting DY tilt.6. Lightly tighten the DY screw.• Landing Fine AdjustmentNote: (1) After adjust W/B (9300k), measure the average of ΣIK with allwhite video input, while CONTRAST is maximum andBRIGHTNESS is center. And adjustment shall be made so that themiss-landing become least after aging 2H with the IK 30% ofmeasured value shown above.(2) The magnetic field shall be BH = 0.(3) When adjusting at other than BH = 0, calculate the shifted valuefrom BH = 0.1. Put the monitor in helmholz coil.2. Set as follows;LCC_SW = 0 (LCC Correction Current = 0)FUNCTION_SW bit1 = (Auto Degauss = On)CONTRAST = 2553. Display green plain pattern.4. Degauss the iron part of chassis with a hand degausser and degauss coil.5. Degauss CRT face with a hand degausser again.6. Input AC 230V to AC IN and turn the monitor off and on. Then auto-degauss works.7. Reset FUNCTION_SW bit1 to 0 (auto-degauss = off)8. Degauss CRT face with a hand degausser again.9. Attach wobbling coil to the specified place on CRT neck.10. With landing checker, adjust DY position, purity, DY center andlanding of the 4 corners.11. Check landing of the 4 corners, and adjust using magnet if they are notin the specification.The red and blue must be within thespecification given right with respect to thegreen.A difference between red and blue must bewithin the specification given right.Adjust so that the green is within thespecification given right.4 corner adjust target : within ± 1Note: (1) Do not attach more than 2 magnets on one corner.(2) Attach magnets within the range of 80 - 100 mm from DY.(3) Be sure to degauss and check when used magnets.0 ± 3 0 ± 7.5 0 ± 30 ± 3 0 ± 7.5 0 ± 30 ± 3 0 ± 7.5 0 ± 3(μm)± 6 ± 6 ± 6± 6 ± 6 ± 6± 6 ± 6 ± 6(μm)10 10 1010 7 1010 10 10(μm)