Daewoo 20T2, 21Q2, 21Q1, 14T2, 21Q4, 14Q2, 20Q1, 14Q1, 21T2, 20Q3, 14T1, 21T1, 14Q3, 20Q2 No Pictureraster OK

2. NO PICTURE(RASTER OK)

CHECK VIDEO SIGNAL AT PIN 13 OF I501(TDA8374A)

[REFER TO WAVEFORM ]

	ABNORMAL
CHANGE INPUT MODE
RF	AV RF	CHECK / REPLACE
	ABNORMAL	I701	ABNORMAL
		& PERIPHERAL
		COMPONENT
CHECK PICTURE CONDITION
NORMAL	NORMAL
FAVOURITE			CHECK /
		CHECK /
	ABNORMAL		REPLACE
		REPLACE
			R759,R720
		Q702, Q703
			I703
CHECK TUNING VOLTAGE		OK
AT VT OF TUNER			ABNORMAL
	ABNORMAL	CHECK 33V LINE
	NORMAL
CHECK BAND SELECT
VOLTAGE AT BL,BH,BU
& B+ VOLTAGE			ABNORMAL
OF TUNER

	CHECK / REPLACE	CHECK / REPLACE
ABNORMAL
	AT PIN 40, 41, 42	I901, I902, I903
NORMAL
	OF I701	(CRT BOARD) OK

CHECK / REPLACE TUNER

NORMAL

NORMAL

		OK	CHECK / REPLACE
CHECK / REPLACE
			Q705,Q706,Q707
Q101, Q102, SF101			Q708,Q709,Q710
CHECK / REPLACE
	I501

NORMAL

CHECK WAVEFORM AT

PIN 29, PIN 30 OF I501

		NORMAL		ABNORMAL
CHECK WAVEFORM			CHECK / REPLACE
AT PIN 31, PIN 32
			I501
	OF I501

	NORMAL		ABNORMAL
CHECK WAVEFORM		CHECK / REPLACE
AT PIN 19, 20, 21		I502(TDA4665)
OF I501		I503(TDA8395)

	NORMAL		ABNORMAL
CHECK VIDEO SIGNAL		CHECK SIGNAL
AT CATHOD OF CRT
		AT PIN 18
[REFER TO WAVEFORM
		OF I501
]
	NORMAL		ABNORMAL
CHECK / REPLACE		CHECK VOLTAGE
		VIDEO B+,
CRT
		HEATER
			ABNORMAL
		CHECK
OK		HORIZONTAL
		CIRCUIT PARTS

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