Mitsubishi Electronics VS-60609 service manual Cb, Cr Circuit Purpose, 13. Cb, Cr Offset Symptom

MODELS: VS-45609 / VS-50609 / VS-55609 / VS-60609 / VS-60719 / VS-70709

[Cb, Cr Circuit]			Purpose:		To match the match grays between color and monochrome
13. Cb, Cr Offset			Symptom:		pictures.
					Grays have a color tint.
Measuring		-----	1.	Supply an NTSC White Raster with 25% luminance.
Instrument
Test Point		-----	2.	Activate the Service Mode, VCJ Function.
			3.	Set the data for item “30 COLH” to 63.
Ext. Trigger		------	4.	Adjust items “23 CBOF” and “24 CROF” for optimum gray.
			5.	Set the data for item “30 COLH” back to 31.
Measuring		-----
			6.	Save the data and exit the Service Mode.
Range
Input Signal		White Raster @ 25%
Input Terminal		NTSC Input
	SERVICE MODE
	Activate …….. MENU-0-1-5-7
	Function …...………..AUDIO
	Item No. ……….…….VIDEO
	Adjust Data ….…….ADJUST
	Save Data …. ………ENTER
	Exit …………..MENU (twice)

[On Screen Display Circuit]	Purpose:	To position the on-screen display.
14. Character Position	Symptom:	On-screen display is not positioned correctly.

Measuring	-----
Instrument
Test Point	-----
Ext. Trigger	------
Measuring	-----
Range
Input Signal	Monoscope

1.Supply a Monoscope signal to the Video or RF Input.

2.Select the Monoscope as the source for the main picture (Input button).

3.Activate the Service Mode, HR Function.

4.Use the Adjust Right/Left buttons to center the display horizontally. (A = B)

5.Save data and exit the Service Mode.

Input Terminal RF or Video

SERVICE MODE Activate …….. MENU-0-1-5-7

Function …...………..AUDIO

Item No. ……….…….VIDEO

Adjust Data ….…….ADJUST

Save Data …. ………ENTER

Exit …………..MENU (twice)

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