Kenwood KRF-X7775D Service Manual page 15

Adjustment of Sub Color and Contrast (X35, VR1, VR2)
No. ITEM
1 SUB COLOR
2 CONTRAST
INSTRUMENTS CONNECTION
PATTERN
GENERA-
TOR
INPUT SIGNAL : 75% COLOR BAR SIGNAL
PARA METER
mV
LUMINANCE LEVEL
IRE
mV
CHROMA LEVEL
IRE
+V
CHROMA PHASE
(deg)
-V
0.825Vp-p
ADJUSTMENT OUTPUT SIGNAL :
FIG.1
0.825Vp-p
FIG.2
0.525Vp-p
ADJUSTMENT
INPUT
SETTINGS
PAL
75% COLOR BAR
(NO SET UP)
PAL
75% COLOR BAR
(NO SET UP)
RECEIVER
DUMMY
75 Ω
WHITE YELLO CYAN
525 465 368
0 470 664
167 283
193 77
525
Y LEVEL (VR2)
Cb LEVEL (VR1)
KRF-X7775D/X7775D-S/VR-5080/5090
OUTPUT ALIGNMENT
SETTINGS POINTS
Connect a component video
output(Y) to oscilloscope
VR2
with 75Ω.
Connect a component video
output(Cb,Cr) to oscilloscope
VR1
with 75Ω.
OSCILLOSCOPE
GREEN MAGENTA RED
308 217 157
620 620 664
241 61 103
119 299 257
P.C.B (X35-226)
VR2
Cr LEVEL
Except KRF-X7775D/VR-5080
ALIGNMENT
FOR
(Adjust an amplitude
of video signal.)
0.825Vp - p
(Adjust an amplitude
of video signal.)
±0.525Vp - p
BLUE
60
470
347
13
VR1
J 1
J 2
J 3
CN1
(VR1)
FIG.
FIG.1
FIG.2
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