No Sound - Daewoo DTQ-14N2FC Service Manual

NO SOUND

CHECK FOR SIGNAL
AT IC501 #6
E
SOUND VOLUME
MAX: ~7V
DC
MIN: ~1V
DC
VOL-UP
DOWN
CONTROL
KEY
F
CHECK
9V
LINE
SOUND TAKEOFF
NO OUTPUT:
CHANGE IC501
4
LC501
LA7674
6
48
25
IC701
LOW PASS
LC864616A
FILTER
DISCONNECT LOAD
CHECK FOR SND,
PWM SIGNAL, IF
MISSING REPLACE
IC 701
11
DC
14
IC501
44
LA7674
48
SOUND
Z202
IF INPUT
YES
NO
IF 4 ISOK
& NO OUTPUT
THEN
CHANGE EC501
DE EMPHASIS
1
Z102
4
CHECK
FM DET
CIRCUIT
16
GO TO
GO TO
CHECK
CONNECTOR
P601
SP01
SPEAKER
5
I601
3
KA2201
6
CHECK
#6 Vcc
about 12V
E
F