JVC AV-20N3/D, AV-20NMG3/-A, AV-20NMG3B service manual Colour Ⅱ

AV-20N3
AV-20NMG3
AV-20NMG3B
Item	Measuring		Test point	Ad justment part		Description
	instrument
Ad justment	Signal		TP-47G/R	5. COLOUR	[Method of adjustment using measuring instrument]
of SUB	generator
COLOUR Ⅱ	Oscillo-		TP-E (#)	PAL COLOUR	1.	Input a PAL full field colour bar signal (75% white).
			[CRT SOCKET		2.	Enter the SERVICE MENU.
	scope
			PWB]		3.	Select 2. V/C from SERVICE MENU.
	Remote				4.	Select 5. COLOUR with the MENU ▼/▲ key.
	control unit
					5.	Set the initial setting value of PAL COLOUR with the MENU
						- / + key.
					6.	Connect the oscilloscope between TP-47G and TP-E (#).
				B	7.	Adjust PAL COLOUR to bring the value of (A) in the illustration
			R			to the voltage as shown given billow.
			Mg			(Voltage difference between (W) and (G))
				(－)		Model	Voltage(W-G)
						AV-20N3	+14V
				0V		AV-20N3/D
	W
		Y	(A)	(＋)		AV-20NMG3
		Cy				AV-20NMG3B	+10V
			G
						AV-20NMG3/-A
				SECAM COLOUR	1.	Input a SECAM full field colour bar signal (75% white).
					2.	Set the initial setting value of SECAM COLOUR with the MENU
						- or + key.
					3.	Adjust SECAM COLOUR to bring the value of (A) in the
						illustration to the voltage as shown given billow.
						(Voltage difference between (W) and (G))
						Model	Voltage(W-G)
						AV-20N3	+8V
						AV-20N3/D
						AV-20NMG3
						AV-20NMGB	+10V
						AV-20NMG3/-A
				NTSC 3.58 COLOUR	1.	Input a NTSC 3.58 full field colour bar signal (75% white).
					2.	Set the initial setting value of NTSC 3.58 COLOUR with the
						MENU - / + key.
					3.	Adjust NTSC 3.58 COLOUR to	bring the value of (A) in the
						illustration to the voltage as shown given billow.
						(Voltage difference between (W) and (G))
						Model	Voltage(W-G)
						AV-20N3	+11V
						AV-20N3/D
						AV-20NMG3
						AV-20NMG3B	+10V
						AV-20NMG3/-A
				NTSC 4.43 COLOUR	When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the
					respective values .

24 No. 52025