JVC AV-27F802 Service Manual page 28

AV-27F802
Measuring
Item
instrument
SUB
CONTRAST
Adjustment
SUB COLOR Signal
adjustment generator
Oscilloscope
Remote
control unit
Y
G
Cy
W
SUB TINT Signal
adjustment generator
Oscilloscope
Remote
control unit
Y
G
Cy
W
PIP Signal
HIGH LIGHT generator
WHITE
BALANCE
28
Test point Adjustment part
No.2 PICTURE
TP-B No.3 COLOR
TP-E1( )
[CRT SOCKET
PWB]
R
(A)
(–)
0V
(+)
B
Mg
No.4 TINT
TP-B
TP-E1( )
[CRT SOCKET
PWB]
R
(–)
0V
(+)
Mg B
(B)
No.8 P R DR
No.10 P B DR
PIP screen
Main screen
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.
[ 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.
[ 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
[ 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.
[ 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
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. 51757
Description