JVC AV-48WP34/AHA Service Manual page 52

AV-48WP30
Measuring
Item
Instrument
SUB COLOR / Signal
SUB TINT / generator
B-Y GAIN
adjustment
Oscilloscope
Remote
control unit
W
W
Setting value
Setting
A[V]
item
Standard
Signal
S01(W-R) S02(W-Y)
NTSC +28 +16
+7 +6
1080i
480i +22 +13
480p +19 +16
46
Test point Adjustment Item
TP-R
S01 : SUB COLOR
TP-B
S02 : SUB TINT
TP-E(# # # # )
S07 : B-Y GAIN
(-)
0
(+)
Y (W-Y) R (W-R)
Fig.1
(-)
0
(+)
(W-B)
B
Fig.2
Setting
Setting value
value
B[V]
C[V]
Theater Standard
S01(W-R) S02(W-Y) S07(W-B)
+19 +7 +7
+5 +7 +7
+7 +1 +1
+11 +2 +2
Table
1. Input the 480i color bar from computer terminal.
2. Select STANDARD and FULL mode.
3. Enter the SERVICE mode of 1.PICTURE/SOUND.
4. Connect the Oscilloscope to TP-R.
Adjust S01 ＜ SUB COLOR ＞ and S02 ＜ SUB TINT ＞
5.
to be following setting value A [V]. (Refer to the bellow
table)
Select THEATER and then adjust S01 ＜ SUB COLOR ＞
6.
and S02 ＜ SUB TINT ＞ to be following setting value
B [V] same as above. (Refer to the bellow table)
7. Connect the Oscilloscope to TP-B.
Select STANDARD and then adjust S07 ＜ B-Y GAIN ＞
8.
to be setting value C [V]. (Refer to the bellow table)
Select THEATER and then adjust S07 ＜ B-Y GAIN ＞ to
9.
be setting value D [V]. (Refer to the bellow table)
10. Receive 1080i color bar and then repeat steps 3. ～ 8.
above.
11. Receive 480p color bar and then repeat steps 3. ～ 8.
above.
12. Confirm that low-light is not different after adjusting
color, Tint and B-Y Gain. If it is green or magenta, to
adjust low-light again. If adjust again, to set offset value
again.
13. Press the MUTING key and memorize the set values.
1. Input the NTSC COLOR / TINT data is 480i COLOR /
TINT data offset value (Standard and Theater).
2. Receive the NTSC COLOR BAR from antenna terminal
and then select STANDARD mode.
3. Connect the Oscilloscope to TP-R.
4. Enter 8.PP from service menu.
Adjust VCM04 ＜ SUB COLOR ＞ and VCM01 ＜ SUB TINT ＞
5.
to be following setting value A [V]. (Refer to the bellow
table)
Select THEATER and then adjust S01 ＜ SUB COLOR ＞
6.
and S02 ＜ SUB TINT ＞ to be following setting value
B [V] same as above. (Refer to the bellow table)
7. Connect the Oscilloscope to TP-B.
Select standard and then adjust S07 ＜ B-Y GAIN ＞ to
8.
Setting
be setting value C [V]. (Refer to the bellow table)
value
Select theater and then adjust S07 ＜ B-Y GAIN ＞ to be
D[V] 9.
Theater
setting value D [V]. (Refer to the bellow table)
S07(W-B) 10. Confirm that low-light is not different after adjusting
COLOR, TINT and B-Y GAIN. If it is green or magenta,
+8
to adjust low-light again. If adjust again, to set offset
-24
value again.
-24
11. Press the MUTING key and memorize the set values.
-30
No. 51914
Description