Daewoo DTQ-14V1FS/20V1FS Manuel d'utilisateur télécharger pdf (Page 24)

23

TROUBLESHOOTING GUIDE

3. NO SOUND

Check audio output signal of I101 #1

NG : Go to the figure e

OK : Go to the figure f

U102

TUNER

I701

MICOM

XC701

32.768KHz

#10 #11 #12

ST-BY

5V

#29 #30

Check

the crystal

T-DATA

T-CLOCK

5V

33V

IF OUT

#14

AFT

#27

#28

SDA

SCL

I101

SF101

SAW FILTER

#5 #6

#10

#8

#11

#12

Check

IF Vcc (5V)

Check

clock/data signal

#3

Check

IF AGC voltage

e

I601

TDA7267A

#1

#4

f

#52

#54

Check

SIF output signal

If no signal,

then change I101

Check

SIF input signal

#9

5V

Check

FM filter circuit

Check

Vcc of the sound AMP

R601

C602

SOUND

12V

C603

Audio in

Check

audio signal in

#2

C605

speaker

Check

audio signal out

#3

Q601

Micom #40

Audio MUTE

H:Mute L:Normal

C604

Check

L:Mute / H:Normal

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