B+ Check; X-Ray Test; B+ Confirmation; H-Raster Center Adjustment - Mitsubishi Diamond Pro 750SB Service Manual

5. B+ Check

(A) Mode: No.12.
(B) Pattern: Full White. (Brightness set to cut off)
(C) Check other power sources are: 80V ±2V, 7V ±0.5V, 30V ±1.5V, -14V ±1V, 14V ±1V.

6. X-RAY Test

(A) Mode: No.12
(B) Pattern: Normal Crosshatch (Brightness just cut off)
(C) Test
Apply a jumper wire between TP1 and TP2 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) Adjust VR301 to make the high voltage has 25kV ±0.1kV for Mitsubishi CRT, 26kV ±0.1kV for
Samsung CRT.

8. H-Raster Center Adjustment

(A) Mode: No.13
(B) Pattern: Crosshatch Reverse
(C) Adjust the Brightness Control so that the background is visible.
(D) Adjust VR501 to make the raster mostly near center background position.

9. Preset Adjustment

(A) Mode No.12
(B) Pattern: Cross hatch
(C) Enter to Factory mode. Adjust H-phase, V-center, H-size, V-size, Pincushion, Trapezoid, Bow,
Parallelogram Top-corner, Bottom-corner, and rotation to make Picture Position Center and Picture Size
315*237mm.

10. G2 Voltage Adjustment

(A) Mode No. 12
(B) Pattern: Full Black
(C) Adjust: Monitor should be warm up more than 30 minutes.
(D) Adjust screen VR to make G2 voltage 680V±10V for Mitsubishi CRT.
(E) Adjust screen VR to make G2 voltage 560V±10V for Samsung CRT.
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