Hitachi 43FDX01B, Service Manual

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11
SERVICE ADJUSTMENTS
1. ASSEMBLED P.W.B ADJUSTMENT..................................................................................................................12
1-1. Memory Initialization (NTSC, SDTV and HDTV) ....................................................................................12
1-2. Comb Filter Operation Check ................................................................................................................15
1-3. Audio Operation Check ..........................................................................................................................15
1-3-1. Tone Control Operation Check ....................................................................................................15
1-3-2. Perfect Volume Operation Check ................................................................................................15
1-3-3. SRS Surround Operation Check ..................................................................................................15
2. FINAL ASSEMBLY ADJUSTMENT ..................................................................................................................16
2-1. Raster Position........................................................................................................................................16
2-2. Vertical Size (Progressive mode)............................................................................................................16
2-3. Horizontal Size (Progressive and HD mode) ..........................................................................................16
2-4. Convergence Adjust (Progressive and HD mode) ..................................................................................17
*IMPORTANT
For many of the above adjustments, it is necessary to have an HDTV (1080i) signal generator, SDTV (480P) sig-
nal 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 genera-
tors is sometimes prohibitive. For this reason, we suggest the use of a set-top-box for HDTV and SDTV adjust-
ments. Usually, there is a switch on the set-top-box which enables it to output HDTV (1080i) or SDTV (480P) sig-
nals 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).