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Registration Adjustment (pje Mode Only) - Sony RA-3B Service Manual

Color rear video projector.
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2-10. REGISTRATION ADJUSTMENT (PJE)
FUNCTION OF BUTTONS OF REMOTE
COMMANDER FOR PJE MODE ONLY.
Adjustment
item up
Adjustment
item down
READ*
data up/down
Resetting the set to the factory shipping condition: Press 8.
"RESET" appears in green letters on the screen. Then press ENTER.
This resets all customer adjustments, channel memories, and channel
labels to the factory shipping settings.
Note: Internal patterns are used for geometry and convergence
adjustments. However, sizing and centering must be done with the
use of an external generator. The recommended pattern would be a
monoscope, or equivalent pattern, which would provide the means to
adjust both the linearity and the sizing of the picture. A cross-hatch
pattern with sizing markers can be used in place of a monoscope.
SETUP FOR ADJUSTMENT
• Current fl ow in circuit should be stable before attempting adjustment.
Wait 5 minutes after turning on power to the set.
• At the 4 sides of the screen, locate the middle. Use a tape measure
to identify the middle.
NOTE: The following steps # 1 through 8 are "main" defl ection
adjustments for sizing and centering. "Main" defl ection adjustments
affect all three CRTs at the same time. The "sub"-defl ection adjustments
that follow are made for each CRT individually. If the centering and
sizing is performed correctly in "main" defl ection adjustments, only minor
touchups may required for the green CRT in "sub"-defl ection adjustment
mode.
TV Power ON
Color Select
GRN to BLU to RED
Test signal select crosshatch +
video signal dots + video signal
crosshatch + black dots and black off
Mode select
(Course adjustment
Fine adjustment)
ENTER
: middle
A pattern from an external pattern generator must be used for the main
defl ection adjustments.
1. Enter the service mode by quickly pressing the keys on the remote
commander in the standby mode in the following order:
Press "DISPLAY," 5, Volume +, and then "TV POWER"
2. Change from TV mode to video input mode.
3. Input a cross-hatch pattern from an external generator that allows you
to properly center and size (over-scan) the pattern.
4. Select adjustment category "VPNT", adjustment item 0 "VPOS".
Adjust the data so that the external pattern is centered vertically.
5. Select adjustment category "VPNT", adjustment item 1 "VSIZ". Adjust
the data so that the external pattern is correctly sized vertically.
"Correctly sized" means that the picture is overscanned by 7.5%,
i.e. only 92.5% of the picture is on the viewable area of the screen.
Confi rm that the pattern is still correctly centered vertically.
6. Select adjustment category "VPNT", adjustment item 5 "HPOS".
Adjust the data so that the external pattern is centered horizontally.
7. Select adjustment category "VPNT", adjustment item 6 "VSIZ". Adjust
the data so that the external pattern is correctly sized horizontally.
"Correctly sized" means that the picture is overscanned by 7.5%,
i.e. only 92.5% of the picture is on the viewable area of the screen.
Confi rm that the pattern is still correctly centered horizontally.
8. Write the new sizing and centering data to memory by pressing
"MUTING" and then "ENTER".
9. Change the VPNT mode to "PJE 00 FDIS" (press "2" on the remote
until "PJE" appears on the top left corner of the screen). If "FDIS" is
not displayed below "PJE", press "4" until it does appear.
PJE
FDIS
10. Press the remote joystick button up arrow to set the FDIS data to
"01" to display the registration data of each area of the screen in the
fi ne adjustment mode.
PJE
FDIS
11. Press 6 to display the test signal (crosshatch) on the screen.
12. Select GRN CENT(*) with the 1 and 4 keys on the remote
commander.
GRN
CENT
*: In the factory preset, "GRN CENT" appears on the screen fi rst. To
change the color to red or blue, press the 3 key.
— 21 —
KP- 43T90 / 48V90 / 53V90 / 61V90
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