JVC AV-27D502/R Service Manual page 26

AV-27D502
ADJUSTMENT OF DEFLECTION
Measuring
Item
instrument
V CENTER and Signal
generator
TRAPEZIUM
Adjustment
V-SIZE and Signal
generator
V-LINEARITY
Adjustment
Screen size
Screen
size 90%
Picture size 100%
H POSITION Signal
Adjustment generator
PIP DISPLAY
POSITION
Adjustment
LEFT POS.
UPPER POS.
LOWER POS.
Main screen size
26
Test point Adjustment part
No.68 V CENTER
No.78 TRAPEZ
No.66 V SIZE
No.65 V LIN
Picture
size 100%
No.72 H POSI
No.11 LEFT POS.
No.12 RIGHT POS.
No.13 UPPER POS.
No.14 LOWER POS.
RIGHT POS.
Main
80%
screen
±2%
size
80% ±2%
Note:
Proceed to the following this adjustment after having completed the
adjustments of SUB BRIGHT and SUB CONTRAST.
1. Receive a crosshatch signal.
2. Adjust the No.68 V CENTER of the PICTURE MODE to be the same
between the CRT vertical center and crosshatch vertical center.
3. Adjust the No.78 TRAPEZ of the PICTUER MODE to be the vertical
lines straight.
4. Confirm the vertical lines to be straight. If it is not straight, adjust to
be straight at the No.78 TRAPEZ.
Note:
Proceed to the following this adjustment after having completed the
adjustments of SUB BRIGHT and SUB CONTRAST.
1. Receive a crosshatch signal.
2. Select the No.66 V SIZE of the PICTURE MODE to squeeze the
laster.
3. Adjust the No.65 V LIN of the PICTURE MODE to be symmetrical.
4. Adjust the No.66 V SIZE until the vertical screen size is 90%.
Note:
Proceed to the following this adjustment after having completed the
adjustments of FOCUS, SUB BRIGHT, SUB CONTRAST, V CENTER,
TRAPEZIUM, V-SIZE and V-LINEARITY.
1. Receive a crosshatch signal.
2. Select the No.72 H POSI of the PICTURE MODE.
3. Adjust the No.72 H POSI until the screen will be horizontally centered.
Notes:
• Proceed to the following this adjustment after having completed the
adjustments of V CENTER, TRAPEZIUM, V-SIZE, V-LINEARITY and
H POSITION for the main picture.
• Set VIDEO STATUS to "STANDARD".
1. Receive a broadcast.
2. Select the PIP MODE from the SERVICE MENU.
3. Then adjust the PIP screen size so that it occupies 80% ± 2% of the
main screen area.
No. 51797
Description