Hitachi 51F710A/DP55, Service Manual

Page: 26 / 187

25
DP
55
TO GO TO AN ADJUSTMENT, CLICK ON ITS HEADING BELOW
TABLE OF CONTENTS
SERVICE ADJUSTMENTS
1.
CHASSIS
ADJUSTMENT.
........
............................................
.........
.....................................................................
25
1-1. Service Menu Access
(Memory Initialize & Factory Reset) ......
...............................................................
.......
.........
26
1-2. Comb Filter Operation Check ................................................................................................................
28
1-3. Video Settings Check..............................................................................................................................
28
1-3-1. Color Temperature Check ............................................................................................................
28
1-4. High Voltage Adjustment ........................................................................................................................
28
2. FINAL ASSEMBLY ADJUSTMENT (Adjustment order)
....................................................
..............................
27
2-1. Cut Off Adjustment ..................................................................................................................................
28
2-2. DCU Phase Data Setting ......................................................................................................................
29
2-3. Horizontal Position Adjustment (Coarse) ................................................................................................
29
2-4. Raster Tilt (Deflection Yoke)....................................................................................................................
29
2-5. Beam Alignment ......................................................................................................................................3
0
2-6. Raster Position Adjustment ....................................................................................................................3
0
2-7. Beam Form Adjustment ..........................................................................................................................3
1
2-8. Vertical Size, Horizontal Size Adjustment
...............................................................
............................3
1
2-
10
. Lens Focus..............................................................................................................................................3
2
2-1
1
. Static Focus ............................................................................................................................................3
4
2-1
2
. Digital Convergence ..............................................................................................................................3
4
2-1
2
-1. Magic Focus Character Set Up ..................................................................................................
35
2-1
2
-2. Magic Focus Pattern Set Up ......................................................................................................
36
2-1
2
-3. Convergence Jig Screen Specification ......................................................................................4
3
2-1
2
-4. Raster Position Adju
s
tment ........................................................................................................4
4
2-1
2
-5. Convergence Point Adjustment ..................................................................................................4
4
2-1
2
-6. Magic Focus Initialize ................................................................................................................4
5
2-1
3
. Blue Defocus Adjustment ........................................................................................................................4
6
2-1
4
. White Balance Adjustment ......................................................................................................................4
6
2-1
5
. Sub Brightness Adjustment ....................................................................................................................4
7
2-1
6
. Adjustment
OSD Flow Chart ................................
..............................................................................................
48
2-1
7
. Horizontal Position Adjustment ..............................................................................................................5
8
2-1
8
. Scanning Area Check ............................................................................................................................5
8
2-1
9
.
Top/Bottom Panel Distortion Check ........................................
.............................................................5
9
2-
20
. Side Panel Distortion Check .............
.
................
......................................................
..........................................5
9
2-2
1
. I
2
C Parameter List ..................................................................................................................................
61
2-22. Protection Circuit Block Diagram .............................................................................................................91
2-23. Troubleshooting Flow Chart ..................................................................................................................93
*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).