Adjustment - Sharp XL-30V Service Manual

XL-30V
CD SECTION
Since this CD system incorporates the following automatic
adjustment function, when the pickup is replaced, it is not
necessary to readjust it.
VIDEO CD SECTION
A-BEX Model No. TVD-581
TEST VIDEO CD
• Measurement of oscillation frequency
Disc Adjusting Instrument
Point Connection
CD Stop TC100V 27.00000 MHz
± 160 Hz
• Checking of video output signal
Checking of color bar
Adjusting Point
Disc
Track 2 Video output terminal
Figure 12-1 ADJUSTMENT POINTS
SET
VIideo Output Terminal
75 ohms
Figure 12-2 Measurement of oscillation frequency
TVD-581A
Specified Value
1
2 of R163V and
of C183V
Instrument
Connection
Chroma Peak Level
100 ± 15 IRE
VIDEO PWB
XL100V
TC100V
2 C183V
GND
IC14V
R163V
IC15V
1
PCLK2X
GND
Vectorscope
Waveform monitor
or oscilloscope

ADJUSTMENT

SET
Figure 12-3 Checking of video output signal
140 IRE
(1V)
40 IRE
(0.286V)
40 IRE
Color Burst
– 12 –
Video Output Terminal
Video Input Terminal
(59.94Hz/NTSC)
IH
100 100
88.5
75
75
100 IRE
(0.714V)
33.5
20
5
0
-13.5
-20
-40
Figure 12-4
TV monitor
Figure 12-5
TV
Color bar signal
70
waveform
41.5
Horizontal
sync signal
-25 -25