Sharp XL-3000V service manual IC15V, Bex, Test Video CD, Video PWB-D, Gnd

XL-3000V

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	TVD-581A

∙ Measurement of oscillation frequency

Disc	Adjusting	Instrument	Specified Value
	Point	Connection
CD Stop	TC100V	27.00000 MHz	1of R163V and
		± 160 Hz	2of C183V

∙ Checking of video output signal Checking of color bar

Disc	Adjusting Point	Instrument
		Connection
Track 2	Video output terminal	Chroma Peak Level
		100 ± 15 IRE

VIDEO PWB-D

SET

Video Output Terminal

Video Input Terminal

TV

Figure 14-3 Checking of video output signal

IH (59.94Hz/NTSC)

1 PCLK2X

		100 IRE
140 IRE	(0.714V)

	100	100
			88.5
75		75

70Color bar signal waveform

41.5

IC14V R163V

C183V

IC15V

(1V) 20

33.5

5

2 GND

TC100V

X1V

Figure 14-1 ADJUSTMENT POINTS

40 IRE

(0.286V)

-20

-40

40IRE Color Burst

			0
				-13.5
G r a y	Y e l l o w	C y a n	M a g e n		G r e e n
			t a

		Horizontal
-25	-25	sync signal
R e d	B l u e

Figure 14-4

SET

VIideo Output Terminal

75 ohms

GND

Vectorscope

Waveform monitor or oscilloscope

Figure 14-2 Measurement of oscillation frequency

G r a y	Y e l l o w	C y a n	G r e e n	M a g e n	R e d	B l u e
				t a

TV monitor

Figure 14-5

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