Sanyo VMC-8613B NOTE, Adjustment tool, Adjustment mode, 3. SERVICE ADJUSTMENTS

3. SERVICE ADJUSTMENTS

1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes.

NOTE

Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting.

Adjustment tool

1.Digital multi meter

2.Pattern generator

3.Color analyzer

Adjustment mode

Over scan mode

ADJUSTMENT	TIMING	SETTING	VR	ADJUSTMENT PROCEDURE
ITEM	PATTERN		LOCATION
CHECK B+	PATTERN GENERATOR			TEST POINT : D910(-)
VOLTAGE	MONOSCOPE PATTERN			DIGITAL VOLT METER
				VALUE 46.0 ± 0.5 VDC.
HOLD DOWN	PATTERN GENERATOR	BRIGHT VR ,	VR503	TEST POINT : ZD501(-)
VOLTAGE	MONOSCOPE PATTERN	CONTRAST VR		DIGITAL VOLT METER
SETTING		and SHARP-		VALUE 8.5 ± 0.2 VDC.
		NESS VR TO
		MAX.
FOCUS	PATTERN GENERATOR	BRIGHT VR ,	FBT FOCUS	Adjusting FBT FOCUS VR to make
ADJUSTMENT	MONOSCOPE PATTERN	CONTRAST VR	VR	csreen corner & center focus be identical.
		and SHARP-
		NESS VR TO
		MAX.
HORIZONTAL	PATTERN GENERATOR	BRIGHT VR ,	VR401	Adjusting VR401 horizontal phase to
PHASE	MONOSCOPE PATTERN	CONTRAST VR		make screen right and left symmetrize.
ADJUSTMENT		and SHARP-
		NESS VR TO
		MAX.
VERTICAL	PATTERN GENERATOR	BRIGHT VR ,	VR302	Adjusting vertical linear control VR302 for
LINEARY	MONOSCOPE PATTERN	CONTRAST VR		equal spacing of lines between center
ADJUSTMENT		and SHARP-		extreme of scan.
		NESS VR TO
		MAX.
PINCUSHION	PATTERN GENERATOR	BRIGHT VR ,	VR304	Adjusting VR304 to make pincushion
ADJUSTMAN	CROSS HATCH PATTERN	CONTRAST VR		distortion be identical.
		and SHARP-
		NESS VR TO
		MAX.
VERTICAL	PATTERN GENERATOR	BRIGHT VR ,	VR303	Adjusting VR303 to make screen up &
CENTER	MONOSCOPE PATTERN	CONTRAST VR		down symmetrize.
ADJUSTMENT		and SHARP-
		NESS VR TO
		MAX.
VERTICAL	PATTERN GENERATOR	BRIGHT VR ,	VR301	Adjusting VR301 to make screen V-size
SIZE	MONOSCOPE PATTERN	CONTRAST VR		to level wide3/4.
ADJUSTMENT		and SHARP-
		NESS VR TO
		MAX.

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