B+ Check; X-Ray Test; B+ Confirmation; H-Raster Center Adjustment - Mitsubishi DPLUS 74SB -BKA Service Manual

5. B+ Check

(A) Mode: No.12.
(B) Pattern: Full White. (Brightness set to cut off)
(C) Check other power sources are: 82V ±2V, 13.6V ±0.3V, 6.2V ±0.3V, 49V ±1.5V, -11.5V ±0.5V.

6. X-RAY Test

(A) Mode: No.12
(B) Pattern: Normal Crosshatch (Brightness just cut off)
(C) Test
Apply a resistor(39K, 1/4W, 1%) between TP3 and TP4 then power on, Monitor should be active in X-Ray
protector.
7. H. V. B+ Confirmation
(A) Mode: No.12
(B) Pattern: Full Black(Brightness just cut off)
(C) Check that the high voltage is 25.5kV ±0.7kV.

8. H-Raster Center Adjustment

(A) Mode: No.18
(B) Pattern: Crosshatch Reverse
(C) Adjust the Brightness Control so that the background is visible.
(D) Change SW301 position to center background raster.
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