JVC I' Art AV-27F802, Service Manual

Page: 28 / 33

AV-27F802
28 No. 51757
Item
Measuring
instrument
Test point Adjustment part Description
SUB
CONTRAST
Adjustment
1. Receive a broadcast.
2. Select the No.2 PICTURE of the PICTURE MODE.
3. Set the initial setting value of the No.2 PICTURE with the LEFT /
RIGHT key of the remote control unit.
4. If the contrast is not best with the initial setting value, make fine
adjustment of the No.2 PICTURE until you get the optimum con-
trast.
No.2 PICTURE
SUB COLOR
adjustment
[ Method of adjustment without measuring instrument ]
1. Receive a broadcast.
2. Select the No.3 COLOR of the PICTURE MODE.
3. Set the initial setting value of the No.3 COLOR with the LEFT/RIGHT
key of the remote control unit.
4. If the color is not the best with the Initial setting value, make fine
adjustment of the No.3 COLOR until you get the optimum color.
No.3 COLOR
Signal
generator
Oscilloscope
Remote
control unit TP-B
TP-E1(
)
[CRT SOCKET
PWB]
Y
G
R
W
Cy
(–)
0V
(+)
Mg
B
(A)
[ Method of adjustment using measuring instrument ]
1. Input the full field color bar signal (75% white).
2. Select the No.3 COLOR of the PICTURE MODE.
3. Set the initial setting value of the No.3. COLOR with the LEFT/RIGHT
key of the remote control unit.
4. Connect the oscilloscope between TP-B and TP-E1.
5. Adjust COLOR and bring the value of (A) in the illustration to the
voltage –5V (V
W-B
).
SUB TINT
adjustment
[ Method of adjustment without measuring instrument ]
1. Receive a broadcast.
2. Select the No.4 TINT of the PICTURE MODE.
3. Set the initial setting value of the No.4 TINT with the LEFT/RIGHT
key of the remote control unit.
4. If the tint is not the best with the initial setting value, make fine ad-
justment of the No.4 TINT until you get the optimum tint.
No.4 TINT
Signal
generator
Oscilloscope
Remote
control unit TP-B
TP-E1(
)
[CRT SOCKET
PWB]
Y
G
R
W
Cy
(–)
0V
(+)
Mg B
(B)
[ Method of adjustment using measuring instrument ]
1. Input the full field color bar signal (75% white).
2. Select the No.4 TINT of the PICTURE MODE.
3. Set the initial setting value of the No.4 TINT with the LEFT/RIGHT
key to the remote control unit.
4. Connect the oscilloscope between TP-B and TP-E1.
5. Adjust TINT and bring the value of (B) in the illustration to the volt-
age +4V (V
W-Mg
).
PIP
HIGH LIGHT
WHITE
BALANCE 1. Receive a black-and-white signal. (Color off)
2. Select the PIP MODE from the SERVICE MENU.
3. Then adjust the white color of the PIP screen using the No. 8 P R
DR and the No. 10 P B DR of the PIP MODE so that it is the same
brightness as the main screen.
No.8 P R DR
No.10 P B DR Signal
generator
PIP screen
Main screen