Daewoo DTQ-14V5FSP/20V4FSP, DTQ-14V1FC/20V1FC, DTQ-14U1FSP/20U1FSP service manual No Sound, Micom

TROUBLESHOOTING GUIDE

3. NO SOUND

Check audio output signal of I101 #1

NG : Go to the figure e

OK : Go to the figure f

e
33V	5V
U102		IF OUT	SF101
TUNER			SAW FILTER
T-DATA T-CLOCK
#29	#30		#5	#6		Check
					IF AGC voltage
	#14	AFT	#10		#3
I701			#8		#52	Check
		Check				SIF output signal
MICOM				I101	#54
		IF Vcc (5V)				If no signal,
	#27
		SDA	#11			then change I101
	#28	SCL
#10	#11 #12		#12			Check
XC701					SIF input signal
32.768KHz	ST-BY	Check			#9
		clock/data signal
	5V			Check		5V
Check
			FM filter circuit
the crystal
f
Check			Check
Vcc of the sound AMP
			audio signal out
SOUND	R601
12V	#1
	C602	#2
		C605
Audio in	#4	I601		speaker	Check
	C603	TDA7267A			L:Mute / H:Normal
Check
		#3			Micom #40
audio signal in
			C604		Audio MUTE
					H:Mute	L:Normal
				Q601
		23