Hitachi 43FWX20B, Service Manual

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DP23/23G/24
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SERVICE ADJUSTMENTS
1. ASSEMBLED P.W.B ADJUSTMENT..................................................................................................................18
1-1. PIP Key Operation ..................................................................................................................................18
2. FINAL ASSEMBLY ADJUSTMENT (Adjustment should be according to below order) ..............................20
2-1. Cut Off Adjustment..................................................................................................................................20
2-2. DCU Phase Data Setting ......................................................................................................................20
2-3. Raster Position ........................................................................................................................................20
2-4. Vertical Size ..........................................................................................................................................21
2-5. Horizontal Size ......................................................................................................................................21
2-6. Lens Focus..............................................................................................................................................21
2-7. Digital Convergence ..............................................................................................................................23
2-7-1. Magic Focus Character Set Up ....................................................................................................24
2-7-2. Magic Focus Pattern Set Up ........................................................................................................24
2-7-3. Convergence Jig Screen Specification ........................................................................................26
2-7-4. Raster Position Adjsutment ..........................................................................................................27
2-7-5. Convergence Point Adjustment ....................................................................................................27
2-7-6. Magic Focus Initialize....................................................................................................................28
2-8. Blue Defocus ..........................................................................................................................................29
2-9. White Balance ........................................................................................................................................29
2-10. Raster Distortion Check ........................................................................................................................32
3. ADJUSTMENT POINT ........................................................................................................................................34
3-1. Control PWB (DP23/DP23G) ..................................................................................................................34
Control PWB (DP24) ..............................................................................................................................35
*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
B
P
R
Inputs on the rear panel).
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