24
SERVICE ADJUSTMENTS
1. I
2
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
B
P
R
Inputs on the rear panel).
Summary of Contents for 50NP4
Page 55: ...55 ...
Page 56: ...56 ...
Page 57: ...57 ...
Page 64: ...PRINTED CIRCUIT BOARD 61 2H Video Terminal P W B ...
Page 65: ...PRINTED CIRCUIT BOARD DEFLECTION P W B 62 ...
Page 66: ...PRINTED CIRCUIT BOARD SIGNAL P W B 63 ...
Page 67: ...PRINTED CIRCUIT BOARD VM SENSOR 2 64 ...
Page 68: ...PRINTED CIRCUIT BOARD POWER SUPPLY P W B 65 ...
Page 69: ...PRINTED CIRCUIT BOARD SRS P W B 66 ...
Page 70: ...67 WIRING DRESS DRAWING ...
Page 71: ...68 50NP4 WIRING DRAWING ...
Page 72: ...69 60NP4 WIRING DRAWING ...
Page 73: ...70 50NP4 WIRING DRAWING ...
Page 74: ...71 60NP4 WIRING DRAWING ...
Page 75: ...72 BLOCK DIAGRAM ...
Page 76: ...73 WIRING DRAWING ...
Page 90: ...88 ...