Green bias adjustment
(R1443)
Video output bias
adjustment
(R1430)
Chroma Trap adjustment
(T401)
Brightness adjustment
(R2082)
White balance adjustment
(Red)
L) R1549:
Rdrive
C] R1446:
Rbias
Connect a DC volt meter between pin
(37) of IC1401 and GND.
. Receive
"PAL
COLOUR
BAR"
signal.
. Connect oscilloscope between pin
(8) of G connector
(G-OUT)
and
GND.
. Make the Colour control and the
Brightness control minimum.
. Receive "MONOSCOPE
PATTERN"
signal.
. Block optical path of red and blue
to get only green.
. Receive "MONOSCOPE
PATTERN"
signal.
14
Obtain 2.0+0.05V by turning
R1443.
Adjust R1430 so that the top and
bottom waveformes are symm-
etrical.
Obtain
minimum
peak-peak
value of waveform
by turning
TP401.
Obtain the point where the first
gradation A is blackened.
Obtain
minimum
peak-peak .
value of waveform
by turning
R1549 and 1446.