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AV-2771S
|
DECODER COLOR
SYNCHRONI-
ZATION
adjustment
SUB PICTURE
COLOR
DEMODULATION
LEVEL adjustment
Measuring
.
E
Test point
instrument
PY connector
pin-©
Pattren
generator
Frequency
TP-D4
counter
_ | TP-D9
Remote control
unit
Pattren
generator
Oscilloscope
(H-rate 10:1)
Remote contral
unit
600mVp-p
: TP-D6
300 seach
p: TP-D11
Straight
VERTICAL FILTER
adjustment
SUB PICTURE
DC OFFSET
adjustment
32 (No.50577)
Pattren
generator
Oscilloscope
(V-rate 10:1)
Remote control
unit
Pattren
generator
Oscilloscope
(V-rate 10:1)
Remote control
unit
Adjustment part
DECODER
COLOR SYNC.
trimmer capacitor
(C052)
DECODER TINT
vR
(VR006)
DECODER
COLOR VR
(VR005)
D/A CONVERTER
R-Y VR
(VR004)
V. FILTER VR
(VR007)
DC OFFSET VR
(VR001)
. Connect the oscilloscope to TP-D11.
. Connect the oscilloscope to TP-D10.
Description
. Use shorting clips or other means
to connect PY
connector pin-© to ground.
. Receive the color bar signal to both TV(antenna)
and VIDEO input.
. Set for the PIP mode.
. Use shorting clips or other means to connect TP-D4
to 5V line.
. Connect the frequency counter with TP-D9.
. Adjust DECODER
COLOR SYNC trimmer capa-
citor so that the frequency
is 3.579545MH2+
50Hz.
. Remove the connection between TP-D4 and the 5V
line.
. Receive the color bar signal to.both TV(antenna)
and VIDEO input.
. Set for the PIP mode.
. Connect
the oscilloscope to TP-D6.
Adjust the
DECODER TINT VR so that the right rising compo-
nent of the waveform is straight, as indicated in Fig.
A.
. Adjust the DECODER
COLOR
VR
so that the
waveform in Fig. A is 6(00mVp-p.
Confirm
waveform and 300+ 30mVp-p
as indicated in Fig.
A.
If waveform
sharp and value
differ,
repeat
above steps 3 and 4.
Adjust the
D/A CONVERTER R-Y VR to obtain 420mVp-p
waveform level as indicated in Fig. B.
. Receive the color bar signal to both TV(antenna)
and VIDEO input.
. Connect the oscilloscope to TP-D7.
. Set for the PIP mode and adjust V. FILTER VR so
that the heights of the white of the two waveforms
align
. Receive the full white signal with color burst to both
the TV(antenna) and VIDEO input.
. Set for the PIP mode.
. Connect the oscilloscope to TP-D2-and adjust DC
OFFSET
VR to minimize
the sub
picture
color
¥ minimurn
EES
A
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