Service Adjustments - Hitachi 53SDX20BB Service Manual

1. ASSEMBLED P.W.B ADJUSTMENT..................................................................................................................14
1-1. Service Menu Access (NTSC, SDTV and HDTV) ..................................................................................14
1-2. Comb Filter Operation Check ................................................................................................................22
1-3. Audio Operation Check ..........................................................................................................................22
1-3-1. Tone Control Operation Check ....................................................................................................22
1-3-2. Perfect Volume Operation Check ................................................................................................22
1-3-3. SRS Surround Operation Check ..................................................................................................22
1-3-4. BBE Surround Operation Check ..................................................................................................22
1-4. High Voltage Adjustment ........................................................................................................................23
2. FINAL ASSEMBLY ADJUSTMENT (Adjustment should be according to below order) ..............................23
2-1. Cut Off Adjustment ..................................................................................................................................23
2-2. DCU Phase Data Setting (Normal and 1080i Throught mode) ..............................................................23
2-3. Horizontal Position Adjustment (Coarse) ................................................................................................24
2-4. Raster Tilt (Deflection Yoke)....................................................................................................................24
2-5. Beam Alignment ......................................................................................................................................24
2-6. Raster Position........................................................................................................................................25
2-7. Vertical Size (Normal Mode Only) ..........................................................................................................25
2-8. Horizontal Size (Normal Mode Only) ......................................................................................................25
2-9. Beam Form ............................................................................................................................................26
2-10. Lens Focus..............................................................................................................................................26
2-11. Static Focus ............................................................................................................................................28
2-12. Digital Convergence (Normal and 1080i Throught mode) ......................................................................28
2-12-1. Magic Focus Character Set Up ..................................................................................................29
2-12-2. Magic Focus Pattern Set Up ......................................................................................................30
2-12-3. Convergence Jig Screen Specification ......................................................................................31
2-12-4. Raster Position Adjsutment ........................................................................................................32
2-12-5. Convergence Point Adjustment ..................................................................................................32
2-13. Blue Defocus ..........................................................................................................................................34
2-14. White Balance ........................................................................................................................................34
2-15. Sub Brightness........................................................................................................................................35
2-16. Sub-Picture Signal Amplitude Adjustment ..............................................................................................37
2-17. Horizontal Position (Normal and 1080i Throught mode) ........................................................................38
2-18. Scanning Area Check (Normal and 1080i Throught mode)....................................................................38
2-19. Raster Distortion Check (Normal and 1080i Throught mode) ................................................................39
*IMPORTANT
For many of the above adjustments, it is necessary to have an HDTV (1080i or 720P) signal generator, SDTV
(480P) signal generator, as well as the usual NTSC (480i) signal generator.
Hitachi recognizes that few companies offer HDTV or SDTV signal generators and that the cost of these
generators is sometimes prohibitive. 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 720P) or
SDTV (480P) signals even with no input. In this case, the sync is automatically detected by the TV (at the Y-P
Inputs on the rear panel).

SERVICE ADJUSTMENTS

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