Daewoo DV-K580NZ-T service manual FM Deviation

ELECTRICAL ADJUSTMENT

(4) FM DEVIATION

Adjustment Parts	Check Point	Measuring Equipment	Test Tape	Input Signal
R392	TJ396	Signal Gen. Oscilloscope	Blank Tape	Color Bar

vCONNECTION METHOD

TJ396
TJ302
	CH-1
	Oscilloscope
	CH-2
R392
FM DEV	SIGNAL
	GENERATOR

vADJUSTMENT PROCEDURE

1)Supply the Color Bar Signal to the VIDEO IN JACK, and set the VCR to the REC mode.

2)Connect the oscilloscope to TJ396 and trigger scope with a composite sync signal at TJ302.

3)Record the Color Bar Signal for a few minute and playback it. Then confirm that the playback video

output level (TJ396) is 2.0 ± 0.2Vp-p.
4) Adjust as follows if the playback video output level
is not 2.0 ± 0.2Vp-p.
4-1)	Adjust R392 a little.
4-2)	Record the Color Bar Signal for a few minute
	and playback it.
4-3)	Confirm the playback video output level.
4-4)	Repeat the procedure of 4-1) to 4-3) until
		Horizontal :10 s/div
	the playback video output level becomes 2.0
		Vertical :0.5V/div

( 0.2Vp-p between sync tip and 100% white level.

TJ396

2.0V 0.2Vp-p

10