Daewoo K3050MECHA service manual Linearity Adjustment

G. LINEARITY ADJUSTMENT

TEST POINTS	S/W PULSE TEST PIN	PATH ADJ. FIXTURE
	ENVELOPE TEST PIN	PATH ADJ. FIXTURE
MEASURING EQUIPMENT	OSCILLOSCOPE
ADJUSTMENT	VR CONTROL	PATH ADJ. FIXTURE
	S/T GUIDE ROLLER	TAPE TRANSPORTING SYSTEM

a. Connect the PATH ADJ. FIXTURE to PT01 of the MAIN CIRCUIT BOARD. b. Play back the ALIGNMENT TAPE (COLOR BAR SIGNAL).

c. Connect the channel-1 scope probe to the S/W PULSE TEST PIN of the PATH ADJ. FIXTURE. d. Connect the channel-2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ. FIXTURE. e. Adjust the VR CONTROL of the PATH ADJ. FIXTURE for maximum envelope signal output of the

alignment tape.

f. Adjust the S/T GUIDE ROLLER until the envelope signal waveforms of the entrance and exit sides are as shown in Fig. 5-7.

Fig. 5-7 LINEARITY ADJUSTMENT

32