Mitsubishi Electric 1786FD2 Service Manual page 72

MEA 1786FD2 CRT Monitor Service Guide
1. B¡ Þ Adjustment
a. Input mode 79.98K [WS7] with crosshatch Pattern.
b. Set contrast in OSD to maximal value and brightness in cut off.
c. Adjust main board VR701, let output Voltage : 50 ± 0.2V at D704(near L702).
2. HV Adjustment
a. Input mode 79.98K [WS7] with crosshatch pattern.
b. Adjust VR201to let anode voltage be 26 ± 0.1kV
3. H-size preset :
a. Input mode 31.47K with crosshatch pattern
b. Use OSD to adjust H-size maximum
c. Adjust VR301 to make H-size just over-screen above 16mm
4. Factory setting mode adjustment
1. H-phase : Set picture to the center of screen
2. H-Size : Set picture to 310 ± 2 mm
3. V-center : Set picture to the center of screen
4. V-size : Set picture to 230 ± 2¢ P
5. Parallelogram
6. Trapezoid : Set picture to rectangular or balance of top and bottom
7. Pincushion : Set picture to a real rectangular
8. Tilt : Let top tilt ±1.0mm and bottom tilt ±1.5mm between edge to edge
9. ABL :Let Y=31Ft-L ± 2Ft-L.
: Set picture to rectangular or balance
Alignment Procedure
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