JVC AV-21D114 Service Manual page 22

4.7.5 DEFLECTION CIRCUIT ADJUSTMENTS
• The setting (adjustment) using the remote control unit is made on the basis of the initial setting values.
• The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
• When performing deflection circuit adjustment, adjusts PAL signal (fv: 50 Hz) in 4:3 mode, and adjust the NTSC signal (fv: 60 Hz)
similarly.
Note:
Proceed to the following adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE.
4. DEF
Adjustment item 4:3
50Hz
1. V-SHIFT 0 ~ 63
2. V-SLOPE 0 ~ 63
3. V-SIZE 0 ~ 63
4. H-CENT 0 ~ 63
5. H-SIZE 0 ~ 63
6. TRAPEZ 0 ~ 63
7. EW-PIN 0 ~ 63
8. COR-UP 0 ~ 63
9. COR-LO 0 ~ 63
10. ANGLE 0 ~ 63
11. BOW 0 ~ 63
12. V-S.CR 0 ~ 63
13. V-LIN 0 ~ 63
14. V-ZOOM 0 ~ 63
15. V-SCROLL 0 ~ 63
NOTE: The value with an asterisk * is variable for adjustment. The values in parenthesis (
COMPRESS: OFF (4:3)
Measuring
Item
instrument
V. SLOPE Signal
adjustment generator
Remote
control unit
V. HEIGHT Signal
adjustment generator
Remote
control unit
Screen
size
92%
1-22 (No.YA153)
Variable range
60Hz
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
-32 ~ +31
Test point Adjustment part
[4. DEF]
2. V-SLOPE
A
Blanking
line
B
[4. DEF]
3. V-SIZE
14. V-ZOOM
Initial setting value
4:3
50Hz 60Hz
0 0
+32* 0*
+38* 0*
+32* 0*
0 0
0 0
0 0
0 0
0 0
+32* 0*
+32* 0*
+32* 0*
+32* 0*
(+30) (0)
(+32) (0)
- PAL V. SLOPE -
(1) Receive a PAL circle pattern signal of vertical
frequency 50Hz.
(2) Select 4. DEF from the SERVICE MENU.
(3) Select 2. V-SLOPE.
(4) Set the initial setting value of 2. V-SLOPE.
(5) Adjust 2. V-SLOPE to make "A = B".
(6) Press the [DISPLAY] key twice to return to
SERVICE MENU screen.
- NTSC V. SLOPE -
(1) Input a NTSC circle pattern signal of vertical
frequency 60Hz.
(2) Make similar adjustment of NTSC V-SLOPE in the
same way as for "PAL V-SLOPE".
- PAL V. HEIGHT -
(1) Receive a PAL crosshatch signal.
(2) Select 3. V-SIZE.
(3) Set the initial setting value of 3. V-SIZE.
(4) Select 14. V-ZOOM.
(5) Set the initial setting value of 14. V-ZOOM.
(6) Adjust 14. V-ZOOM to make the vertical screen size
to 92% of the picture size.
- NTSC V. HEIGHT -
Picture
(1) Input a NTSC crosshatch signal.
size
(2) Make similar adjustment of NTSC V. HEIGHT in the
100%
same way as for "PAL V. HEIGHT".
) are fixed values.
Description