Picture Size And Geometry Adjustments; Full Mode Adjustment - Sony TRINITRON KD-34XBR2 Service Manual

SECTION 4. PICTURE SIZE AND GEOMETRY ADJUSTMENTS
Perform these adjustments when any of the following are replaced: CRT, defl ection yoke, D-board, and whenever touch-ups are required.
REQUIRED EQUIPMENT:
NTSC generator with monoscope pattern and cross-hatch pattern. (In lieu of the monoscope pattern, the cross-hatch pattern will suffi ce. However,
to correctly size the picture you must be able to calculate what percentage of the generator's full pattern is being displayed due to the over-scanning
of the CRT.)
NOTE: Throughout these adjustment procedures you will be instructed to "Write the data to memory". To do this, follow this procedure:
1. Press the "MUTE" button ("WRITE" appears in green letters at the top right corner of the screen).
2. Press the "ENTER" button ("WRITE" changes from green to red, then "WRITE" changes to "SERVICE").

4-1. FULL MODE ADJUSTMENT

SET-UP CONDITION:
Display Mode: FULL (NTSC)
Picture mode: STANDARD (select the STANDARD mode from the user
menu, then press the RESET button on the remote control to set the
STANDARD settings to the factory settings).
TILT CORRECTION: set to zero (from the user menu).
VERTICAL CORRECTION: set to zero (from the user menu).
PROCEDURE:
1. Enter the service mode.
2. Display the monoscope or cross-hatch pattern.
3. Set the data for VPOS to 27, then adjust SCRL so that the pattern is
centered vertically on the screen.
Monoscope Pattern
Device Name Adj. Item #
2150D-1 0
2150D-1 12
* Adjust as necessary to vertically center the pattern. If the monoscope
pattern is not available, use the cross-hatch pattern's center dot as the
reference point.
4. Write the data to memory.
5. Adjust the vertical size.
Device Name Adj. Item #
2150D-1 1
A
A = B
B
Name Data
VPOS 27
SCRL *
Name Data
VSIZ *
— 15 —
* Adjust to meet the following spec.:
Monoscope pattern: 11.6 boxes.
Cross-hatch pattern: 90% of the full pattern height.
Monoscope Pattern
6. Write the data to memory.
7. Adjust the pattern so that it is centered on the screen horizontally.
Do not change the HCEN data to center the pattern! Use HPOS
to center the pattern. HCEN centers the raster; HPOS centers the
picture on the raster.
Device Name Adj. Item #
2150D-2 1
* Adjust as necessary to horizontally center the pattern. If the
monoscope pattern is not available, use the cross-hatch pattern's center
dot as the reference point.
Monoscope Pattern
A
A = B
8. Write the data to memory.
KD-34XBR2
11.6 boxes
(monoscope
pattern only!)
Name Data
HPOS *
B