Sharp 50NP4 Service Manual page 24

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1. I C ADJUSTMENT ..............................................................................................................................................25
1-1. Memory Initialization (SDTV AND HDTV) ..............................................................................................25
1-2. Comb Filter Operation Check ................................................................................................................35
1-3. Audio Operation Check ..........................................................................................................................35
1-3-1. Tone Control Check ......................................................................................................................35
1-3-2. Constant Volume Operation Check ..............................................................................................35
1-3-3. SRS Check ..................................................................................................................................35
1-4. High Voltage Adjustment ........................................................................................................................36
2. FINAL ASSEMBLY ADJUSTMENT (Adjustment should be according to below order) ..............................36
2-1. Cut Off ....................................................................................................................................................36
2-2. DCU Phase Data Setting (Progressive and HD mode) ..........................................................................36
2-3. Horizontal Position Adjustment (Coarse) ................................................................................................37
2-4. Raster Tilt (Deflection Yoke)....................................................................................................................37
2-5. Beam Alignment ......................................................................................................................................37
2-6. Raster Position........................................................................................................................................38
2-7. Vertical Size (Progressive and HD mode) ..............................................................................................38
2-8. Horizontal Size (Progressive and HD mode) ..........................................................................................38
2-9. Beam Form ............................................................................................................................................39
2-10. Lens Focus..............................................................................................................................................39
2-11. Static Focus ............................................................................................................................................39
2-12. Digital Convergence (Progressive and HD mode)..................................................................................42
2-13-1. Raster Position ..........................................................................................................................43
2-13-2. Convergence Point ....................................................................................................................44
2-13. Blue Defocus ..........................................................................................................................................45
2-14. White Balance ........................................................................................................................................45
2-15. Sub Brightness........................................................................................................................................45
2-16. Horizontal Position (Progressive and HD mode) ....................................................................................46
2-17. Scanning Area Check ................................................................................................................................
3. ADJUSTMENT POINT ........................................................................................................................................47
3-1. CRT (R)(G)(B), Cabinet Locations ..........................................................................................................47
3-2. Main Chassis (Signal P.W.B.) ................................................................................................................48
3-3. Main Chassis (Power/Deflection P.W.B.) ................................................................................................49
3-4. Power Supply P.W.B. ..............................................................................................................................50
3-5. CPT (R)(G)(B), Focus Pack, Control P.W.B. ..........................................................................................51
*IMPORTANT
For many of the above adjustments, it is necessary to have an HDTV (1080i) signal generator, SDTV (480P) signal
genrator, as well as the usual NTSC (480i) signal generator.
Sharp recognizes that few companies offer HDTV or SDTV signal generators and that the cost of these generators
is sometimes prohibited. For this reason, we suggest the use of a set-top-box for HDTV and SDTV adjustments.
Usually, there is a switch on the set-top-box which enables it to output HDTV (1080i) or SDTV (480P) signals even
with no input. In this case, the sync is automatically detected by the TV (at the Y-P
SERVICE ADJUSTMENTS
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P Inputs on the rear panel).
B R