H Raster Center Adjustment; Picture Distortion Adjustments; 2-9.1. Ntsc (Drc) Full Mode Adjustment - Sony TRINITRON KV-27HS420 Service Manual

2-8. H RASTER CENTER ADJUSTMENT

Preparation:
• Input a monoscope signal.
• Set to NTSC (DRC) mode.
1. Set to Service Mode and adjust as follows:
CXA2170P-2
NO. Name Control Function
05 AGNG AGING 1, AGING 2
CXA2170D-2
NO. Name Control Function
01 HPOS Horiz Position
02 HSIZ Horiz Size
CXA2170D-3
NO. Name Control Function
00 HBLK Blanking Enable
2. Reduce HSIZ to see sides of raster. (See Figure A below)
3. Adjust H-Center with CXA2170D-2.
4. Adjust to the best screen position with H-CENT, then press MUTING
then ENTER to write into memory.
5. Restore aging, HSIZ and HBLK to original condition.
Raster Edge Equal:
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420
Data
2
Avg. Data
34
34
Avg. Data
0
RASTER
EDGES
RASTER
Figure A
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420

2-9. PICTURE DISTORTION ADJUSTMENTS

2-9.1. NTSC (DRC) FULL MODE
ADJUSTMENT
1. Face the picture tube in an east-west direction. (For best condition.)
2. Complete V-PIN and V-CEN adjustments fi rst (A2170-D1 06 V-PIN,
A2170-D1 05 V-CEN).
3. Input a monoscope and crosshatch signal. Adjust the picture
distortion with the following service parameters to balance the best
condition for these two signals.
NOTE: Make sure that the picture size is within specs. Vertical size
is 11.8 ± 0.1 sq. and horizontal size is 15.8 ± 0.1 sq.
4. Before changing modes, press MUTING then ENTER to write into
memory.
CXA2170D-1
Item 0. VPOS (V-POSITION)
Item 1. VSIZ (V-SIZE)
Item 3. VLIN (V-LINE)
Item 4. VSCO (VS-COR)
Item 9. HTPZ (H-TRAPEZOID)
20