Convergence Adjustment; Power Saving Function Inspection; Magnetic Field Allowance Inspection - Mitsubishi Electric DPro930SB-BK Service Manual

14. Convergence Adjustment

(A) Receive signal 11
(B) Pattern: Cross hatch.
(C) Adjust H-CONVERGENCE, V-CONVERGENCE by OSM in Factory Mode to both around 50%.
(D) Use the convergence meter to check whether within the spec. If it cannot be within the spec, adjust
Yoke coil and VR to make be follow the spec.
Zone A :X, Y ≤0.25mm (within the 266mm diameter circle)
Zone B :X, Y ≤0.3mm (within 356*266mm)
(5) After convergence adjustment, readjust Focus to best performance.

15. Power Saving Function Inspection

(A) Mode: No.13
(B) Pattern: Full white
(C) Input: Maximum rating voltage
(D) Inspection
1. It should be into power off Mode when the both horizontal sync and vertical sync are disabled
after 5 seconds. Check the LED color "Orange" and the power consumption must be less than
4W.
2. It should be recovered the normal Mode when the both horizontal sync and vertical sync are enabled.
Check the picture is normal and LED color "Green".
16. Magnetic Field Allowance Inspection (At tube axis direction check)
(A) Mode: No.11, Full White (crosshatch reverse) pattern.
(B) Check the screen size is adjusted "356*266mm".
(C) After connect degauss coil to External degaussing signal generator, start at the same time both
"GEGAUSS (+)" pushing and External degaussing signal generator running.
(D) As following procedure, confirm "landing error on screen" by visual check.
1) Set Full Red Pattern (Crosshatch Reverse)
2) Set magnetic field to "Bh=0.00mT".
3) Start at the same time both "DEGAUSS (+)" pushing and External degaussing signal generator
running.
4) Uneven color is not observed by visual check. When uneven color observes, it should be rejected.
5) Set magnetic field to "Bh=+0.03mT".
B
4-9
A
266mm
356mm