JVC AV 27D202, Service Manual

Page: 22 / 29

No. 51834
AV-N29302
22
Item
Measuring
instruments
Test point Adjustment part Description
SUB
BRIGHT
Adjustment
No.1 BRIGHT 1. Receive a broadcast.
2. Select No.1 BRIGHT of the PICTURE MODE.
3. Set the initial setting value of the No.1 BRIGHT with the LEFT
/ RIGHT key of the MENU.
4. If the brightness is not best with the initial setting value, make
fine adjustment of the No.1 BRIGHT until you get the optimum
brightness.
SUB
CONTRAST
Adjustment
No.2 PICTURE 1. Receive a broadcast.
2. Select 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 MENU.
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 contrast.
[ Method of adjustment without measuring instrument ]
SUB COLOR
adjustment Signal
generator
Oscilloscope
Remote
control unit
TP-R
TP-E(
# # # #
)
[CRT
SOCKET
PWB]
No.3 COLOR
1. Receive a broadcast.
2. Select “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 MENU.
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 “No.3 COLOR” to the PICTURE MODE.
3. Set the initial setting value of the “No.3. COLOR” with the
LEFT/RIGHT key of the MENU.
4. Connect the oscilloscope between TP-R and TP-E.
5. Adjust COLOR and bring the value of
(A)
in the illustration to the
voltage +20V (V
W-R
).
Y
W
W W
W
Cy
G
Mg
R R R R
B
(A)
0V
(-)
(+)