Service Adjustments - Hitachi 51F510 DP43 Service Manual

TO GO TO AN ADJUSTMENT, CLICK ON ITS HEADING BELOW
1. ASSEMBLED P.W.B ADJUSTMENT..................................................................................................................31
1-1. Service Menu Access (NTSC, SDTV and HDTV) ..................................................................................31
1-2. Comb Filter Operation Check ................................................................................................................32
1-3. Video Settings Check..............................................................................................................................32
1-3-1. Color Temperature Check ............................................................................................................32
1-4. High Voltage Adjustment ........................................................................................................................32
2. FINAL ASSEMBLY ADJUSTMENT (Adjustment should be according to below order) ..............................32
2-1. Cut Off Adjustment..................................................................................................................................32
2-2. DCU Phase Data Setting ......................................................................................................................33
2-3. Horizontal Position Adjustment (Coarse) ................................................................................................33
2-4. Raster Tilt (Deflection Yoke) ....................................................................................................................33
2-5. Beam Alignment......................................................................................................................................34
2-6. Raster Position Adjustment ....................................................................................................................34
2-7. Beam Form Adjustment ..........................................................................................................................35
2-8. Side Pin Distortion, Vertical Size, Horizontal Size, Trapezoid Distortion Adjustment ............................35
2-9. Lens Focus..............................................................................................................................................36
2-10. Static Focus ............................................................................................................................................38
2-11. Digital Convergence ..............................................................................................................................38
2-11-1. Magic Focus Character Set Up ..................................................................................................39
2-11-2. Magic Focus Pattern Set Up ......................................................................................................40
2-11-3. Convergence Jig Screen Specification ......................................................................................44
2-11-4. Raster Position Adjustment ........................................................................................................45
2-11-5. Convergence Point Adjustment ..................................................................................................45
2-11-6. Magic Focus Initialize..................................................................................................................46
2-12. Blue Defocus Adjustment........................................................................................................................47
2-13. White Balance Adjustment......................................................................................................................47
2-14. Sub Brightness Adjustment ....................................................................................................................48
2-15. Sub-Picture Signal Amplitude Adjustment ..............................................................................................49
2-16. Horizontal Position Adjustment ..............................................................................................................50
2-17. Scanning Area Check ............................................................................................................................50
2-18. Top and Bottom Panel Distortion Check ................................................................................................51
2-18-1. Side Panel Distortion and Top/Bottom Panel Distortion Check ..................................................51
2-19 CRT Adjustment Points ..........................................................................................................................52
2-20. I 2 C Parameter List ..................................................................................................................................53
2-21. RS232C Communication Specification ..................................................................................................72
2-22. Protection Circuit Block Diagram ............................................................................................................82
2-23. TroubleShooting Flowchart ....................................................................................................................83
2-24. DC Voltages ............................................................................................................................................89
2-25. Waveforms ..............................................................................................................................................99
3-0. Signal Block Assembly..........................................................................................................................108
3-1. Main Chassis Deflection Block Diagram P.W.B.....................................................................................109
3-2. Power Deflection/Convergence P.W.B...................................................................................................110
3-3. CPT (R)(G)(B), Focus Pack ..................................................................................................................111
3-4. Control P.W.B. ......................................................................................................................................112
*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
TABLE OF CONTENTS

SERVICE ADJUSTMENTS

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P Inputs on the rear panel).
B R
DP43