Daewoo DTQ-29U5SSFV, DTQ-29U4SCV, CN-401FN service manual Troubleshooting Guide, Appendix

TROUBLESHOOTING GUIDE Appendix

3. NO SOUND

Check The Output Signal of I701 #57,58

NG : Go To The Figure (C)

OK : Go To The Figure (D)

(C)

CHECK

CLOCK,DATA

SCL/SD

CHECK THE

CRYSTAL

(D)

		TU101								33V
		TUNER									CHECK
											THE
					IF					5V	VOLTAGE
			Z101
			SAW FILTER
									SIF
							#33
	#7,8
				I701
						#22,43,45,63,80					5V
											3.3V
								#9,16,86,88
#18,1

X701

24.576MHzCHECK THE VOLTAGE

5V

13V

CHECK THE

VOLTAGE

AUDIO INPUT

CHECK THE INPUT SIGNAL

#5 I601

LA42072N

#7

#8,9,11,12

#2,4 #6

MUTE

AUDIO OUTPUT

CHECK THE

OUTPUT

SIGNAL

CHECK THE

MUTE

SIGNAL(H:ON)

-44-